ABB VACUUM CONTACTOR VSC7 SCO IEC 60470 400A 3POLE 220-250V 50/60Hz

ABB VACUUM CONTACTOR VSC7 SCO IEC 60470 400A 3POLE 220-250V 50/60Hz

Product Overview

ABB vacuum contactor VSC7 (SCO mode) is a high-performance electrical switchgear designed specifically for medium voltage AC distribution systems. Its core parameters include 400A rated current, 3-pole (3POLE) structure, suitable for 220-250V, 50/60Hz auxiliary power supply, and fully complies with IEC 60470 international standard and GB/T 14808 national standard. This product integrates a bistable permanent magnet actuator and vacuum disconnect technology, with core advantages such as low power consumption, high lifespan, and maintenance free. It can operate stably in harsh industrial environments and is widely used for control and protection of equipment such as motors, transformers, and capacitor banks. It is an ideal choice for frequent operation scenarios in power plants, industrial manufacturing, shipping, and other fields.

As the core model of ABB VSC series, VSC7 (SCO) supports single command operation mode (SCO), which means closing when the auxiliary power supply is supplied, and closing when receiving opening commands or when the auxiliary power supply voltage is insufficient, equivalent to electrical self holding function. It is suitable for fixed or withdrawable installation of UniGear switchgear and power box, and can be flexibly integrated into various medium voltage distribution systems.

Core functions

1. Efficient vacuum disconnection, safe and reliable

Adopting vacuum arc extinguishing chamber technology, the vacuum degree inside the arc extinguishing chamber is as high as 1.3 × 10 ⁻⁴ Pa. The metal vapor generated by the separation of the main contact during disconnection can be quickly extinguished at the first zero crossing of the current, and the dielectric strength of the fracture surface can be quickly restored, effectively limiting overvoltage. Its current cutoff value is not higher than 0.5A, which provides more accurate protection for equipment in scenarios such as motor opening and closing, avoiding damage to the load caused by overvoltage.

2. Bi stable permanent magnet operation, energy-saving and environmentally friendly

Equipped with ABB's mature "MAC" type bistable permanent magnet actuator, compared to traditional electromagnetic actuators, the power consumption is significantly reduced, fully reflecting the energy-saving and environmentally friendly design concept. The institution operates stably, can achieve high-frequency operations, adapts to frequent start stop industrial scenarios, and has a maintenance free feature that greatly reduces operation and maintenance workload.

3. Wide voltage adaptation, flexible operation mode

Equipped with a wide voltage power supply module, it can accurately adapt to 220-250V AC/DC auxiliary power supply, compatible with 50/60Hz frequency, and can be flexibly adapted according to on-site power supply conditions. Supports SCO single command operation mode, with simple and clear operation logic, and can be used in conjunction with fuses in networks with short-circuit capacity up to 1000MVA, enhancing the system's short-circuit protection capability.

4. Comprehensive protection, adaptable to multiple loads

Has excellent thermal stability and short-circuit withstand capability, can effectively cope with 1/2 cycle overcurrent impact, and can adapt to various load types such as AC-3 and AC-4. It can provide precise control and protection functions for different load characteristics such as electric motors, transformers, and capacitor banks, especially suitable for special scenarios such as back-to-back capacitor bank switching.

Key technical parameters

Product Model

VSC7 (SCO mode)

execution standard

IEC 60470 (International Standard), GB/T 14808 (National Standard)

rated current

400A

polar number

3POLE (3 poles)

Auxiliary power supply parameters

220-250V AC/DC，50/60Hz

rated voltage

7.2kV

Power frequency withstand voltage (1min)

23kV

1-second short-time withstand current

6000A

Rated peak withstand current

15kA peak

Operating frequency

900 times/hour (SCO mode)

Lifetime parameters

Electrical lifespan (AC3 type) 500000 times; Mechanical lifespan of 1000000 cycles (in SCO mode)

Installation method

Fixed or withdrawable (compatible with UniGear switchgear and power box)

Environmental adaptation range

Environmental temperature: -15 ℃~+40 ℃; Relative humidity:<95%; Altitude<1000m (customizable for special environments)

Product advantages

-High lifespan, long cycle, low operation and maintenance costs: The electrical lifespan can reach up to 500000 times (AC3 type), and the mechanical lifespan can reach up to 1000000 times, with maintenance free features, significantly reducing equipment replacement and operation and maintenance costs.

-Excellent safety performance and precise overvoltage control: The vacuum breaking technology combined with low current characteristics (≤ 0.5A) effectively limits the breaking overvoltage, provides reliable protection for loads and distribution systems, and reduces the risk of equipment damage.

-Energy saving and environmentally friendly, strong adaptability: The bistable permanent magnet actuator has low power consumption, and the wide voltage power supply module can adapt to various power supply conditions of 220-250V AC/DC. Fixed and withdrawable installation options are available, and it can flexibly adapt to different distribution cabinet designs.

-High frequency operation is stable and widely adaptable to various scenarios: supporting 900 high-frequency operations per hour, it can meet the needs of frequent starting and stopping of electric motors, frequent switching of capacitor banks, and is compatible with multiple load types such as AC-3 and AC-4.

-Standard compliance, good system compatibility: fully compliant with international and domestic standards such as IEC 60470, can be combined with fuses to form FC circuits, seamlessly integrated into various medium voltage distribution systems, with strong short-circuit closing ability, suitable for networks with short-circuit capacity up to 1000MVA.

Application scenarios

This product is widely used in medium voltage distribution systems in multiple industries due to its excellent environmental adaptability and load adaptation capabilities. Typical scenarios include:

1. Power plant: motor control and protection for auxiliary equipment such as water pumps and fans;

2. Industrial manufacturing: Control of electric motors and transformers for production lines in industries such as metallurgy, chemical engineering, and cement, as well as switching of capacitor banks;

3. Infrastructure: Key load control for medium voltage distribution systems in urban rail transit and large buildings;

4. Shipping industry: Equipment control and protection of ship power systems, adapted to harsh marine environments;

5. In the field of new energy: load control and short-circuit protection of supporting distribution equipment for new energy power stations.