Protection Function And Troubleshooting - ACP Speecon 7200M3 Manual

2.8 PROTECTION FUNCTION AND TROUBLESHOOTING

Protection function
Main circuit
low voltage
Low voltage
protection Momentary
power loss
protection
Overcurrent protection
Ground - fault protection
(Optional function)
Overvoltage protection
Fuse blown
Cooling fin overheat
(Only for forced cooling type)
Motor
Overload
protection
Inverter
Over torque
detection *1
External fault signal input
Control circuit fault, option fault
*2
When the inverter power voltage drops, torque becomes insufficient and motor is
overheated.
Inverter output is stopped when the main circuit
DC voltage becomes lower than the low voltage
detection level.
Detection level: Approximately 210 Vdc or less
for 220V class 3-Phase
170 Vdc or less for 220V class
single-Phase
and 420 Vdc or less for 440V class 3-phase
The inverter output is shut-off when the inverter output current becomes approx. 200%
and above of inverter rated current.
The inverter out is shut-off when a ground-fault occurs at the inverter output side and
the ground-fault current exceeds approximately 50% of the inverter rated current.
The inverter output is shut-off when the main circuit DC voltage becomes excessive
because of regeneration energy caused by motor deceleration and negative load.
Detection: Approx. 820 Vdc or more for input voltage 440V class
410 Vdc or more for input voltage 220V class
The inverter output is shut-off when the main circuit transistor fails. The fuse clears to
prevent wiring from being by the short-circuit current.
The inverter output is shut-off when the ambient temperature rises and the heat sink fin
reaches 90 ℃. Please check for a defective cooling fan or clogged filter.
Inverter output is stopped when motor overload is detected by the electronic thermal
overload in the inverter. Either a inverter duty constant-torque specialized motor or
general-purpose motor can be selected. If more than one motor is driven, overload
protection should be disabled. Use a thermal relay or thermal protector for each motor.
The inverter output is shut-off when the electronic thermal overload reaches or
exceeds the inverse time limit of 112% of the inverter's rated current occurs.
Maximum rated overload: 150%, 1 min.
The motor operates according to a preset mode when the inverter output current
exceeds the overtorque detection level. This function is used to protect the machine or
to monitor the output torque.
When an external alarm signal is input, the inverter operates according to a preset stop
method (coasting to a stop, continuous operation, or ramp to stop)
The inverter output is shut-off when a transmission error occurs in the control circuit
or a component fails. The inverter output is also shut-off when a specialized option
such as the digital operator is not properly connected.
Explanation
- - 106
Fault contact
Monitor display
output
Operation
(UV1)
(OC) Operation
Operation
Operation
(OV)
Not display No Operation
Operation
(OH)
Operation
(OL1)
Operation
(OL2)
Operation
(OL3)
EF4
to Operation
EF5
Operation
To