Protection Engineering Basics and Schemes Protection Engineering | Page 182

95% of voltage or 60.33 Voltage to relay via test kit set.
Method of Testing:
 Isolate Voltage relay from system, our PT is
11KV/110V, and system is star-star connected.
 Confirm zero voltage status
 Sverker 750/760 is my device, voltage relay I am
testing is SEL 751A.
 Power up SEL 751 A relay through Sverker 750/760
 Open Relay software “AcSelerator”, and set values as
per your requirement , I took 95% setting, means
whenever our secondary side line to neutral voltage
reaches 60.33v in star connected PT(Primary voltage
will be 6.034KV) relay will pick up. We need to
connect Testing leads to E port from Testing Kit as
per figure 3A.
 After Pick up, note all Test values now you need to
reduce supply voltage to Zero level.
 Check it and remove kit connection
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