ZN85

Overview

1. 1 Suitable for three-phase AC 50Hz, 35kV power system for switching various loads of diferent maturesand for occasions with frequent operations.
1.2 For the protection and control of electrical equipment used in industrial and mining, enterprises, powerplants and substations.
3 Suitable for KYN61-40.5 handcart type switchgear.1.4 Standard
GB/'T 1984 High-voltage alternating-current circuit-breakersGB/T 11022 Common specifcations for high-voltage switchgear and controlgear standardDL'T 402 High-voltage alternating-current circuit-breakers

Type Designation

Technical Parameters

Operating Conditions

4.1 The ambient air temperature does not exceed +409C, and the mean value measured within 24h does notexceed 35oC, and the min. ambient air temperature is -l5°C;
4.2 Altitude:≤ 1,000 meters.
4.3 There is no obvious pollutions such as dust, smoke, corrosion or flammable gas, steam gas, or salt sprayin the ambient air.
4.4 Humidity conditions: The daily mean is not greater than 95%, and the monthly mean is not greater than90%6; the mean value of water steam pressure is not greater than 2.2KPa, and the monthly mean of watersteamn pressure is not greater than 1.8KPa.
4.5 Vibration or earthquake from the outside ofthe switchgear or controlgear can be omitted.4 .6 The magnitude of the electrom agnetic interference induced in the secondary system does not exceed 1 .6kV
4.7 Special working conditionsIf installed at the place where the altitude exceeds 1,000 meters, the ambient air temperature is out ofthe limit value specifed by the normal working conditions or condensation may easily occur due to highhumidity, please contact our company for customization.

Structure And Working Principle

5.1 Reliable modular spring operating mechanismThe spring operating mechanism of circuit breaker is up-down arranged with manual and electric energystorage functions. The circuit breaker features with small size, high overall rigidity, consistent operatingperformance, and high stability.
5.2 Main conductive circuit is of the insulating cylinder typeMain conductive circuit of circuit breaker is of the sleeve type structure. The vacuum arc extinguishchamber of the primary main conductive circuit of circuit breaker is aranged in the closed insulatingcylinder that is made of epoxy resin having reliable electromechanical properties through the advancedAPG forming process. This insulating cylinder is used not only for installation support but also forinsulation between phases and to earth, By fully considering the operating requirements of the nationalstandard and harsh working conditions, this insulating cylinder is designed not only to prevent theinfluence of the external environment on the vacuum arc extinguish chamber but also to prevent dust andforeign matters from entering main circuit. Furthermore, there is high resistance kept for voltage effecteven in the damp-heat and severe dirty environment.
S.3 Standard opening and closing function moduleThe circuit breaker is characterized by use of modular spring operating mechanism for convenientmaintenance, fast replacement, and short power outage time for inspection, In addition, as the modulamechanism used as spare part has been lubricated with special grease and well-adjusted with a longstorage period, no adjustment is required for replacement of the entire mechanism without changingthe dynamic property of circuit breaker, minimizing the maintenance and inspection workload duringoperation. The defective modular structure can also be as spare part after repair and maintenance by themanufacturer.
5.4 Excellent handcart interchangeability and adaptationThe external dimensions of circuit breaker are basically consistent with those from the peer manufacturerso that their handcarts can be interchanged conveniently for strong adaption and wide application. Thecircuit breaker is of the floor-mounted handcart type structure for convenient field inspection and regularmaintenance by user without transferring handcart, suitable for KYN61-40.5 high-voltage completeswitchgear.

Qutline and Installation Dimensions

Electrical Schematic Diagram