VR32 Series Switch-Disconnectors Manufacturer Supplier

VR32 Series Switch-Disconnectors

The VR32 series switch-disconnectors are designed for making, carrying, and breaking electrical circuits in AC systems with voltages up to 660 V at a frequency of 50 Hz, as well as DC circuits with voltages up to 440 V.

These products are utilized in low-voltage switchgear for operational control, safe equipment shutdown, and providing a visible break in the electrical circuit during technical maintenance and repair work.

Description

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Scope of Application

The heavy-duty VR32 series switch-disconnectors are professionally designed, manufactured, and optimized for efficiently making, carrying, and breaking rated currents within modern low-voltage AC electrical networks operating with voltages up to 660 V at a standard frequency of 50 Hz, as well as highly demanding DC power circuits with operating voltages up to 440 V. Engineered to withstand rigorous electrical stresses, these switches offer excellent wear resistance and thermal stability under long-term continuous duties.

These versatile products are widely utilized as standard units in low-voltage switchgear assemblies, control panels, and distribution boards for reliable daily operational control, secure equipment shutdown, and providing an unmistakable, highly intuitive visible physical break in the electrical circuit. This explicit safety gap gives operators complete optical confirmation of isolation during routine technical maintenance, field testing, and critical repair work, drastically mitigating risks of accidental arc-flash incidents.

Due to their robust construction and versatile mounting architecture, the durable VR32 series switches can be seamlessly utilized as primary incoming main switches, sectional tie breakers, and downstream power distribution devices. They offer an exceptionally dependable and cost-effective circuit management solution within the power supply systems of heavy industrial manufacturing plants, large commercial complexes, and public infrastructure facilities worldwide.

Application Scenarios

Fields of Application

The VR32 series switch-disconnectors are widely used in various industrial sectors and the power engineering industry:

Industrial Enterprises

They are utilized in distribution cabinets, control panels, production lines, and technological equipment for safe power supply management.

Power Facilities

They are used in transformer substations, distribution points, and power supply facilities for the switching and isolation of electrical circuits.

Commercial Buildings

They are suitable for shopping centers, office buildings, hotels, hospitals, and other commercial infrastructure facilities.

Transport and Communication Infrastructure

They are installed at railway facilities, communication stations, telecommunication hubs, and urban infrastructure sites.

Backup Power Supply Systems

They are used in generator circuits, distribution panels, and emergency power systems for safe load switching and isolation.

Normal working conditions

Operating Conditions (Normal Working Conditions)

The VR32 series switch-disconnectors must be operated under the following conditions:

Ambient Air Temperature: From –60 °C to +40 °C.

Installation Altitude: No more than 2000 m above sea level.

Atmospheric Conditions: The relative humidity of the air must not cause moisture condensation on the current-carrying components.

Environmental Safety: The surrounding environment must be free from explosive gases, conductive dust, and corrosive substances capable of causing metal corrosion or damaging the insulation.

Pollution Degree: Not higher than the level specified by the requirements of IEC 60947-3.

Enclosure Requirements: Installation is permitted indoors or inside protected electrical control cabinets.

Weather Protection: The device must be protected from direct exposure to atmospheric precipitation, ice, and snow.

Installation Method: Mounting is permitted in a vertical position in accordance with the manufacturer's instructions.

Design Features
VR32 Series Switch-Disconnectors details

Type Designation Structure

Switch-disconnector: VR32-X₁X₂-X₃X₄X₅X₆X₇X₈-X₉ …A-L-X10

Switch-disconnector	- Product Group
BP32	- Series
X₁X ₂	- Thermal Current Code: 31 — 100 А; 35 — 250 А; 37 — 400 А; 39 — 630 А
X₃	- Handle execution: А— Fixed ; В— Detachable
X₄	- Number of poles and number of throw directions:
X₄	1— Single-pole, single-throw; 2—Double-pole, single-throw; 3— Triple-pole, single-throw; 4 — Four-pole, single-throw; 5 — Single-pole, double-throw; 6 — Double-pole, double-throw; 7 — Triple-pole, double-throw;8 — Four-pole, double-throw
X₅	- Arc extinction chambers: 0 — Absent; 1 — Present
X₆	-Orientation of the connection plane for external terminal clamps:
	1 — Parallel to the mounting plane; 2 — Perpendicular to the mounting plane; 3 —Combined: input parallel, output perpendicular to the mounting plane;
	4— Combined: input perpendicular, output parallel to the mounting plane
X₇	-Manual operating mechanism type:
X₇	0 — Without drive; 2 — Side handle; 3 — Front rotary handle; 4 — Front offset handle; 5 — Side offset handle
Х₈	- Auxiliary contacts: 0 — Absent; 1 — Present
Х₉ …А	- Rated current, A
L	- Drive design: Left-side
Х₁₀	- Climatic execution and placement category: UHL3 or T

Technical Specifications

Parameter name	Parameter value
Main circuits
Rated operational voltage (U_e), V:	ВР32-Ф; ВР32
Alternating current (AC)	380,660
Direct current (DC)	220,440
Rated insulation voltage (U_i), V	660
Conventional free-air thermal current (I_th), A	100;250;400;630
Conventional enclosed thermal current (I_the), A	80;200;315;500
Mechanical endurance, operating cycles (O-C)
- for currents 100 and 250 A	25000
- for currents 400 and 630 A	16000
Cross-section of connected conductors, mm²
- for 100 A current	10...50
- for 250 A current	70...150
- for 400 A current	120...3х120
- for 630 A current	150...4х120
Utilization categories	AC-20B - without arc chutes
	AC-21B, AC-22B - with arc chutes
Degree of protection	IP00
Auxiliary circuits
Number of auxiliary contacts (per device)
single-throw (ST)	One (1 NC, 1 NO)
double-throw (DT)	Two
Rated operational current (I_e), A	2,5
Rated operational voltage at 50 Hz frequency (U_e), V	220
Utilization category	АС-15;DC-13
Short-circuit characteristics	Conventional thermal current of the device, A
	100	250	400	630
Rated short-time withstand current (I_cw), kA	5	8	11	16
Rated conditional short-circuit current (I_cc), kA	8	14	22	32