EVR AUTOMATIC RECLOSER
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HANCED
TEC
HNOLOGY
7. MAINTENANCE
7.1. GENERAL
1)
The recloser has been designed as a low maintenance unit and using single moving part as
adopting magnetic actuator mechanism does not require major maintenance like overhaul.
2)
The control and relay maintenance, please refer to operation and maintenance instructions for
EVRC2A.
3)
Each equipment maintenance for recloser, please refer to section 3 and 4.
4)
A general inspection of the recloser should be made giving attention for clean and normal
condition of each equipment.
7.2. DISMOUNTING OF RECLOSER
1)
Ensure that the HV system is grounded for safety.
2)
Dismantle high voltage connections and prepare the slinging wire to lift recloser.
3)
Before the lifting of the recloser on the pole, with the lifting arm fitted and maintain to support
the weight of the recloser with the lifting arm engaged.
4)
Remove the multi-core connectors on the recloser.
5)
Dismantle the lower hanger band fixing bolts and consequently the upper hanger band fixing
bolts.
6)
Lift the recloser and move to the ground level.
7)
Dismantle the control cubicle mounting bolts.
8)
Lift the control cubicle and move onto the ground level.
7.3. CONTACT LIFE OF VACUUM INTERRUPTER
The life of the vacuum interrupter is normally over 20 years or 30,000 reclosing operations with
light load operations stating by manufacturer. However, it can vary depending on the magnitude of
fault currents and number of reclosing operations under loaded condition.
The remaining life of the vacuum interrupter is displayed on LCD with percentage of wear-out at
contact point based on calculating from magnitude of fault currents and number of trip operations.
The vacuum interrupter is recommended to replace if the remaining life becomes lower than 20%.
Be sure to consult with the manufacturer for replacement in details.
Summary of Contents for EVR
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