Dongfa Intelligent supplies factory-direct DC 48V Closing and Tripping Coil solutions for high voltage vacuum circuit breaker operating mechanisms. Designed for DC48V low voltage control systems, this coil features 4Ω resistance, approximately 12A operating current, short-time high current capability, lead wire connection, brass push rod with locking nut, external reset spring, and galvanized metal housing. It is suitable for circuit breaker mechanisms requiring strong electromagnetic force under limited voltage conditions.
The low resistance design enables higher current output under DC48V power supply conditions, providing sufficient electromagnetic force for closing and opening operations. Each coil undergoes resistance inspection and dielectric withstand testing before shipment to ensure stable electrical performance and reliable operation.
Operating at DC48V with 4Ω resistance, the coil can reach approximately 12A steady-state current and approximately 576W instantaneous power under short-time duty conditions. The high current structure compensates for the lower voltage characteristics of DC48V systems and provides reliable driving force for vacuum circuit breaker operating mechanisms.
The lead wire structure uses black multi-strand copper wires, allowing flexible connection methods according to cabinet wiring requirements. The design supports common soldering and crimping processes while maintaining reliable electrical connection performance.
The brass push rod provides mechanical strength, corrosion resistance, and stable movement performance. The locking adjustment nut allows fine adjustment of push rod extension and initial position, helping adapt to different circuit breaker operating mechanisms.
The external reset spring design allows operators to directly check spring condition during inspection. Replacement can be completed without removing the complete coil body, improving maintenance efficiency for long-term operation.
The top face includes five threaded mounting holes, providing multiple fixing options for different vacuum circuit breaker structures. Users can select suitable mounting positions according to actual mechanism requirements.
In low voltage control systems, electromagnetic force depends on sufficient current output. Compared with DC220V coil designs, DC48V applications require significantly lower resistance to increase current and achieve equivalent operating force.
For example, a DC220V 131.5Ω coil produces approximately 0.36A current, while a DC48V 4Ω coil can reach approximately 12A current. This difference demonstrates why low voltage applications require dedicated high current electromagnetic coil designs.
The short-time 12A current requirement places higher demands on the control circuit. The auxiliary contact must have sufficient DC current switching capability, while the power supply, terminals, and external wiring must be capable of handling short-time current impact. Improper control circuit matching may cause voltage drop, contact arcing, abnormal operation, or reduced switching performance. Users should confirm system compatibility before installation.
The coil winding process requires thicker wire, fewer turns, and accurate resistance control. Dongfa Intelligent verifies resistance consistency during production to maintain 4Ω ±5% accuracy at 20°C.
The DC 48V Closing and Tripping Coil adopts multi-strand copper lead wires designed for high current connection requirements. The wiring structure improves installation flexibility while maintaining stable electrical performance.
The brass push rod and locking nut structure allow adjustment according to different operating mechanism requirements. After adjustment, the locking nut helps maintain stable positioning during repeated closing and opening operations.
| Parameter | Specification |
| Product Name | DC 48V Closing and Tripping Coil |
| Operating Voltage | DC48V |
| Coil Resistance | 4Ω |
| Resistance Accuracy | ±5% at 20℃ |
| Steady-State Current | Approximately 12A |
| Instantaneous Power | Approximately 576W short-time duty |
| Connection Method | Lead wire connection |
| Lead Wires | 2 pcs black multi-strand copper wires |
| Push Rod Material | Brass with locking adjustment nut |
| Reset Method | External reset spring |
| Housing Material | Galvanized metal housing |
| Mounting Structure | 5 threaded mounting holes on top face |
| Duty Type | Short-time duty operation |
| Standard | GB China National Standard |
| Certification | ISO9001 Quality Management System |
| Application | High voltage vacuum circuit breaker closing and opening operating mechanisms |
| Packaging | Carton packaging |
Before replacing an existing coil, confirm the following technical information to ensure correct matching:
The DC 48V Closing and Tripping Coil is designed for short-time operation in DC48V circuit breaker control systems. Correct voltage selection, electrical connection, and mechanical installation are important to maintain reliable performance and prevent damage.
This coil is specifically designed for DC48V control systems. Do not connect it to DC110V, DC220V, or AC power sources. Incorrect voltage input may result in excessive current, overheating, or permanent coil failure.
During operation, the coil current can reach approximately 12A. Before installation, confirm that the control power supply capacity, auxiliary contact rating, and protection components can handle short-time high current operation.
Due to the high current characteristics, external wiring should have sufficient cross-sectional area. Undersized cables may cause voltage loss, cable heating, and insufficient electromagnetic force during closing or opening actions.
This product is a short-time duty coil. Continuous energization is not allowed. The auxiliary contact should disconnect power immediately after the circuit breaker action is completed.
For replacement applications, confirm the original coil model, operating voltage, resistance value, push rod stroke, mounting dimensions, and operating mechanism type. Proper matching helps avoid installation problems and ensures stable switching performance.
Dongfa Intelligent provides professional after-sales support for DC 48V Closing and Tripping Coil, covering technical consultation, installation guidance, troubleshooting, and long-term maintenance support. With 14 years of experience in high voltage electrical manufacturing, our technical team helps customers achieve reliable product application after delivery.
Before and after purchase, Dongfa Intelligent provides technical consultation based on operating voltage, application environment, circuit breaker mechanism, and installation requirements. For replacement projects, our engineers help confirm product compatibility according to original coil information and technical parameters.
Technical guidance is available for installation, wiring connection, and commissioning. Customers can provide drawings, photos, or operation conditions, and our team can provide corresponding suggestions through technical documents, images, and remote communication.
Dongfa Intelligent has established an efficient service response process. When customers encounter installation or operation issues, the technical team provides feedback within 24 hours and assists in analyzing possible causes related to electrical connection, control circuits, or mechanical adjustment.
For long-term equipment operation, Dongfa Intelligent supports spare parts consultation and maintenance guidance. Components such as reset springs and mechanical adjustment parts can be evaluated according to actual application requirements to help maintain stable equipment performance.
Different circuit breaker operating mechanisms may require different dimensions and technical specifications. Dongfa Intelligent supports OEM/ODM customization according to customer drawings, voltage requirements, mounting dimensions, and application conditions.
The DC 48V Closing and Tripping Coil operates at DC48V with approximately 12A current and approximately 576W instantaneous power under short-time duty conditions. The actual performance depends on the control circuit and operating mechanism design.
No. Different control voltages require different coil resistance designs. This coil is specifically designed for DC48V systems. Connecting it to DC110V, DC220V, or other voltage sources may cause excessive current and damage the coil.
Lower voltage systems require higher current to generate sufficient electromagnetic force. The low resistance design increases current output to achieve the operating force required by vacuum circuit breaker mechanisms.
Before installation, confirm operating voltage, coil resistance, push rod stroke, mounting dimensions, control power capacity, auxiliary contact capability, and external wiring conditions to ensure proper matching.
The lead wire connection structure simplifies cabinet wiring and provides installation flexibility. Multi-strand copper wires support common connection methods while maintaining reliable electrical performance for high current operation.
The external reset spring allows easier visual inspection and replacement. Maintenance personnel can check spring condition without completely disassembling the coil body.
Yes. Dongfa Intelligent supports OEM/ODM customization according to customer drawings, operating voltage, resistance requirements, mounting dimensions, push rod specifications, and application conditions.
Standard products support MOQ of 1 unit. Standard production usually requires 7-15 working days, while customized products generally require 15-30 working days depending on technical requirements.
Please provide the original coil model, operating voltage, resistance value, push rod stroke, mounting dimensions, operating mechanism information, and required quantity. Dongfa Intelligent will provide technical confirmation and product selection support.
If you need DC 48V Closing and Tripping Coil for vacuum circuit breaker operating mechanisms, please contact Dongfa Intelligent with your application details.
Our technical team will assist with product selection, compatibility confirmation, and customized production solutions according to your requirements.
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