Cable Test after Assembly

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 cable testing.

NOTE: The assembly, operating and testing instructions for cable fittings and connectors and the test unit must be taken into consideration.

During the cable test, the busbar can be operated at rated voltage (see nameplate). For qualification of the current transformers for cable tests, enquire at the appropriate manufacturer's.

Preparation

WARNING
hazard of incorrect operation Strictly observe the assembly instructions for the test adapters and the operating and inspection instructions for the test unit. Failure to follow these instructions can result in death, serious injury, or equipment damage.

Isolate outgoing feeder cable of the panel to be tested.
Isolate outgoing feeder cable in remote station.
Earth outgoing feeder cable of the panel to be tested.
Remove cable compartment cover (see Access to the Cable Compartment).
Disconnect voltage transformer and surge arrester; earth voltage detecting systems.

Performing the cable test

NOTE: Verify the metallic components of the test adapter are at a sufficient distance from the earthed switchgear components (for example, housing).

Connect the test adapter to a free cable connection in the panel and on the test unit. To this effect, observe the specifications of the test unit’s manufacturer.

Set switchgear panel to test position:

Circuit breaker	OFF
Truck	In disconnected position
Earthing switch	OFF

Perform cable test according to the cable manufacturer’s specifications. When doing so, do not exceed the admissible limits (see Table).

Once the cable test has been completed:

Earth feeder cable again.
Remove test set.
Reconnect voltage transformer, surge arrester and voltage detection systems or de-earth them.
Reposition cable compartment cover.

Admissible limits for the cable test in panels

Admissible limits for the cable test in panels⁽¹⁾	DC test voltage [kV] max. 15 min.
PIX 12	34
PIX 17	42
PIX 24	67

⁽¹⁾ Admissible limits for the switchgear in case of cable tests with a testing frequency of 0.1 Hz available on request from the manufacturer’s.