MICOM P-632

TOPICS TO BE COVERED

1.INTRODUCTION.2.RELAY SPECIFICATION.3.PROTECTIONS AVAILABLE IN MICOM P-632.4.INPUT PARAMETERS REQUIRED FOR

CONFIGURATION.5.STEPS TO CONFIGURE MICOM P-632.6.PROTECTION SCHEME FOR 16 MVA MUUL

X-MER AT MRSS.

INTRODUCTION

The MiCOM P63x series differential protection devices are intended for the fast and selective short circuit protection of transformers, motors, generators and other installations with two, three or four windings, respectively.

• P630C: Two-end/winding schemes (two 3 pole CT inputs)• P631: Two-end/winding schemes (two 3 pole CT inputs)• P632: Two-end/winding schemes (two 4 pole CT inputs, one VT input)• P633: Three-end/winding schemes (three 4 pole CT inputs, one VT input)• P634: Four-end/winding schemes (three 4 pole CT inputs, one 3 pole CT input, one VT input)

RELAY SPECIFICATION

1.AUXILLARY VOLTAGE RANGE : 60 -250 VOLTS AC OR DC.

2.CT SECONDARY INPUT (In) : 1/5 AMP(EITHER OF ONE AVAILABLE NOT BOTH AT A TIME)

3.VT SECONDARY INPUT (Vn) : 50-130 VOLTS.4.SYSTEM FREQUENCY (Fn) : 50/60 HZ.5.MOUNTING : Surface/flush.

KEY PAD AND INDICATIONS

RELAY TERMINAL BOCK DETAIL

FROM 33 KV PT INPUT( R&Y PHASE ) TB: XO31

FROM 33 KV SIDE CT (PS CORE)TB: XO32

FROM 6.6 KV SIDE CT (PSCORE)TB: XO52

OUTPUT RELAYS

8 CONFIGURABLE OUTPUT RELAYSTB : XO91 & XO92

Aux Supply

PROTECTIONS AVAILABE

INPUT PARAMETERS REQUIRED

FOLLOWING PARAMETERS OF THE PROTECTED EQUIPMENT ARE REQUIRED

1. S ref : Nominal MVA rating of transformer.2. I nom : Nominal CT ratio( both primary and secondary)3. V nom : Nominal PT ratio.(both primary and secondary)4. Vector Group : Vector group of the transformer5. Phase Sequence : Phase sequence of the system

(a-b-c or a-c-b)a-b-c : R Y B with 120 deg phase angle difference.a-c-b : R Y B with (– 120 deg phase angle difference).

CALCULATION OF MATCHING FACTOR,REFERENCE CURRENT

AMPLITUDE MATCHING.jpgAMPLITUDE MATCHING 1.jpg

EX: MRSS 16 MVA MUUL X-MER SLD.jpgOLD DIFF SCHEME (1).jpgNOW THE ADVANTAGE WITH MICOM -P 632 IS THAT NO MORE NEED OF ICT(INTERPOSING CURRENT TRANSFORMERS) FOR AMPLITUDE AND PHASE MATCHING. CAL.jpg

STEPS TO CONFIGURE MICOM P632For configuring Micom P632, following configurations are done:-1.Date & Time.2.System specifications (CT, PT & Power system specifications).3.Selecting parameter subset(GROUP)4.Protection to be taken in line.5.O/P Relay configuration for each fault & Logic.6.LED configuration for Fault Identification.7.Fault Recording.8.Display Parameters.

NOTE: end A-primary side, end B-secondary side1- refers to protection related to end A,2- refers to related to end B . ex: DTOC 1,REF 2 etc.

3 BASIC SUB MENUS OF MICOM P 632-

1.PARAMETER PARAMETERS.jpg

2.OPERATION OPERATION.jpg

3.EVENTS EVENTS.jpg

SETTING DATE AND TIME

Date & Time:-For setting Date & Time, the procedure is:-

OperationCyclic MeasurementMeasured Operating dataMain DateTime of DateDATE.jpgTIME.jpgCHANGING DATE.jpg

SETTING SYSTEM SPECIFICATIONSFor setting system details, first we have to take Micom P632 in OFFLINE MODE (OUT OF

SERVICE). This is done by:-ParameterFunction ParameterGlobalMain Device on Line PRESS ENTER KEY AND THEN ENTER THE PASSWORDTHE PASSWORD IS -

THEN PRESS ENTER KEY. NOW THE RELAY COMES INTO EDIT MODE AS WE CAN SEE THE RED COLOUR EDIT MODE LED GLOWING.NOW PRESS THE DOWN ARROW KEY-Device on line NO(= OFF) appears on the screen.Now when you press enter device becomes off line(red color led disappears and yellow color out of service led glows) ON LINE.jpgON LINE PWD.jpgEDIT MODE.jpgOUT OF SERVICE.jpg

Then for entering System Settings:-ParameterFunction ParameterGlobalMain Nominal Frequency (fnom) and so on.System details which can be entered in this section are Nominal Frequency, Phase sequence, CT Primary current (end A), CT primary current (end B), CT Secondary Current (end A), CT Secondary current (end B), Neutral CT Primary current(end A), Neutral CT Primary current(end B), Neutral CT secondary current(end A), Neutral CT secondary current(end B),PT primary voltage, PT secondary voltage.FREQ.jpgEND A CT PRIMARY.jpgEND B CT PRIMARY .jpg

(The procedure for taking Micom in ONLINE Mode is the same as that of the OFFLINE Mode.)

SELECTING PARAMETER SUBSET

Parameter subset selection is done as follows:

ParameterFunction GlobalPSSPSS.jpgCHANGE PSS.jpg

Within this we can select the parameter subset we want to make active(out of the four parameter subset 1,2,3,4)

CREATING PROTECTION BLOCKSTEP-1 Take Micom in OFFLINE mode. Out of Service LED should be glowing. Then in the “Configuration Parameters” of the Parameter section, select the protection which is to be created.

ParameterConfiguration Parameter

Diff

REF 1

REF 2

DTOC 1

IDMT 1 & SO ON…

The protection to be taken is selected here by “WITH” and not to be taken is discarded by “WITHOUT”.

Ex. For selecting Differential Protection:-

ParameterConfiguration Parameter DIFFFunction group DIFF “WITH”

“WITH” or “WITHOUT” can be selected by first entering password & then making selection by pressing either or

STEP-2 The protections which are selected in the above section are now also available in “General Function” of “Function Parameter”. Here system details related for the respective Protections are provided. For example:-

REF WITHOUT.jpgDIFF WITH ..jpg

Parameter Function Parameter General Function

DIFF General Enable User “YES”Reference Power Sref (to be entered)Reference Current Iref,a ( Internally Calculated)

Reference Current Iref,b ( Internally Calculated)

Matching Factor, Kam,a (internally calculated)

Matching Factor, Kam,b (internally calculated)

Measured value Rel. Id (internally calculated)

Measured value Rel. IR(internally calculated)

REF_2 DIFF SET 1.jpg DIFF SET 2.jpg DIFF SET 3.jpg DIFF SET 4.jpg

DIFF SET 5.jpg DIFF SET 6.jpg DIFF SET 7.jpg

DTOC1… And so on if other protections are enabled.

STEP 3 Settings of the protection taken in line. The settings are done in ‘Parameter Subset 1’. Parameter subset 1 is also enabled in this section.Settings are entered in:-Parameter Function Parameter PSS1Main

DIFF Enable PS1 Yes DIFF PS1 .jpg

Vector Group End a, bDIFF PS 1 2.jpg

Idiff> DIFF PS1 3.jpg

Idiff>> DIFF PS1 4.jpg

Idiff>>> DIFF PS1 5.jpg

Idiff>(CTS) DIFF PS1 6.jpg

m1 DIFF SET 7.jpg

m2 DIFF PS1 8.jpg

and so on...

Settings to be done accordingly

IDMT 1

REF 1

REF 2

.

.

.AND SO ON…

Settings to be done accordingly

OUTPUT RELAY CONFIGURATIONThere are 8 output relays in Micom P632. The number of output relays may differ from one model number to other.

The output relays are configured As follows –First ,take Micom in OFF Line mode.Now,ParameterConfiguration ParameterOutput

K 901.jpg K 902.jpg K 903 WITHOUT.jpg

Fct. Assigm. K901 ( Enter, Put Password &Select the tripping from the various options

Fct. Assigm. K902

Fct. Assigm. K903

Fct. Assigm. K904

Fct. Assigm. K905

Fct. Assigm. K906

Fct. Assigm. K907

LED CONFIGURATION

LED indicators are provided for signal displays. 5 LED indicators are permanently assigned to Signals which are- Trip, Alarm, Out of service, Healthy & Edit Mode. The remaining 12 LED indicators are available for free assignment by the user. A separate adhesive label is provided for user defined labelling of these LED indicators according to the chosen configuration. Each led can be selected for two indication colours RED and GREEN.The configuration of LEDs are done as follows.

ParameterConfiguration Parameter LED

Fct. Assigm. H5 red ( Enter, Put Password & Select from the various options).

Fct. Assigm. H5 green

Fct. Assigm. H6 red

Fct. Assigm. H6 green

.

.

.

.

And so on (LED H1 to H4 are pre-assigned.) LED H1.jpg LED H2.jpgLED H 3.jpg LED H 4.jpgLED H4 RED.jpg

NOTE:- Changes to the settings can be prepared and confirmed by the means of ENTER Key. In the event of erroneous entries, exit from the EDIT mode or OFFLINE Mode with rejection of entries is possible at any times by means of CLEAR key. When relay is not in OFFLINE mode, pressing CLEAR Key has the effect of restoring the indicators. Pressing the READ key provides direct access to a preselected point in the menu.