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Overvoltage Protection Relays
-- Steady & Reliable Manufacturer --
Overvoltage Protection Relays
Fast-response voltage monitoring for industrial and commercial power systems
Introduction
Overvoltage protection relays serve as critical safety components in power distribution systems, designed to disconnect circuits when voltage exceeds predefined thresholds. These devices prevent damage to sensitive electronic equipment caused by voltage spikes, lightning strikes, or grid fluctuations. Huajin Technology manufactures overvoltage protection relays with adjustable trip settings and fast response times, suitable for industrial, commercial, and residential electrical installations.
Specifications
| Parameter | Specification |
|---|---|
| Contact Current Rating | 5A – 80A |
| Coil Voltage Options | 12V, 24V, 48V, 110V, 220V DC |
| Overvoltage Trip Range | 110% – 140% of nominal voltage |
| Response Time | ≤ 30 ms |
| Contact Form | 1A, 1C, 2C |
| Initial Contact Resistance | ≤ 30 mΩ |
| Dielectric Strength (Coil to Contact) | ≥ 4000 VAC / 1 min |
| Operating Temperature | -25°C to +70°C |
| Reset Method | Automatic / Manual (selectable) |
| Safety Approvals | CCC, TUV, CE |
Applications
- Industrial motor protection systems
- Commercial building power distribution
- Residential electrical safety devices
- Power supply units for sensitive equipment
- Renewable energy system protection
Advantages
- Adjustable trip point for custom protection
- Magnetic latching eliminates standby power
- Transparent cover for visual contact inspection
- Manual reset option for critical safety
- Compact DIN rail mounting simplifies installation
Frequently Asked Questions
What is the typical response time of overvoltage protection relays?
The response time is typically 30 milliseconds or less from the moment the voltage exceeds the set threshold to contact switching. This rapid response minimizes the duration of overvoltage exposure to downstream equipment, reducing the risk of semiconductor damage and insulation breakdown in connected devices.
Can the overvoltage trip value be adjusted on site?
Yes. The trip value can be adjusted within the range of 110% to 140% of the nominal voltage using an adjustment dial located on the front face of the relay. This feature allows installers to configure the protection setting according to specific application requirements without removing the device from the panel.
Does the relay automatically reset after the voltage returns to normal?
Both automatic and manual reset versions are available. The automatic reset model restores the circuit once the voltage drops below the safe threshold. The manual reset model requires physical intervention to resume operation, providing an added layer of safety for critical equipment where unexpected reconnection could pose hazards.
What mounting options are available for these relays?
The relays are designed for DIN rail mounting to fit standard 35mm rails used in industrial control panels and distribution cabinets. PCB mounting versions are also available for equipment manufacturers who require board-level installation. Terminal block connections support both screw-type and push-in wiring methods.
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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.
