ZN39-40.5 vacuum circuit breaker is a three-phase AC 50Hz, rated voltage 40.5kV indoor high-voltage device. It is matched with JIN1-35 and GBC-35 switchgear, and can be used for accepting, controlling and protecting electric energy in industrial and mining enterprises, power plants and substations.

The circuit breaker adopts air insulation method to meet the insulation requirements of normal operation conditions, with reasonable overall layout, simple structure and convenient installation and adjustment.

The operating mechanism adopts electromagnetic mechanism CD10-II or spring mechanism CT19N, which can be operated by AC or DC or manually.

The circuit breaker has a simple and reliable mechanical interlocking interface, which is convenient for realizing the "five-proof" requirements of the switchgear.

Product Specifications

Specification Sheet

No.	Name	Unit	Data
1	Rated Voltage	kV	40.5
2	Rated Frequency	Hz	50
3	Rated Current	A	630/1250/1600/2000/2500
4	Rated Power Frequency Withstand Voltage	kV	95(Common value) /95(Across the isolating Distance)
5	Rated Lightning Impulse Withstand Voltage	kV	185(Common value) /185(Across the isolating Distance)
6	Rated Short-Circuit Breaking Current	kA	25/31.5/40
7	Rated Short-Circuit Making Current (Peak)	kA	63/80/100
8	Rated Withstand Current (Peak)	kA	63/80/100
9	Rated Duration of Short-Circuit	s	4
10	Operating Cycles at Rated Short-Circuit Breaking Current	Times	E2
11	Mechanical Endurance	Times	10000
12	Standard Operating Sequence	-	O-0.3s-CO-180s-CO
13	Allowable Wear Thickness of Contact	mm	≤3

Mechanical Characteristics

No.	Name	Unit	Data
1	Clearance between Moved and Fixed Contact	mm	22±2
2	Contact Overtravel	mm	6±1
3	Average Closing Speed	m/s	0.6±0.2
4	Average Opening Speed (Average Speed of First Opening at 6mm)	m/s	1.4±0.3
5	Rated ContactPressure	N	3100±200N(25kA/31.5kA)
6	Closing Time	ms	30～120
7	Opening Time	ms	20～75
8	Contact Bouncing Duration at Closing Operation	ms	≤3
9	No-Simultaneity of Closing/Opening Operations of 3-Phase	ms	≤2

Product Advantages

ZN39-40.5 vacuum circuit breaker has many advantages:

1. Performance of circuit breaker: E2-C2-M2

2. Structural features: the circuit breaker adopts air insulation to meet the insulation requirements of normal operating conditions, reasonable overall layout, simple structure, easy to install and adjust.

3. Mechanism and interlocking: The operating mechanism adopts spring mechanism CT19N, which can be operated by AC or DC and manually. The circuit breaker has a simple and reliable mechanical interlocking interface, which is convenient to meet the "Five-prevention" requirements of the switchgear.

4.Wide range of use: adapting to the harsh environment, the product is able to withstand a low temperature of -25℃. Meet the requirements for use at an altitude of 2000 meters.

Product Applications

VTZ-12(K59) vacuum circuit breaker has many applications:

Power plants

Industrial fields (chemical industry, steel, petroleum, coal, etc.)

Power grid systems

Power infrastructures

Product Outline Drawing

VTZ-12K59 Vacuum Circuit Breaker manufacurer

Secondary Wiring Diagram

VTZ-12K59 Vacuum Circuit Breaker supplier

Special Contact

VTZ-12K59 Vacuum Circuit Breaker factory

Our K-59 circuit breaker is compatible with the most common contacts in the Central Asia region, supporting rated currents of 630A, 800A, 1000A, 1250A, 1600A, and 2000A.

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