VTZ-12KF Fast Vacuum Circuit Breaker (Tongzhong Electric special model) is an indoor switchgear for rated voltage 12kV, AC 50/60Hz. It adopts modular operating mechanism and is suitable for various industrial and mining enterprises and power grid equipment. The trolley unit is used in conjunction with the KYN28A-12 switch cabinet. It can also be used as a fixed unit and equipped with corresponding mechanical interlocking for XGN2 and other fixed cabinets.

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 lightning 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	Times	E2
11	Mechanical endurance	Times	10000
12	Standard Operating sequence	-	O-0.3s-CO-180s-CO
13	All0wable wearing thickness of contacts	mm	≤3

Mechanical Characteristics

No.	Name	Unit	Data
1	Clearance between open contacts	mm	9±1
2	Over-travel	mm	3.5±0.5
3	Average closing speed	m/s	0.7±0.2
4	Average opening speed(average speed at 6mm of initial opening)	m/s	1.4±0.2
5	Rated added external contact final force	N	2500±200N(25kA) 3100±200N(31.5kA)
6	Make time	ms	15～35
7	Breaking time	ms	≤10
8	Contact bouncing duration at closing operation	ms	≤2
9	Closing/opening no-simultaneity of 3-phase contacts	ms	≤2

Product Advantages

VTZ-12KF Fast Vacuum Circuit Breaker has many advantages:

Performance of circuit breaker:

E2-C2-M2

High adaptability:

This product is completely consistent with the cabinet switch size of the conventional KYN28-12 series, and does not require special cabinet design, which is suitable for a variety of occasions for transforming the power environment.

High conductivity:

Reasonable conductive circuit design, meeting the temperature rise level of 1.1 times the rated current;

Simple and reliable structure:

permanent magnet mechanism, three-phase independent design;

Products Application

VTZ-12KF Fast Vacuum Circuit Breaker has many applications:

Ⅰ

Power plant

Ⅱ

Industrial field (chemical, steel, petroleum, coal, etc.)

Ⅲ

Power grid system and Power infrastructure

overall outline drawing

VTZ-12KF Fast Vacuum Circuit Breaker in stock

Note: VTZ-12KF fast vacuum circuit breakers are custom-made products. The secondary wiring method needs to be determined based on the user's operating environment.

Shaanxi West Power Tongzhong Electrical Co., Ltd. is a leading manufacturer with over 20 years of experience, specializing in high quality 7 to 40.5kV vacuum circuit breakers, switchgears, and a wide range of electrical products. Our advanced manufacturing process ensures reliable, durable solutions, especially our VTZ series vacuum circuit breakers, which are maintenance-free for up to 20 years. With a team of expert technicians, we excel in R&D, manufacturing, and after-sales service for both high and low voltage equipment, delivering excellence at every stage.

Hot Tags: vtz-12kf fast vacuum circuit breaker, China vtz-12kf fast vacuum circuit breaker manufacturers, suppliers, factory, ZN12 12 Vacuum Circuit Breaker, VS1 12 Vacuum Circuit Breaker with Lateral Operating Mechanism, VTZ 12C Vacuum Circuit Breaker with Lateral Operating Mechanism, medium voltage switch equipment, VTZ 24 Vacuum Circuit Breaker, VTZ CS 12 Vacuum Circuit Breaker with Lateral Operating Mechanism