Installation and Use Instructions for ABB VSC 7.2/12kV-400A Vacuum Contactor

Product basic information

Product: VSC Vacuum Contactor

Rated specifications: 7.2kV/12kV, 400A

Document Number: 1YHA000100 REV K (2023-11)

Applicable standards: IEC 62271-106, GB/T 14808

Structural form: fixed, withdrawable

Applicable scenarios: AC power distribution, frequent operation of loads (motors, transformers, capacitors)

Core Structure and Technical Highlights

MAC bistable permanent magnet actuator

Independent opening/closing coil, capacitor energy storage drive

Maintain power consumption<5W, action power 15W

Stable operation, not affected by voltage fluctuations

core component

Vacuum arc extinguishing chamber, permanent magnet mechanism, wide voltage power module, auxiliary switch

Withdrawable handcart, interlock, fuse holder

Key Technical Parameters

Parameter item 7.2kV series 12kV series

Rated voltage 7.2kV 12kV

Rated current 400A 400A

Power frequency withstand voltage 30kV 42kV

Lightning impulse withstand voltage 60kV 75kV

1-second short-time withstand current 6000A 6000A

Rated peak withstand current 15kA 15kA

1200 operations per hour

Mechanical lifespan 1000000 times 1000000 times

Opening time 35-60ms 35-60ms

Closing time 60-90ms 60-90ms

Working temperature -15 ℃~+40 ℃ -15 ℃~+40 ℃

Safety regulations

High voltage hazard: Power must be cut off, grounded, and tested before operation

Personnel requirements: Certified electrical professionals are required to operate

X-ray safety: The radiation during the withstand voltage of the arc extinguishing chamber is much lower than the national standard limit

Environmental Protection: Compliant with ISO 14001, low energy consumption, low waste

Installation requirements

environmental conditions

Altitude ≤ 1000m, over altitude requires capacity reduction

Indoor installation, dry and ventilated, anti condensation

Mechanical Installation

Fixed: Installation hole 332 × 195mm

Drawable: Hand cart travel 200mm

electrical connection

Main circuit: Silver plated contact surface, tightened according to bolt specifications (M6-10Nm, M8-25Nm)

Auxiliary circuit: Cable ≥ 1.5mm ², withstand voltage 3kV

control mode

SCO single command: power on closing, power off opening

DCO dual command: pulse on/off, supports undervoltage delay

Run and debug

Pre operation inspection: insulation, grounding, contacts, fasteners

Action requirement: * * 85% -110% * * Reliable action at rated voltage

Emergency disconnection: hexagonal operation, torque 5Nm, rotation 30 °

Protection configuration: Short circuit protection must be achieved by connecting fuses in series

Maintenance and upkeep

Inspection cycle: 1 year or 50000 operations (whichever comes first)

Maintenance free component: Vacuum arc extinguishing chamber

Key inspection items

The insulation components are clean and undamaged

Finger cleaning and lubrication

Overtravel inspection: ≥ 0.5mm (replace if below)

Maintenance after short circuit: Check the arc extinguishing chamber, conductor, and shell, and replace them if necessary

Spare parts

Core spare parts: wide voltage power module, auxiliary switch, interlocking shaft, plum blossom touch finger, handcart locking electromagnet

Ordering requires providing: model, voltage, current, serial number

Key questions and answers

Question: What are the core advantages of the permanent magnet mechanism in VSC vacuum contactors and why is it suitable for frequent operation?

Answer: Adopting MAC bistable permanent magnet mechanism, capacitor energy storage ensures consistent operation and maintains power consumption<5W; mechanical life up to 1 million times, can operate 1200 times per hour, vacuum arc extinguishing chamber maintenance free, very suitable for frequent switching scenarios such as motors and capacitors.

Question: What are the mandatory safety and configuration requirements for the installation and operation of this contactor?

Answer: It must be operated by certified electrical personnel, and the power must be cut off, tested, and grounded before operation; Indoor installation, ambient temperature * * -15~+40 ℃ * *, altitude ≤ 1000m; must be combined with fuses to achieve short-circuit protection, and cannot be used alone.

Question: What is the maintenance cycle and core judgment criteria for VSC contactors, and how to deal with overtravel failure?

Answer: Under normal working conditions, check every year or every 50000 operations; The vacuum arc extinguishing chamber is maintenance free and only requires inspection of its appearance; When the contact overtravel is less than 0.5mm in the closed state, the arc extinguishing chamber and related components must be replaced, and the arc extinguishing chamber nut cannot be adjusted by oneself.