testing procedure for capacitor bank protection relay sel … · testing procedure for capacitor...

- 1 - Prepared by: Engr. M.Ramsankar

TESTING PROCEDURE FOR CAPACITOR BANK PROTECTION RELAY

SEL- 451


Table of contents

To Communicate with the Relay

To receive or read setting from the Relay

To change the setting and send to the relay

To save our setting file

To take metering

To test over current pickup and timing

To get EVENTS from the relay

To test Phase Highset element

To test Ground Fault High set and Low set element

To get Characteristic Curve test


UCOMMUNICATION WITH THE RELAY

Go to All programs click on “AcSELerator Quickset”

The below window will appear, and then click on “communications parameters”.


Select the setting as follows: Active Connection Type : serial, Device : COM? : USB serial port, Data speed : Auto detect,

And other all settings leave it as per default setting. Then click “Apply” and “ok”.

Click on “read” to read setting file from the relay. TO RECEIVE OR READ SETTING FROM THE RELAY


Then click “ok”


The file will be transfer to our Laptop.

Then click on “Open settings in a new editor”


After that this setting file will be appear

UTO CHANGE THE SETTING AND SEND TO THE RELAY

We can change any parameter setting as we need. Go to ‘General Global Settings’ change ‘NFREQ nominal Frequency’ 60Hz.


Selected the ‘Line Configuration’ then CT & PT ratio change in relay as per scheme.

We can send this file after all changes in setting. Click “send activate settings” on toolbar


Select box by putting tick (√) automatically available to whatever changes we have done and Click “ok”.

All changes setting are transfer to the relay.


After transfer all changes in setting files the below screen will appear.

UTO SAVE OUR SETTING FILE

Go to “file” and click “save” or “save as”


Create name of setting as we need. Then click “ok”. Once we save setting we can open the file in offline condition also.

UTO TAKE METERING

Then inject from FREJA three phases or single phase current to take the reading from “Terminal Screen”. Click ‘Terminal’ and type ACC for level-1 and password (OTTER) also. Then type ‘MET’ for metering.

Level-1 user name : ACC Level-1 password : OTTER Level-2 User name : 2AC Level-2 password : TAIL Warning : password must be in capital letters


For the Definite Time over-current test. Click ‘Phase Instantaneous / Definite-Time Over- current’ screen will appear like this. For pickup test, set IP (50P1P)>= 0.5A and time (67P1D) =0 in Relay.

Then go to the FREJA 2nd page and make it VOLTAGE & CURRENT zero,

FREQUENCY must set to60Hz.

TO TEST OVER CURRENT PICKUP AND TIMING

Now press start in FREJA. Increase the R phase current. When current will reach our setting value trip will come. Automatically FREJA will be stopped by FREJA Binary input. Do the same test for other two phases.

For timing test, Set in Relay 67P1D=180 Cycles (t=3 sec). Inject more than pickup value or two time of pickup value; trip will come as per our time setting value.

We can assign more than one trip function in one contact that time we will use ‘trip logic’


We take separate trip, so we can assign as per the protection testing. Here we can assign the Binary output as per protection. In the screen ‘output104’ is taken as definite Time Over-current.


*Note in SEL Relay ‘output 101’ and some other outputs polarity is available (+/-). So we take FREJA binary input as per polarity.

TO GET EVENTS FROM THE RELAY

Go to “Tools” and “Events” and “Get Event files”


This screen will appear and select the event you want to save

Then we click “Get selected Events”


The below screen will appear

You can select the place you want to save and create name and click “save”


After finishing save this screen will appear and click “save”

Click “close” once the below dialog box appears


We can see this event in “Tools”, “Events” and “View Event Files”

Then choose the event (before we saved that event file) click “open”


After that we can see all events “Graph, phasors, event report text, settings, .etc”


For example: settings

The below screen will appear


If Highset phase element is not enabled go to “Relay Configuration” then change ‘2’ in “E50P Phase Instantaneous/Definte-Time Overcurrent Elements”

TO TEST PHASE HIGHSET ELEMENT TEST

For setting we set “Phase Instantaneous Over current 2” as we need. For pickup test time cycle is zero. We can do same test procedure for low set and High set (pickup test and timing test).


UTO TEST GROUND FAULT HIGHSET AND LOWSET ELEMENT TEST

If Highset Ground element not enable first go to “Relay Configuration” then change ‘2’ in “E50G Ground Instantaneous/Definte-Time Overcurrent Elements”

We can set value in ‘Residual Ground Instantaneous /definite Time Over current’ as per our test sheet.


For ‘Output101’ contact for Low elements (Ground fault). We can do same test procedure for low set and High set (pickup test and timing test).

Output contact for High elements. (Ground fault)


Low set Curve Criteria test, Click “Time Over current” and select ‘C1’ in “51S1C” TAB.

CHARACTERISTIC CURVE TEST

For Neutral test select “3IOL” in ‘51S1O’ TAB.


‘Output101’ Contact for Curve Criteria test:

testing procedure for capacitor bank protection relay sel … · testing procedure for capacitor...

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