AC 220V 56 Ohm Closing and Tripping Coil

As a China manufacturer, Dongfa Intelligent supports technical confirmation, OEM requirements and replacement projects.AC 220V 56 Ohm Closing and Tripping Coils have different electrical characteristics from DC coils. Under AC power conditions, the coil impedance includes both DC resistance and inductive reactance. Therefore, the actual operating current cannot be calculated only by voltage divided by resistance value.

The AC220V 56Ω Closing Opening Coil is designed with a silicon steel laminated core structure. Compared with a solid metal core, laminated silicon steel reduces eddy current circulation generated by alternating magnetic fields, helping control heat generation and improving electromagnetic efficiency under AC operation.

This coil is mainly used for high voltage vacuum circuit breaker operating mechanisms with AC220V control power. Before replacement, the operating voltage, coil resistance, mounting dimensions, push rod stroke and original coil model should be confirmed to ensure compatibility with the existing mechanism.

AC Electrical Characteristics and Core Structure

For AC coils, the 56Ω value represents the coil DC resistance measured under specified conditions. The actual operating condition is affected by coil inductance, frequency and magnetic circuit characteristics.

• Operating voltage: AC220V
• Coil DC resistance: 56Ω ±5% at 20°C
• Core type: Silicon steel laminated AC-specific core
• Application: AC vacuum circuit breaker operating mechanisms

The laminated core structure uses insulated silicon steel sheets to reduce eddy current loss caused by alternating magnetic flux. This structure is an important difference between AC coils and DC coils.

Plug-in Terminal and Mechanical Structure

The coil uses a plug-in terminal connection design for connection with matching receptacles. This structure simplifies wiring during switchgear assembly and replacement maintenance.

The mechanical structure includes an external reset spring, brass push rod and locking adjustment nut. The push rod position can be adjusted according to the operating mechanism requirements, and the locking nut helps maintain the adjusted position during operation.

Core Advantages

AC-Specific Silicon Steel Laminated Core

The AC 220V 56 Ohm Closing and Tripping Coil uses silicon steel laminated core technology with insulation between laminations. The structure reduces eddy current paths under alternating magnetic fields and helps reduce core heating during AC operation.

Plug-in Terminal Connection Design

The plug-in terminal structure allows direct connection with compatible receptacles. It reduces additional wiring operations during installation and provides a convenient connection method for switchgear assembly and maintenance.

External Reset Spring Structure

The external reset spring is positioned outside the coil body, allowing easier visual inspection during maintenance. Spring replacement can be completed without removing the complete coil assembly.

Brass Push Rod with Locking Adjustment Nut

The push rod uses brass material with good machining accuracy and non-magnetic characteristics. The locking adjustment nut allows adjustment of push rod position according to different operating mechanism requirements.

Five-Point Mounting Hole Design

The top surface provides five threaded mounting holes for flexible installation. The fixing points can be selected according to the original operating mechanism structure and mounting requirements.

Technical Specifications

Full Technical Parameters

Selection Guide

When selecting or replacing an AC220V 56Ω Closing Opening Coil, confirm the following technical conditions before installation:

• Operating Voltage: Confirm the original mechanism uses AC220V control power. AC coils should not be directly replaced with DC220V coils.
• Resistance Value: Confirm the coil resistance specification. The 56Ω value represents DC resistance and does not equal the actual AC operating current.
• Core Type: AC coils require laminated magnetic cores to reduce eddy current loss under alternating magnetic fields.
• Terminal Type: Confirm that the cabinet wiring system uses matching plug-in receptacles.
• Push Rod Stroke: Check the original stroke requirement and adjustment position before replacement.
• Mounting Dimensions: Confirm mounting hole position and fixing method with the original operating mechanism.
• Duty Condition: The coil is designed for short-time operation and should not be continuously energized.

Replacement Information Required

For replacement projects, please provide the original coil information and operating mechanism details. Dongfa Intelligent technical team will review the parameters and confirm compatibility before production.

• Original closing or opening coil model
• Operating voltage
• Coil resistance value
• Push rod stroke
• Mounting dimensions
• Terminal connection type
• Required quantity
• Original equipment photos or drawings (if available)

Application Information

The AC 220V 56 Ohm Closing and Tripping Coil is applied in high voltage vacuum circuit breaker operating mechanisms using AC220V control power. Typical application areas include:

• Power distribution systems
• Substations
• Industrial electrical equipment
• High voltage switchgear assemblies
• Vacuum circuit breaker maintenance and replacement projects

Installation Notes

• Confirm the control voltage type before installation. AC220V coils and DC220V coils are not interchangeable.
• Use matching plug-in terminals and ensure reliable electrical connection.
• Check push rod position and mechanical stroke after installation.
• Fix mounting bolts according to the operating mechanism structure and prevent loosening caused by vibration.
• Verify closing and opening actions after installation testing.

Manufacturing Process and Quality Inspection

AC Coil Assembly and Electrical Testing

The manufacturing process of AC closing and opening coils includes coil winding, silicon steel laminated core assembly, mechanical component installation and electrical inspection. Each coil is inspected according to product requirements before shipment.

• Silicon steel laminated core assembly with insulation between laminations
• Coil winding and resistance verification
• Mechanical assembly inspection of push rod and reset spring
• DC resistance testing before shipment
• Dielectric withstand testing before shipment

Production and Inspection Capability

Dongfa Intelligent has production experience in high voltage electrical products and switchgear accessories. The production process covers component assembly, electrical testing and quality inspection for different product requirements.

For AC closing and opening coils, key quality control points include coil resistance consistency, insulation performance, mechanical dimensions and operating mechanism matching.

High and Low Voltage Electrical Product Supply

Dongfa Intelligent provides high voltage electrical components, low voltage electrical products and switchgear accessories. The product range supports different electrical equipment applications and customized requirements.

The company operates according to ISO9001, ISO14001 and ISO45001 management systems. Factory audits and product technical communication can be supported according to customer requirements.

FAQ

What is the current of an AC220V 56Ω coil?

For the AC220V 56Ω Closing Opening Coil, the current cannot be calculated only by dividing AC voltage by DC resistance. The actual operating current depends on the total impedance, including coil resistance and inductive reactance. The operating current should be confirmed according to the actual mechanism and electrical conditions.

Can AC220V Closing Opening Coil replace DC220V coil?

No. AC220V coils and DC220V coils have different electromagnetic characteristics and core structures. AC coils normally use silicon steel laminated cores to reduce eddy current loss, while DC coils have different design requirements. The replacement must match the original control power type.

Why does an AC coil need a silicon steel laminated core?

AC magnetic fields continuously change with frequency. A solid metal core can generate eddy currents and increase heat loss. Silicon steel laminations with insulation layers reduce eddy current circulation and improve AC operating performance.

What are the advantages of plug-in terminals?

Plug-in terminals provide a direct connection method with matching receptacles. This structure simplifies installation and replacement operations while reducing additional wiring work.

How should I confirm whether this coil matches my circuit breaker?

Please provide the original coil model, operating voltage, resistance value, push rod stroke, mounting dimensions and equipment information. These parameters help confirm whether the coil matches the existing vacuum circuit breaker operating mechanism.

Do you support OEM and customized production?

Dongfa Intelligent supports OEM and customized production according to voltage, mechanical dimensions, terminal type and operating mechanism requirements. Technical drawings or original samples can be provided for confirmation before production.