100 • High-Pot Test of the HRVS-DN Cabinet
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11.
HIGH-POT TEST OF THE HRVS-DN CABINET
Note
: The high-pot test is performed in the factory as part of the cabinet FAT. (Factory Acceptance
Test). Thus it is not recommended to do the high-pot test at customer site.
High-pot test levels and duration are as follows:
Up to 3.6kV: 10kVAC for 60 seconds
Up to 7.2kV: 20kVAC for 60 seconds
Up to 12kV:
28kVAC for 60 seconds
Up to 15kV:
38kVAC for 60 seconds
Two options for high-pot test available:
With the EPT-Tx connected. In this case only one test can be performed when the soft starter is
short connected as one unit (L1 to U, L2 to V, L3 to W and L1 to L2 to L3)
With EPT-Tx disconnected. In this case it is possible to perform the high-pot test between each
of the phases while the other two phases are grounded.
11.1
High-Pot Test in HRVS-DN up to 6.6kV, EPT-Tx Connected
Preparations (refer to
Figure 39
):
Short circuit the L1B and U busbars of phase L1.
Short circuit the L2B and V busbars of phase L2.
Short circuit the L3B and W busbars of phase L3.
Short circuit input-output phases of the Line Contactor.
Short circuit U, V, W bus bars at the output of the soft starter.
High-pot test procedure:
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 basbars.
Set the tester for the correct testing voltage, as specified above.
Perform the test for 1 minute.
Figure 39 – HRVS-DN up to 6.6kV – Preparations for High-pot Test
Megger test:
