33KV Vacuum Interrupter For Load Break Switch

Model: TF512P

Sunway Hanguang, a professional manufacturer with over fifty years of experience in the electrical field, develops and manufactures the 33kV Vacuum Interrupter For Load Break Switch (model VITF 33/630-16P), the core arc extinguishing unit for medium-voltage load break switches. This product is compatible with 50/60Hz systems, has a vacuum degree of ≤1.33×10⁻³Pa, achieving arc-free switching and overcoming the shortcomings of traditional products. Relying on advanced equipment and full-process quality control, the product has passed numerous authoritative tests, with over 100,000 units installed worldwide, serving more than 60 countries and regions. As a reliable supplier, it provides high-quality medium-voltage power distribution solutions to customers in China and globally.

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Product Description

The 33kV Vacuum Interrupter For Load Break Switch is a core component specifically developed by Sunway Hanguang for medium-voltage load break switches, corresponding to model VITF 33/630-16P, compatible with globally used 50/60Hz AC systems, and is the core guarantee for reliable switching of load break switches.

Sunway Hanguang has built a standardized, fully automated factory, relying on advanced German and Japanese equipment to achieve full-process control. Holding more than 20 core patents, the product complies with authoritative standards such as IEC 62271-200, and has been recognized by State Grid, Siemens, and others. With over 100,000 units installed worldwide, it has accumulated mature application experience in extreme working conditions.

Product Parameters

ELECTRICAL RATINGS(3PHASE) SYMMETRICAL BASIS
Model NO.	VITF 33/630-16P
Rated frequency	50/60Hz
Rated Voltage	12kV,r.m.s
Rated short-time power-frequency withstand voltage (1 min)	42kV,r.m.s
Rated lightning impulse withstand voltage	75kV,Peak
Rated Current	630A
Maximum Contact Resistance at Minimum Closing Force	25Micro ohms
Rated short-time withstand current	16kA,r.m.s
Rated duration of short-circuit	3s
Rated peak withstand current	40kA,Peak
Rated short-circuit making Current	40kA,r.m.s
Rated active load breaking current	630A
Rated closed-loop breaking current	630A
Rated capacity of no-load transformer	10A
Rated cable-charging breaking current	630A
Rated breaking current of single capacitor bank	400A
Rated breaking current of back-to-back capacitor bank	3150A
MECHANICAL DATA
Interrupter Weight(Approx.)	1.65kg
Moving Part Weight(Approx.)	0.8kg
Closing Force Due to Bellow and Atmospheric	8.0kgF
Force Required to Hold Contacts Open at Full Stroke	11.8kgF
MECHANICAL REQUIREMENTS(REF. VCB)
Contact Stroke	8±1 mm
Opening Speed(average of 75 contact gap)	1.0-1.4m/Sec
Maximum Overtravel During Opening	2mm
Maximun Rebound During Opening	2mm
Closing Speed(average of last 30% contact gap)	0.6-1.0m/Sec
Maximum Contact Bounse Duration(with maximum 2 bounces)	0.002Sec
Rated Contact Compressive Force	7.0-9.0kgF
LIFE (ESTIMATED)
Storage life	20years
Mechanical endurance	10000Operations
Contacts limit erosion	3mm
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

This product is deeply optimized for the high-frequency operation requirements of 33kV load break switches, with leading comprehensive performance in the industry: It uses high-purity Cu-Cr alloy contacts, with a current interruption value of <3A, suppressing operating overvoltage and providing strong stability for small current interruption; the imported 316L stainless steel bellows ensure reliable sealing, with an annual leakage rate of <0.5%, and a mechanical life of over 10,000 cycles; it has excellent insulation, suitable for wide temperature ranges, high altitudes, and complex working conditions; each product undergoes 12 rigorous tests, supports traceability, and offers convenient operation and maintenance, with 7×24-hour service provided by 25 global technical centers.

Product Applications

The 33kV Vacuum Interrupter for Load Break Switches has a wide range of applications, covering conventional scenarios such as urban main power grids, industrial parks, and data centers, as well as extreme operating conditions such as offshore wind power, rail transit, and high-altitude substations.

It precisely meets core requirements such as load switching and cable isolation, is free from gas pollution, aligns with the carbon neutrality trend, and provides core support for the upgrading of smart power distribution in China and globally, adapting to various demanding medium-voltage power distribution scenarios.

Frequently Asked Questions

1. Customization Services: Supports customization of rated current and intelligent modules, provides OEM/ODM services, and is compatible with various standards and different brands of load switches.

2. Quality Assurance: Selected core components, full-process quality control, traceable and verifiable test reports available.

3. Warranty and After-Sales Service: 10-year limited warranty, global service network provides fast on-site and spare parts services.

4. Installation Notes: Moisture-proof and shock-proof transportation, standardized installation and testing to ensure compatibility with the switch body.

33KV Vacuum Interrupter For Load Break Switch