SV800/SV800A User Manual 4 Electrical wiring and precautions
53
Fig. 4-17 Cable wiring
Requirements for leakage current
1) Due to the output of the frequency inverter is high-speed pulse voltage, it will lead to
high-frequency leakage current generates. In order to prevent electric shock and leakage fire,
please install a leakage circuit breaker with the inverter.
2) The leakage current generated by each frequency inverter is about 100 mA, so the induced
current of the selected leakage circuit breaker should be to larger than 100 mA.
3) High-frequency pulse interference may cause malfunction of the leakage circuit breaker after
interference. Therefore, leakage circuit breaker with high frequency filtering should be selected.
If several inverters need to be installed, each inverter should be provided with a leakage circuit
breaker.
The factors that will affect the leakage current as follows:
Frequency inverter capacity
Carrier frequency
The type and length of motor cable
EMI filter
When the leakage current generated by the frequency inverter causes the leakage breaker to
action, the following steps should to be done:
Increasing the sensitivity current value of the leakage breaker
Replace another leakage circuit breaker which has high-frequency inhibition effect.
Decrease carrier frequency
Shortening the length of the output cable
Add leakage suppression devices
Advices and solutions to Common EMC Interference Problem
The frequency inverter product belongs to strong interference device. Interference problem may
still occurs due to improper wiring or grounding during using. When the inverter interferes with
other devices, the following solutions can be adopted.
Summary of Contents for SV800 Series
Page 8: ......
