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Module 10B:
Transformer Protection
Power Automation 2
Power Transmission and Distribution
Power AutomationProgress. Its that simple.
FACTS
SITRAM+SiemensTransformerMonitoringSystem forall voltagelevels
Generatortransformer
Systeminterconnectingtransformer
Shunt reactor
Oil-immerseddistribution transformer
GEAFOLcast-resin transformer
Tractiontransformer
HVDC
Systemtransformer
Convertertransformer
Furnacetransformer
Voltageregulator
TLM50+SiemensTransformerLifeManagementProgram
Commissioning and operating aids (4 of 5)
06 BB TLM .ppt01 About us1.ppsPower Automation 3
Power Transmission and Distribution
Power AutomationProgress. Its that simple.
575-MVA Phase Angle Regulator (PAR)Transformer Set in the 345 kV Station
Power Automation 4
Power Transmission and Distribution
Power AutomationProgress. Its that simple.
630-kVA Oil-Immersed DistributionTransformers, TUMETIC, TUNORMA
Power Automation 5
Power Transmission and Distribution
Power AutomationProgress. Its that simple.
Transformer Prices
>40 MVA
10,-US$ pro kVA =>
30MVA = 40.000 kVA *10 US$ = 300.000US$
>200 MVA
8,-US $ pro kVA =>
200 MVA 200.000kVA *8 US$ = 1600.000US$
>1000 MVA
5,-US$ pro kVA =>
1000 MVA 1000.000kVA *5 = 5000.000 US$
Power Automation 6
Power Transmission and Distribution
Power AutomationProgress. Its that simple.
On-site servicesand repair
SITRAD Condition assessment program
SITRAM+ transformermonitoring system
Traditional heat andvacuum treatment
SIDRY, SMART DRY,SIREC advanced lifeextension programs
TLM50+ Siemens Transformer Life Management Program
Power Automation 7
Power Transmission and Distribution
Power AutomationProgress. Its that simple.
Transformer Faults
Power Automation 8
Power Transmission and Distribution
Power AutomationProgress. Its that simple.
The 7UT6 Family
7UT612: for two end protection objects (1/3 x 19 housing 7XP20)
7UT613: for three end protection objects (1/2 x 19 housing 7XP20)
7UT633: for three end protection objects (1/1 x 19 housing 7XP20)
7UT635: for five end protection objects (1/1 x 19 housing 7XP20)
SIPROTEC 4
7UT6 differential protection relay for transformers,
generators, motors and busbars
Power Automation 9
Power Transmission and Distribution
Power AutomationProgress. Its that simple.
Hardware options
7UT612
7 (7)*
1
---
3
4
1
4 lines
7UT613
11 (6)*
1**
3 / 1
5
8
1
4 lines
7UT633
11 (6)*
1**
3 / 1
21
24
1
Graphic
Device
Current Inputs (normal)
Current Inputs (sensitive)
Voltage Inputs (Uph / UE)
Binary Inputs
Binary Outputs
Life contact
LC Display
7UT635
14 (12)*
2**
---
29
24
1
Graphic
* 1A, 5A, (1A, 5A, 0.1A) changeable (jumper position)
** changeable normal or sensitive (jumper position)
Power Automation 10
Power Transmission and Distribution
Power AutomationProgress. Its that simple.
Scope of functions and Protection objects
Function ANSI No.
Differential 87T/G/M/L
Restricted Earth fault 87 N
Overcurrent-time, phases 50/51
Overcurrent-time, 3I0 50N/51N
Overcurrent-time, earth 50G/51G
Overcurrent-time, single phase
Negative sequence 46
Overload IEC 60255-8 49
Overload IEC 60354 (hot spot) 49
Overexcitation V/Hz 24
Breaker failure 50BF
External temperature monitoring 38
Lockout 86
Measured value supervision
Trip circuit supervision 74TC
Direct coupling
Operational measured values
Protection Objects
Three-phase transformer
Single-phase transformer
Auto-transformer
Generator / Motor
Busbar, 3-phase (Branch point)
Busbar, 1-phase
Power Automation 11
Power Transmission and Distribution
Power AutomationProgress. Its that simple.
Cross reference - functions and protected objects
Protection functions ANSI No. Transf.
3-phase
Transf.
1-phase
Auto-
transf.
Gen. /
Motor
Busbar
3-phase
Busbar
1-phase
Differential 87T/G/M/L X X X X X X
Restricted Earth Fault 87 N X X --- X --- ---
Overcurrent-time, phases 50/51 X X X X X ---
Overcurrent-time, 3I0 50N/51N X --- X X X ---
Overcurrent-time, earth 50G/51G X X X X X X
Overcurrent-time, single phase X X X X X X
Negative sequence 46 X --- X X X ---
Overload IEC 60255-8 49 X X X X X ---
Overload IEC 60354 49 X X X X X ---
Overexcitation V/Hz *) 24 X X X X X X
Breaker failure 50 BF X X X X X ---
External temperature monitoring
(thermo-box)
38 X X X X X X
Lockout 86 X X X X X X
Measured value supervision X X X X X X
Trip circuit supervision 74TC X X X X X X
Direct coupling 1 X X X X X X
Direct coupling 2 X X X X X X
Operational measured values X X X X X X
X Function applicable ; --- Function not applicable ; *) only 7UT613 / 633
Power Automation 12
Power Transmission and Distribution
Power AutomationProgress. Its that simple.
Communication features
Front interface
DIGSI4
WEB Monitor
Service interface (s)
DIGSI4 operation
modem connection
RTD box
Flexibility due to plug in modules
Compatibility to international standards
System interface
IEC60870-5-103
Profibus FMS
Profibus DP
DNP3.0
Modbus ASCII/RTU
Time synchronising
IRIG-B (GPS)
DCF77
RS232/RS485 electrical module
Fibre-optic module
Optical double-ring module
Power Automation 13
Power Transmission and Distribution
Power AutomationProgress. Its that simple.
Connection Example
direct connection to themain Cts
no matching transformers /no matching connections
numerical vector groupadaptation without zero sequence current correctiondepending of the type ofearthing of the winding.
increased sensitivity by 33%by measuring of the zerosequence current (7UT6) forsingle-pole faults.
1A/5A main Cts adaptationin the relay
permissible ratio Ct nominalcurrent to transformer nominalcurrent up to 1 : 4
IL2M1
IL1M3
IL2M2
IL3M2
IL2M3
IL3M1
IL3M3
IL1M2 IL1M1IX1 IX3
7UT613
M1
M3
M2 side 1side 2
side 3
Surfacemountinghousing
Flush/cubicle-mountinghousing
L1
L2
L3
L1
L2
L3
L1
L2
L3
Power Automation 14
Power Transmission and Distribution
Power AutomationProgress. Its that simple.
Application: 3-winding transformer YNd5d11 (1 of 4)
M1
400/1A
M2
400/1A
M3 400/1A
M4
8000/1A
M5
3500/1ASide 1
Side 2
Side 3
IL1M1/I1
IL2M1/I2
IL3M1/I3
IL1M2/I4
IL2M2/I5
IL3M2/I6
IL1M3/I7
IL2M3/I8
IL3M3/I9
IL1M4/I10
IL2M4/I11
IL3M4/I12
IL1M5/Ix1
IL2M5/Ix2
IL3M5/Ix3
Ix4
7UT635
M1
M2
M4
M5
M3
200/1A
Power Automation 15
Power Transmission and Distribution
Power AutomationProgress. Its that simple.
Application: 3-winding transformer YNd5d11 (2 of 4)-Device Configuration and Power System Data 1
7UT635
Power Automation 16
Power Transmission and Distribution
Power AutomationProgress. Its that simple.
Application: 3-winding transformer YNd5d11 (3 of 4)-continue Power System Data 1
7UT635
Power Automation 17
Power Transmission and Distribution
Power AutomationProgress. Its that simple.
Application: 3-winding transformer YNd5d11 (4 of 4)-continue Power System Data 1
7UT635
Power Automation 18
Power Transmission and Distribution
Power AutomationProgress. Its that simple.
Application: Autotransformer with Winding (1 of 2)
7UT613
M1
M2
M3
IL1M2
IL2M2
IL3M2
IL1M1
IL2M1
IL3M1
IL1M3
IL2M3
IL3M3
Side 3Side 1
Side 2
Power Automation 19
Power Transmission and Distribution
Power AutomationProgress. Its that simple.
Application: Autotransformer with Winding (2 of 2)- Power System Data 1
7UT613
Power Automation 20
Power Transmission and Distribution
Power AutomationProgress. Its that simple.
Application: Autotransformer with Winding (2 of 2)- Power System Data 1
Power Automation 21
Power Transmission and Distribution
Power AutomationProgress. Its that simple.
Application: Autotransformer (bank) with (1 of 2)3 Cts at the star point side available
M1
M2
M3
7UT613
Only compensation winding,
no external connection!
Increased sensitivity for
phase to phase- and
phase to ground faults
towards the star point!
Power Automation 22
Power Transmission and Distribution
Power AutomationProgress. Its that simple.
Application: Autotransformer (bank) with (2 of 2)3 Cts at the neutral side
7UT613
Power Automation 23
Power Transmission and Distribution
Power AutomationProgress. Its that simple.
Application: Single-phase bus bar (1/2)- Phase selective configuration (1 7UT6 for 1 phase)
7UT612:
7 current-
inputs
7UT613/633:
9 current-
inputs
7UT635:
12 current-
inputs
7UT612
Power Automation 24
Power Transmission and Distribution
Power AutomationProgress. Its that simple.
Application: Single-phase bus bar (2/2)- Phase selective configuration (1 7UT6 for 1 phase)
2 more Relays
for Phase 2 and 3
are necessary
7UT612
Power Automation 25
Power Transmission and Distribution
Power AutomationProgress. Its that simple.
Application: Single-phase bus bar (1 of 2)- configuration with Summation Cts
7UT612:
7 current-
inputs 0.1A
7UT613/633:
6 current-
inputs 0.1A
7UT635:
12 current
inputs 0.1A
7UT612
*) Summation CT
4AM5120-3DA00-0AN2: 1/0.1A
4AM5120-4DA00-0AN2: 5/0.1A
7UT612
Power Automation 26
Power Transmission and Distribution
Power AutomationProgress. Its that simple.
Application: Single-phase bus bar (2 of 2)- configuration with Summation Cts
Not important
in this case
7UT612
Power Automation 27
Power Transmission and Distribution
Power AutomationProgress. Its that simple.
General Applications (1 of 2)
1 C.B. application withtwo winding transformer
7UT613
7UT633
Three winding transformer1 or 3 phases
7UT613
7UT633
Short lines(2 ends)
7UT612
Short lines(3 ends)
7UT613
7UT633
Two winding transformer1 or 3 phases
7UT612
7UM62
1 C.B. application onHV and LV side with
two winding transformer
7UT635
Power Automation 28
Power Transmission and Distribution
Power AutomationProgress. Its that simple.
General Applications (2 of 2)
Unit Protection(Overall Differential)
Y
G
3~
7UT635
Generator/Motor longitudinal ortransversal differential protection
7UT612
7UM62
G/M
3~
High-impedanceRestricted Earth Fault Protection
IEE input
of the unit
7UT6xx
Power Automation 29
Power Transmission and Distribution
Power AutomationProgress. Its that simple.
Differential functions IDiff> and IDiff>>
IDiff> restrained (biased) differential function, IDiff> = f(IRest)
- Ct-saturation detector (add on stabilization) for external faults.
IDiff>> fast unrestrained high current differential function, its setting therefore should be higher then
the maximum possible through flowing current! Example Transformer: IDiff>> > (1/uk)InO
This function will be not blocked by harmonics due to an inrush or Ct-saturation!
The IDiff>> stage evaluates the fundamental wave of the currents as well as the instantaneous values.
- Fundamental wave processing: fast tripping at the set threshold.
- Instantaneous value processing: ensures fast tripping even in case the fundamental wave
of the current is strongly reduced by Ct-saturation. Because of the possible DC offset after fault
inception, the instantaneous value stage operates only above twice the set threshold.
IDiff>>
2IDiff>>
IDiff> IRest
IDiff
IDiff
iDiff
&Trip
IDiff>
1Trip
IDiff>>
Instantaneous
values
fundamental wave:
IDiff = rms(iDiff)50Hz
iRest = i1 + i2rectified mean value:
IRest = iRest
measured valuepre-processing
( vector gr. ,Cts )
side 1i1L
i2Lside 2 iDiff = i1 + i2
Tripping characteristic,saturation detection
iRest IRest
msI / In
O
iDiffIDiff
ms
I / In
O
analysing of harmonics:-block by 2. & 3. or 5.har-cross block
Motor start
DC off set
Power Automation 30
Power Transmission and Distribution
Power AutomationProgress. Its that simple.
Tripping Characteristic Reasons for this shape of characteristic
2.0 8.0 9.0
3.0
InOIRest
InO
IDiff
7.0
2.5
Slope 1
Slope 2
IDiff>
01.0 4.0 5.03.0 6.00
1.0
0.5
2.0
1.5
x
Trip
Block
Total
CT-
error
Tap-
changer
Magnet.
current
Example: Transformer with Tap changer
Power Automation 31
Power Transmission and Distribution
Power AutomationProgress. Its that simple.
Tripping Characteristic (1 of 2)
flexible adaptation to various transformers, e.g. with tap changer or different Cts
high stability against external faults with Ct saturation
IDiff>>: fast tripping for solid short-circuits within one period
20
4 8 106 120
2
1
4
3
6
7
1614
5
Tripping Characteristic 7UT6
Trip Block
1231 IDiff>>
1244A
BASE POINT 2
1241A
SLOPE 1
1243A
SLOPE 2
1221 IDiff>
Add-on
Stabilization
45
InO
IRest
InO
IDiff
1256A
I-ADD ON STAB
1242A
BASE POINT 1
*)
*) Slope for Add-on Stabilization:
7UT6 Slope 1 ; 7UT5 Slope 1
Power Automation 32
Power Transmission and Distribution
Power AutomationProgress. Its that simple.
Tripping Characteristic (2 of 2) - Parameters
7UT613 / 63x
min. setting:
7UT6: 3 ; 7UT5: 5
7UT6 only
7UT6: settable
7UT5: 0 (fixed)
Power Automation 33
Power Transmission and Distribution
Power AutomationProgress. Its that simple.
Tripping Characteristic - Pickup of differential function
For triggering of internal tasks, events and fault records the differential protection function needs a pickup information. This pickup becomes active, if the differential current or the restraint current is over an internal threshold(dotted line). Each external large current leads to a pickup.
Pickup doesnt always mean internal failure!
Power Automation 34
Power Transmission and Distribution
Power AutomationProgress. Its that simple.
Tripping Characteristic (1 of 2) - Add on stabilization during external fault
Immediately after fault inception (A) the fault currents increase severely thus producing a high
restraint quantity. At the instant of Ct saturation (B) a differential quantity is produced and the restraint
quantity is reduced. In consequence, the operating point IDiff/IRest may move into the tripping area (C).
In contrast, the operating point moves immediately along the fault characteristic (D) when an internal
fault occurs.
When an external fault is detected, the differential stage for this phase is blocked by an
adjustable no. of periods. (for 7UT613/63x now also cross block is possible)
During an external fault which
produces a high
through-flowing current,
causing Ct saturation,
a considerable differential-
current can be simulated,
especially when the degree of
saturation is different at the
two sides.
If the quantities IDiff/IRest result
in an operating point which
lays in the trip area of the
operating characteristic, a
trip signal would be the
consequence, if there were no
special measures0A
2 4 8 106 120
2
1
4
3
Tripping Characteristic 7UT6
Trip
6
7
16
IDiff>>
14
5
IDiff>
Add-on
Stabilization
45
InO
IRest
InO
IDiff
Block
Saturation inceptionB
D
C
Power Automation 35
Power Transmission and Distribution
Power AutomationProgress. Its that simple.
Tripping Characteristic (2 of 2)- Demonstration of add-on stabilization
add-on
stabilisati
on
45
Block
Trip
Power Automation 36
Power Transmission and Distribution
Power AutomationProgress. Its that simple.
Tripping Characteristic - Motor Start
Typical for motor start is the starting current and the superimposed dc component witha large time constant. The two Ct-sets may transform this dc component differently.The result is a differential current and the risk of an over-function is given.
Detection of motor starting:Increases the pick-up values for a settable time
Criterion:Supervision of restraint current
IRest > I-Restr. Startup(until 2 I/InO)
than the Start-Factor (max. 2)is active for the time:
T Start Max(Duration of dynamical increasing of pickup)
20
4 8 106 120
2
1
4
3
Tripping Characteristic 7UT6 for Motor start
Trip
Block
6
7
16
1231 Idiff>>
14
5
Steady-state
characteristic
1221 Idiff>
45
InO
IRest
InO
IDiff
Start-up characteristic
Increase
of pickup
Power Automation 37
Power Transmission and Distribution
Power AutomationProgress. Its that simple.
Tripping Characteristic DC offset: Increasing of the Characteristic
0.12
0.24
0.18
0.36
Minimum
setting
Add-on
stabilization
Setting Add-on stabilization:
5
7UT613/63x only
Steady state
characteristic
increased
characteristic
(factor 2)
Power Automation 38
Power Transmission and Distribution
Power AutomationProgress. Its that simple.
Inrush, cross block, over excitation [V/Hz] (1 of 2)
recognise inrush condition by evaluating the ratio 2nd harmonic I2har to basic wave IDiff.
Time limit for cross-block. Reliable reaction to the inrush condition with cross-block.Trip of a short circuit after the set time delay.
recognise over excitation [V/Hz] by evaluating the ratio 3rd or 5th harmonic to basic wave
Cross-block = Yes (blocking of all phases)
O R1
L1-block
L2-block
L3-block
IDiff > trip blocking
for an adjustable time
filter window1 cycle
t1P 2P 3P
iRUSH = iDiff Inrush current
in one phase
Setting
value
t
15 %
no block
blockDiff
2har
I
I
00
L1-block
L2-block
L3-block
Cross-block = No (phase separate blocking)
IDiff, L1 > trip blocking
IDiff, L2 > trip blocking
IDiff, L3 > trip blocking
Power Automation 39
Power Transmission and Distribution
Power AutomationProgress. Its that simple.
Inrush, cross block, over excitation [V/Hz] (2 of 2)Demo: Inrush followed by an internal Fault L1-E
3 cycles
Inrush
Internal
fault
IDiff>>
Add-on
stabilizati
onIDiff>
Power Automation 40
Power Transmission and Distribution
Power AutomationProgress. Its that simple.
Low impedance Restricted Earth Fault (REF) (1 of 2)
The REF measures the Neutral current of the object ( ISP = 3I0 ) and, depending on the
angle () between 3I0 and the also measured sum of the phase currents
( 3I0 = IL1 + IL2 + IL3 ), decides for internal or external fault.
The sensitivity of the REF is almost independent from the load of the object.
(The sensitivity of the Differential Function especially for high ohm faults will be
reduced by the load due to the slope of its Tripping Characteristic ).
The REF can be stetted to 0.1 I/INO (min. 0.05) and is therefore more sensitive as the
Differential Protection (even without load).
Power Automation 41
Power Transmission and Distribution
Power AutomationProgress. Its that simple.
Low impedance Restricted Earth Fault (REF) (2 of 2)
calculation of the basic wave and the complex vectors of I0' and I0"
evaluation of the modulus and angle between I0' and I0"
sensitive fault detection starting with 5% transformer nominal current
90 0
basic Trip-Area180 > 90
extended Trip-Area
-0.1-0.2-0.3 +0.3+0.1 +0.2
1
2
3
4
0.0
REF
REF
I
I
'
0
''
0 3I3I
Tripping
Blocking
Char. for
= 180
Tripping Characteristic REF
2) for extended Trip-Area (90 180):
IREF> = Setting value (Trip Threshold)
IRest = Restraint current
IREF = 3I0
1) for basic Trip-Area (0 90):
IREF = 3I0 and must be IREF>
Characteristic_1): IREF / IREF> = 1
(no restraining current IRest effective)
Characteristic_2): IREF = IREF> + kIRest
where IRest = (3I0-3I0-3I0+3I0)
IRest includes the direction
Power Automation 42
Power Transmission and Distribution
Power AutomationProgress. Its that simple.
CT Requirements (1 of 3)
Request:
where:kALF_N = rated Accuracy Limiting Factor kALF = actual Accuracy Limiting Factor
Rct = secondary winding resistance
Rb = rated resistive burden Rb = actual resistive burden
IP = max. primary symmetrical short circuit current TP = Primary (Net-) Time constant
100msT:forI
I5
RR
RRkk
100msT:forI
I4
RR
RRkk
P
NCtPrim
P
'
bct
bctALF_NALF
P
NCtPrim
P
'
bct
bctALF_NALF
0.1
0.1
38.1 MVA
110/11 kV
uk = 10%
200/1A
5P20,15VA
Rct = 1
50m , 4 mm2
80m , 2.5 mm2
110 kV
Example: (TP 100ms)
2000/1A
10P10, 10VA
Rct = 2
11 kV
7UT6
Wind.1
Wind.2
Explanation:
5P20: kALF_N = 20
Power Automation 43
Power Transmission and Distribution
Power AutomationProgress. Its that simple.
CT Requirements (2 of 3)
200A110kV3
38100kVA
U3
SInO
N1
N1
2200A100%10%
200A1.1100%
u
InOcI
k
1P_1
151A
15VA
I
SR
22
NCtS
bb
1.220.12.5mm
m
mm0.0175160m
Rq
l2R
2
2
Relay
'
b
1441.221
15120kALF
Side 2 (LV):
2000A11kV3
38100kVA
U3
SInO
N2
N2
22000A100%10%
2000A1.1100%
u
InOcI
k
2P_2
101A
10VA
I
SR
22
NCtS
bb
47.20.542
10210kALF
Side 1 (HV):
0.540.14mm
m
mm0.0175100m
Rq
l2R
2
2
Relay
'
b
Maximum through flowing current: Maximum through flowing current:
OK!44200A
2200A4
I
I4144k
NCTprim
PALF OK!44
2000A
22000A4
I
I447.2k
NCTprim
PALF
where: c = factor for max. possible over voltage where: c = factor for max. possible over voltage
Nominal transformer current: Nominal transformer current:
Power Automation 44
Power Transmission and Distribution
Power AutomationProgress. Its that simple.
CT Requirements (3 of 3)
5P20, 200/1A, 15VA, Rct = 1, Rb = 1.22, 11I/INCT ; TP = 100ms
10P10, 2000/1A, 10VA, Rct = 2, Rb = 0.54, 11I/INCT ; TP = 100ms
Power Automation 45
Power Transmission and Distribution
Power AutomationProgress. Its that simple.
Commissioning and operating aids (1 of 4)
WEB-Technology
The homepage of the relayis:http://141.141.255.160IP-address is set with DIGSI 4on front- or rear service port
WEB server in the relays firmware
Server sends its HTML-pages and JAVA-code to the WEB Monitorafter a DIAL-UP connection
2. HTML page view in a WEB Monitorwith the IP-address of the relayhttp://141.141.255.160
Help system in INTRANET / INTERNEThttp://www.siprotec.com
1. Serial connection
Direct or via modem with a
standard DIAL-UP Network
Access to the relay with a WEB Monitor
Power Automation 46
Power Transmission and Distribution
Power AutomationProgress. Its that simple.
Commissioning and operating aids (2 of 4)
Transformer YNd11d11, 110/11/11kV, 38.1MVA, IL2S2 wrong polarity
Power Automation 47
Power Transmission and Distribution
Power AutomationProgress. Its that simple.
Commissioning and operating aids (3 of 4)
Transformer YNd11d11, 110/11/11kV, 38.1MVA, IL2S2 wrong polarity
Power Automation 48
Power Transmission and Distribution
Power AutomationProgress. Its that simple.
Commissioning and operating aids (4 of 4)
Power Automation 49
Power Transmission and Distribution
Power AutomationProgress. Its that simple.
Protection relay with flexible adaptation to the transformer/generator/motoror short line. Programming of the device data in the relay.
Reduced amount of wiring by direct connection to the main Cts.No matching transformers and therefore no wiring errors.
Zero sequence current can be measured (in the 7UT6).Sensitivity for single-pole faults in the transformer increased by 33% .
Flexible adaptation of the tripping characteristic to various main Cts, tapped transformers.
Exact discrimination between the short circuit condition and the inrushcondition by on-line analysis of the harmonics. Fast tripping for high-current faults. Ct saturation detector for external faults.
Thermal monitoring of one transformer winding (including RTD meas.)
Back-up DMTL/IDMTL with reverse blocking for one winding.
Sensitive short circuit protection for faults winding against earth.
External Trip functions
Various commissioning aids.
Common DIGSI 4 software
Benefits for the Customer
Power Automation 50
Power Transmission and Distribution
Power AutomationProgress. Its that simple.
Comparison of functions/settingsbetween 7UT51- and 7UT6 relays
7U
T5
1
7U
T6
12
7U
T6
13
7U
T6
33
7U
T6
35
Tripping Characteristic: Base point for slope 1 settable --- X X X X
Tripping Characteristic: Increasing of characteristic at start --- X X X X
Tripping Characteristic: minimum setting for add-on stabilization I/InO 5 3 3 3 3
Tripping Characteristic: cross block for add-on stabilization --- --- X X X
Tripping Characteristic: slope of add-on stabilization / slope 1 1 1 1 1
Tripping Characteristic: Increasing of characteristic due to DC offset in IDiff --- --- X X X
Transformer inrush: Default setting for cross block 2. harmonic [cycles] 0 3 3 3 3
Transformer inrush: Default setting for 5. harmonic [%] 80 30 30 30 30
Negative sequence current protection --- X X X X
Over excitation protection [V/Hz] --- --- X X ---
Overload protection IEC 60354 (hot spot) --- X X X X
Single phase busbar differential --- X X X X
High impedance Restricted Earth Fault --- X X X X
Voltage measurements --- --- X X ---
Temperature monitoring (via Thermo-box / RS 485) --- X X X X
All functions can be enabled at the same time --- X X X X
WEB Toll (commissioning aid) --- X X X X
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