Chapter 4 Electrical Installation
Shenzhen Hpmont Technology Co., Ltd.
-12-
HD09 Series User Manual V1.1
4.1.6
Leakage protection switch
HD09 inverter built-in EMI filter, the inverter can be connected to the case of power protection can
reduce the external radio frequency interference, while the protection of the ground to produce 10mA
AC leakage current.
In the case of low leakage current applications, the connection between the built-in EMI filter and the
protective ground wire can be disconnected, and the leakage current from the protective ground wire
is less than 1mA AC after disconnection. Disconnect the built-in EMI filter as shown below.
The leakage current protection switch (ELCB / RCD) is installed on the input side of the inverter,
disconnect the built-in EMI filter to prevent mistake action of the ELCB / RCD.
The ELCB / RCD action is related to the fault current waveform it detects, and there are three types:
•
AC type: Detects AC fault current and is not suitable for frequency converters.
•
Type A: Detects AC fault current and pulsating DC fault current, only applies to single-phase power
input inverter.
•
Type B: Detection of AC fault current, pulsating DC fault current and smooth DC fault current, three-
phase power input required that type.
EMI filter connected
(default)
EMI filter disconnected
(dismentle screws)