Dc Capacity Of Main Circuit; Resistor Of Main Circuit; Transformer And Reactor Of Main Circuit; Magnetic Contactor And Relay Of Main Circuit - Delta VFD-B User Manual

Chapter 8 Maintenance and Inspections|VFD-B Series

DC capacity of main circuit

Check Items
If there is any leak of liquid,
color change, crack or
deformation
Measure static capacity when
required

Resistor of main circuit

Check Items
If there is any peculiar smell or
insulator cracks due to overheat
If there is any disconnection

Transformer and reactor of main circuit

Check Items
If there is any abnormal vibration
or peculiar smell

Magnetic contactor and relay of main circuit

Check Items
If there are any loose screws
Check to see if contacts work
correctly
8-4
Methods and Criterion
Visual inspection
≥
Static capacity initial value X 0.85
Methods and Criterion
Visual inspection, smell
Visual inspection or measure with
multimeter after removing wiring
between +1/+2 ~ -
Resistor value should be within
Methods and Criterion
Visual, aural inspection and smell
Methods and Criterion
Visual and aural inspection
Visual inspection
Revision July 2008, BE16, SW V4.08 & V5.00
Maintenance
Period
Half
Daily
Year
Maintenance
Period
Half
Daily
Year
±
10%
Maintenance
Period
Half
Daily
Year
Maintenance
Period
Half
Daily
Year
One
Year
One
Year
One
Year
One
Year