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Idiomas disponibles
1) Solution for Circuit Breaker's abnormal condition
Type
Condition
Terminal unit
Temperature
Overheating
Increase
Product (except terminal unit)
overheating
Impossibility of closing (ON)
Abnormal
Impossibility of reoperating
operation
Impossibility of Breaking
/ OFF Impossibility
Fault
Current
Fault Current Flow
Flow
Break
On normal load breaking
Fault operating
During
motor starting
Frequent
MCCB's
Instantaneous
Operation
While Starting
Operating current
Inactivity
of rated current
Short circuit of
Inactive operation
Power side
over rated operating current
2) Solution for accessories abnormal operation
Type
Condition
SHT
Trip inactive
UVT
Closing impossible
ALM/AUX
Fault operation
Installation Instructions
Possible Causes
Loose terminal unit tightening screw
Faulty busbar bar assemble
Faulty contact to internal contactor
Current density increase by wire terminal
Foreign substance in switch
Reclosing without reset on trip position
Worn out by breaking endurance
Reset device operation fault
The coil of under voltage trip device is not excited.
Switch spring burn out and exhaustion.
Bimetal corrosion and transformation
Reaching the life of switch limit
Overheating of over current detecting element
Contact meeting and fusion by excessive breaking current
Inflow of insulation material between contact.
Conductive unit melting
Contact burn out (wear)
Wrong selection of product rating (causing overheating)
No window inside panel (Causing overheating)
MCCB internal heating
Loose terminal connection unit.
Heating by starting current
Overload current more than rated current flows.
(when using motor with overload or over voltage)
Excessive starting current
Excessive current Y△ starting switching
Excessive current by reversible operation
Instantaneous restarting rush current
Operation by starting current like charging current of condenser,
incandescent electric lamp flow, charging, etc.
Motor's Layer Short
Abnormal current flow at the same time with closing
Operating circuit fault connection
Large rated current
Current limit break of top fuse or incompatibility with top circuit breaker
Dust piling up
Switch side drop away of conductive material
Possible Causes
Operating voltage drop
Incorrect commercial voltage selection
Coil burn out
Applied frequency or voltage fault
Loose attachment screw
- 11 -
GCB800/1200
Solution
Tightening with designated torque
Busbar bar reassemble
New product replacement
Remove foreign substance
Closing after reset
New product exchange
Request after service
Applying power
Replacement and mending
Request after service
New product exchange
Operating after cooling
New product exchange
Remove foreign substance
New product exchange
New product exchange (rating reselect)
New product exchange
Tightening terminal screw (check)
New product exchange
Rating adjustment
Instantaneous breaking current setting or rating adjustment
Motor mending
Circuit inspection
Select low rated current
Protection cooperation review or rating adjustment
New product exchange
New product exchange
Solution
Power improvement
Request after service
Power improvement
Readjustment
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