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Three Phase Relay Solutions
-- Steady & Reliable Manufacturer --
Three Phase Relay Solutions
Simultaneous three-phase switching for industrial motors and distribution panels
Introduction
Three phase relay solutions address the unique switching requirements of three-phase power systems commonly found in industrial environments, commercial buildings, and power distribution networks. These relays are designed to handle the higher voltages and currents associated with three-phase circuits while providing reliable control for motors, transformers, and other three-phase loads. Huajin Technology offers a comprehensive range of three-phase relays including magnetic latching versions that maintain state without continuous coil power, reducing energy consumption and heat generation in control panels.
Specifications
| Parameter | Specification |
|---|---|
| Contact Current Rating | 10A – 100A per phase |
| Coil Voltage Options | 12V, 24V, 48V, 110V, 220V DC |
| Number of Contacts | 3A, 3B, 3C, or 4A configurations |
| Initial Contact Resistance | ≤ 50 mΩ per contact |
| Electrical Life (Resistive Load) | ≥ 8,000 operations |
| Mechanical Life | ≥ 50,000 operations |
| Dielectric Strength (Coil to Contact) | ≥ 4000 VAC / 1 minute |
| Surge Withstand Voltage | ≥ 6000 V |
| Operating Temperature | -40°C to +85°C |
| Safety Approvals | CCC, State Grid, TUV |
Applications
- Three-phase motor starters and controllers
- Industrial pumping systems
- HVAC compressors and fans
- Power factor correction equipment
- Distribution panel switching
Advantages
- Simultaneous switching ensures balanced operation
- Magnetic latching reduces power consumption by over 90%
- Arc suppression minimizes contact wear
- Customizable configurations for various circuits
- Robust construction withstands vibration and temperature extremes
Frequently Asked Questions
What configurations are available for three-phase relays?
We offer 3A (three normally open), 3B (three normally closed), and 3C (three changeover) contact configurations. For applications requiring an auxiliary contact, 4A and 4C configurations are also available. These options allow integration into various control circuits, from simple motor starters to complex interlocking systems.
Can three-phase relays handle inductive loads like motors?
Yes. Our three-phase relays are designed specifically for inductive load switching. The contact material and arc chamber design support the inrush currents and inductive kickback characteristics of motor starting. For heavier inductive loads, contact gap and opening speed are optimized to extinguish arcs reliably during break operations.
How does magnetic latching work in three-phase relays?
A pulse of current energizes the coil to set or reset the relay, after which a permanent magnet holds the armature in position without requiring continuous coil current. This mechanism maintains contact status during power failures and eliminates the heat generated by continuously energized coils. A single pulse of approximately 50ms to 100ms duration completes the switching operation.
What are the mounting options for three-phase relay solutions?
DIN rail mounting is the standard configuration for industrial control panels. PCB mounting versions with pin layouts compatible with standard relay sockets are also available for equipment manufacturers. The relay housing is designed with clear terminal labeling and wiring diagrams printed on the top cover for simplified installation and maintenance.
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Established in May 2021
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Annual exports account for about 30%
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The company occupies an area of 8,000 square meters.
Huajin Technology Jiaxing Co., Ltd. was established in May 2021 and is located at 707 Yanyu Road, Yucheng Town, Haiyan County, Jiaxing City, Zhejiang Province. It is a high-tech enterprise specializing in the research and development, production, and sales of relays.The registered capital of the company is 10 million yuan, covering an area of 8000 square meters, with more than 120 employees. The annual production capacity of magnetic latching relays is over 10 million, of which exports account for about 30%. The company has obtained ISO9001-2015 quality management system certification, and its relays have passed CCC certification, State Grid certification, TUV certification, etc. It also holds multiple technical patents. Our main products include motor relays, single-phase, two-phase, and three-phase magnetic latching relays, which have a wide variety of types and can meet various customized solutions for customers.
