VTZ/CS-12 vacuum circuit breaker with lateral operating mechanism is an indoor switchgear for rated voltage 12kV and AC frequency 50/60Hz. Featuring a narrow modular design, it is suitable for industrial and mining enterprises, power plants, medium and small generators for power transmission, and secondary substations within the power system for power reception and transmission, as well as the startup of large high-voltage motors.

Product Specifications

Specification Sheet

No.	Name	Unit	Data
1	Rated Voltage	kV	12
2	Rated Frequency	Hz	50/60
3	Rated Current	A	630/1250
4	Rated Power Frequency Withstand Voltage	kV	48(Across the Contact Gaps) / 42(To Ground)
5	Rated Lighting Impulse Withstand Voltage	kV	75
6	Rated Short-Circuit Breaking Current	kA	25/31.5
7	Rated Short-Circuit Making Current (Peak)	kA	63/80
8	Rated Withstand Current (Peak)	kA	63/80
9	Rated Duration of Short-Circuit	s	4
10	Operating Cycles at Rated Short-Circuit Breaking Current	Cyles	E2
11	Mechanical Endurance	Times	10000
12	Standard Operating Sequence	-	O-0.3s-CO-180s-CO O-180s-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	9±1
2	Contact Overtravel	mm	3.5±0.5
3	Average Closing Speed	m/s	0.7±0.2
4	Average Opening Speed (Average Speed of First Opening at 6mm)	m/s	1.1±0.2
5	Rated Contact Pressure	N	2500±200N(25kA) 3100±200N(31.5kA)
6	Closing Time	ms	35～70
7	Opening Time	ms	20～50
8	Contact Bouncing Duration at Closing Operation	ms	≤3
9	No-Simultaneity of Closing/Opening Operations of 3-Phase	ms	≤2

Product Advantages

VTZ/CS-12 vacuum circuit breaker with lateral operating mechanism has many advantages:

Breaker performance:

E2-C2-M2

Stability and reliability:

1). Achieves visualization of the main conductive plug connection state and process in withdrawable type switchgear.

2). Achieves visibly apparent primary air isolation breaks in withdrawable type switchgear.

3). The smallest volume among similar products.

Excellent insulation performance:

The main conductive circuit adopts APG high-strength epoxy resin composite insulated cylinder, which exceeds the IEC standard in terms of insulation performance.

High adaptability：

The three phases of the circuit breaker are arranged from inside to outside, with the minimum cabinet depth of 550mm, making it suitable for various environments. The circuit breaker can be equipped with a mechanical interlock for easy interlocking with the isolating switch and grounding switch of cabinet, ensuring high safety.