40.5KV Autometic Closing Vacuum Circuit Breaker 40.5KV

LiuGao proudly stands as a leading indoor vacuum circuit breaker manufacturer, featuring the40.5KV Autometic Closing Vacuum Circuit Breaker 40.5KV—an indoor high-voltage electrical device with a rated voltage of 40.5kV, operating on three-phase AC 50Hz. Tailored for industrial and mining enterprises, substations, and transmission and distribution systems, this breaker provides reliable control and protection switching. Its exceptional suitability for applications in metallurgy and electric arc steel-making, where frequent operations are essential, sets it apart. Compliant with the GB 1984-89 "AC High Voltage Circuit Breaker" standard, LiuGao invites you to experience cutting-edge solutions that redefine reliability and performance in indoor vacuum circuit breakers.

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Product Description

LiuGao stands as a dedicated indoor vacuum circuit breaker manufacturer,ZN23-40.5 Vacuum Circuit Breakers are indoor high-voltage power distribution devices designed for a rated voltage of 40.5kV and operate on three-phase AC 50Hz. They can be seamlessly integrated with JYN1-35 and GBC-35 switchgear. These circuit breakers are well-suited for controlling and protecting power transmission and distribution systems in facilities like power plants and substations. Particularly, they excel in applications with frequent operations, such as those in metallurgy and arc steel industries.

Featuring a handcart type design, the ZN23-40.5 Vacuum Circuit Breakers boast a well-thought-out structure for easy maintenance. They come equipped with either the CD10-Ⅱ electromagnetic operating mechanism or the CT19-BN spring operating mechanism. These breakers are specifically designed for installation in high-voltage switchgear like GBC-40.5, JYN1-40.5, and other high cabinets.

40.5KV Autometic Closing Vacuum Circuit Breaker 40.5KV Operating Environment

1. The upper limit of ambient air temperature is not higher than +40"C, and the lower limit is not lower than -10°C (storage and transportation at -30°C are allowed):

2. In areas where the altitude does not exceed 1000m, when the product is used in a 7.2kV system, the applicable altitude can be increased by up to 3000m;

3. Relative humidity: the daily average is not more than 95%, and the monthly average is not more than 90%;

4. Saturated vapor pressure: the daily average value is not more than 2.2x 103MPa, the monthly average value is not more than 1.8x 103MPa, and condensation may occur when the temperature drops sharply during the humidity period;

5. The installation site should be free from frequent violent vibrations;

6. The surrounding air should not be significantly polluted by corrosive or flammable gases and water vapor;

7. The installation site should be kept dry and clean;

8. The seismic intensity should not exceed 8 degrees.

40.5KV Autometic Closing Vacuum Circuit Breaker 40.5KV Specification

No.	Item	Unit	Data
1	Rated Voltage	Kv	40.5
2	Rated Insulation(1min power frequency withstand voltage)	Kv	95
3	Rated Insulation(Rated lightning impulse withstand voltage)	A	185
4	Rated Frequency	Hz	50
5	Rated Current	A	630 / 1250/ 1600 / 2000 / 2500
6	Rated Short-circuit Breaking Current	Ka	25 / 31.5
7	Rated Peak Withstanding Current	Ka	63 / 80
8.a	Rated short-circuit making current	Ka	63 / 80
8.b	Rated Short-circuit Current Breaking Times	t	20
9	Breaking Time	ms	≤80
10	Rated Thermal Stabilization Time	s	4
11	Rated Sequence of Operations	/	O-0.3s-CO-180s-CO
12	Rated Operating Voltage	V	AC110 / AC 220 / DC110 / DC 220
13	Rated Working Current of Closing and Opening Coil	/	1.05(110V) / 0.96(220V)
14	Phase Center Distance	mm	300±1.5 / 380±1.5 / 440± 1.5
15	Allowable Wear Thickness of Contacts	mm	≤3
16	Main Circuit Resistance for Each Phase	μΩ	80
17	Mechanical Lifetime	F	10000

No.	Item	Unit	Data
1	Contact Distance	mm	20±2
2	Overtravel	mm	4±1
3	Average Closing Speed	m/s	0.6±0.2
4	Average Opening Speed	m/s	1.6±0.3
5	Closing Time	ms	50~85
6	Opening Time	ms	40~85
7	Closing Contact Bounce Time	ms	≤3
8	Three-phase Closing and Opening in Different Phases	ms	≤2
9	Buffer Stroke	mm	17