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Home > Products > Indoor HV Vacuum Circuit Breaker > Yfgzn35vd-40.5-Vacuum Circuit Breaker with Disconnector

Yfgzn35vd-40.5-Vacuum Circuit Breaker with Disconnector

Basic Info

Model No.:  YFGZN35VD-40.5

Product Description

Model NO.: YFGZN35VD-40.5

Operation: Electric Type

Arc-extinguishing Medium: Vacuum

Poles Number: 3

Function: Overcurrent Protection

Trademark: YF

Breaking Capacity: High Voltage Circuit Breakers

Speed: High-Speed Circuit Breaker

Installation: Fixed

Type: Circuit Breaker

Certification: ISO9001-2000, IEC & GB

Origin: Jiangyin Yunfeng, China

Product Overview

YFGZ35-40.5D/T1250-25 indoor AC HV Vacuum Circuit Breaker with disconnector is applied in the three-phase AC 50 Hz network with the rated voltage40.5kV. It is a vacuum circuit breaker with obvious isolating fracture in conformity to GB1984-2003. It can be also applied to the power system as an independent electrical unit for breaking load current, overload current and short-circuit current.It is also applied to the situation with different nature load and frequent operation. It has the function of protection and control for electrical installations industry and mining enterprises, power plant and power transformation substation.

Model Specification

Yfgzn35vd-40.5-Vacuum Circuit Breaker with Disconnector

Yfgzn35vd-40.5-Vacuum Circuit Breaker with Disconnector


a.simple but reasonable structure

b.small operation force

c.reliable performance

d.convenient maintenance

Yfgzn35vd-40.5-Vacuum Circuit Breaker with Disconnector

Service Conditions


2.Ambient temperature-25ºC-+ 50ºC;

3.The daily average of relative humidity shall not be larger than 95% and the monthly average shall not be larger than 90%:

4.The ambient air shall not be subject to the obvious pollution such as corrosive or combustible gas and steam;

5.The site without fire hazards and explosion hazards;

6.No frequent severe vibration

Yfgzn35vd-40.5-Vacuum Circuit Breaker with Disconnector

Main Technical Parameters

Serial No. Item Unit YFGZ35-40.5 Vacuum Circuit Breaker
1 Rated voltage kV 40.5
2 Rated frequency Hz 50
3 Rated current A 630/1250
4 Rated short-circuit breaking current kA 25/31.5
5 Rated short-circuit making current kA 63/80
6 Rated short-time withstand current(thermal stability current)/duration kA/s 25/4 31.5/4
7 Rated peak withstand current(dynamic stability current)/duration kA- 63 80
8 Rated short-circuit breaking current breaking time time 30
9 Rated 1 min power-frequency withstand voltage(effective value) kV 95
10 Rated lightning impluse withstand voltage(peak) kV 185
11 Rated operation sequence 0-0.3s-co-180s-co
12 Clearance between open contacts mm 18±1
13 Overtravel(spring compression length of contact) mm 3.5±0.5
14 Contact closing bounce time ms ≤3
15 Three-phase opening and closing asynchronization ms ≤2
16 Average opening speed m/s 1.6±0.2
17 Average closing speed m/s 0.65±0.2
18 Mechanical life time 10000
19 Rated current breaking times(electrical endurance) time 2000
20 Main loop resistance μΩ ≤120
21 Gross thickness of allowable wear of dynamic and static contact mm 3

Yfgzn35vd-40.5-Vacuum Circuit Breaker with Disconnector

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Product Categories : Indoor HV Vacuum Circuit Breaker