BY-4C type voltage relayDetailed product description：

1. Purpose
BY-4C voltage relay is used in electrical control equipment, refrigeration equipment, and electrical control circuits as overvoltage or undervoltage protection.
2. Structural characteristics
The BY-4C voltage relay is a transistor type. The shell structure adopts HK-1 (protruding rear wiring) and HK-1Q (protruding front wiring). The external dimensions, opening dimensions, etc. are shown in the appendix diagram of this manual.

3. Main technical data of BY-4C voltage relay

*Communication rated value		undervoltage adjustment range	overvoltage adjustment range	power consumption （VA）	Contact form	Control capacity （kVA）
Voltage (V)	Frequency (Hz)
24，48 110，127 220，380	50 or 60	1%~20%	1%~10%	two point seven	2 Conversion	one point one

4. Rear terminal wiring diagram