Vacuum Interrupters

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Description

 

The vacuum interrupter, also known as the vacuum chamber, is responsible for opening and closing current-carrying contacts. Vacuum circuit breakers have a steel arch interrupter located in the center. They are symmetrically built and stacked in ceramic insulators.

 

METTZ is in industry not only finishing products, but also vacuum interrupters and offering environmentally friendly medium and high voltage interrupters that reliably switch high stress currents robustly without the need for unreliable cooling or ventilation systems.

Vacuum interrupters provide long life and low maintenance, save space, and reduce costs. Used for repetitive switching, motor inrush current interruption, fault protection, and overcurrent and short circuit protection.

Custom Vacuum Interrupters always ready for order.

 

Parameters

 

Parameter Item Unit Data
Rated voltage kV 1,14; 3; 7.2; 12; 24; 40,5
Rated current A 63-5000
Rated frequency Hz 50/60
Rated short-time power frequency withstand voltage(1 min) kV 42
Rated lightning impulse withstand voltage kV 75
Rated short-circuit breaking current kA 16/20/25/31.5/40
Rated peak withstand current kA 100
Rated short-circuit making current kA 100
Rated short-time withstand current kA 40
Rated short-circuit duration s 4
Rated single capacitor bank breaking current A 630
Rated back to back capacitor bank breaking current A 400
Breaking operation of rated short circuit breaking current times 30
Mechanical life times 10 000 – 1 000 000
Contact closing force due to bellows and atomsphere N 200±50
Force required to hold contact open at full stroke N 300±50
Circuit resistance at lowest rated contact force μΩ ≤15
Contact limit erosion mm 3
Internal gas pressure Pa ≤1.33×10-3
Weight of moving parts kg 2.7
Storage life year 20

 

Specifications required for matched switchgear

Parameter item Unit Data
Rated clearance between open contacts mm 11±1
Average opening speed m/s 1.1±0.2
Average closing speed m/s 0.6±0.2
Rated contact pressure N 4500±300
Contact bouncing duration at closing operation ms ≤2
Closing and opening non-simultaneity of contacts ms ≤2
Maximum rebound during opening mm ≤2

Solutions

 

MTD-40.5-2000-31.5 Vacuum interrupter 40.5 kV

Vacuum Interrupters

MTD-40.5-1600-25 Vacuum interrupter 40.5 kV

Vacuum Interrupters

MTD-40.5-1250-25 Vacuum interrupter 40.5 kV

Vacuum Interrupters

MTD-12-2000-40 Vacuum interrupter 12 kV

Vacuum Interrupters

MTD-12-1600-31.5 Vacuum interrupter 12 kV

Vacuum Interrupters

MTD-12-1250-31.5 Vacuum interrupter 12 kV

Vacuum Interrupters

MTD-12-1250-25 Vacuum interrupter 12 kV

Vacuum Interrupters

MTD-12-630-20 Vacuum interrupter 12 kV

Vacuum Interrupters

MTJC-7.2-800A Vacuum interrupter 7.2 kV

Vacuum Interrupters

MTJC-7.2-630A Vacuum interrupter 7.2 kV

Vacuum Interrupters

MTJC-7.2-250A

Vacuum Interrupters

MTJC-1.14-630A

Vacuum Interrupters

MTJC-1.14-400A

Vacuum Interrupters

MTJC-1.14-250A

Vacuum Interrupters

MTJC-1.14-125A

Vacuum Interrupters

MTJC-1.14-63A

Vacuum Interrupters

In electrical engineering, a vacuum interrupter is a switch which uses electrical contacts in a vacuum. It is the core component of medium-voltage circuit-breakers, generator circuit-breakers, and high-voltage circuit-breakers. Separation of the electrical contacts results in a metal vapour arc, which is quickly extinguished. Vacuum interrupters are widely used in utility power transmission systems, power generation unit, and power-distribution systems for railways, arc furnace applications, and industrial plants.

 

Since the arc is contained within the interrupter, switchgear using vacuum interrupters are very compact compared with switchgear using air, SF6 or oil as arc-suppression medium. Vacuum interrupters can be used for circuit-breakers and load switches. Circuit-breaker vacuum interrupters are used primarily in the power sector in substation and power-generation facilities, and load-switching vacuum interrupters are used for power-grid end users.
METTZ Group stands as a consortium of Chinese electrical firms, renowned for its expertise in manufacturing electrical equipment. We are specialized in crafting a comprehensive suite of transmission and distribution equipment, covering a wide voltage range from 0.4 to 40.5 kV. Our commitment lies in delivering reliable and stable products to our clientele, encompassing vacuum circuit breakers (VCB), gas-insulated switchgear modular units (RMU), solid insulated switchgear (SIS) panels, air insulated switchgear (AIS) panels, and dry compressed air insulated switchgear panels (DIS).

Since our inception, METTZ Group has been at the forefront of adopting international cutting-edge technologies and equipment. We pride ourselves on our extensive collaboration and dialogue with leading experts in the electrical technology sector, both within China and internationally. Our offerings are tailored to meet the specific needs of our clients, including Original Equipment Manufacturer (OEM) services, customization of products to unique parameters and dimensions, all in alignment with our customers’ specifications.

METTZ Group is dedicated to innovation, quality, and customer satisfaction, ensuring that we remain a preferred partner for electrical equipment solutions worldwide.

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