nader NDW3 Series Manual page 43

4.2.4 Motor operating mechanism
The circuit breaker can only be closed after the motor operating mechanism
make the circuit breaker to store energy in advance.
◆ Operation features
1) If the rated supply voltage of the motor operating mechanism is between
85%~110%, energy storage of the circuit breaker can be made in place.
2) The motor will close the power supply automatically and stop operation after
it stores energy in place.
3) The motor operating mechanism can realize the automatic pre-energy storing.
◆ Technical Parameters of Motor Operating Mechanism
Rated
Energy
insulation
storage
voltage
time
(Ui)
3s~5s
400V
4.2.5 Undervoltage release
◆ Action features of the undervoltage release
1) When the applied voltage drops, even slowly drops to 70%~35% of
the rated operational voltage,
the undervoltage release will work to disconnect the circuit breaker;
2) When the applied voltage is less than 35% of the rated operational
voltage of the undervoltage release,
the undervoltage release will make the circuit breaker cannot be closed;
3) When the applied voltage is 85%~110% of the rated operational voltage of the undervoltage
release, the undervoltage release can be closed reliably to guarantee the reliable closing of the circuit
breaker.
◆ Undervoltage release can be divided into two types (instantaneous release and delayed release),
which is mainly composed of coil, iron core component and electronic parts.
◆ Undervoltage delayed release
Internal & confidential file
File No.:NDT2920202
Power Consumption Table of Motor Operating Mechanism
Rated control
supply voltage
(Us)
AC220V/AC230V
AC380V/AC400V
(50/60Hz)
DC220V/DC110V
第 43 页 共 149 页
Power consumption
NDW3-1600 NDW3-2500
90VA 110VA
90W 110W
File Version:4
NDW3-4000 NDW3-6300,7500
110VA 180VA
110W 180W