replace it with a new one. Cleaning with water, alcohol or
solvents is forbidden.
MVD room
‐
Daily
Check the MVD room daily. Clear the foreign items on time.
Recommand clear the MVD room once a week.
MVD room clear method: recommand clear the ash and other
items with vacuum or wet mop to avoid the dust goes into filter
of MVD.
2
．
Yearly maintenance
Maintenance item
Duration
Maintenance detail
Wiring check (including
ground)
‐
Yearly
Check if the wiring is loosen. The torque wrench can be
used.Check the insulation layer of cable is damaged or not
and check the grounding. Check Maintenace 2 for detail.
Transformer and high
voltage insulation
‐
Yearly
Phase-shifted transformer primary to ground, secondary
winding (not including aux. wiring) to ground should be more
than 100MΩ. Check Maintenace 3 for detail.
Transformer and high
voltage withstanding
‐
Every 2
years
Phase-shifted transfer primary to ground, secondary wiinding
(not including aux. wiring) to ground is tested with IEC61800
standard. There should be no flashover and no breakdown. 2
times checking and the resistance difference is less than 30%,
then the test is passed. Check Maintenace 3 for detail.
MVD internal clearing
‐
Yearly
Clean the MVD inside with vacuum cleaner.
Clean the dust on the surface of component, and clear the
dust in the heatsink of power cell.
Component operation
status checking
‐
Yearly
Use multimeter to check the output voltage of power
supply in control cabinet is correct or not
（
DC26V±0.5V
）
.
Check the output voltage of UPS is correct or not
（
DC25V±0.5V
）
.
Check the relay works normally or not. Whehter there is
abnormal sound.
Check the indicator work normally or not.
Check the electric-magnetic interlocks works normally or
not.
Heater and humidistat contorller checking: when set the
threshold of humidistat to lower than environment
humidity, the heater should start working. After testing,
tunr the theshold to 80%.
Check high voltage electirc display neon light, and the
second locked circuit normal or not.
Check whether the thermal relay setting value is correct
or not.
Do close test for vacuum contactor or breaker, check the
operation and feedback staus is correct or not.
Check whether the fuse and breaker is normal and no
any burn marks.
Summary of Contents for MVF2000 Series
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