40.5KV Vacuum Interrupter Circuit Breaker

Model: TD544H, TD544

The 40.5kV Vacuum Interrupter Circuit Breaker is the core high-end product of Sunway Hanguang, a leading manufacturer with over 50 years of experience in high-voltage electrical equipment. This 40.5kV Vacuum Interrupter Circuit Breaker adopts advanced high-vacuum arc-extinguishing technology, featuring excellent performance, green intelligence and comprehensive services.

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Product Description

As Sunway Hanguang’s core product, the 40.5kV Vacuum Interrupter Circuit Breaker is designed for 50/60Hz AC systems (rated/max working voltage: 40.5kV). Its vacuum degree is better than 1.33×10⁻³Pa, ensuring rapid arc extinction without restrike or explosion, and it is environmentally friendly, in line with green power demands.

Complying with GB, IEC, ANSI and DIN standards, it covers models like VITD40.5/2000-40. With over 60,000 units delivered globally and 10% annual export growth, this 40.5kV Vacuum Interrupter Circuit Breaker is widely recognized by domestic and foreign customers. Free of SF₆ emissions, it complies with multiple international standards, operates stably in more than 50 countries, and becomes a trusted choice for global power enterprises, supporting power system safety and the "dual carbon" goal.

Product Parameter Table

ELECTRICAL RATINGS(3PHASE) SYMMETRICAL BASIS
Model NO.	VITD 36/2000-20H	VITD40.5/2000-40
Rated frequency	50/60Hz	50/60Hz
Rated Voltage	40.5kV,r.m.s	40.5kV,r.m.s
Rated short-time power-frequency withstand voltage (1 min)	95kV,r.m.s	95kV,r.m.s
Rated lightning impulse withstand voltage	185kV,Peak	185kV,Peak
5.Rated Current	2000A	2000A
Circuit resistance at lowest rated contact force	≤20Micro ohms	≤20Micro ohms
Rated short-circuit breaking Current	20kA,r.m.s	31.5kA,r.m.s
Rated short-time withstand current	20kA,r.m.s	31.5kA,r.m.s
Rated duration of short-circuit	4s	4s
Rated peak withstand current	50kA,r.m.s	80kA,r.m.s
Rated short-circuit making Current	50kA,r.m.s	80kA,r.m.s
Max. Dc component	0.4	0.4
Rated breaking current of single capacitor bank	630A,r.m.s	630A,r.m.s
Rated breaking current of back-to-back capacitor bank	400A,r.m.s	400A,r.m.s
Rated operating sequence	O-0.3(0.5)s-CO-180s-CO	O-0.3(0.5)s-CO-180s-CO
MECHANICAL DATA
Interrupter Weight(Approx.)	12.35kg	12.35kg
Weight of movable parts	4.1kg	4.1kg
Closing force due to bellow and atmosphere	170±40N	170±40N
Force required to hold contacts open at full stroke	320±50N	320±50N
MECHANICAL REQUIREMENTS(REF. VCB)
Clearance between open contacts	20±2mm	20±2mm
Average opening speed(average of first 75% of contact gap)	1.6±0.3m/Sec	1.6±0.3m/Sec
Average closing speed(average of last 30% of contact gap)	1.3±0.2m/Sec	1.3±0.2m/Sec
Rated added external contact final force	3100±200N	3100±200N
Contact bouncing duration at closing operation	≤2ms	≤2ms
Closing and Opening non-simultaneity of three-phase Contacts	≤2ms	≤2ms
Maximum Rebound during opening	≤2mm	≤2mm
LIFE (ESTIMATED)
Electrical Life at Rated Normal Current	20,000Operations	20,000Operations
Electrical Life at Rated Short Circuit Current	50Operations	50Operations
Mechanical Life	30,000Operations	30,000Operations
Contact Erosion Limit	3mm	3mm
Shelf Life	20Years	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

Product Features and Advantages

1. Excellent Performance, Safety and Durability

Adopting Cu-Cr alloy contacts (chopping current <3A) and imported 316L bellows (fatigue life >30,000 times), it has a 30-year design life. The insulation system adapts to Class IV pollution, -45℃~+85℃ temperature and ≤4000m altitude, with a failure rate <0.05%.

2. Leading Technology and Controllable Quality

Relying on advanced sealing and leak detection technologies, combined with strict core component inspection and fully automatic assembly, it ensures high consistency. Each unit passes 12 factory tests with QR code traceability for quality control.

3. Green Intelligence and Wide Adaptability

SF₆-free and compliant with IEC 62271-404, it replaces traditional circuit breakers. It supports intelligent monitoring modules, connects to IEC 61850 platforms, and is compatible with mainstream switchgear, improving installation efficiency by 40%.

4. Strong Strength and Comprehensive Services

With over 30 core patents, it provides OEM/ODM services (delivery in 15-25 days for conventional models). Passing multiple international certifications, it offers a 10-year warranty and 7×24-hour global technical support via 20 regional centers.

Product Applications

It is widely used in: power systems (UHV supporting projects, international major projects); industrial production (metallurgy, petroleum, etc.); new energy & transportation (offshore wind power, rail transit); high-end infrastructure; and "Belt and Road" overseas EPC projects.

Frequently Asked Questions

1. Customization

Supports multi-dimensional customization (rated current, operating mechanism, etc.), OEM/ODM services, and adapts to various international standards.

2. Quality Stability

Strict core component inspection, automatic production, 12 factory tests and QR code traceability ensure stable quality.

3. Warranty and After-sales Service

10-year limited warranty; 7×24-hour global technical support (installation guidance, fault diagnosis, spare parts supply).

4. Transportation and Installation

Custom moisture-proof packaging is used for transportation; on-site/remote installation guidance is provided, with post-installation performance verification required.

40.5KV Vacuum Interrupter Circuit Breaker