
YP5000 Soft Starter User Manual
V1.0
2.4 Main Circuit and Terminal
Table 2-4-1 Main circuit and terminal wiring
Terminal Name
AC Main Circuit Power Input
Terminal Symbol
R. S. T
L21. L22. L23
U. V. W
Description
Connected with three-phase
AC Power Supply
Soft Starter Output Terminal Connected with three-phase
asynchronous electric machine
External Bypass Contactor
Terminal
Connected with bypass
contactor
Grounding Terminal Grounding
G
Main circuit power input terminals(R. S. T)
1. Main circuit power input terminals R, S, T are connected to the three-phase
AC power supply by line protection circuit breakers or circuit breakers with
leakage protection regardless of the connected phase sequence.
2. Don’t use the main circuit power ON / OFF method to control the soft start
operation and stop. After the soft starter is energized, select the control terminal
on the soft starter or the RUN and STOP keys on the keyboard panel to control.
3. Do not connect with single power supply.
Soft starter output terminals(U. V. W)
1. The soft starter output terminals are connected to the three - phase motor in
the correct phase sequence. If the direction of rotation of the motor is not
correct, you can exchange any two phases wiring of U, V, W.
2. The soft starter output side can not be connected to the phase-in capacitor
and the energizing absorber.
3. When the line between the soft starter and the motor is long, the distributed
capacitance between the wires will produce a large high frequency current,
which may cause the soft start overcurrent trip, the leakage current increases,
and the current display accuracy is poor. Therefore, it is recommended that the
motor connection should not exceed 50 meters.
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