NJBK9 Datasheet PDF

NJBK9 Motor protection relay 1. General NJBK9 series motor protection relay (hereinafter referred to as “Pro-tecter”) is used for overload protection, locked rotor protection, phase failure protection, three-phase unbalance protection, grounding protection and PTC temperature protection for AC electromotors of a frequency of 50Hz with a rated insulation voltage of up to 690V and a rated operating current of 1A-200A during long-term and discontinuous operation. This protector is provided with RS485 interface and 4-20mA current loop transmitter interface for network communication and performs remote monitor & control on the motor and fault query through opper computer. This protecter is usually used to combine with AC contactor. Standards: IEC 60947-4-1 2. Type designation N JBK 9 - □ □ □/□/□ Relay Protection Relay Control power supply voltage (AC220V, AC380V, AC/DC100V~240V) Rated current: 5, 10, 30, 50, 200 None: 4mA~20mA analog transformation is not available M: 4mA~20mA analog transmission None: Communication interface is not available T: RS485 communication interface Enclosure grade: 50, 200 Design sequence No.