May 2014

• R29 series thermal overload relay is mainly suitable for acelectric power system with voltage up to 660V, Current up to 500A, 50-60Hz. It is generally used for the protection of overload and phase-tacking in circuits with three-phase induce motors and is offen made up electro magnetic starters with B series AC contactors.

The circuit breaker adopts to three-phase procelain pillar-type structure and outdoor design. Three phases commonly matches with a spring operating mechanism, Centre location , Three phase linkage, so the appearance is novel and exquisite. The circuit breaker takes SF6 gas as insulation & arc-extinguish medium , SF6 gas of three phases will connect during operation and the gas pressure and density are monitored by a pointer-type density controller.

• JR28 series thermal relay is suitable for using in the circuit rated voltage up to 660V, Rated current 93A  AC 50/60Hz, For over-current protection of acmotor. the relay has the differential mechanism and temperature compensation and can plug in CJX2series AC contactor. The product conforms to IEC6094-4-1 standard.

ZN85A-40. 5(3AV7)is an Indoor high voltage ac vacuum circuit breaker, it is a new breaker which is made in partnership with xi'an hv research ltd annd our company. The breaker is applied to the systems of 3-phase AC 50HZ, 35KV in industral and mineral enterprises, Power plant and substations for cutting and closing load current, Overload current and failure current. It is also suitable for the sites where frequent operations are required. The breaker conforms to the requirements of the standards of gb1984-1989"high voltage AC breaker", jb/t3855-1996"3. 6-40.