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Line Distance Protection and ControlTerminal Unit

Edi ão 11st Edition

A P L I C A T I O N

The TPU L420 has been designed as a protection and terminal unit for supervision and

control of aerial lines, integrating the distance protection function, with a main application

in line feeders.

The TPU L420 performs a wide range of protection and automation functions. It has an

extensive range of user programming options, offering high accuracy regulation in

currents, voltages, temporisations and optional characteristics. All protection and

automation functions settings are independent among themselves, having 4 groups of

settings for each function.

There are 3 different versions of the TPU L420 which offer the user the flexibility to

choose the suitable relay for each application. The possibility to program logic

interlockings complementary to the existent control functions provides additional

protection configuration that can be used to adapt the unit to the user’s needs.

The local interface of the TPU L420 integrates a graphic display where is presented amimic with the state of all equipment of the bay, as well as its respective measurements.

In the front panel there are also several functional keys that allow an easy operation of

the protection in the most frequent operation situations.

As a terminal unit, the TPU L420 is capable of accurate measurements of all the values

of a line and several fault monitoring functions, including Oscillography and Event

Chronological Recorder. These functions allow its integration as a Remote Unit in

EFACEC’s Supervision Command and Control Systems, offering at the same time a

connection to a PC.

Together with the TPU L420 is supplied an integrated software package for PC interface

with the protection – WinProt – either locally or trough the local communication network.

This application allows, besides other functionalities, the access and modification of relaysettings and configurations and also the gathering and detailed analysis of the produced

records.

21/21N

78

50HS

50/51

50/51N

67/67N

85/21

85/67N

27WI

46

79

25

62/62BF

43

P R O T E C T I O N

Distance Protection (21, 21N), 5 independent zones

with quadrilateral characteristic

Overreach of Zone 1 Distance Protection

Power Swing Blocking / Out of Step Tripping (78)

Switch-Onto-Fault protection (50HS)

High Set Overcurrent Protection with High- Speed

Tripping (50, 50N)

Low Set Overcurrent Protection with Definite or

Inverse Time (51, 51N)

Overcurrent Protection with extensive Setting Range

(2nd

51, 51N)

Directional Phase and Earth Fault Overcurrent

(67, 67N)

Distance Protection Teleprotection Schemes (85, 21)

Directional Earth Fault Protection Teleprotection

Schemes (85, 67N)

Echo and Weak End Infeed Logic (27WI)

Remote Tripping

Phase Balance (46)

4 Group of settings

C O N T R O L A N D M O N I T O R I N G

Automatic Reclosing (79)

Synchronism and Voltage check (25)

Supervision of VTs

Circuit Breaker Failure Protection (62BF)

Trip Circuit Supervision (62)

Protection Trip Transfer (43)

Dead Line Detection

Circuit Breaker and Disconnector Supervision

Distributed Automation

Programmable Logic

Configurable Analogue Comparators

High Precision Measurements

Load Diagram

Event Chronological Recorder Oscillography

Fault Locator

High number of Binary Inputs and Outputs

Self-Tests and Watchdog

I N T E R F A C E S

Graphical Display with Mimic

Functional Keys to Operate Equipments

8 Programmable Alarms

3 Serial Ports for PC connection

Lontalk Interface Network

100 Mbps Ethernet Redundant Interface

DNP 3.0 Serial Protocol

IEC 60870-5-104 Protocol

IEC 61850 Protocol



TPU L420 1ST EDITION – REV. 1.7, MAY 2010 2/23

P R O T E C T I O N F U N C T I O N S

Distance Protection

The distance protection offers complete

protection against all kind of faults in

systems where the neutral connection to

earth is solid or by means of a limiting

impedance. The TPU L420 has five

distance protection zones, with

quadrilateral characteristic, working in

parallel and completely independent.

Distance Protection Characteristic

For each protection zone, six independent

measurement systems are considered,

three for the phase to phase fault loops

and three for the phase to earth fault loops,

according to a full-scheme drawing.

The phase to earth faults are detected by

monitoring the neutral current and the zero

sequence voltage. Additionally, the TPU

L420 implements a judicious selection of

the fault loop more suitable to each short

circuit, including time-evolving faults, in

order to assure a correct operation of the

protection and an adequate signalisation ofthe involved phases.

The range of the operational characteristic

both in reactance and resistance can be

separately regulated for phase to phase

loops and for phase to earth loops, which

allows considering higher fault resistance

in case of earth faults or higher inaccuracy

in the calculation of line impedance for this

type of faults.

The resistance or reactance values which

define the operation thresholds and the

characteristics of the protected line can beset in primary or secondary values of the

measurement transformers.

The operation times can also be separately

regulated for the two types of fault loops.

There are two different start conditions for

the distance protection: minimum

impedance or maximum current. In the first

option, the function starts if the fault is

located in any of the five operation zones;

in case of maximum current start the

distance protection operation is additionally

supervised by settable current thresholds.

Any of the protection zones can be

configured as non-directional or directional

and in the last case is possible to choose

the direction of the operation.

For each fault loop, the TPU L420 uses the

memory of pre-fault voltages in the non-

faulty phase(s) to determine the direction of

the fault current and to evaluate the

directional characteristic. When the

memory is full, the instantaneous values of

the same voltages are used. These

choices allow a correct selection of the

short circuit currents’ direction, even for

close-in faults and for the first instants after

fault occurrence.

Additionally is possible to adapt the

operational characteristic to the specificparameters of the line to be protected, in

particular to consider different angles for

the forward stages and the reverse stages.

The k0 compensation factor of the fault

impedance calculation for phase to earth

short circuits may also present different

values for the first stage and, among the

remaining stages, for those operating

forward and for those operating reverse.

The distance protection algorithm makes

the compensation of the load current in the

evaluation of the characteristic reactancethresholds, being immune to the influence

of the fault resistance.

The TPU L420 also allows the

discrimination of load conditions with total

security and stability eliminating the

respective impedances of the operation

zone by means of a suitable characteristic.

Overreach of Zone 1 Distance

Protection

The reactance reach of the zone 1 distance

protection may be changed according to

one logic condition. Different reaches canbe set for phase to phase faults and for

phase to earth faults.

This function can be used in a fast tripping

scheme for any fault in the protected line,

in interaction with the automatic reclosingfunction, without the need to communicate

with the protection on the other side of the

line. In this case, the overreach will remain

active in resting condition as long as the

reclosing is ready to operate, and the first

protection zone will go back to normal

parameters after the corresponding trip.

The overreach of the zone 1 distance

protection may also be integrated in a

specific teleprotection scheme – zone

acceleration or ZA.

Power Swing Blocking / Out of StepTripping /

The loop impedances calculated by the

Distance Protection may present its

operational characteristics within a power

swing condition, what may cause the

protection step tripping, if there is no active

blocking element.

R

X

Zona 4

Zona 1

Zona 2

Zona 3

Zona 5

∆Z

∆Z

Power swing’s evaluation area.

The module of Power Swing Blocking / Out

of Step Tripping by TPU L420 Synchronism

Loss distinguishes the power swing’s

default situations, through the continuous

and supervision of the impedances

evolution criteria, allowing the selective

blocking of any Distance Protection step.

Beyond the power swings detection of, the

TPU L420 evaluates the synchronism loss

occurrences, being able to allow the

tripping, if the conditions are about to

verify.

Switch-Onto-Fault Protection

When energising a faulty line, the distanceprotection may not offer adequate

equipment protection. This problem is

R

X

ϕ

Zone 4

Zone 1

Zone 2

Zone 3

Zone 5




especially relevant for three phase close-in

faults when the voltage transformers are

connected on the line’s side because the

distance protection can loose its directional

feature due to the absence of the voltages

memory.

The switch-onto-fault protection completes

the distance protection, by providing fast

elimination of permanent faults after a

manual close operation. However, this

function can also be activated in case of

close operations by automatic reclosing.

The switch-onto-fault protection is an

additional overcurrent function, with

instantaneous operation. This function can

be activated by internal criteria resulting

from the evaluation of the dead line

detection module or, as an option, by theobservation of external contacts associated

to the circuit breaker close command and

to the device’s state.

The function remains activated for a

configurable time after the previous

conditions changed to rest.

Additionally, some stages of the distance

or earth directional protections can be

configured by changing the factory set

logic, for example, for instantaneous

operation during the activation conditions

of the switch-onto-fault function.

High Set Overcurrent with high-

speed tripping

The high set overcurrent protection is

usually targeted for very fast protection

where selective coordination is obtained

through the setting of the RMS current

(cut-off ). In the TPU L420, high sets are

independent for protection of phase to

phase faults and of phase to earth faults. A

selective timing can also be set.

Low Set Overcurrent with

definite/inverse time

The low set overcurrent protection offers

sensitivity and step timings for selective

coordination (time-lag overcurrent). The

TPU L420 provides both the independent

and the inverse time options. These

options comply with International

Standards, which is a guarantee for

compatibility with other devices. The

functions of TPU L420 meet the IEC

60255-3 and IEEE 37.112 standards.

The settings of the low set overcurrent

function are also independent for phase tophase and for phase to earth faults.

For the IEC complying option, the time-

current functions follow the general

expression:

[ ]1)/( −>

=b

I Icc

aT st op

NI a=0,14 b=0,02 A=16,86

VI a=13,5 b=1 A=29,7

EI a=80 b=2 A=80

LI a=120 b=1 A=264

For the IEEE complying option, the time-

current functions follow the general

expression:

[ ] IEEE op T ed I Icc

cst ⎟⎟

⎠

⎞

⎜⎜

⎝

⎛ +

−>=

1)/(

NI c=0,103 d=0,02 e=0,228 A=9,7

VI c=39,22 d=2 e=0,982 A=43,2

EI c=56,4 d=2 e=0,243 A=58,2

LI c=56,143 d=1 e=21,8592 A=133,1

Definite Time Universal Overcurrent

with wide setting range

In parallel and independently from the

previous functions, the TPU L420 performs

a second overcurrent protection function

with constant time.

The wide setting range of this protection

function allows several applications.

The several stages of the overcurrent

protections, particularly those of the

functions against phase to phase faults can

operate permanently, in parallel with the

distance protection or, as an option, be

activated only in case of distance

protection lock due to malfunction in the

voltage transformers circuit.

Option between virtual image of the

zero sequence current and direct

observation of the 4th current input

The TPU L420 is prepared to observe the

zero sequence current of the line in its 4th

current input, obtained either from the

connection of the neutral point of the phase

currents inputs, or from a toroidal current

transformer in the line. However, the TPU

L420 also performs internally the

calculation of the zero sequence current in

the line, directly from the virtual sum of the

three phase currents.

For each of the three earth fault protection

elements, the TPU L420 allows theselection of the source of the zero

sequence current. This fact allows

combining the observation of high phase to

earth fault currents, using the wide

operation range of phase CT, with the high

sensitivity to high resistive faults given by

the toroidal transformer. The sensitivity can

even be increased by choosing a lownominal value for the fourth current input

(0,2 or 0,04 A).

Directional Earth Fault Overcurrent

Protection

The distance protection may not guarantee

the necessary sensitivity for the detection

of all short circuits to the earth, in particular

in networks whose neutral does not have a

solid connection to earth or if the fault

resistance is high.

For this type of short circuits the earth fault

overcurrent protection can be acomplementary function to the previous

one, if directional criteria are added.

Through the measurement of the zero

sequence active and reactive powers is

possible to differentiate the forward faults

and the reverse faults relatively to the

protection location. The measure of these

power values is equivalent to the ratio

between the phase fault current and the

zero sequence voltage. This is used in the

directional function.

The directional protection worksindependently from the overcurrent

protection. Its role is to lock tripping when

the fault is not in the indicated direction.

The maximum sensitivity angle of operation

is selectable between -90º and 90º.

It is possible to choose the direction in

which the protection is intended to operate.

It is also possible to choose the operation

of the directional protection in case of

polarising voltage absence.

The locking by the directional function can

be independently attributed to each one of

the earth fault overcurrent stages.

U0

I0

7º

α

Relay non-operation zonedirection: front




Option between bus voltage and

zero sequence voltage

The base TPU L420 has a 4th voltage input

beyond the three phase voltages. In the

TPU L420-D version, this input can be

used to connect a zero sequence voltage

image, obtained from a second set of VTs.

The directional earth protection can be

configured to work with this voltage or with

the internal sum of the phase voltages.

In the TPU L420-R version, the 4th voltage

input can be used to measure the zero

sequence voltage or the bus voltage. The

last option must be selected if one wishes

to activate the synchronism check function.

In this case the directional earth protection

must use the sum of the three phase

voltages.

Directional Phase Fault Overcurrent

Protection

The TPU L420 also features a directional

phase fault overcurrent protection, which

runs independently from the directional

earth fault overcurrent protection.

To determine the current direction in each

phase it is used the composed voltage of

the other two phases, which maximises the

protection’s sensitivity. The direction of the

fault current is obtained even when the

voltage collapses (very close fault). To

perform this function, the TPU L420 stores

the pre-fault voltage for 2.5 seconds. Afterthat time it is possible to select the

directional function behaviour.

The maximum power angles are selectable

in a range between 30º and 60º. It is also

possible to choose, as for directional earth

protection, the direction in which the

protection is intended to operate.

The locking by the directional function can

be independently attributed to each one of

the phase fault overcurrent stages.

Teleprotection Schemes for

Distance Protection

The typical setting of the first and second

stages of the distance protection in terms

of reach of the characteristics and the

respective operational times leads to a non

instantaneous clearance time for faults

occurring in the remote end of the line.

When associated to teleprotection

schemes, the distance protection provides

instantaneous clearance time for faults

occurring anywhere in the protected line.

The TPU L420 has several types of

schemes associated to the distance

protection – DUTT, PUTT, POTT,

POTT+DCUB and DCB, which are adapted

to several network characteristics. These

schemes are prepared for feeders with 2 or3 terminals and have elements to lock due

to operation direction change.

All schemes are implemented in the base

logic of the TPU L420. It is only necessary

to select the desired scheme and to

associate the starts and/or trips of the

related stages to the corresponding logical

gates of the distance teleprotection. The

versatility of the TPU L420’s programmable

logic also allows building additional logical

schemes, thus enabling to adapt the

teleprotection schemes to any particularity

of the network.

Teleprotection Schemes for

Directional Earth Fault Protection

Similarly to the distance protection, the

TPU L420 provides in its factory logic

several types of teleprotection schemes for

association with the directional earth fault

protection – POTT, POTT+DCUB, DCB.

This module has all the characteristics and

easy configuration features presented for

the schemes associated with the distance

protection.

Echo and Weak End Infeed Logic

Complementary to some teleprotection

schemes, namely the POTT scheme, the

TPU L420 provides the additional logic for

execution of the echo and tripping emission

functions in case of weak end infeed. The

module’s logic associated with the distance

protection is independent of the logic

associated with the earth directional.

The echo logic allows the emission of a

tripping unlock signal in the other side of

the line, in cases where the TPU L420 is

not able to detect the fault. This may

happen, for example, due the unfavourable

conditions of the reason between the

upstream impedances and of the proper

line.

The weak end infeed’s logic allows,

besides that, the emission of a tripping

signal in the proper terminal that is not able

to detect the default. This tripping is

conditioned, for the distance protection, by

a fact, in at least one of the phases, of

voltage break under the parameterized

threshold, and for the earth directional

function, by the existence of an earth

voltage superior to a threshold also

configurable by the user.

Remote Tripping

The remote tripping function allows the

TPU L420 to trip upon reception of an

external order. It is possible to associate a

time delay between the signal reception

and the send of the trip.

Phase Balance

The phase balance protection aims at the

detection of high values of the negative

sequence current component of the three-

phase system. The main application of this

function is as unbalance protection that can

be used in several situations.

The detection of broken conductors with or

without earth contact, as well as the

detection of phase absence are the goalsof this protection due to the resulting

negative sequence significant component.

The phase balance protection can also be

used to eliminate two-phase faults, having

in these cases a high sensitivity resulting

from the difference of the negative

sequence component in normal load and

unbalance situations.

The TPU L420 has two independent stages

of phase balance protection. The first one

is of definite time with fast operation but

less sensitive. The second stage is

targeted at a more sensitive time

protection. The timer can be of definite or

inverse time, supporting the same

standards as the other overcurrent

protections.

Fault Locator

Complementing the protection functions,

the fault locator gives very accurate

information on the distance to the

eliminated short circuits. The start signals

of the functions of distance protection and

of earth fault directional overcurrent

protection are only used to define the fault

loop or loops and the fault locator function

operates independently of those functions.

5º

α

Relay non-operation zonedirection: front

UR

US UT

IR

UST




The algorithm used compensates the load

current in lines fed by two or more

terminals. The fault loop and the distance –

in Ω, km (or miles) and percentage of the

line protected – are presented for the last

ten detected faults.




C O N T R O L A N D A U T O M A T I O N

Automatic Reclosing

The TPU L420 executes the automatic

reclosing automatism, allowing the

execution of up to five reclosing cycles,

completely configurable. The main purpose

of this function is the service restoration of

a line after the elimination of temporary or

intermittent faults, common in aerial

networks.

Reclosing sequence starts with the

disconnection of the faulty line, followed by

the reclosing command, after the dead time

defined for the current cycle.

After the closing command, the automatism

waits a configurable time to confirm faultabsence. If the fault is still present after the

reclosing attempts, a definitive trip signal is

generated.

The logic conditions for automatic reclosing

operation are configurable through the

programmable logic of the TPU L420. By

default, they correspond to the first stage

trip of the distance protection and the

teleprotection schemes

Synchronism and Voltage Check

This module compares two distinctvoltages, one from the line’s side and the

other from the bus’ side, to bind the

command of circuit breaker close

according to the type of synchronisation

and the type of command – manual or

automatic.

Voltage measurements in feeder and in bus

The line voltage measurement can be a

phase to earth voltage or a phase to phase

voltage and the voltage measurement from

the bus’ side must be acquired in the 4th

voltage input. The function is ready to be

used even when the line and bus VTs have

different transformation ratios or when

there is a transformer between the line and

the bus, through the magnitude and phase

adjustment of the bus voltagemeasurement.

The synchronisation types are

characterised according to the line and bus

state – LLLB (live line/live bus), LLDB (live

line/dead bus), DLLB (dead line/live bus),

DLDB (dead line/dead bus).

In the TPU L420, the evaluation criteria of

voltage presence in the line/bus do not

depend only on the comparison of voltage

measurement with threshold setting values

Ulive/Udead. They are complemented with the

VTs fault signal and the frequencymeasurement.

In LLLB synchronisation, where the

mechanical efforts on the circuit breaker

and the resulting transient after close

should be minimised, the TPU L420

evaluates the differences of voltage,

frequency and phase, allowing the circuit

breaker close only when all values are

below the setting thresholds.

The manual and automatic commands are

individually treated. After the request ofcircuit breaker close, a time delay is

initiated to wait for close permission. The

permission is conditioned by the evaluation

of the measurements involved according to

the parameterised method, or without any

kind of verification if the release option is

activated.

The base logic of the TPU L420 binds the

local, remote and external orders of circuit

breaker close to manual commands and

the close orders originated by reclosing are

binded to the automatic commands.

Supervision of VTs

The VTs supervision function available in

the TPU L420 detects malfunction in the

voltage transformers’ circuits and

generates orders to lock the functions

depending of voltage measurement,

particularly the distance protection in the

case of TPU L420, thus preventing inrush

tripping.

This function has two distinct methods to

distinguish and detect asymmetrical andsymmetrical faults.

To detect asymmetrical faults, the function

continuously evaluates the negative and/or

zero sequence components of voltagesand currents – if one of the voltage

components surpasses the threshold

values, if the corresponding current

component is inferior to the defined

threshold and if there is current in at least

one of the phases, the lock signalisation is

generated. After a given time delay the lock

can become definitive and remain so

independently of the magnitudes of the

negative and zero sequence current

components. It will be unlocked only when

the voltages are restored.

To detect symmetrical faults, the function

differentiates the VT malfunction in two

distinct situations: when the line is

connected and after line connection. In the

first case, the malfunction is signalised

when the voltages of the three phases are

below the parameterised threshold and if,

simultaneously there is not a significant

variation of the current value in any of the

phases. In the moment when the line is

connected, the lock conditions occur when

the three voltages have a value inferior to

the threshold, if there is current in at least

one phase with magnitude above thethreshold, and absence of protection

functions start; the lock signalisation is

generated after a defined time delay after

the line connection.

Circuit Breaker Failure Protection

The main purpose of this function is to

verify the correct operation of a circuit

breaker in case of fault. Its operation is

based on the information produced by the

overcurrent protection functions.

Thus, immediately after the execution of acircuit breaker trip command by any

protection function, the breaker failure

function starts. If the protection function

does not reset after a configurable time (for

example, due to circuit breaker damage), a

command is generated to other equipment

(for example the upstream circuit breaker).

This information may be transmitted by

dedicated cabling or through the local

communication network.




Trip Circuit Supervision

The TPU L420 can permanently monitor

the trip circuit of the circuit breaker through

binary inputs configured for that purpose.

If there is some discontinuity when thecircuit breaker is closed, the trip circuit

supervision input resets and an alarm is

generated after a configurable time.

Supervision scheme of the circuit breaker trip

Protection Trip Transfer

The TPU L420 executes the protection

transfer function. Its operation consists in

the monitoring of the bypass disconnector

state, when existent, in order to operate the

bus-coupler circuit breaker.

When the panel is transferred, some

automatisms, such as the automatic

reclosing are locked, and tripping

commands of the protection functions are

executed on the bus-coupler circuit

breaker.

Dead Line Detection

The dead line detection is performed in the

TPU L420 by an auxiliary function. The

state of the line can be determined

according to two distinct criteria.

The first is based on current and voltage

absence simultaneously in the three

phases and it is valid for lines where thevoltage transformers are connected in the

line itself. In case the voltage transformers

are directly connected to the bus, an

alternative criterion of current absence and

circuit breaker opening can be used as

long as the circuit breaker state is

monitored. The line is considered to be

disconnected, in any of the cases, after a

configurable confirmation time.

Circuit Breaker and Disconnector

Supervision

The TPU L420 allows two distinct

mechanisms to execute commands.

Through the local interface, it is possible to

select any device and to command it.

Remotely, it is also possible to execute the

same operation. However, such actions are

conditioned to the interlockings related with

the communication.

Each command received, either locally or

remotely, is monitored and the success of

the operation is signalled. The monitoring

is based on the state variation observation

of the binary inputs associated to each

device. The operation supervision is

available for circuit breakers and for

disconnectors.

Programmable Log ic

One of the main features of the TPU L420

is a completely programmable logical

scheme which allows the implementation of

timers, programmable delays or other

logical combinations beyond the traditional

logical functions (OR and AND).

The TPU L420 has internally a set of

modules formed by a variable number of

logical gates. The user may change all

internal connections within the module

and/or interconnect the several modules.The user may also change the descriptions

associated to each logical gate, the gate

type, the timers, the initial gate state, etc.

This flexibility may be used to configure

additional interlocking to the control

functions or any other complex logical

conditions.

Distributed Automation

The complete integration of the TPU L420

in Supervision Command and Control

Systems allows the definition of control

functions that take advantage of their

connection to the local area network (LAN).

This means that, besides the vertical

communication with the control centre, fast

communication mechanisms among the

several units are available.

This feature gives the possibility to

implement advanced automatisms,

interlockings or other logical functions

based on the interaction through the local

communication network. This function is

available in versions integrating thefollowing communication protocols:

Lontalk Protocol;

IEC 60870-5-104 Protocol; IEC 61850 Protocol.

Operation Modes

The TPU L420 allows the specification of

several operation modes, which affect the

operation of the control and protection

functions.

In the front panel there are two operation

modes, configurable by the user. They are

usually associated with the bay operation

mode, specifically with the control and

supervision functions performed by the

relay. Current status of each mode is

signalised by LEDs and may be directly

changed through the associated functional

keys.

Besides theses modes, the TPU L420 also

includes a menu to access other operation

modes that may be required.

The Local/Remote operation mode defines

the relay behaviour concerning the

received information from the Supervision

Command and Control System. When in

Local Mode all remote operations are

inhibited.

The Manual/Automatic mode concerns the

control functions executed by the TPU

L420. When in Manual Mode all control

functions are locked. This mode is

fundamental to perform maintenance tasks,

with the system in service.

The Normal/Emergency mode refers to the

system’s special operation. When in

Emergency mode all logical interlockings of

circuit breaker commands are inhibited.

The Special Operation mode is

characterised, by default, by the

instantaneous operation of the phase and

the earth overcurrent protections. However,

other logical conditions can be configured.




M O N I T O R I N G

Measurements

The TPU L420 accurately measures, in

almost stationary state, the following

values:

RMS value of the three phase currents

and the zero sequence current (4th

current input and virtual sum of the three

phase currents);

RMS value of the inverse current;

RMS value of phase to earth and phase

to phase voltages and zero sequence

voltage, obtained by virtual sum of the

three phase voltages and the 4th voltage

input; Line frequency and bus frequency;

Differences of magnitude, phase and

frequency between the line voltage and

the bus voltage;

Active and reactive power and power

factor;

Active and reactive energy counting

(values stored in flash memory) supplied

and received;

Resistance and reactance per loop.

Based on the measurements made, the

TPU L420 calculates and registers, with

date of occurrence, the following

information:

Current peak (1 second average);

Active power peak (15 minute average);

Sum of the square current cut by the

circuit breaker in each pole;

Number of circuit breaker manoeuvres.

The high precision obtained in the

measurements generally avoids the use ofadditional transducers. All calculated

measurements are available in the local

interface or remotely through the

connection to the local area network and to

the Supervision Command and Control

System.

Analogue Comparators

Additionally to all protection and measure

functions, TPU L420 has a set of

configurable comparators for analogue

values, acquired and calculated in the

protection.

The configuration of high and low levels, as

well as the associated alarms provides the

implementation of comparison mechanismswhich are useful for the operation of the

energy system.

Load Diagram

The TPU L420 permanently calculates and

registers the daily load diagram. This

information is based on the calculation of

the 15 minute average of each of the

power measurements. All daily diagrams

can be stored for a full month.

Each diagram may be accessed locally or

through the software interface – WinProt.Data gathering is done through a serial port

or through the LAN.

Oscillography

The TPU L420 registers and stores in flash

memory a large number of oscillographies

of currents and voltages (about 60

seconds).

The length of each oscillography, the pre-

fault and post-fault times are variable and

configurable by the user. By default, the

recording starts 0.1 second before the

protection start and ends 0,1 second afterthe reset of all virtual relays of the several

functions. The maximum length is 1

second. The sampling frequency of the

analogue values is 1000 Hz.

The close of the circuit breaker also

triggers the recording of an oscillography,

and it is possible to define other logical

conditions to start this event. In particular,

there are binary inputs which may be used

for this purpose.

Unlike the load diagrams, oscillographies

can not be visualised through the relay’slocal interface. They must be visualised in

a PC, using WinProt.

Event Recorder

The TPU L420 monitors the relay’s inputs

and outputs, as well as all defined internal

logical variables. Any state change or

event is registered, with precise time

tagging (1ms resolution).

Each event may be configured to be

presented, or not, in the event recorder,

according to the desired level of detail, aswell as the associated description and the

records visualisation order. The TPU L420

stores several records in flash memory.

The storage of a new record is doneperiodically or whenever there is a

maximum number of 256 new events. Like

the other records, the event record data

can be accessed in the protection’s

interface or visualised in a PC, using

WinProt, with information gathered locally

or remotely.

Event time-tagging

The event time-tagging done by the TPU

L420 is always made in the local time zone

of the country where it is installed. For this,

it is necessary to set the deviation of the

timezone relative to the reference given by

the GMT time, as well as the day and hour

of start and end of the daylight saving

period, according to the legal regulations.

The TPU L420 receives periodically a time

synchronisation signal through the local

area network. In the absence of this signal,

an internal real time clock allows the

updating of the protection date and time

when the protection is disconnected.

Optionally, the TPU L420 can be

synchronised through an IRIG-B signal,

having a specific interface for that purpose,or trough a SNTP server, according to the

RFC 2030 standard (in versions with

Ethernet communications board).

System Information

The TPU L420 has available in real time a

large set of system information. This

information reflects the protection’s internal

status, at both hardware and software

level.

In terms of hardware it is possible to

access the status of several electronic

components, which are permanently

monitored. The information associated to

the software contains all the data regarding

the relay identification, namely relay type,

relay version, serial number, relay name,

network address, etc.

All this information can be accessed locally

or visualised in a PC, through WinProt. It

may also be reported in real time to the

Supervision Command and Control System

through the communication network.




I N T E R F A C E S

Binary Inputs and Outputs

The TPU L420’s main board has 9 binary

inputs isolated among themselves and

completely configurable. There is the

option to use two expansion boards which

can be of three types:

Board Type Inputs Outputs

Main Board 9 5+1

Type 1 Expansion 9 6

Type 2 Expansion 16 -

Type 3 Expansion - 15

On each binary input, digital filtering is

applied to eliminate the bouncing effects of

the power equipment. The logical variable

and the configuration time are configured

for each input, without loosing the right

time-tagging of the start of each state

transition.

The base version of the TPU L420 has 6

binary outputs, 5 of which are configurable.

The sixth one is a changeover output which

is activated by the internal watchdog in

case of relay failure. The configuration is

similar to the binary input configuration

previously described.

In the type 1 expansion board there are

two changeover outputs and in the type 3

expansion board there are six changeover

outputs. These outputs aim to provide a

solution for logical interlockings that require

normally closed contacts, avoiding the use

of auxiliary relays.

Serial Communication

The TPU L420 has available 3 serial ports

for communication, two in the back panel

and one in the front panel.

The front panel serial port is only used tocommunicate with the WinProt application.

In the TPU L420 version with the DNP 3.0

serial protocol, both rear ports may be

used for communication with the WinProt,

and COM1 rear port may serve as support

for the DNP 3.0 serial protocol, dispensing,

in this case, with an extra communication

board.

For the remaining protocols, the COM2

serial port may be used for communication

with the WinProt. The COM1 port isreserved for teleprotection interface.

For each back panel serial port are

available four different types of interface, at

the user’s choice, namely:

Isolated RS 232 Interface

Isolated RS 485 Interface

Glass optical fibre Interface

Plastic optical fibre Interface

Interface for Teleprotection

The TPU L420 provides two different

interfaces for Teleprotection: by digitalinputs / outputs allocation and by serial

communication by the COM1 port.

The serial communication, independently

of the physical media (optic or copper), is

asynchronous to the speed of 19200 baud,

this interface being able to be converted

externally for standardized electric media

interfaces of the X.21 or G.703 type. For

optic interface, it is also possible to use a

converter for single-mode fibre, allowing a

communication in dedicated optic fibre

between terminal units.

SCADA Integration

The integration of the TPU L420 in SCADA

systems can be done through serial

communication protocols or through

dedicated communication boards, namely:

Serial Interface supporting the DNP 3.0

protocol, with communication speeds up

to 19200 baud.

Lonworks Board, using the LONTALK

communication protocol, with a

communication speed of 1.25 Mbps.

Redundant 100 Mbps Ethernet Board,

supporting the IEC 60870-5-104 and

IEC 61850 protocols. This board also

provides the TCP/IP communication

protocol for direct connection with

WinProt.

Functional Keys

Through functional keys it is possible to

change the operation mode of the

protection, to select a specific device and

command it, or to acknowledge an alarm.

Alarms

Next to the graphic display the TPU L420

has 8 configurable alarms. For each alarm

it is possible to define an associated logical

variable, choose the alarm type and the

text presented in the display.

Graphic Display

The TPU L420 has a graphic display wherea variety of information can be presented,

namely: mimic, parameterization menus

and records menus. The mimic presents

logical information with the equipment

state, alarms description, analogue

measurements and static information.

Security

Any user can access all information in the

local interface. However, for security

reasons, without the correct password the

settings can not be accessed.




R E M O T E I N T E R F A C E – W I N P R O T 4

WinProt is a high-level software application

designed to interface with EFACEC’s

Protection and Control Units. It maycommunicate with different relays and with

different versions of the same relay. Its

architecture is based on the division of

functionalities on specialised modules,

whose access depends on the type of

relay and the type of user.

The structured storage of all the

information in a protected database is

another fundamental feature of WinProt.

Through the different modules it is possible

to execute several operations described

below.

Remote Access

WinProt allows local access by serial port

through a modem and remote access

through the local communication network

(LAN) or even through an Ethernet network

directly connected to the units. It is

possible to configure the settings

associated to each type of communication

and each specific unit.

The use of a LAN has an advantage

regarding the serial communication byallowing the access to any of the

protections in the network without having

to change physical configurations. Thus,

any operation of maintenance,

configuration or simply the system

monitoring can be remotely done from the

Supervision Command and Control

System. It also can be done through

intranet, if available.

Parameterisation Module

The parameterisation of each protection is

done through a specific module –WinSettings – where is possible to

configure function by function, to copy data

from one relay to another, to compare

settings from the database to those

existing in the relay or simply to compare

settings among different relays.

The user has a set of tools that help him

performing the parameterisation task, such

as graphics with time-current

characteristics, default settings, print

configurations, comparisons list, etc.

Logic Configuration Module

WinLogic is a friendly tool to configure the

relay’s programmable logic. This tool

allows the implementation of any type of

logical interlocking, including variable

timers.

Besides the configuration of the

connections between logical variables, the

user can also define the text associated to

each logical variable, validate the changes

made in the logical network, monitor in real

time the full network status and make the

logical simulation before downloading the

configuration to the protection. Logical

configuration complies with the IEC 61131-3 standard.




Records Analysis Module

WinProt has a specific module for

visualisation, analysis and gathering of the

records produced by the protection:

WinReports.

The analysis of each record is simplified by

the use of specifically designed graphical

tools. For example, in the oscillography the

user can zoom, see instantaneous values,

see the phasors representation, displace

the axis, etc. The load diagram and the

event recorder can also be analysed.

Mimic Configuration Module

WinProt has a module for the mimic

graphical parameterisation: WinMimic. This

tool can only be used with units with agraphic display. It allows defining the

symbolic part, the textual part and even the

measurements and states to be presented

in the protection mimic.

Together with this module it is available a

library of graphical elements with which the

user can build the unit’s mimic.

Unit Test Module

The objective of the unit test module,

WinTest, is to execute automatic tests in

the unit, without the need for externalinjection equipment such as test sets.

This module allows the simulation of

analogue values injection, the generation

of binary inputs state changes and the

monitoring of outputs operation. It is also

possible to monitor in real time every

measurement and event produced by the

relay.

Firmware Configuration Module

WinCode was designed as a WinProt

module dedicated to the relay firmwaredownload. This operation can be

performed at any time but only by

specialised technicians.




I N T E R F A C E W E B – W E B P R O T

All 420 family units offer an embedded web

server, targeted to provide, visualize and

change all the information stored in the unit.This server was conceived according to the

most recent technologies, providing all data in

XML format and providing JAVA tools (it

implies the installation of a JAVA Virtual

Machine). WebProt access is performed

through an Ethernet local area network, by

means of a standard HTML browser.

General Information

The main page presents all units’ general data,

namely, the order code, the application, the

version and the serial number. From this page,

it is possible to reach pages with morespecialized data (parameters, registers,

measures, etc.). There is also available an

access counter, a map of the accessible pages

in the server and a page with useful links

(technical support, EFACEC Web site,

e-mail, etc.).

Parameters

Through the WebProt, the user can visualize

and change several functional parameters

defined in the unit. Besides, this is subject to a

previous password insertion, for changing

purposes. It is also possible to print and exportthe complete data.

Records

WebProt allows the collection and analysis of

the different records existing in the unit

(oscillographies, event recording, load

diagrams, etc.). Concerning more complex

records, such as oscillographies, analysis tools

are downloaded directly from the server,

avoiding the need for high level specific

applications.

Schematic Diagrams

Remote monitoring of the unit’s schematic

diagram and alarm data is another feature,

available in order to allow an easy and efficient

access to the equipment state, as performed

locally.




C O N N E C T I O N D I A G R A M

B

12

IN1

34

IN2

56

IN3

78

IN4

910

IN5

1112

IN6

1314

IN7

1516

IN8

1718

IN9

BinaryInputs

BinaryOutputs

Main Card

AuxiliaryPower Supply

4

1, 2

3

COM1 COM2

RS232 GateFor WINPROT

FrontalGate

Galvanic

Isolation

5

6O1

14

16 WD

17

7

8O2

9

10O3

11

12O4

15

13 O5

IO1

IO2

IO2

18

L420

1 2 3,4,5,6 FO1

IO2

P1

Piggy-backCOM1

Piggy-backCOM2

Galvanic

Isolation

Galvanic

Isolation

FO1

Ethernet

FO2TP1TP2COM4

Lonworks

Galvanic

Isolation

Galvanic

Isolation

Communication Card

Time SynchronisationModule IRIG-BIRIG-B

1

2

COM3

GalvanicIsolation

IC

IB

IA

IN

Voltages

Currents

UC

UB

UA

34

56

78

12

34

56

12

T1

T2

UD78

9

GNDGND

10

C B A

A

BC

C B A

Expansion CardType I

9 Inputs6 Outputs

Expansion CardType II

16 Inputs

Expansion CardType III

15 Outputs

BinaryOutputs

BinaryInputs

12

IN1

.

.

.

.

.

.

.

.

.

IN8 1516

12

IN1

.

.

.

.

.

.

.

.

.

IN9 1718

34

IN9.

.

.

.

.

.

.

.

.

IN16 1718

BinaryInputs

IO4IO6

IO3IO5

IO3IO5

IO3IO5

5

6O1

7

8O2

9

10O3

11

12O4

O5

1816O6

17

15

13

14

IO4IO6

.

.

.

.

.

.

.

.

.

1

2O1

17

18O9

BinaryOutputs

6

4O11

5

9

7O12

8

12

10O13

11

15

13O14

14

18

16O15

17

O10

3

1

2

IO4IO6




C O N N E C T I O N D I A G R A M – B A C K P A N E L

D I M E N S I O N S




T E C H N I C A L S P E C I F I C A T I O N S

Frequency 50 Hz / 60 Hz optional

Rated Current 1 A / 5 A

Thermal Withstand 5 A / 15 A Continuous

100 A / 500 A for 1 s4th Input Rated Current 5 A / 1 A / 0,2 A / 0,04 A

Thermal Withstand 15 A / 5 A / 1,5 A / 0,5 A Continuous

500 A / 100 A / 20 A / 4 A for 1 s

Analogue Curren t Inputs

Burden < 0,25 VA @ In

Frequency 50 Hz / 60 Hz optional

Rated Voltage (Phase-to-Phase) 100 / 110 / 115 / 120 V

Overvoltage 1,5 Un Continuous; 2,5 Un for 10 s

Analogue Vol tage Inpu ts

Burden < 0,25 VA @ Un

Voltage Range 24 Vdc (19 - 72 Vdc)

48 Vdc (19 - 72 Vdc)

110 / 125 Vac/dc (88 - 300 Vdc/80 - 265 Vac)

220 / 240 Vac/dc (88 - 300 Vdc/80 - 265 Vac)Power Consumption 12 to 30 W / 20 to 60 VA

Power Supply

Ripple at DC Auxiliary Power Supply < 12%

Rated Voltage / Working Range 24 V (19 ... 138) V dc

48 V (30 ... 120) V dc

110/125 V (80 ... 220) V dc

220/250 V (150…300) V dc

Power Consumption 24 V < 0,05 W (1,5 mA @ 24 V dc)

48 V < 0,1 W (1,5 mA @ 48 V dc)

110/125 V < 0,2 W (1,5 mA @ 125 V dc)

220/250 V < 0,4 W (1,5 mA @ 250 V dc)

Debounce Time 1 .. 128 ms

Chatter Filter 1 .. 255

Binary Inputs

Validation Time of double inputs 1 .. 60 s

Rated Voltage 250 V ac / dc

Rated Current 5 A

Making Capacity 1 s @ 10 A; 0,2 s @ 30 A

Breaking Capacity dc : 1/0,4/0,2 A @ 48/110/220 V; L/R < 40 ms

ac : 1250 VA (250 V / 5 A); cosϕ > 0,4

Voltage between open contacts 1 kV rms 1 min

Operating Mode Pulsed / Latched

Binary Outputs

Pulse Duration 0,02 .. 5 s

Lonworks Fibre Type

Wavelength

Connector

Max. Distance

Multimode glass optical fibre

50/125 µm or 62,5/125 µm

880 nm or 1320 nm

ST

30 kmEthernet Fibre Type

Wavelength

Connector

Max. Distance


50/125 µm or 62,5/125 µm

1300 nm

ST (SC optional)

2 km

Glass optical fibre Piggy-back Fibre Type

Wavelength

Connector

Max. Distance


50/125 µm or 62,5/125 µm

820 nm

ST

1,7 km

Communication Interfaces

Plastic optical fibre Piggy-back Fibre Type

Wavelength

Max. Distance

Plastic optical fibre (POF)

1 mm

650 nm

45 m




High Voltage Test IEC 60255-5 2,5 kV ac 1 min 50 Hz

3 kV dc 1 min (power supply)

Impulse Voltage Test IEC 60255-5 5 kV 1,2/50 µs, 0,5 J

Insulation Tests

Insulation Resistance IEC 60255-5 > 100 MΩ @ 500 V dc

1 MHz Burst Disturbance Test

IEC 60255-22-1 Class III

EN 61000-4-12

2,5 kV common mode

1 kV differential mode

Electrostatic Discharge EN 61000-4-2

EN 60255-22-2 Class IV

8 kV contact; 15 kV air

Electromagnetic field EN 61000-4-3 80 MHz–1000 MHz; 10 V/m; 80% AM

900 ± 5 MHz; 10V/m; 50%; 200Hz

Fast Transient Disturbance EN 61000-4-4

IEC 60255-22-4 Class IV

4 kV 5/50 ns

Surge Immunity Test EN 61000-4-5 4/2 kV (power supply)

2/1 kV (I/O)

Conducted RF Disturbance Test EN 61000-4-6 10 V rms, 150 kHz–80 MHz

@ 1 kHz 80% am

Power Frequency Magnetic Field

Immunity Test

EN 61000-4-8 30 A/m cont; 300 A/m 3 s

Voltage Variations Immunity

Tests

EN 61000-4-11

IEC 60255-11

10 ms @ 70%; 100 ms @ 40%

1 s @ 40%; 5 s @ 0%

EMC – Immunity Tests

Interruptions in Auxiliary Supply EN 61000-4-11IEC 60255-11

5, 10, 20, 50, 100 and 200 ms

Radiated Emission

EN 55011; EN 55022 30 – 1000 MHz class AEMC – Emission TestsConducted Emission EN 55011; EN55022 0,15 – 30 MHz class A

EMC – Immunity EN 61000-6-2 : 2001

EN 50263 : 1999

EMC - Emission EN 61000-6-4 : 2001

EN 50263 : 1999

CE Marking

Low Voltage Directive EN 60950-1 : 2001

IEC 60255-5 : 2000

Vibration Tests (sinusoidal) IEC 60255-21-1 Class II

Shock and Bump Tests IEC 60255-21-2 Class II

Mechanical Tests

Seismic Tests IEC 60255-21-3 Class II

Operating Temperature Range - 10ºC to + 60ºC

Storage Temperature Range - 25ºC to + 70ºC

Cold Test, IEC 60068-2-1 - 10ºC, 72h

Dry Heat Test, IEC 60068-2-2 + 60ºC, 72h

Salt Mist Test, IEC 60068-2-11 96h

Damp Heat Test, IEC 60068-2-78 + 40ºC, 93% RH, 96h

Storage Temperature Test,

IEC 60068-2-48

- 25ºC

+ 70ºC

Degree of Protection according to EN 60529,

frontal side, flush mounted

IP54

Environmental Tests

Degree of Protection according to EN 60529, rear

side

IP20

Relative humidity 10 to 90%Environmental ConditionsTemperature - 10 ºC to 60 ºC, 40ºC damp

Weight 8 Kg

Impedance Values Primary / Secondary

Length Unit Kilometer / Mile

Line Length 1,0 .. 1000,0 (km) / 0,65..650,0 (mile)

Line Reactance 0,05 .. 500,00 Ω (In=1 A) / 0.01 .. 100.00 Ω (In=5 A)

Line Angle 30,0 .. 90,0 º

Ko Magnitude (forward, reverse and zone 1) 0,0 .. 4,0 (independent settings)

Line settings

Ko Angle (forward, reverse and zone 1) -180,0 .. 180,0 (independent settings)




Number of Protection Zones 5 independent

Tripping Characteristic Quadrilateral

Start Mode Under-impedance / Overcurrent

Reactance Reach (phase-phase loops) 0,05 .. 500,00 Ω (In=1 A) / 0.01 .. 100.00 Ω (In=5 A)

Resistance Reach (phase-phase loops) 0,05 .. 500,00 Ω (In=1 A) / 0.01 .. 100.00 Ω (In=5 A)

Reactance Reach (phase-earth loops) 0,05 .. 500,00 Ω (In=1 A) / 0.01 .. 100.00 Ω (In=5 A)

Resistance Reach (phase-earth loops) 0,05 .. 500,00 Ω (In=1 A) / 0.01 .. 100.00 Ω (In=5 A)

Reactance Overreach Zone 1 (phase-phase loops) 0,05 .. 500,00 Ω (In=1 A) / 0.01 .. 100.00 Ω (In=5 A)

Reactance Overreach Zone 1 (phase-earth loops) 0,05 .. 500,00 Ω (In=1 A) / 0.01 .. 100.00 Ω (In=5 A)

Phase-phase Loops Time Delay 0,0 .. 60,0 s (independent for each zone)

Phase-earth Loops Time Delay 0,0 .. 60,0 s (independent for each zone)

Tripping Characteristic Angle – Forward 30,0 .. 90,0 º

Tripping Characteristic Angle – Reverse 30,0 .. 90,0 º

Directional Characteristic Angles 0,0 .. 60,0º

Min. Resistance – Load Characteristic 0,05 .. 500,00 Ω (In=1 A) / 0.01 .. 100.00 Ω (In=5 A)

Angle – Load Characteristic 10.0 .. 60.0 º

Min. Operational Current 0,20 .. 4,0 pu

Min. Residual Current - phase-earth loop selection 0,10 .. 4,00 pu

Min. Residual Voltage - phase-earth loop selection 0,005 .. 0,80 pu

Operational Current – Overcurrent Start 0,20 .. 10,00 pu

Time Delay – Overcurrent Start 0,00 .. 60,00 s

Min. Operating Time < 35 ms (with SIR =1 and Xdef < 0,75 Xop)Timer Accuracy 3%±10ms

Impedance Accuracy 5% of Zn

Reset Ratio – Impedance 1,05

Reset Ratio – Overcurrent 0,96

Reset Ratio – Earth Overcurrent 0,96

Distance Protection

Reset Ratio – Earth Overvoltage 0,96

Power Swing Blocking Independent of the Distance Protection’s step

Reset time 0,1 .. 10 sPower Swing Blocking / Out of StepTripping

Out of step tripping Active/Inactive

Activation Time 0,04 .. 60,0 s

Operacional current 0,20 .. 40,0 pu

Current Accuracy 3% (minimum 3% In)

Min. Operating Time < 30 ms

Switch-On-To-Fault Protection

Reset Ratio 0.96

Operational Current 0,2 .. 40 pu

Time Delay 0 .. 60 s

Min. Operating Time 30 ms (with I ≥ 2 Iop)

Timer Accuracy ± 10 ms


Reset Ratio 0,95

High Set Overcurrent Protection forPhase to Phase Faults

Max. Reset time 30 ms

Curves NI, VI, EI, LI of IEC standard

NI, VI, EI, LI of IEEE standard


Temporisation 0,04 .. 300 sTM regulation 0,05 .. 1,5

Timer Accuracy ± 10 ms (definite time)

3% or ± 10 ms (inverse time)


Start Value of Inverse Time Protection 1,2 Iop

Reset Ratio 0,96

Definite/Inverse Time Low SetOvercurrent Protection for Phase toPhase Faults

Max. Static Reset Time 30 ms


Time Delay 0,04 .. 300 s



Reset Ratio 0,96

Definite Time Universal OvercurrentProtection for Phase to Phase Faults

Max. Reset Time 30 ms









Reset Ratio 0,95

High Set Overcurrent Protection forPhase to Earth Faults






TM regulation 0,5 .. 15





Reset Ratio 0,96

Definite/Inverse Time Low SetOvercurrent Protection for Phase toEarth Faults


Operational Current 0,1 .. 40 puTime Delay 0,04 .. 300 s



Reset Ratio 0,96

Definite Time Universal OvercurrentProtection for Phase to Earth Faults


Available Phase Relations 30º .. 60º (forward/reverse)Directional Phase Fault ProtectionMemory duration after voltage drop 2,5 s

Available Phase Relations -90º .. 90º (forward/reverse)Directional Earth Fault ProtectionMin. Zero sequence Voltage 0,005.. 0,8 pu

Time Delay 0,0 .. 10,0 sRemote Tripping


Schemes DUTT / PUTT / POTT / POTT + DCUB / DCB

Line Configuration 2 terminals / 3 terminals

Send Time 0,0 .. 10,0 s

Lock Time – DCB 0,02 .. 10,0 s

Security Time – DCUB 0,02 .. 10,0 s

Lock Time – DCUB 0,02 .. 10,0 s

Failure Time – DCUB 0,05 .. 0,0s

Confirmation Time – Transient Lock 0,02 .. 10,0 s

Lock Time – Transient Lock 0,02 .. 10,0 s

Distance Protection TeleprotectionSchemes


Schemes POTT / POTT + DCUB / DCB

Line Configuration 2 terminals / 3 terminals

Send Time 0,0 .. 10,0 s

Lock Time – DCB 0,02 .. 10,0 s

Security Time – DCUB 0,02 .. 10,0 s

Lock Time – DCUB 0,02 .. 10,0 s

Failure Time – DCUB 0,05 .. 60,0s

Confirmation Time – Transient Lock 0,02 .. 10,0 s

Lock Time – Transient Lock 0,02 .. 10,0 s

Directional Earth Fault Protection

Teleprotection Schemes


Operating mode Echo / Echo + Tripping

Confirmation time 0,02 .. 10,0 s

Echo emission time 0,0 .. 10,0 s

Operational voltage (distance) 0,20 .. 1 pu (VREF = VPFASE-EARTH)

Operational voltage (earth directional) 0,05 .. 0,8 pu (VREF = VRESIDUAL)

Voltage precision 2 %

Echo and Weak End Infeed Logi c

Time precision ± 10 ms









Reset Ratio 0,95

High Set Phase Balance Protection






TM Regulation 0,5 .. 15





Reset Ratio 0,96

Definite/Inverse Time Low Set PhaseBalance Protection


Maximum Number of Cycles 5Dead Time 0,1 .. 60 s

Reclaim Time 1 .. 60 s

Automat ic Reclosing

Circuit Breaker Manoeuvre Time 0,05 .. 60 s

Asymmetrical Failure Detection Mode Zero or negative sequence

Operational Residual Voltage 0,05 .. 0,50 pu

Operational Residual Current 0,10 .. 1,00 pu

Operational Negative Voltage 0,05 .. 0,80 pu

Operational Negative Current 0,10 .. 1,00 pu

Operational Three-phase Voltage 0,005 .. 1,00 pu

Operational Delta Current 0,10 .. 1,00 pu

Lock Time after Line Energisation 0,05 .. 60 ,0 s

Min. Current 0,10 .. 1,00 pu

Current Accuracy 3% (of In)

Voltage Accuracy 2% (of Un)

Voltage Transformer Supervision


Operation Mode Manual / Automatic (independent)

Closing Mode OFF / LLLB / DLLB / LLDB / DLDB / Release

(independent for each operation mode)

Bus Voltage Selection A / B / C / AB / BC / CA

Bus/Line Voltage Ratio 0,10 .. 10,0 pu

Bus Voltage Angle -180,0 .. 180,0 º

Dead Line Voltage 0,05 .. 0,80 pu

Live Line Voltage 0,20 .. 1,20 pu

Max. Voltage 0,50 .. 1,50 pu

Min. Frequency 47,0 .. 50,0 Hz (rated frequency = 50Hz)

57,0 .. 60,0 Hz (rated frequency = 60Hz)

Max. Frequency 50,0 .. 53,0 Hz (rated frequency = 50Hz)

60,0 .. 63,0 Hz (rated frequency = 60Hz)

Voltage Difference 0,01 .. 0,50 pu (independent for each mode)

Frequency Difference 0,02 .. 4,00 Hz (independent for each mode)

Phase Difference 2,00 .. 60,0 º (independent for each mode)

Command Time 0,0 .. 600,0 s (independent for each mode)

Confirmation Time 0,0 .. 60,0 s (independent for each mode)


Voltage Accuracy 0,5%

Frequency Accuracy 20 mHz

Synchronism and Voltage Check

Angle Accuracy 2º




Time Delay 0,05 .. 10 sBreaker Failure ProtectionConfirmation Time of Trip Circuit Failure 0,05 .. 10 s

Detection Criteria Current and Voltage/Current and CB Status

Min. Operational Current 0,10 .. 1,00 pu

Min. Operational Voltage 0,05 .. 1,00 pu

Confirmation Time 0,04 .. 1,00 sCurrent Accuracy 3%

Voltage Accuracy 2%

Dead Line Detection


Open Confirmation Time 0,05 .. 60 sCircuit B reaker and DisconnectorSupervision Close Confirmation Time 0,05 .. 60 s

Currents 0,5 % In

Voltages 0,5 % Vn

Power 1 % Sn

Frequency 0,05 % f n

Measurement Accuracy

Impedances 1 % Zn

Accuracy 2 % (Line Length), minimum 0,1Ω (sec)Fault LocatorMax. Number of Fault Records 10 (in non-volatile memory)

Resolution 1 ms

Maximum Number of Events per Register 256Chronological Event Recorder

Number of Recorded Events > 28000

Sampling Frequency 1000 Hz@ 50HzOscillographyTotal Time Recorded 60 sec

Configurable Settings High Level Value

Low Level Value Analogue Comparators

Timer Accuracy 1 s

Measurements P, QLoad DiagramTotal Time Recorded 1 month

SNTP servers number 2

Server requested time 1 .. 1440 min

Maximum variation 1 .. 1000 ms

Packages minimum number 1 .. 25

Server timeout 1 .. 3600 s

SNTP Synchronization

Functioning mode Multicast/Unicast




V E R S I O N S

VERSION

AVAILABLE FUNCTIONS L420 – D L420 – R L420 – S

Distance Protection (21/21N) ♦ ♦ ♦

Power Swing Blocking / Out of Step Tripping (78) ♦

Switch-On-To-Fault Protection (50HS) ♦ ♦ ♦

Phase Overcurrent Protection (50/51) ♦ ♦ ♦

Earth Fault Overcurrent Protection (50/51N) ♦ ♦ ♦

Directional Phase Fault Overcurrent (67) ♦ ♦

Directional Earth Fault Overcurrent (67N) ♦ ♦ ♦

Distance Protection Teleprotection Schemes (85/21) ♦ ♦ ♦

Directional Earth Fault Protection TeleprotectionSchemes (85/67N)

♦ ♦ ♦

Echo and Weak End Infeed Logic (27WI) ♦

Remote Tripping ♦ ♦ ♦

Phase Balance Protection (46) ♦ ♦

Automatic Reclosing (79) ♦ ♦

Synchronism and Voltage Check (25) ♦ ♦

VT Supervision ♦ ♦ ♦

Circuit Breaker Failure (62BF) ♦ ♦ ♦

Trip Circuit Supervision (62) ♦ ♦ ♦

Protection Trip Transfer (43) ♦ ♦ ♦

Dead Line Detection ♦ ♦ ♦

Circuit Breaker and Disconnector Supervision ♦ ♦ ♦

Programmable Logic ♦ ♦ ♦

Distributed Automation ♦ ♦ ♦

Oscillography ♦ ♦ ♦

Event Chronological Recorder ♦ ♦ ♦

Fault Locator ♦ ♦ ♦ Analogue Comparators ♦ ♦ ♦

Load Diagram ♦ ♦ ♦

The TPU L420-D is suitable for less integrated applications, with specific equipment for execution of automatic reclosing and synchronism

check functions. These functions are available in other two TPU L420’ versions.




O R D E R I N G F O R M

TPU L420 – Ed1 - - - - - - - - - - - - -

Version

TPU L420 – D DTPU L420 – R RTPU L420 – S S

Rated current on phase current transformers

1 A 1A5 A 5A

Rated current o n 4th input current

0,04 A 0,04A0,2 A 0,2A1 A 1A5 A 5A

Rated voltage on in put voltage (VPHASE-TO-PHASE)

100 V 100V110 V 110V115 V 115V120 V 120V

Rated volt age on 4th

input vol tage (VPHASE-TO-PHASE) 100 V 100V110 V 110V115 V 115V120 V 120V

Frequency

50 Hz 50Hz60 Hz 60Hz

Power Supply Nominal Value 24 Vdc A48 Vdc B110/125 Vdc/Vac C220/240 Vdc/Vac D

Expansion Board I/O 1

Absent 0Type 1 - 9 Inputs + 6 Outputs 1Type 2 - 16 Inputs 2Type 3 - 15 Outputs 3

Expansion Board I/O 2 Absent 0Type 1 - 9 Inputs + 6 Outputs 1Type 2 - 16 Inputs 2Type 3 - 15 Outputs 3

Communication Protocols

Absent 0Serial DNP 3.0 DNPLonworks with optical interface, without Auto Power Supply LON1Lonworks with optical interface, with Auto Power Supply LON2Lonworks with twisted-pair interface, without Auto Power Supply LON3Lonworks with twisted-pair interface, with Auto Power Supply LON4

IEC 60870-5-104 over Ethernet 100BaseTx redundant ETH1IEC 60870-5-104 over Ethernet 100BaseFx redundant ETH2IEC 61850 over Ethernet 100BaseTx redundant 850TIEC 61850 over Ethernet 100BaseFx redundant 850F

Serial Interface Port 1

RS 232 (by default) 0RS 485 1Plastic Optical Fibre 2Glass Optical Fibre 3 Serial Interface Port 2 RS 232 (by default) 0RS 485 1Plastic Optical Fibre 2Glass Optical Fibre 3 Language

Portuguese PTEnglish UKFrench FRSpanish ES



N O T E S

Main Address

EFACEC Engenharia, S.A.

Rua Eng. Frederico Ulrich, 4471-907 Moreira Maia, Portugal | Tel. +351 22 940 20 00 | Fax +351 22 940 33 09 | E-mail: [email protected] | Web: www.efacec.com

Due to the continuous development, data may change without notice.

Not valid as a contractual document.

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