HvacrNews-Coowor1 天
SIKELAN Refrigeration Compressor ADW91, WQ series,R134A LBP, 220V, Freezer/refrigerator ...
SIKELAN Refrigeration Compressor R134a 110-120V 60HZ MD-GQR16TZD 200 Piece (Min.Order) SIKELAN Refrigeration Compressor R134a 110-120V 60HZ MQ-GQR11TZD 200 Piece (Min.Order) ADW51 R134a 220v SIKELAN ...
Electric Energy Online5 天
A Brief History of Electric Utility Automation Systems
The transformer output was 120 Volts AC and nominal 5 Amperes AC; these values were converted by transducers to +/- 1 milliampere DC. The RTU had analog devices to convert ... In the 1980s, ...