Working inside a substation is not easy. Every engineer knows the risks that come with high-voltage equipment. One of the most dangerous events in any substation is an arc flash. It happens fast, with no warning. The heat, light, and pressure it releases can injure workers and destroy equipment instantly.
That is why arc flash protection is so important. And that is exactly where the Reyrolle 7XG35 ReyARC Relay comes in.The relay detects arc flash events and responds faster than any human ever could. It is a life-saving device that every modern substation should have.
In this blog, we explore how the Siemens Reyrolle 7XG35 ReyARC Relay works. We also look at its key features, applications, pricing considerations, and how to find the right supplier.
Why Should You Care About an Arc Flash?
Before diving into the relay itself, let us understand the problem it solves. An arc flash occurs when electrical energy releases abruptly. It occurs when current travels through the air between two conductors. An arc flash has a temperature of up to 20,000 degrees Celsius. That is four times hotter than the surface of the sun.
The effects are devastating:
- Severe burns to workers who are nearby during the event.
- Permanent damage to switchgear, busbars, and cables.
- Fire outbreaks that spread quickly through the substation.
- Long and costly downtime that disrupts power supply to many.
- Huge financial losses from equipment replacement and repairs.
The only way to reduce these risks is to detect the arc flash and clear it as fast as possible. That is the job of the Siemens 7XG35 ReyARC Relay.
Introducing the Siemens Reyrolle 7XG35 ReyARC Relay
The Siemens Reyrolle ReyARC Relay is a dedicated arc flash detection relay. It is part of the trusted Reyrolle protection product family from Siemens. This relay is designed for use in medium-voltage switchgear, ring main units, and secondary distribution substations.
It uses optical sensors to detect the intense light produced during an arc flash. The moment it senses the arc, it sends a trip signal to the circuit breaker. The entire process happens in milliseconds. This speed drastically reduces the arc flash energy released into the substation.
The 7XG35 ReyARC Relay is not just fast. It is also smart. It combines light detection with overcurrent supervision. This dual-input method ensures that the relay trips only during a genuine arc flash. It avoids false trips caused by external light sources or other disturbances.
How Does the 7XG35 ReyARC Relay Work?
Understanding how this relay works helps you appreciate its value. The process is straightforward and highly effective in real-world conditions.
- Optical fiber sensors are placed inside the switchgear panels and busbars.
- These sensors constantly monitor for sudden bursts of intense light.
- When an arc flash occurs, the sensors detect the bright light immediately.
- The relay also checks for a corresponding rise in current at the same time.
- If both conditions are met, the relay confirms a genuine arc flash event.
- A trip signal is sent to the circuit breakers in under a few milliseconds.
- The fault is cleared before it can cause significant damage to equipment.
This two-step confirmation process is what makes the 7XG35 ReyARC Relay so reliable. It reacts with lightning speed and eliminates doubt at the same time.
Key Features That Make the 7XG35 Stand Out
The Reyrolle 7XG35 ReyARC Relay is packed with practical features. These features make it a top choice for engineers designing substation protection schemes globally.
- Ultra-Fast Trip Time: The relay clears arc flash faults in less than a few milliseconds.
- Optical Fiber Sensor Support: Works with point and loop fiber sensors for flexible installation.
- Overcurrent Supervision: Combines light detection with current measurement to avoid false trips.
- Multiple Sensor Inputs: Supports several sensors per relay unit for wide zone coverage.
- Compact Design: Fits into standard relay panels without requiring extra space on site.
Applications Across Different Industries
The Siemens Reyrolle ReyARC Relay is used across a wide range of industries. Anywhere there is medium-voltage switchgear, there is a need for arc flash protection.
- Power Utilities: Protects distribution substations that serve residential and commercial customers.
- Industrial Manufacturing: Safeguards motor control centers and internal switchgear in large plants.
- Oil and Gas: Used in onshore and offshore platforms where arc flash risks are especially high.
- Mining: Protects underground switchgear in harsh and confined environments.
- Railways: Protects traction substations and power supply systems along electrified routes.
- Data Centers: Ensures uninterrupted power by protecting critical MV switchgear from arc faults.
How to Choose the Right Supplier
Finding a trustworthy source is just as important as selecting the right product. A reliable Reyrolle 7XG35 ReyARC Relay Supplier will provide genuine products, proper documentation, and strong after-sales support for your team.
Here is what to look for when choosing a Reyrolle 7XG35 ReyARC Relay Supplier:
- Confirm they are an authorized Siemens distributor or certified reseller in your region.
- Ask for full product documentation, including datasheets, manuals, and test certificates.
- Check if they offer pre-sales technical support to help with system design and selection.
- Verify their delivery timelines to ensure they align with your project schedule closely.
- Look for suppliers with experience in protection relay projects and positive client references.
- Ensure they can provide after-sales support, including spare parts and technical assistance.
Installation and Maintenance Best Practices
Getting the most out of the Siemens 7XG35 ReyARC Relay requires proper installation and care. Here are some practical tips that every engineer should follow on-site.
- Position optical sensors carefully to cover all high-risk zones inside the switchgear panel.
- Follow the manufacturer’s wiring diagrams and sensor placement guidelines without shortcuts.
- Perform a full functional test after installation to confirm that all sensors and outputs work.
- Document all settings and test results for future reference and maintenance records.
- Inspect sensors and connections during scheduled maintenance visits every six months.
Conclusion
Electrical safety in substations starts with the right protection equipment. Arc flash is one of the most serious hazards in any high-voltage environment. The Reyrolle 7XG35 ReyARC Relay addresses this hazard head-on with speed, intelligence, and proven reliability.
The Siemens Reyrolle 7XG35 ReyARC Relay is built for one purpose: to detect and clear arc flash events before they cause harm. It does that job with exceptional speed and accuracy. Whether you are designing a new substation or upgrading an existing one, this relay deserves serious consideration. Take time to evaluate the Reyrolle 7XG35 ReyARC Relay Price from a qualified source. Work with a trusted Reyrolle 7XG35 ReyARC Relay Supplier who can guide you through the selection, supply, and commissioning process. Make electrical safety the foundation of your substation design.
Reliserv Solution is an authorized distributor and supplier of Siemens Protection Relays, delivering advanced and reliable solutions for modern substations. Based in Mumbai, Maharashtra, we support utilities, industries, and panel builders with expert guidance and customized offerings tailored to critical power system needs. If you’re looking to improve electrical safety with the Siemens Reyrolle 7XG35 ReyARC Relay, our team is ready to assist. Call us at +917506112097 or email [email protected] for product details, technical support, or project consultation. Click here to explore the Reyrolle 7XG35 ReyARC Relay and see how it enhances arc fault protection and overall substation safety.
