Power Frequency Test of Busbar (Optional)
 WARNING |
|---|
|
hazard of incorrect operation
Comply with the safety provisions.
Failure to follow these instructions can result in death, serious injury, or equipment
damage.
|
A test unit and a test adapter (not included in scope of supply) are required for the power frequency test.
Preparation
 DANGER |
|---|
|
hazard of incorrect operation
Failure to follow these instructions will result in death or serious injury.
|
-
Busbar:
Disconnect voltage transformer (EvoPact MTX) and surge arrester. Earth voltage detecting systems. -
Incoming feeder panel for voltage test:
Remove cable compartment cover and disconnect voltage transformer and surge arrester. Earth voltage detecting systems.
-
Observe the assembly and operating instructions for the test unit and the test adapter.
-
Observe admissible test values for the switchgear and the admissible test values for power-frequency tests after installation of the switchgear in accordance with IEC 62271-200: 2011.
Performing the power frequency tests
-
Connect test unit to the test cable.
-
Switch the earthing switch OFF.
-
Move circuit breaker truck EvoPact HVX into service position and switch circuit breaker ON.
-
The adjacent phases are required to be earthed prior to conducting the power frequency test in sequence for all three phases (L1, L2, and L3) according to the specifications provided by the test unit manufacturer.
Figure 71
Switch position during the power
frequency test (for example: five panels)
-
Feeder panels
-
Incoming feeder panel for test voltage
-
Busbar
-
Test unit (for example, high-voltage source, test transformer)
-
Test cable
After the power frequency test
-
Switch circuit breaker OFF and put circuit-breaker truck into disconnected position;
-
Switch earthing switch ON.
-
Remove test unit and test cables.
-
Reconnect disconnected voltage transformers and surge arresters.