GH DRIVER
Installation of the residual current circuit breaker
The output of the servo driver is a high frequency PULSE wave so that there is high-frequency leakage current generated.
Residual current circuit breaker can be used at the incoming line side of the driver to remove high-frequency leakage current,
and only inspect channel current that dangerous to human body. Please select special residual current circuit breaker for
servo (inverter) for wiring.
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When select special residual current circuit breaker, please select model for control of one driver with an induction current
over 30ma.
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When select normal residual current circuit breaker, please select model for control of one driver with an induction current
over 200ma, and a time over 0.1s.
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Installing isolation transformer between normal residual current circuit breaker and AC servo driver can effectively avoid
malfunction of the breaker.
Incoming line electromagnetic contactor
Incoming line electromagnetic contactor may be used to cut off the power in sequential control. It cannot be used as start of
AC servo driver. When cut off power of AC servo driver compulsorily with incoming line electromagnetic contactor, AC servo
driver is in power-off alarm state, motor only can slide freely and stop.
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Frequent turning on/off incoming line magnetic contactor may cause heating, even burning of charging resistor of the driver
(driver interior).
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The time interval of turning on/off incoming line magnetic contactor shall be longer than 10 minutes.
AC reactor
Installing AC reactor at the incoming line side of the servo driver can effectively suppress the surge of power, avoid burning
of rectification part of the driver, and also can improve the power factor of the power supply side. Please see Figure 2-3 for
connection of AC reactor, see Table 2-1 for selection of AC reactor.
DC reactor
External DC reactor can be connected to GH AC servo driver of 37 to 75KW. It can effectively suppress the surge of power,
avoid burning of rectification part of the driver, and also can improve the power factor of the power supply side. Please see
Figure 2-4 for connection of DC reactor.
If external DC reactor is not connected, P1, P2 or D C + terminals shall be shorted as shown in Figure 2-5.
Precautions for wiring of DC reactor
1. Please do not connect DC reactor to any main circuit terminal except P1, P2, otherwise, it may cause internal short circuit of
the driver, and burn the driver.
2. Please see Table 2-3 for specifications of DC driver connecting cable, the standard of the main circuit cable.
3. Please see Table 2-1 for selection standard of DC reactor.
4. With external DC reactor, the P2 terminal shall be multiplex terminal, and one end of braking resistor also shall be connected
to the terminal.
2-
5
GH AC Servo driver
Current reactor
P1
P2
GH AC Servo driver
P1
P2
Figure 2-4 DC reactor connection diagram
Figure 2-5 Connection diagram without DC reactor
Caution
