105 • High-Pot Test of the HRVS-DN Cabinet
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Figure 45 – HRVS-DN from 10kV and up, EPT-Tx not Connected, Preparations for High-pot Test, Testing L2
High-pot test procedure for L3 (refer to Figure 46):
Dismantle the EPT-Tx
Short circuit the L1 and U busbars of phase L1.
Short circuit the L2 and V busbars of phase L2.
Short circuit the L3 and W busbars of phase L3.
Short circuit input-output phases of the Line Contactor.
Short circuit input-output phases of the Bypass Contactor.
Connect to ground L1 and L2
Connect the ground cable of the High-pot tester to Cabinet ground (earth).
Connect the live cable of the High-Pot tester to the soft starter busbars of L3.
Set the tester to the correct test voltage, as specified above. Perform the test for 1 minute.
Figure 46 – HRVS-DN from 10kV and up, EPT-Tx not Connected, Preparations for High-pot Test, Testing L3
Megger Test:
You can perform a Megger test (5kVDC) between each phase to ground.
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