The Xiamen Huadian VEP-40.5 floor-standing circuit breaker retrofit solution adopts a modular operating mechanism and is designed to provide a reliable and flexible solution for medium- and high-voltage switchgear renovation projects. It is suitable for various industrial and mining enterprises, power grid equipment, and power distribution applications, meeting different equipment upgrading and replacement requirements.

The circuit breaker can be configured as a withdrawable handcart unit for use with KYN61-40.5 switchgear, or as a fixed unit equipped with the corresponding mechanical interlocking components for fixed-type switchgear such as XGN. The modular design allows flexible adaptation to different cabinet structures and installation requirements.

In addition, the VTZ series operating mechanism can be applied to the retrofit of existing vacuum circuit breakers from a number of international brands. Through optimized structural adaptation and customized configuration, the solution can help customers upgrade existing equipment, extend its service life, and reduce the overall cost and complexity of switchgear replacement projects.

Product Specifications

Specification Sheet

No.	Name	Unit	Data
1	Rated Voltage	kV	33/40.5
2	Rated Frequency	Hz	50
3	Rated current	A	630/1250/2000/2500/3150
4	Rated power-frequency withstand voltage	kV	95
5	Rated lighting impulse withstand voltage	kV	185
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	All0wable wearing thickness of contacts	mm	≤3

Mechanical Characteristics

No.	Name	Unit	Data
1	Clearance between open contacts	mm	19±2
2	Over-travel	mm	4±1
3	Average closing speed	m/s	0.8±0.2
4	Average opening speed(average speed at 6mm of initial opening)	m/s	1.7±0.3
5	Rated added external contact final force	N	3100±200N(25kA) 3400±300N(31.5kA) 4500±250N(40kA)
6	Make time	ms	30～70
7	Breaking time	ms	20～50
8	Contact bouncing duration at closing operation	ms	≤2
9	Closing/opening no-simultaneity of 3-phase contacts	ms	≤2

Product Advantages

Xiamen Huadian VEP-40.5 floor-standing circuit breaker Retrofit has many advantages:

Circuit Breaker Performance

Meets E2-C2-M2 performance requirements, ensuring reliable electrical and mechanical endurance as well as stable switching performance under demanding operating conditions. This makes the circuit breaker suitable for applications requiring frequent operation and reliable fault interruption.
Easy Maintenance

Simple and convenient maintenance: the use of modular mechanism, the replacement of the closing and closing coils do not need to dismantle the rest of the components, the user can be easily replaced, and no need to test and adjust after the replacement, so that the later operation and maintenance is more convenient.
High Conductivity

The conductive circuit is reasonably designed to meet the temperature rise requirements at 1.1 times the rated current, ensuring reliable current-carrying capacity and stable electrical performance.
Perfect Replacement

This transformation program can be a perfect replacement for Xiamen VEP-40.5 old products, easy to maintain, replace, and solve the urgent needs of electricity customers.

Product Applications

Xiamen Huadian VEP-40.5 floor-standing circuit breaker Retrofit has many applications:

Power plants

Industrial fields

Power grid systems

Power infrastructures

Product Outline Drawing

Xiamen Huadian VEP-405 floor-standing circuit breaker Retrofit price

Secondary Wiring Diagram

Xiamen Huadian VEP-405 floor-standing circuit breaker Retrofit facory

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Products

Xiamen Huadian VEP-40.5 Floor-standing Circuit Breaker Retrofit

Product Specifications

Product Advantages

Product Applications

Product Outline Drawing

Secondary Wiring Diagram