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Item Specifications Remarks
Overload • Internal electronic thermal overload relay protects drive overload.
Overvoltage • Detect the excessive DC link circuit voltage to stop drive.
Overcurrent • Detect overcurrent due to overload on drive output side to protect drive
Incoming surge • Detect incoming surge voltage between AC power and the earth to protect
drive.
Undervoltage • Detect the DC link circuit undervoltage to stop drive
Overheating
• Detects the cooling fan fault or abnormal temperature rise of drive to pro-
tect drive.
Short-circuit • Detect overcurrent due to short-circuit on drive output side to protect drive.
Ground fault
• Detects overcorrect due to ground fault on drive output side to pro
tect drive.
(Detect at starting)
Motor protection • Protect general-purpose motor with electronic thermal overload.
Input phase fail-
ure protection
(only for 3-phase
200V series)
• The drive is protected against phase failure on the input side or over-current
due to inter-phase imbalance.
Stall prevention • Controls frequency to prevent OC trip in case of the output current exceeds
the limit value during acceleration.
• Lowers the frequency to hold almost constant torque in case of the output
current exceeds the limit value during constant speed running.
• Controls frequency to prevent OU trip in case of the DC link circuit voltage
exceeds the limit value during deceleration.
Retry • “Retry” function can be set for the protective functions OC1 to OC3 and
OU1 to OU3.(No. of times of retry: 5, waiting time: 0.5s fixed.
Dielectric
strength test
• At 2000Vac for 1 min. between any main circuit terminals and
ground.(10mA or less)
Protection
Megger test • At 500Vdc megger test between any main circuit terminals and ground
(5MΩ or more)