User Manual of SY5000 series AC Drive Wiring
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,
1
,
1
,
2
1
,
1
2 are DC reactor terminals of main circuit
PB
Between PB and is the terminal of built-in braking resistor
Ground terminal
，
grounding
3.4.3 Precautions of main circuit wiring
1. Installation of ELCB
As the inverter’s output is high-frequency PWM signal, the inverter will generate
high-frequency leakage current, please select Y2 type delay leakage circuit breaker
with above 30mA current sensitivity; if use ordinary ELCB, please select ELCB with
above 200mA current sensitivity.
2. Connection with terminal blocks
The phase sequence of input power supply is irrevelant to R
(
L
1
)
, S
(
L
2
)
,
T phase
sequences of terminal block, so it can be any connection.
3. Setting of AC reactor or DC reactor
When the input power is connected with capacitive load, it will generate high peak
current in power grid.
If don’t take appropriate measures, the peak current may damage inverter rectifier
and other power modules.
When there is high peak current in power grid, please connect 3PH AC reactor
(optional) on the power input side of inverter, or install DC reactor on the terminal of
DC reactor.
Therefore, it not only suppresses peak current, but also improves power factor.
4. Setting of Surge Protection Device (SPD)
When there is inductive load near the inverter (electromagnetic contactor,
electromagnetic valve, electromagnetic coil, electromagnetic circuit breaker), please
install SPD at two ends of its coil.
5. Wiring of inverter and electric motor
Please check whether rotate forwards when confirm the command of forward.
When the motor is reverse rotation, exchanging any two of U, V, W output
terminals can change rotation direction of the motor.
Use jog function to confirm forward and reverse rotations.
