11KV Vacuum Interrupter Circuit Breaker

Model: TD324P, TD324N, TD324M, TD324G, TD324C, TD324A, TD321M, TD314Y, TD326G, TD326E, TD325Y, TD325U, TD325P, TD325N, TD325M, TD325L, TD325K, TD325J, TD325G, TD325E, TD325C, TD325A, TD324R, TD324Y, TD336R, TD336G, TD326Y, TD336Y, TD345K, TD358K, TD358Y, TD368Y

The 11KV Vacuum Interrupter Circuit Breaker is the core product of Sunway Hanguang Electric Manufacturing Limited, a professional manufacturer in Xiaogan High-tech Development Zone, Hubei Province, China. With over 50 years of experience in high-voltage electrical equipment, Sunway Hanguang has solid R&D and production strength.

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Product Description

The 11KV Vacuum Interrupter Circuit Breaker adopts advanced high-vacuum arc-extinguishing technology, featuring excellent performance, stable quality and wide adaptability, complying with international standards. It is widely used in global power transmission and distribution systems, becoming a trusted supplier in the industry.

Founded in 1968, Sunway Hanguang focuses on high-voltage electrical equipment, with a 40,000㎡ production base, 15,000㎡ construction area and total assets of over 80 million yuan. Our factory is equipped with advanced equipment, and a professional R&D team of 16 experts provides technical support. As a professional manufacturer based in China, we are committed to supplying high-quality 11KV Vacuum Interrupter Circuit Breaker and other products to global customers.

Product Overview & Core Parameters

The 11KV Vacuum Interrupter Circuit Breaker, Sunway Hanguang’s core product, is designed for medium-voltage power distribution, with reliable arc-extinguishing performance and wide applicability.

- Rated Voltage: 11kV (Maximum Operating Voltage: 12kV), applicable to 50/60Hz AC system

- Core Technology: High-vacuum arc-extinguishing (vacuum degree ≥1.33×10⁻³Pa), voltage coverage 0.66kV-40.5kV

- Standards: GB, IEC, ANSI; Annual Capacity: 350,000 units

- Market: Sold at home and abroad, export volume grows ≥10% annually

Product Specifications Table

ELECTRICAL RATINGS(3PHASE) SYMMETRICAL BASIS

Model NO.

VITD 12/1250-20P

VITD 12/1250-20N

VITD 12/1250-20M

VITD 12/1250-20G

VITD 12/1250-20C

VITD 12/1250-20A

VITD 12/800-13.1M

VITD 12/630-20Y

VITD 12/1250-31.5G

VITD 12/1250-31.5E

VITD 12/1250-25Y

VITD 12/1250-25U

VITD 12/1250-25P

VITD 12/1250-25N

VITD 12/1250-25M

Rated Frequency

50/60Hz

Rated Maximum Line to Line Voltage

12kV,r.m.s

Rated Power Frequency Withstand Voltage:Air

42kV,r.m.s

38kV,r.m.s

42kV,r.m.s

48kV,r.m.s

42kV,r.m.s

38kV,r.m.s

Rated Impulse Withstand Voltage:Air

95kV,Peak

Rated Normal Current

1250A

800A

630A

1250A

Rated Short - Circuit Current

(3Phase Symmetrical Basis)

20kA,r.m.s

13.1kA,r.m.s

20kA,r.m.s

31.5kA,r.m.s

25kA,r.m.s

26.3kA,r.m.s

25kA,r.m.s

Percentage D.C. Component of Rated S.C. Breaking Current

0.5

Rated Short-Circuit Making Current

50kA, Peak

50kA,Peak

50kA, Peak

32.75kA, Peak

50kA, Peak

80kA, Peak

63kA, Peak

65.75kA, Peak

63kA, Peak

Rated Duration of Short Time Current

Rated Short-Time Withstand Current

20kA,r.m.s

13.1kA,r.m.s

20kA,r.m.s

31.5kA,r.m.s

25kA,r.m.s

25A,r.m.s

26.3kA,r.m.s

25kA,r.m.s

Rated Peak Withstand Current

50kA,r.m.s

32.75kA,r.m.s

50kA,r.m.s

80kA,r.m.s

63kA,r.m.s

65.75kA,r.m.s

63kA,r.m.s

Maximum Contact Resistance at Minimum Closing Force

19 Micro ohms

25 Micro ohms

20 Micro ohms

18 Micro ohms

19 Micro ohms

18 Micro ohms

19 Micro ohms

20 Micro ohms

25 Micro ohms

Rated Breaking Current of Single Capacitor Bank

630A,r.m.s

400A,r.m.s

630A,r.m.s

400A,r.m.s

630A,r.m.s

400A,r.m.s

Rated Breaking Current of Back-to-Back Capacitor Bank

400A,r.m.s

Rated operating sequence

o-0.3s-co-180s-co

MECHANICAL DATA

Model NO.

VITD 12/1250-20P

VITD 12/1250-20N

VITD 12/1250-20M

VITD 12/1250-20G

VITD 12/1250-20C

VITD 12/1250-20A

VITD 12/800-13.1M

VITD 12/630-20Y

VITD 12/1250-31.5G

VITD 12/1250-31.5E

VITD 12/1250-25Y

VITD 12/1250-25U

VITD 12/1250-25P

VITD 12/1250-25N

VITD 12/1250-25M

Interrupter Weight (Approx.)

2.39kg

2.36kg

2.28kg

2.36kg

3.14kg

2.32kg

1.65kg

1.73kg

3.54kg

3.44kg

3.03kg

2.65kg

2.39kg

2.36kg

2.28kg

Moving Part Weight (Approx.)

0.82kg

0.8kg

0.49kg

1.28kg

1.1kg

0.93kg

1.2kg

0.82kg

1.2kg

Closing Force due to Bellow and Atmospheric

80±40N

120±50N

80±40N

15.9kgF

80±40N

15.9kgF

Force Required to Hold Contacts open at Full Stroke

120±50N

190±60N

120±50N

MECHANICAL REQUIREMENTS (REF. VCB)

Model NO.

VITD 12/1250-20P

VITD 12/1250-20N

VITD 12/1250-20M

VITD 12/1250-20G

VITD 12/1250-20C

VITD 12/1250-20A

VITD 12/800-13.1M

VITD 12/630-20Y

VITD 12/1250-31.5G

VITD 12/1250-31.5E

VITD 12/1250-25Y

VITD 12/1250-25U

VITD 12/1250-25P

VITD 12/1250-25N

VITD 12/1250-25M

Contact Stroke

8±1 mm

9±1 mm

11±1 mm

9±1 mm

8±1 mm

Opening Speed (average of 75 contact gap)

1.1±0.2m/Sec

1.0-1.4m/Sec

1.1±0.2m/Sec

1.0-1.4m/Sec

1.1±0.2m/Sec

1.0-1.4m/Sec

Maximum Overtravel During Opening

2mm

Maximun Rebound During Opening

2mm

Closing Speed (average of last 30% contact gap)

0.6±0.2m/Sec

0.6-1.0m/Sec

0.6±0.2m/Sec

0.6-1.0m/Sec

0.6±0.2m/Sec

0.6-1.0m/Sec

Maximum Contact Bounse Duration (with maximum 2 bounces)

≤2ms

0.002Sec

≤2ms

0.002Sec

≤2ms

0.002Sec

Rated Contact Compressive Force

2000±200N

120-140kgF

2000±200N

3150±200N

2000±200N

184-203kgF

2000±200N

184-224kgF

Closing and Opening non-simultaneity of three-phase Contacts

≤2ms

LIFE (ESTIMATED)

Model NO.

VITD 12/1250-20P

VITD 12/1250-20N

VITD 12/1250-20M

VITD 12/1250-20G

VITD 12/1250-20C

VITD 12/1250-20A

VITD 12/800-13.1M

VITD 12/630-20Y

VITD 12/1250-31.5G

VITD 12/1250-31.5E

VITD 12/1250-25Y

VITD 12/1250-25U

VITD 12/1250-25P

VITD 12/1250-25N

VITD 12/1250-25M

Electrical Life at Rated Normal Current

50,000 Operations

Electrical Life at Rated Short Circuit Current

100 Operations

Mechanical Life

50,000 Operations

Contact Erosion Limit

3mm

Shelf Life

20Years

Meets or exceeds the electrical endurance requirements of class E2 for autoreclosing duty per IEC 62271-200 and JB 8738-2008.

Rated Characteristics to be given on request

For more parameter information, please contact us via email：export@swhge.com

Product Features & Advantages

1. Safe & Reliable

Adopting Cu-Cr alloy contacts and imported bellows, the 11KV Vacuum Interrupter Circuit Breaker has low chopping value, annual leakage rate <0.5% and 30-year service life. It adapts to -45°C~+85°C, ≤4000m altitude, with mechanical life ≥50,000 times.

2. Leading Technology & Quality Control

With one-time sealing and rapid leak detection technology, our factory ensures product consistency. Each 11KV Vacuum Interrupter Circuit Breaker has a unique serial number and test report, supporting full traceability, complying with international certifications.

3. Green & Intelligent

No SF6 emission, eco-friendly. It supports intelligent monitoring and is compatible with mainstream switchgear, plug-and-play, improving installation efficiency by 30%.

4. Strong Strength & Perfect Service

With 20+ core patents, we provide OEM/ODM services, 10-year warranty, 7×24-hour remote support and on-site service, becoming a trusted supplier globally.

Product Applications

Widely used in power systems, industrial production, commercial infrastructure, new energy and overseas EPC projects for power transmission and distribution protection.