Medium Voltage Vacuum Contactor Actuator Module

Product Specifications

Technical details and manufacturing context for Medium Voltage Vacuum Contactor Actuator Module

Definition

This modular electromechanical actuator assembly is designed to provide the precise mechanical force required to open and close the contacts within a medium voltage vacuum contactor. It serves as the critical interface between the control system and the main power switching element in electrical distribution panels and motor control centers. This component ensures reliable, fast, and safe operation of the contactor, directly impacting the performance and longevity of the overall switchgear assembly. Its modular design allows for maintenance and replacement without disassembling the entire contactor unit.

The actuator converts an electrical control signal (typically from a relay or PLC) into linear mechanical motion via a solenoid or motor-driven mechanism. This motion is transferred through a linkage system to actuate the moving contact assembly within the vacuum interrupter bottle, establishing or breaking the electrical circuit.

Typical parameters for this component include a control voltage of 24 V DC (±10%), an operating force of 150–250 N, a stroke length of 12–20 mm, and an operating time of 50–100 ms. The mechanical endurance is rated at 100,000 operations, and the insulation resistance is at least 1000 MΩ per IEC 60243-1. The rated voltage is 12 kV, and the rated current is 400–630 A, both per IEC 62271-1. The operating temperature range is -25 to 55 °C, and the degree of protection is IP54–IP65 per IEC 60529. The module weighs 8–12 kg and has approximate dimensions of 300×200×150 mm (L×W×H).

Materials used include aluminum alloy for the housing, copper alloy for electrical contacts and terminals, spring steel for return springs, and engineering plastic for insulating components. These values and standards are provided as reference ranges and must be verified with the legal manufacturer or supplier for the specific model and application.

Working Principle

The actuator converts an electrical control signal (typically from a relay or PLC) into linear mechanical motion via a solenoid or motor-driven mechanism. This motion is transferred through a linkage system to actuate the moving contact assembly within the vacuum interrupter bottle, establishing or breaking the electrical circuit. The return springs ensure the contacts return to their default position when the control signal is removed. The operating time is typically 50–100 ms, and the mechanical endurance is rated at 100,000 operations.

Common Materials

Aluminum Alloy (Housing), Copper Alloy (Electrical Contacts & Terminals), Spring Steel (Return Springs), Engineering Plastic (Insulating Components)

Technical Parameters

Parameter	Typical range	Notes & selection driver
Control VoltageRequired	24 ±10% V DC	Nominal voltage required to energize the actuator solenoid/motor
Operating ForceRequired	150–250 N	Maximum mechanical force output at the drive linkage
Stroke LengthRequired	12–20 mm	Total linear travel distance of the actuator output shaft
Operating TimeRequired	50–100 ms	Time from control signal to full contact closure or opening
Mechanical EnduranceRequired	100000 operations	Minimum number of guaranteed mechanical operations before maintenance
Insulation Resistance	≥1000 MΩ	Minimum resistance between live parts and grounded housingIEC 60243-1
Rated Voltage	12 kV	Medium voltage classIEC 62271-1
Rated Current	400–630 A	For vacuum contactorIEC 62271-1
Operating Temperature	-25–55 °C	Ambient temperature rangeIEC 62271-1
Degree of Protection	IP54–IP65	For indoor installationIEC 60529
Weight	8–12 kg	Module only
Dimensions (L×W×H)	300×200×150 mm	Approximate envelope

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Solenoid Coil Assembly
Converts electrical energy into magnetic force to initiate movement

Material: Copper wire, epoxy encapsulation, steel core
Drive Linkage & Shaft Part
Transfers and directs the mechanical force to the contactor's moving contact

Material: Hardened steel alloy
Return Spring Mechanism Part
Provides stored energy to return the actuator to its default (usually open) position upon de-energization

Material: Spring steel
Position Indicator Optional
Provides visual or auxiliary contact feedback on the open/closed status of the actuator

Material: Engineering plastic, micro-switch

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Medium Voltage Vacuum Contactor Actuator Module.

Manufacturers of Medium Voltage Vacuum Contactor Actuator Module

Manufacturer profiles associated with Medium Voltage Vacuum Contactor Actuator Module.

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Frequently Asked Questions

What is the typical control voltage for this actuator module?

The typical control voltage is 24 V DC with a tolerance of ±10%. Always verify the exact requirement for your specific model and application with the manufacturer.

What is the mechanical endurance of this actuator?

The mechanical endurance is rated at a minimum of 100,000 operations before maintenance is required. This is a reference value and should be confirmed for the specific model.

What standards are referenced for this component?

The standards referenced include IEC 60243-1 for insulation resistance, IEC 62271-1 for rated voltage and current, and IEC 60529 for degree of protection. These are verification references, not proof of certification.

Can this actuator be replaced without disassembling the entire contactor?

Yes, the modular design allows for maintenance and replacement of the actuator without disassembling the entire contactor unit. However, always follow the manufacturer's instructions and safety procedures.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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pressure:	Atmospheric to 1.5 bar absolute (enclosure pressure)
other spec:	Rated voltage: 24-250V DC/110-240V AC, Mechanical endurance: 1,000,000 operations, Electrical endurance: 100,000 operations at rated current
temperature:	-20°C to +40°C (operating), -40°C to +70°C (storage)