原理
electronic overload relay
Type 2
electronic overload relay EOCR-SSD
Type 3
overload relay EOCR-SSD
Type 4
power relay EOCR-SSD
Type 5
time relay EOCR-SSD
Type 6
electronic over-current relay EOCR-SSD
Type 7
electronic voltage relay EOCR-SSD
Type 8
monitoring relay EOCR-SSD
condition
original and new EOCR-SSD