Manual Operational Check; Electrical Operational Checks - Eaton AK-2-25-LV-VSR-425A Instruction Book

AK-2-25, AK-2A-25, & AK-3A-25 LV-VSR
Breaker-To-Motor Starter Conversion

5.3 MANUAL OPERATIONAL CHECK

Manual operational checks must be performed before the LV-VSR
is connected to a live circuit. Manual operational checks can be
performed with the LV-VSR in the 'Test' position in the cell or
outside of the cell, as long as secondary power is available.

5.4 ELECTRICAL OPERATIONAL CHECKS

WARNING
DO NOT PERFORM ELECTRICAL OPERATION CHECKS WITH THE LV-VSR IN
THE 'CONNECT' POSITION BECAUSE OF THE POSSIBILITY OF CONNECTING
DE-ENERGIZED LOAD CIRCUITS TO THE ELECTRICAL POWER SOURCE,
RESULTING IN DEATH, PERSONNEL INJURY OR EQUIPMENT DAMAGE.
The LV-VSR can only be operated electrically when the following
conditions are met:
1. Control power is present, either by having the LV-VSR
in the 'Test' position in the cubicle or by a test cabinet
connected to the LV-VSR.
2. The overload relay reset if tripped.
3. The current limiting fuses are not blown.
Having met these conditions, the LV-VSR may be electrically
operated.
There is no provision to close the LV-VSR locally on the unit. The
close signal must be applied remotely or by a control switch located
at the switchgear.
To open the LV-VSR, either send a remote open signal, press the trip
plate on the LV-VSR, or press the test button on the overload relay.
Perform several close/open operations to ensure reliable and
constant electrical operation.
WARNING
DO NOT ATTEMPT TO INSTALL OR OPERATE A LV-VSR UNTIL A VACUUM
INTEGRITY TEST IS PERFORMED.
Move the LV-VSR to an area with adequate room, and outside the
Arc-Flash boundary for the following tests:
Vacuum Integrity Checks
Using a dry lint-free cloth or a paper towel, clean all of the insulating
surfaces on the LV-VSR. Check the vacuum integrity of the
interrupters of the three vacuum bottles by conducting the applied
potential test as described in Section 6 of this manual.
Low Frequency Withstand Test
Check the LV-VSR primary and secondary insulation integrity by
conducting the applied potential test as described in Section 6.
Contact Inspection
Contact Wear allowance and mechanical checks on the V201 Vacuum
Contactor are described in Section 6.
Primary Circuit Resistance
Testing that measures the primary circuit resistance is not
recommended since the results can vary widely on good contacts. It
is measured at the factory prior to shipment. If a resistance check is
required check the primary resistance described in Section 6.
18 Instruction Book IB019009EN November 2017 www.eaton.com