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