IMO VXSM75-1 Instruction Manual page 88

Item
Overload
protection
Overvoltage
protection
Overcurrent
protection
Surge
protection
Undervoltage
protection
Overheat
protection
Short-circuit
protection
Ground fault
protection
Motor protection
Braking resistor
protection
Stall prevention
(simple torque limit) ramp is suspended to avoid overcurrent stop.
Input phase loss
protection
Output phase loss
protection
Auto reset
Installation location
Ambient
temperature
Relative humidity
Altitude
Vibration
Storage
temperature
Storage humidity
Specifications
Detail specifications
Inverter protection electronic thermal overload relay
An excess in the DC link circuit voltage (approx. 400 Vdc for 200V class, approx.
800Vdc for 400V class) is detected for inverter protection.
The inverter is protected against an overcurrent caused by an overload on the
output side.
The inverter is protected against a surge voltage penetrating between the power
supply cable of the main circuit and the ground.
Voltage drop (approx. 200 Vdc for 200V class, approx. 400Vdc for 400V class)
in the DC link circuit voltage is detected to stop the inverter.
The inverter is protected against failure of the cooling fan.
The inverter is protected against an overcurrent caused by a short-circuit on the
output side.
The inverter is protected against an overcurrent caused by ground fault in the
output wiring.
* Detection when starting
Electronic thermal overload relays protect general purpose motors.
The thermal time constant can be adjusted to 0.5 to 10.0 min.
Second electronic thermal overload relay can be provided. (Switching with
external signal)
Upon an overheat of the damping resistor (external unit), discharging operation
and inverter operation stop
• When the output current exceeds the limit during acceleration, the frequency
• When the output current exceeds the setting during constant speed operation,
the frequency is decreased to maintain an almost constant torque.
• When the DC voltage exceeds the limit during deceleration, the frequency
ramp is suspended to avoid overvoltage trip.
The inverter is protected against phase loss of the input voltage.
An unbalance in the impedance of the output circuit is detected to output an
alarm. (Error during tuning only)
The number of retries and wait time can be set for a fault trip.
• Indoors
• Places without corrosive gases, flammable gases or dust
(degree of pollution: 2)
• Places without direct sunlight
-10 to +50 °C
5 to 95% RH (without condensation)
1000 m Max. (Atmospheric pressure 86 to 106 kPa)
3mm 2 to 9 Hz
9.8m/s 2 9 to 20 Hz
2m/s 2 20 to 55 Hz
1m/s 2 55 to 200 Hz
-25 to +65 °C
5 to 95% RH (without condensation)
9-6