ZW38-40.5 Outdoor AC High Voltage Vacuum Circuit BreakerDetailed product description：

ZW38-40.5 elevated porcelain column outdoor high-voltage vacuum circuit breaker is a three-phase AC 50Hz high-voltage switchgear mainly used for control and protection of 40.5kV transmission and transformation systems. It can also be used for normal operation and short-circuit protection of urban and rural power grids and industrial and mining enterprises, and can be used as a connecting circuit breaker and opening and closing capacitor group.
This product is equipped with CT19-IVB spring energy storage operating mechanism, which can remotely control electric energy storage, electric opening and closing operations, as well as on-site manual energy storage, manual opening and closing operations.

Main features of ZW38-40.5 outdoor AC high-voltage vacuum circuit breaker

The vacuum arc extinguishing chamber with ceramic shell is placed inside a ceramic sleeve filled with 0.02/0.2MPa (without CT/with CT) SF6 gas at 20 ℃, which can avoid the influence of external environment and is oil-free and resistant
Pollution, anti condensation, high breaking current, long electrical life. At rated voltage, the short-circuit current of 31.5kA can be continuously broken for 20 times, and the rated current is 2000A. The mechanical reliability is superior, with a mechanical life of 10000 times and the ability to operate frequently. According to user requirements, each product can be equipped with 6-12 current transformers.
The design performance of this product meets the requirements of the national standard GB1984 "AC High Voltage Circuit Breaker" and the requirements of the International Electrotechnical Commission standard IEC56 "High Voltage AC Circuit Breaker", and has a structure
Simple, small in size, and easy to install and maintain.

Environmental conditions for use
Environmental temperature: maximum temperature+40 ℃; The minimum temperature is -30 ℃.
Relative humidity: Daily average relative humidity ≤ 90%; Monthly average relative humidity ≤ 95%.
Altitude: Under normal usage conditions, the altitude should not exceed 1000m (referred to as flat prototype); Special usage conditions: altitude not exceeding 3000m (referred to as high prototype); The wind speed does not exceed 34m/s (corresponding to 700Pa on the surface of the cylinder); The seismic intensity shall not exceed 8 degrees (horizontal acceleration 0.25g, vertical acceleration 0.125g);
Air pollution level: Level IV; Minimum nominal creepage distance: 31mm/kV.

Main technical parameters of ZW38-40.5 outdoor AC high-voltage vacuum circuit breaker

Project Name	data
Rated voltage (kV)	forty point five
Rated current (A)	two thousand
Rated short-circuit breaking current (kA)	thirty-one point five
Rated short-circuit closing current (kA)	eighty
Rated short-circuit breaking current breaking times (times)	twenty
Rated out of step breaking current (kA)	eight
Breaking current of out of phase ground fault (kA)	twenty-seven point four
Rated operating sequence	Min-0.3s HeFen-180s HeFen
Rated short-circuit duration (s)	four
Rated short-time withstand current (kA)	thirty-one point five
Rated peak withstand current (kA)	eighty
Opening time (ms)	3.-65
Closing time (ms)	40-100
Average closing speed (m/s)	1.0±0.35
Average opening speed (m/s)	2.0±0.35
Contact closing bounce time (ms)	≤8
Synchronization of three pole opening and closing (ms)	≤3
Rated inflation pressure of SF6 gas (Mpa)	(Without CT) 0.02	(with CT) 0.2
Circuit breaker weight (kg)	(without CT) 750	1000/1150/1300 (6 CT/9 CT/12 CT)
Note: The circuit breaker is equipped with a CT19 spring operated mechanism, and its electrical schematic, wiring diagram, main technical parameters, and installation form of the mechanism are of the middle hanging type.

ZW38-40.5 Overall dimensions
ZW38-40.5 Elevated Ceramic Column High Layout Vacuum Circuit Breaker with Built in Current Transformer Outline Drawing