Industrial Grade Over and Under Voltage Protection Relay Adjustable Settings for Equipment Safety

Quick Detail:

1. voltage protection relay,over and under voltage protector

2. Detect the voltage level in the circuit and automatically take protective measures when abnormal voltage occurs

Description:

The Advanced Triple-Function Protection Relay: Unifying Voltage Stability, Earth Leakage Safety, and Energy Intelligence

In the intricate ecosystem of modern electrical installations—spanning industrial plants, commercial facilities, and sensitive residential applications—the demand for comprehensive protection and intelligent management has never been greater. Systems are threatened not only by destabilizing voltage fluctuations but also by the insidious danger of earth leakage currents, which pose severe fire and electrocution risks. Traditionally, safeguarding against these diverse hazards required multiple discrete devices: a voltage protection relay, a separate earth leakage circuit breaker (RCBO/GFCI), and an energy meter. The Advanced Triple-Function Protection Relay shatters this conventional, compartmentalized approach, introducing a revolutionary, all-in-one solution. This device seamlessly integrates precision over/under-voltage protection, configurable earth leakage protection, and accurate energy monitoring into a single, intelligent unit. It represents a paradigm shift in electrical safety and management, offering unparalleled simplicity, space efficiency, and a holistic view of circuit health.

A Revolutionary Integration: Three Critical Protections in One Device

The defining innovation of this protector is its unified design, which consolidates three essential safety and monitoring functions:

1. Intelligent Voltage Protection: At its core, it operates as a highly precise Voltage Protection Relay (VPR). It continuously monitors the supply with 1% voltage measurement accuracy, ensuring decisions are based on reliable data. Users can define the safe operating window with a wide overvoltage setting range (110V-300V) and undervoltage setting range (85V-220V), making it adaptable to any regional grid standard and specific equipment sensitivity. To prevent nuisance tripping, both trip delay (1-30s, default 1s) and reset startup delay (1-500s, default 5s) are fully adjustable.

2. Configurable Earth Leakage Protection: This groundbreaking addition transforms the device from a simple voltage guardian into a life-safety sentinel. It provides adjustable earth leakage protection from 10mA to 300mA. Crucially, this function can be turned off if not required, offering ultimate flexibility. A 10mA-30mA setting is ideal for protecting human life in residential or damp locations, while higher settings (100mA-300mA) are perfect for preventing fire hazards in industrial circuits with inherent background leakage.

3. Integrated Energy Monitoring: Beyond protection, it delivers valuable operational intelligence with a high-resolution power display scope of 0-99999.9 kWh. This allows users to track the cumulative energy consumption of the protected circuit directly from the device, facilitating basic energy audits, cost allocation, and identification of abnormal consumption patterns.

Precision Engineering for Unwavering Reliability and Global Application

Engineered for professional deployment, the device meets rigorous operational standards. Its rated insulation voltage of 400V and capability to function at altitudes up to 2000 meters ensure safety and performance in diverse installations. It is built to endure challenging environments with an exceptional operating temperature range of -30°C to 70°C, guaranteeing reliability in unheated outdoor enclosures or hot industrial control panels. The 1NO (Normally Open) output contact provides a reliable switching mechanism for controlling the load circuit via a contactor or directly for suitable loads, with a design focused on long-term durability.

Unmatched User Control and Adaptive Safety

This device empowers the user with an exceptional degree of customization, moving beyond fixed, one-size-fits-all protection. The fully adjustable thresholds for both voltage and earth leakage mean a single device model can be deployed in countless scenarios. For example, it can be set with a tight voltage band (e.g., 200V-240V) and 10mA leakage sensitivity for a laboratory, or a wider voltage band (e.g., 180V-260V) with 300mA leakage protection for a workshop floor. The error margin for its protective functions is within 2%, ensuring that the setpoints are acted upon with high fidelity. The dual-adjustable delays are critical for system stability, allowing it to ignore brief, harmless fluctuations while responding decisively to sustained faults.

Transformative Applications Across Sectors

The integration of these three functions makes this device indispensable in numerous contexts:

• Industrial & Manufacturing: Protects sensitive machinery (PLCs, drives, robots) from voltage damage while guarding entire production lines against fire-causing insulation faults and monitoring line energy use.
• Renewable Energy Systems: Ideal for off-grid or weak-grid applications. It protects inverters and batteries from dangerous voltage excursions, provides essential leakage protection for the system, and helps verify energy output/consumption.
• Commercial Buildings & Data Centers: Protects HVAC systems, server racks, and lighting circuits. The leakage protection enhances fire safety, while voltage protection ensures equipment longevity. Energy data aids in submetering.
• Agricultural & Residential Use: Safeguards irrigation pumps, farm equipment, and home appliances. The life-saving earth leakage function (set at 30mA) combined with voltage stabilization provides comprehensive safety for people and property.

Conclusion: The Future of Integrated Circuit Protection and Management

The Advanced Triple-Function Protection Relay is more than an incremental improvement; it is a fundamental rethinking of electrical protection architecture. By unifying voltage stability, earth leakage safety, and energy metering, it delivers unmatched value: reducing panel space, simplifying wiring, lowering overall system cost, and providing a centralized point for monitoring and control. For system integrators, it streamlines design and installation. For facility managers and homeowners, it offers a robust, customizable, and intelligent guardian for their most critical electrical circuits. In an age demanding efficiency, safety, and intelligence, this device stands as the definitive solution, transforming a standard distribution board into a smart, safe, and resilient nerve center for electrical power. It is not merely a protector; it is an essential cornerstone for building modern, reliable, and insightful electrical infrastructure.

Competitive Advantage:

Advantages of Wenzhou DAQUAN Electric Co., Ltd

1. Innovation Leadership

With 258 patents and 27 years of industry experience, we lead in R&D of industrial control devices like relays and timers, ensuring cutting-edge product performance.

2. Global Certifications

Our products hold CE, ROHS, IEC, TUV certifications plus ISO9001, meeting strict international standards for seamless global market access.

3. Scale Supply Stability

Backed by a 7,800m2 factory, 499-strong team, and 70M RMB annual output, we guarantee efficient production and timely delivery for bulk orders.