Precommissioning Tests - Siemens 7SR45 Manual

7.4

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
System frequency
CT/VT CONFIG
FUNCTION CONFIG
OUTPUT CONFIG
NOTE
i
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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
i
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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.
Reyrolle, Operating, Manual
C53000-B7040-C101-1, Edition 08.2020
Settings
Set nominal frequency
Set phase CT and earth ratio
Enable the protection to be tested
BO CONFIG → select (hand reset/self reset)
LED CONFIG → select (hand reset/self reset)
Commissioning

7.4 Precommissioning Tests

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