Precommissioning Tests
Secondary Tests
In the numerical relay test kits, select the appropriate burden (VA) for testing the relay functionalities.
The following settings must be configured on the relay during testing.
Parameters Settings
System frequency Set nominal frequency
CT CONFIG Select CT type and set I
s
value
FUNCTION CONFIG Enable the protection to be tested
OUTPUT CONFIG BO CONFIG → select (hand reset/self reset)
LED CONFIG → select (hand reset/self reset)
NOTE
To reset the hand reset output contacts, assign the binary inputs to Rst LED & O/Ps and set the binary
inputs pickup delay as 0.5 s for automated overcurrent and earth fault characteristics test modules.
Primary Tests
Primary injection is recommended to ensure the relay connections, CT polarity, and settings before imple-
menting the protection scheme into service.
Isolate the auxiliary DC supplies for alarm and tripping from the relay and remove the trip and inter-trip links.
NOTE
Before carrying out any primary injection, it is important to ensure appropriate current transformers are
shorted to avoid any maloperation of mesh corner or busbar type unit protection.
7.5
Commissioning
7.5 Precommissioning Tests
Reyrolle, Operating, Manual 77
C53000-B7040-C103-1, Edition 10.2022
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