36KV Vacuum Interrupter Circuit Breaker

Model: TD555P, TD545K, TD545A

The 36KV Vacuum Interrupter Circuit Breaker is the core high-end product of Sunway Hanguang, a professional manufacturer rooted in China. This 36KV Vacuum Interrupter Circuit Breaker adopts advanced high-vacuum arc-extinguishing technology, with no SF₆ emissions, complying with international standards. It has been widely used in over 50 countries, making Sunway Hanguang a reliable global supplier in the vacuum interrupter industry.

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Product Description

Founded in 1968 in Xiaogan High-tech Zone, Hubei, China, Sunway Hanguang has focused on high-voltage electrical equipment for over 50 years. With a 40,000-square-meter production base, 16-person R&D team and advanced imported equipment, the factory ensures stable mass production of the 36KV Vacuum Interrupter Circuit Breaker, with an annual capacity of 350,000 units.

Product Overview

As Sunway Hanguang’s core product, the 36KV Vacuum Interrupter Circuit Breaker is designed for 50/60Hz systems, with a rated voltage of 36KV (max 40.5KV) and vacuum degree ≥1.33×10⁻³Pa. It meets GB, IEC and ANSI standards, has been stably operating in 50+ countries, with cumulative deliveries over 60,000 units and annual export growth over 10%.

Product Parameters

ELECTRICAL RATINGS(3PHASE) SYMMETRICAL BASIS
Model NO.	VITD 36/2500-25P	VITD 36/2000-26.3K	VITD 36/2000-25A
Rated frequency	50/60Hz	50/60Hz	50/60Hz
Rated Voltage	36/40.5kV,r.m.s	40.5kV,r.m.s	40.5kV,r.m.s
Rated short-time power-frequency withstand voltage (1 min)	70/95kV,r.m.s	95kV,r.m.s	95kV,r.m.s
Rated lightning impulse withstand voltage	170/185kV,Peak	185kV,Peak	185kV,Peak
Rated Current	2500A	2000A	2000A
Circuit resistance at lowest rated contact force	≤20Micro ohms	≤20Micro ohms	≤20Micro ohms
Rated short-circuit breaking Current	25kA,r.m.s	25kA,r.m.s	25kA,r.m.s
Rated short-time withstand current	25kA,r.m.s	25kA,r.m.s	25kA,r.m.s
Rated duration of short-circuit	4s	4s	4s
Rated peak withstand current	63kA,r.m.s	63kA,r.m.s	63kA,r.m.s
Rated short-circuit making Current	63kA,r.m.s	63kA,r.m.s	63kA,r.m.s
Max. Dc component	0.4	0.4	0.4
Rated breaking current of single capacitor bank	630A,r.m.s	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	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	O-0.3(0.5)s-CO-180s-CO
MECHANICAL DATA
Interrupter Weight(Approx.)	5.32kg	8.23kg	8.23kg
Weight of movable parts	2.1kg	3.74kg	3.74kg
Closing force due to bellow and atmosphere	170±40N	170±40N	170±40N
Force required to hold contacts open at full stroke	320±50N	320±50N	320±50N
MECHANICAL REQUIREMENTS(REF. VCB)
Clearance between open contacts	15±1mm	18±2mm	18±2mm
Average opening speed(average of first 75% of contact gap)	1.5±0.3m/Sec	1.6±0.3m/Sec	1.6±0.3m/Sec
Average closing speed(average of last 30% of contact gap)	1.1±0.2m/Sec	1.3±0.2m/Sec	1.3±0.2m/Sec
Rated added external contact final force	2500±200N	2500±200N	2500±200N
Contact bouncing duration at closing operation	≤2ms	≤2ms	≤2ms
Closing and Opening non-simultaneity of three-phase Contacts	≤2ms	≤2ms	≤2ms
Maximum Rebound during opening	≤2mm	≤2mm	≤2mm
LIFE (ESTIMATED)
Electrical Life at Rated Normal Current	20,000 Operations	20,000 Operations	20,000 Operations
Electrical Life at Rated Short Circuit Current	50 Operations	50 Operations	50 Operations
Mechanical Life	30,000 Operations	30,000 Operations	30,000 Operations
Contact Erosion Limit	3mm	3mm	3mm
Shelf Life	20Years	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, Safe and Durable

The interrupter of the 36KV Vacuum Interrupter Circuit Breaker adopts Cu-Cr alloy contacts, with chopping current <3A and strong anti-welding performance. Equipped with imported bellows and epoxy APG insulation system, it has a 30-year design life, tolerates -45℃~+85℃ and ≤4000m altitude, with average trouble-free operation over 18 years.

2. Leading Technology, Controllable Quality

Relying on advanced manufacturing technology, core components are strictly inspected. Each 36KV Vacuum Interrupter Circuit Breaker undergoes 12 full-item tests before delivery, with QR code traceability and failure rate ≤0.05%.

3. Green and Intelligent, Wide Adaptability

Without SF₆ emissions, it complies with environmental standards, supports intelligent monitoring and is compatible with mainstream switchgears. Tool-free plug-and-play design improves installation efficiency by 40%.

4. Strong Strength, Comprehensive Services

Sunway Hanguang has over 30 core patents, provides OEM/ODM customization for the product, with 15-25 days delivery for conventional models. Global 24/7 after-sales support and 10-year warranty are available.

Product Applications

The product is widely used in: Power System (36KV substations), Industrial Production (metallurgy, petroleum), New Energy (offshore wind power), High-end Infrastructure and Overseas "Belt and Road" projects.