Product Details

Brief Introduction

Several faults of this series of soft starter for three phase induction motor, cause analysis and solutions.

Fault	Cause of fault	Solutions
Overvoltage protection	Main circuit voltage is too high	1. Check whether the main circuit voltage is too high. 2. Check whether the parameter Q24 of the overvoltage protection value is set correctly.
Undervoltage protection	Main circuit voltage is too low	1. Check whether the main circuit voltage is too low. 2. Check whether the parameter Q26 of overvoltage protection value is set correctly
Phase voltage imbalance	Three-phase power supply voltage imbalance	1. Check whether the main circuit voltage is three-phase unbalanced. 2. Check whether the parameter Q23 of the voltage imbalance protection value is set correctly.
SCR abnormality		Check whether the thyristor is short-circuited.
Leakage blocking		Check the insulation of three-phase winding to ground.
Starting timeout	Starting time is too long	1. Check whether the current limiting signal is set too small. 2. Whether the starting time limit B12 parameter is set too small.
SCR overheat	Internal radiator overheated? Poor ventilation of the machine	1. Check whether the fan works reliably. 2. Reduce the starting frequency. Check whether the control power supply voltage is too low.
Motor temperature	motor temperature detecys by PTC thermal resistor inside the motor is too high	1. Check whether the PTC circuit is closed and the input is connected. 2. Check and correct the cause of high temperature. Restart the motor after it has cooled down enough.
Frequent starting	Starting too often	The start frequency exceeds the set minimum start interval parameter Q09..
Frequency fault	Frequency out of range	Check and change the power supply frequency.
Zero sequence protection		Check that the three-phase leakage exceeds the design value
Tap timeout	Tapping time is too long	The starting time exceeds the set starting time limit parameter B13.

Main Technical Parameters

Item	Basic parameters
Load Type	3-phase high-voltage squirrel-cage asynchronous motor,  synchronous motor
AC voltage	3000---10000VAC
Working frequency	50HZ / 60HZ ± 2HZ
Phase sequence	CMV allows to work in any phase sequence (can be set by parameter)
Bypass Contactor	Contactor with direct starting capacity
Control power	AC/DC(110-220V)±15％

Specifications