Alternative Design Of Siemens

VTZ-12 type indoor high-voltage vacuum circuit breaker (special model for Tongzhong Electric) is used for indoor switchgear with rated voltage of 12kV, AC 50/60Hz, adopting modularized actuating mechanism, suitable for various industrial and mining enterprises, power grid equipment, handcart unit and KYN28A-12 type switchgear supporting the use of the unit, can also be used as a fixed unit and equipped with the corresponding mechanical interlocking, with the use of XGN2 and so on. VTZ series of mechanism can also be used for the transformation of old switchgear of many international brands; this case is used for the replacement and transformation of NXAIR propulsion mechanism installed on Siemens 3AE circuit breaker in India.

B02

Product Specifications

Specification Sheet

No.	Name	Unit	Data
1	Rated Voltage	kV	12
2	Rated Frequency	Hz	50/60
3	Rated Current	A	630/1250/1600/2000/2500
4	Rated Power Frequency Withstand Voltage	kV	28(Across the Contact Gaps) / 28(To Ground)
5	Rated Lightning Impulse Withstand Voltage	kV	95
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	Cycles	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	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)
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

3AE Siemens Vacuum Circuit Breaker Retrofit has many advantages:

Circuit Breaker Performance

E2-C2-M2
Easy Maintenance

The modular mechanism design allows for the replacement of closing and opening coils without the need to dismantle other components. Users can easily replace the coils, and no testing or adjustment is required after replacement, making future operation and maintenance more convenient.
High Conductivity

The rationally designed conductive circuit meets the temperature rise level of 1.1 times the rated current.
Perfect Replacement

This retrofit solution perfectly replaces aging Siemens products, making maintenance and replacement easier, addressing the urgent needs of electricity customers.

Product Applications

3AE Siemens Vacuum Circuit Breaker Retrofit has many applications:

Power plants

Industrial fields

Power grid systems

Power infrastructures

Product Outline Drawing

3AE Siemens Circuit Breaker Retrofit Product Outline Drawing

Secondary Wiring Diagram

3AE Siemens Circuit Breaker Retrofit Secondary Wiring Diagram

As a specialized vacuum circuit breaker and relative accessories manufacturer in China, we have profuse designs of ABB and Siemens with series VCB, our price is very competitive because we are a manufacturer, we are the source.

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12KV/24KV/40.5KV vacuum circuit breakers

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