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3 Inspecting Devices Before Power-On
Checking the PDB
3a
Testing mechanical performance
1.Switch on and off all circuit breakers three times. Ensure that they can be switched on and off
smoothly.
2.Check that all bolts are secured for cables. Fasten the bolts that are not properly secured.
3.Check that screws at the ground point are secured. Fasten the screws that are not properly
secured.
Testing insulation performance
(You are advised to test the insulation performance together with the onsite electricians.)
1. Switch off the surge-protective circuit breaker (QF2).
2. Check that the insulation resistance between the L terminal and the PE terminal on the PDB
is greater than or equal to 2 MΩ.
3. Check that the insulation resistance between the N terminal and the PE terminal on the PDB
is greater than or equal to 2 MΩ.
Checking the UPS
3b
1. Switch on and off all input circuit breakers three times. Ensure that they can be
switched on and off smoothly.
2. Check that all bolts are secured for cables. Fasten the bolts that are not properly
secured.
3. Check that the voltage between the mains input neutral wire and the ground cable
is less than 5 V AC. (You are advised to test the insulation performance together
with the onsite electricians.)
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