ABB UniGear Digital, Commissioning And Testing Manual, Page: 38 / 98

CURRENT S ENSORS PRIM AR Y TESTING
26 1VLG5000 17 C
4.2.4 Non-installed busbars in the switchgear panel
This testing method includes the influence of application, such as the circuit breaker or con-
tactor, which are used to make an electrical circuit between the cable and busbar compart-
ments. The abovementioned testing method is preferred by switchgear factories for the pri-
mary testing of current sensors in a workshop.
If high voltage cables are terminated to switchgear panel, check the installation is
dead.
Protect against any other live parts.
Step 1/7
Verify the sensor parameters set in the protection relay with the sensor rating plates placed
on the circuit breaker door.
Figure 37: Example of a current sensor label
On the protection relay LHMI go to -> Main Menu/Configuration/Analog inputs/
Current (3I, CT)
– Primary current = Application nominal current
– Amplitude Corr A = sensor rating plate, phase A
– Amplitude Corr B = sensor rating plate, phase B
– Amplitude Corr C = sensor rating plate, phase C
– Nominal current = Primary current
– Rated secondary Val = Rated secondary value in mV/Hz
– Angle Corr A = sensor rating plate, phase A
– Angle Corr B = sensor rating plate, phase B
– Angle Corr C = sensor rating plate, phase C
Figure 38: Current sensor parameters