Modular operating mechanism of the VTZ-12 is an application instance of the VTZ series spring operating mechanism for 12kV.

Product Specifications

Specification Sheet

No.	Name	Unit	Data
1	Rated Voltage	kV	7.2~12
2	Rated Frequency	Hz	50/60
3	Rated Current	A	630/1250/1600/2000/2500/3150/4000/5000
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	25/31.5/40/50
7	Mechanical Endurance	Times	30000
8	Standard Operating Sequence	-	O-0.3s-CO-180s-CO

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) 4800±300N(40kA) 6000±500N(50kA)
6	Closing Time	ms	30-70
7	Opening Time	ms	20-50
8	Contact Bouncing Duration at Closing Operation	ms	≤2
9	No-Simultaneity of Closing/Opening Operations of 3-Phase	ms	≤2

Product Advantages

Modular operating mechanism of the VTZ-12 has many advantages:

Performance of circuit breaker：

E2-C2-M2

Easy Maintenance:

The modular mechanism design allows for easy replacement of the closing and opening coils without the need for disassembling other components. This eliminates the need for testing or adjustment after replacement, ensuring that users can replace them independently, making subsequent maintenance more convenient.

High conductivity:

Reasonable design of the conductive circuit, to meet the level of 1.1 times the rated current temperature rise.

Wide application range:

The series covers a wide range of rated currents from 630A to 5000A and breaking currents from 20kA to 50kA, with a maximum operating altitude of 4500 meters and an operating temperature range from -40°C to 40°C.

Custom Design Support:

We offer customization services based on user habits, retrofitting of old switches, and cooperation in new product development.

Product Components

Modular operating mechanism of the VTZ-12 consists of the following parts:

Modular Operating Mechanism manufacturer

Spring Operating Mechanism of the VTZ Series

Suitable for withdrawable and fixed circuit breakers with rated currents ≤5000A and breaking currents ≤50kA.

Frame (Housing)

It is used to fix and install the spring operating mechanism, the transmission parts, and the support parts of the primary conductive circuit. The dimensions of the frame vary depending on the form and size of the switchgear. Common widths for withdrawable switchgear are 650mm, 800mm, 1000mm.

Modular Operating Mechanism for sale

Modular Operating Mechanism in stock

Chassis Truck

For withdrawable circuit breakers, it is used to move the breaker body from the test position to the working position, ensuring the engagement of the moved and fixed contacts. Common widths for withdrawable switchgear are 650mm, 800mm, 1000mm.

Secondary Wiring

Withdrawable circuit breakers use plug-socket connections to connect the secondary control circuit to the switchgear. Fixed circuit breakers use terminal connections. The secondary wiring serves as the communication bridge between the breaker body and the switchgear, and can be modified according to user requirements.

Modular Operating Mechanism price