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OVR-15, 27 & 38 LV cabinet Instruction Manual
7
I
NSPECTION AND MAINTENANCE
The OVR-15, 27 & 38 LV unit will require minimal maintenance if handled properly. Frequency of operation
and local environmental conditions should be considered when determining maintenance schedule.
To a large extent, the safety and successful functioning of any apparatus or system connected with the
recloser depends on the proper installation, commissioning, programming and con
fi
guration of the unit.
To provide long, reliable service, the LV unit should be inspected at regular intervals. Operating
experience, environmental conditions, the number of operations, and any unusual service conditions will
guide you in establishing a maintenance schedule.
The maintenance work can only be carried out by trained personnel who knows & respect all safety
regulations, furthermore, it is recommended that ABB service personnel should be called in, to check the
service performance and for repair work.
A
CTIVITIES BEFORE DOING ANY MAINTENANCE OF THE RECLOSER
LV
UNIT
(Perform this in conjunction with HV unit instruction manual)
1. OPEN the recloser with the emergency manual trip (K69) handle .This enables the mechanical as well as
electrical BLOCK CLOSE (recloser cannot be closed unless the K69 handle is manually reset).
2. Confirm the recloser OPEN status on RER615 relay HMI and on the mechanical ON/OFF Indicator on
HV cabinet.
3. Switch OFF all the MCBs to disconnects AC Aux Power and battery back up.
4. Put the Service/DISCHARGE selector switch in the LV cabinet to "DISCHARGE" position. This will
connect capacitors to the discharge circuit.
5. Wait till the capacitors are discharged to safe level (until the RED LED on discharge circuit stops glowing)
6. Since RER615 relay and optional Radio modem are supplied by charging device, switching OFF of
power supply also switches OFF the charging device, RER615 relay and any connected radio modem.
7. Thus, all the electrical controls/measurements & protections/communications of the recloser are switched
OFF and recloser LV cabinet is ready to for maintenance.
A
CTIVITIES BEFORE DOING ANY MAINTENANCE OF THE RECLOSER
LV
UNIT
1. Follow all activities mentioned in previous clause
2. Ensure that the main circuit is properly earthed
3.
Ensure that all the safety norms are followed as per your country and company’s policy
