1 Product Information
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32
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Item
Protection
features
Motor overload
protection
A motor protection curve can be set in a parameter.
AC drive overload
60s for 150% of the rated current, 10s for 200% of the
rated current
Short circuit
protection
The drive controller is protected when any two-phase
short circuit on the output side causes overcurrent.
Phase loss protection
The AC drive provides the phase loss detection
function. In case of incorrect input phase sequence,
the control system will report phase loss, stopping the
running of the elevator and preventing accidents.
Overvoltage threshold
Bus voltage 800 V (for 380 V series) and 400 V (for 220 V
series)
Undervoltage
threshold
Bus voltage 350V (for 200V series) and 150V (for 220 V
series)
Compensation due to
instantaneous power
failure
Protection if instantaneous power failure time is more
than 15 ms
Heatsink overheating Protection by the thermistor
Stall prevention
Stall protection when the speed deviation is greater
than 15% of the rated speed during running
Rotary encoder
abnormality
Rotary encoder abnormalities include rotary encoder
phase loss, reverse direction, cable breaking, pulse
interference, etc. In these cases, the system will
perform protection immediately to prevent accidents.
Braking unit
protection
The braking unit is protected when it is automatically
detected to be normal.
Module protection Overcurrent, short circuit and overheat protection
Current sensor
protection
Self-test at power-on
Speed abnormality
protection
When the encoder feedback speed exceeds a limit or
the deviation between the torque limit and the speed
test feedback is excessive, the system will immediately
perform protection, give an alarm immediately and
prohibit rerunning, achieving quick protection against
abnormal elevator speed.
Input overvoltage
protection
Over 725 V for 400 V class, over 360 V for 200 V class,
detection upon stop
Output grounding
protection
When any phase is short-circuited to ground during
Output imbalance
protection
When three-phase current output imbalance is
the AC drive.
Braking resistor short
circuit protection
Detection during braking
Running time limiter
protection
Leveling switch
abnormality
protection
Leveling switch abnormalities include leveling
switch failure and sticking. The system judges both
abnormalities according to the feedback change
process of leveling signals. If there is no change in
leveling signals, the system will give an alarm.
EEPROM fault Self-test at power-on
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