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Protection Relay

ALION Protection Relays are crucial components ensuring the safety and reliability of the power grid. With advanced fault detection capabilities, they can quickly identify and respond to faulty equipment or hazardous situations, minimizing downtime. ALION’s GRV8-63 voltage protector is designed to provide overvoltage and undervoltage protection for household appliances. It adopts a dual-bus wiring design, and clear LED indicators provide instant feedback on the relay status for easy monitoring. ALION protective relays offer reliability, efficiency and flexibility, making them ideal for maintaining the safety and reliability of electrical infrastructure.


Protection relays safeguard critical equipment in industries such as power, manufacturing, and telecommunications, ensuring equipment stability and worker safety.

Industrial automation

Protection relays protect equipment and machinery from power fluctuations or faults, ensuring stable production line operation.

Renewable energy systems

Protection relays ensure the safety and reliability of power generation equipment such as inverters and transformers in solar and wind energy installations.

Data centers

Protection relays protect critical infrastructure in data centers, ensuring uninterrupted operation of servers and network equipment.


Protection relays protect sensitive electronic equipment in from power surges and power outages, maintaining continuous connectivity.

Household Appliance Protection

Safeguarding household appliances like air conditioners, and refrigerators from voltage fluctuations.

Power Distribution Systems

Protection relays protect critical equipment in power distribution systems, minimizing downtime due to overloads or short circuits.

Main Benefit

DIN rail mounting is a method for installing electrical components, such as circuit breakers and industrial control equipment, inside equipment racks, electrical cabinets, or on walls.

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Trusted By

We supply products to various reputable brands, including ABB, Chint, Perry, Hager, Finder, Hellermanntyton, and others.

Are You Looking for Protection Relay Manufacturer?

  • Choose us for ALION protection relays because we bring over 25 years of expertise in manufacturing and customizing these essential components. 
  • With 16 advanced production lines dedicated to protection relay manufacturing, we ensure prompt delivery and superior quality. 
  • From idea conception to final serial production, our comprehensive support ensures your satisfaction. 
  • Trusted by industry-leading brands like ABB, Chint, Perry, and Hager, we supply reliability and quality protection relays.
  • As an ISO-certified time switch factory, our productssadhere to stringent standards, including UL, VDE, TUV, CE, and ROHS certifications. 
  • Customize Alion’s reliable and high-quality protection relay – contact us now for a quote.

FAQ for Protection Relay

Protection relays are vital components of electrical systems. They continuously monitor key parameters such as impedance, voltage, and current, acting as sensors. When protection relays detect anomalies or faults in the power system, they respond swiftly by signaling the circuit breaker to operate. This enables the protection relay to effectively isolate the faulty section of the system, disconnecting the fault and maintaining continuity of power supply. Protection relays minimize downtime and ensure the smooth, uninterrupted operation of electrical systems.

The main difference between a Protective Relay and a Safety Relay lies in their    intended functions and applications within industrial systems:


Protective Relays: Function based on external variables such as voltage or current to detect and respond to faults or abnormalities in electrical systems, protecting equipment from damage.

Safety Relays: Specifically designed as safety devices to detect hazards and ensure the safety of personnel and equipment in industrial environments.


Protective Relays: Require external components like current transformers for integration into electrical systems.

Safety Relays: Can be directly integrated into the main controller for further processing or automation of safety processes.


Protective Relays: Typically installed in electrical panels alongside other electrical or electronic components.

Safety Relays: Installed with appropriate physical dimensions to cover the footprint of hazards and ensure safety.