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9 Commissioning
PCS-9785 Satellite-Synchronized Clock
9-4
Date: 2019-07-05
Voltage transformer circuits
Current transformer circuits
DC power supply
Optic-isolated control inputs
Output contacts
Communication ports
The insulation resistance should be greater than 100MΩ at 500V.
Test method:
To unplug all the terminals sockets of this device, and do the Insulation resistance test for each
circuit above with an electronic or brushless insulation tester.
On completion of the insulation resistance tests, ensure all external wiring is correctly reconnected
to the device.
9.5.1.3 External Wiring
Check that the external wiring is correct to the relevant device diagram and scheme diagram.
Ensure as far as practical that phasing/phase rotation appears to be as expected.
Check the wiring against the schematic diagram for the installation to ensure compliance with the
customer’s normal practice.
9.5.1.4 Power Supply
WARNING!
Energize this device
ONLY
if the power supply is within the specified operating range in
the chapter
"Technical Data"
.
The device only can be operated under the auxiliary power supply depending on the device’s
nominal power supply rating.
The incoming voltage must be within the operating range specified in the chapter
"Technical Data"
,
before energizing the device, measure the auxiliary supply to ensure it within the operating range.
Other requirements to the auxiliary power supply are specified in the chapter
"Technical Data"
.
See this section for further details about the parameters of the power supply.
9.5.2 With the Device Energized
The following groups of checks verify that the device hardware and software is functioning
correctly and should be carried out with the auxiliary supply applied to the device.
The current and voltage transformer connections must remain isolated from the device for these
checks. The trip circuit should also remain isolated to prevent accidental operation of the
associated circuit breaker.
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