ZW32-17.5 type permanent magnet vacuum circuit breakerDetailed product description：

The ZW32-17.5 permanent magnet vacuum circuit breaker adopts a unique design and high reliability permanent magnet mechanism. This circuit breaker is mainly used in the 17.5kV medium voltage overhead power grid as a means of breaking and closing load currents, overload currents, and short-circuit currents; Suitable for the construction and renovation of power equipment in urban and rural power grids, mines, and railways. ZW32-17.5 permanent magnet vacuum circuit breaker complies with the national standard GB1984 "High Voltage AC Circuit Breaker". According to the International Electrotechnical Commission standard IEC62271-100, within the technical parameter range and normal use conditions of circuit breakers, they can meet various operations of the power grid under normal or accident conditions, including making and breaking short-circuit currents.  

Terms of Use
1. Normal usage conditions
a) The ambient air temperature shall not exceed 40 ℃, and the average value measured within 24 hours shall not exceed 35 ℃, with a minimum ambient air temperature of -40 ℃;
b) Altitude: not exceeding 2000m;
c) The surrounding air can be polluted by dust, smoke, corrosive gases, steam, or salt spray, with a pollution level of IV;
d) Wind speed not exceeding 34m/s;
e) Vibration or ground motion from outside the switchgear and control equipment can be ignored.
2 Special usage conditions
If the above normal usage conditions are not met, the user needs to negotiate with the manufacturer to reach a consensus.  

Technical characteristics of ZW32-17.5 permanent magnet vacuum circuit breaker
The product design complies with national standards such as GB1984-2003, power industry standards, and International Electrotechnical Commission standards such as IEC62271-100.
2. Compact structure, lightweight design, with a minimum phase spacing of 280mm, easy to install.
The permanent magnet mechanism of the 3 products has a high lifespan of over 50000 cycles, making it particularly suitable for situations that require high mechanical lifespan and frequent operation. Maintenance free throughout the entire product lifespan
The specially designed permanent magnet mechanism has undergone theoretical calculations and multiple verifications and improvements through advanced software, and its output characteristics can well meet the requirements of vacuum arc chamber opening and closing.
The primary conductive part of the product adopts a fixed sealed pole design, with the inside of the fixed sealed pole made of epoxy resin and the outside made of silicone rubber. It has high insulation strength and also has good resistance to outdoor environments. It can resist aging, corrosion and ultraviolet rays, and is suitable for use in various outdoor environment conditions.
The shell is designed with full stainless steel or coated with outdoor paint. Can ensure long-term use outdoors without rusting.
7 products can be equipped with zero sequence current transformers to form ground fault protection in conjunction with the controller.
The 8 products are equipped with voltage sensors that can monitor the voltage of each pole and achieve zero sequence voltage detection to determine the direction of grounding faults.
9 companies have years of experience in designing and producing permanent magnet mechanisms and permanent magnet controllers, and possess core technologies in controllers and mechanisms. Can achieve perfect coordination between the mechanism and the controller.  

Main technical parameters of ZW32-17.5 permanent magnet vacuum circuit breaker
The main technical parameters of the product are shown in Table 1.
Rated voltage kV 17.5
Rated insulation level 1 minute power frequency withstand voltage 42
Lightning impulse withstand voltage 75
3 rated frequency Hz 50
4 Rated current A 630 1250 1600 2000 2500 3150 4000
5 rated short-time withstand current kA 20, 25, 31.5, 40
6 rated peak withstand current 50, 63, 80, 100
7 rated short-circuit duration s 4
Rated power supply voltage V AV/DC 220 for 8-turn on/off devices and auxiliary circuits
9 rated short-circuit breaking current kA 20, 25, 31.5, 40
10 rated short-circuit closing current kA 50, 63, 80, 100
11 Rated operating sequence O-0.3s-CO-180s-CO
12 electric life E2 level
13 mechanical life cycles M2 level (50000)