MV Outdoor Vacuum Circuit-breaker for substation

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Key attributes

Brand	ROCKWILL
Model NO.	MV Outdoor Vacuum Circuit-breaker for substation
Rated voltage	40.5kV
Rated normal current	3150A
Rated short circuit breaking current	40kA
Series	OVCB

Product descriptions from the supplier

Description

Product overview

By combining the latest developments in circuit breaker technology with world-renowned quality,Type OVCB Vacuum Substation Circuit Breakers are the advanced medium-voltage circuit breakers available.

Compliance to IEC/IEEE/ANSI standards

Designed and tested to comply with IEC/IEEE/ANSI standards.

ISO 9001 certification

Designed and manufactured in a facility certified by ISO 9001.

High seismic construction

High seismic construction according to ETGI-1.020/IEEE-693.

Mian feature

High-speed operation - Interrupting time of three cycles or less.
Long life - Embedded pole interrupter protect contacts from corroding elements and contamination.
Ease of maintenance - Interrupter assemblies and contact wear indicators accessible via a bolted panel.
Reliability - A minimum of moving parts on the proven motor-driven, spring-charged modular operating mechanism.
Durability - vacuum circuit breakers adopt special convection ventilation technology, with ultra-low resistance vacuum interrupter, greatly reducing temperature rise caused by long-term operation of vacuum circuit breaker and reducing power loss.

Standard configuration

Porcelain dry-type bushings with extended creepage.
Multi-ratio bushing-type CTs for measurement & protection.
Window for viewing status indicators and operation counter.
Standard configuration for 1-closing coil and 2-opening coils.
12-pole auxiliary switch (6 'a' & 6 'b' contacts), latch check switch.
Modular operating mechanism with integral manual charging handle.
Available for extended CT, PT, Meter, Relay mounting in IP55 metal enclosure.

Product structure

Technical Parameters

Project	Unit	Data
Rated voltage	kV	7.2/12	16.5/24	33/36/40.5
Rated current	A	630,1250, 1600,2000, 2500,3150	630/1250, 1600,2000, 2500/3150	1250,1600, 2000,2500
Rated frequency	Hz	50/60	50/60	50/60
Rated insulation level
Rated lightning impulse withstand voltage(1min(effective value))	kV	42	65	95
Rated power frequency withstand voltage - BIL(peak value)	kV	75	125	185
Rated short circuit breaking current	kA	20/25/31.5/40	20/25/31.5/40	25/31.5/40
Rated short time withstand current(4s)	kA	20/25/31.5/40	20/25/31.5/40	25/31.5/40
Rated peak withstand current(peak values)	kA	50/63/80/100	50/63/80/100	63/80/100
Operating mechanism type		Motor drive spring mechanism
Rated operating sequence		Ics ≤ 40kA: O-0.3s-CO-180s-CO Isc = 40kA: O-180s-CO
Rated short-circuit current breaking times/electrical endurance	level	E2(EC2271-100)
Mechanical endurance	No of times	10000
Rated auxiliary control voltage	V	AC220/110, DC220/110
Opening time	ms	20~50	20~50	20~60
Arcing time	ms	10~15	10~15	≤15
Full opening time	ms	30~65	30~65	30~65
Closing time	ms	35~70	35~70	35~70
Enclosure protection level		IP55

Application scenarios

12kV-40.5kV outdoor medium voltage distribution system;
Circuit control and protection of outdoor substations and distribution stations;
Severe outdoor environments such as frequent earthquakes, high altitudes, and high pollution;
Industrial and municipal distribution network projects that require high reliability.

Dimension

FAQ

Q: What are the types of operating mechanisms and control voltages available, and is manual emergency operation supported?

The operating mechanism is a motor-driven spring mechanism, supporting dual-mode operation of electric and manual. The standard auxiliary control voltage is AC220/110V and DC220/110V, which is compatible with most distribution system control circuits. Manual operation is achieved through an integrated energy storage handle, which is suitable for emergency scenarios such as power outages, and can be opened and closed without the need for additional tools.

Q: What is the difference between vacuum circuit breaker and SF6 circuit breaker？

Their core difference is arc-extinguishing media: Vacuum breakers use high vacuum (10⁻⁴~10⁻⁶Pa) for insulation and arc extinction; SF₆ breakers rely on SF₆ gas, which adsorbs electrons well to quench arcs.
In voltage adaptation: Vacuum breakers fit medium-low voltages (10kV, 35kV; some up to 110kV), rarely 220kV+. SF₆ breakers suit high-ultra high voltages (110kV~1000kV), mainstream for ultra-high voltage grids.
For performance: Vacuum breakers extinguish arcs fast (<10ms), have 63kA~125kA breaking capacity, suit frequent use (e.g., power distribution) with long life (>10,000 cycles). SF₆ breakers excel in stable large/inductive current breaking but work less frequently, needing insulation recovery time post-extinction.
Compared to SF6 gas circuit breakers, vacuum circuit breakers can achieve zero greenhouse gas emissions and are more environmentally friendly because the arc extinguishing device does not contain any gas

Negotiable

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Whole life care manager

Whole-life care management services for equipment procurement, use, maintenance, and after-sales, ensuring safe operation of electrical equipment, continuous control, and worry-free electricity consumption.

The equipment supplier has passed platform qualification certification and technical evaluation, ensuring compliance, professionalism, and reliability from the source.

MV Outdoor Vacuum Circuit-breaker for substation

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