ABB 隻RCD帶AP-R都幾貴吓,其實有冇需要買帶AP-R?
5ocean 發表於 2020/5/1 02:29 
一隻水氣掣隨時用上幾十年,如果幫你解決到煩惱嘅話只係少數一筆
Often disturbances on the mains can cause an RCD to trip even though no true earth fault is present. The disturbances are often caused by transient over voltages associated with loads starting, stopping or being switched, electric motors, fluorescent lighting systems etc. Over voltages due to either direct or indirect lightning events are also know to cause unwanted tripping of RCD protection. |