Modern power systems require intelligent protection, reliable automation, and resilient infrastructure to ensure uninterrupted power supply. Our Protection Devices portfolio combines advanced Numerical Relays, Control & Relay Panels, and Substation Automation Systems to deliver secure, efficient, and future-ready electrical networks.
1. Established Legacy
Backed by CTR’s engineering heritage dating back to 1964, our Protection Devices Division has been delivering specialized Protection & Control solutions since 2014. With decades of engineering expertise, we continue to provide dependable solutions for utilities, industries, renewable energy, and infrastructure projects.
2. Advanced Numerical Relay Portfolio
Our numerical relay portfolio is designed to deliver fast, selective, and reliable protection for modern power systems. Built on advanced digital technology, these relays ensure enhanced system reliability, comprehensive fault analysis, and seamless integration with Substation Automation Systems (SAS).
2.1 Line Differential Protection Relay
Designed for high-speed protection of transmission and distribution lines, this relay compares the current entering and leaving the protected line to detect internal faults. It provides instantaneous fault isolation, helping maintain grid stability and minimize equipment damage.
2.2 Distance Protection Relay
Distance Protection Relays determine the location of faults by continuously measuring the electrical impedance between the relay and the fault point. They provide dependable primary and backup protection for transmission lines across multiple protection zones.
2.3 Transformer Differential Protection Relay (2-Winding / 3-Winding)
This relay protects power transformers against internal winding faults by comparing currents on both sides of the transformer. Advanced algorithms distinguish fault conditions from magnetizing inrush and over-excitation, ensuring secure and dependable operation.
2.4 Restricted Earth Fault (REF) Protection Relay
REF Protection offers highly sensitive detection of earth faults within a defined protection zone, making it ideal for transformers, generators, and busbars. It ensures rapid fault detection while remaining stable during external fault conditions.
2.5 Backup Protection Relay (Directional / Non-Directional)
Backup Protection Relays provide an additional layer of protection when primary protection is unavailable or delayed. They safeguard feeders and network equipment against overloads, short circuits, and earth faults, ensuring reliable system coordination.
2.6 Bay Control Unit (BCU)
The Bay Control Unit integrates protection, monitoring, measurement, control, and interlocking functions into a single intelligent device. It enables efficient local and remote operation of substation equipment while supporting modern digital communication protocols.
2.7 Voltage & Frequency Protection Relay
These relays continuously monitor system voltage and frequency to detect abnormal operating conditions that may threaten grid stability. They support protective actions such as load shedding, generator protection, and system separation during disturbances.
3. Control & Relay (C&R) Panels
We design and manufacture customized Control & Relay Panels from 33kV to 400kV, engineered to meet IEC standards and utility specifications. Our panels integrate approved protection relays and customized protection philosophies for dependable and scalable substation protection.
4. Intelligent Grid Automation – Substation Automation Systems
Our SAS solutions provide centralized monitoring, control, event recording, alarm management, and seamless communication using IEC 61850 and other industry-standard protocols. These systems enhance operational efficiency while simplifying substation management.
5. Grid Modernization & Retrofit
We support modernization of existing substations by upgrading conventional protection systems to digital architectures without major changes to primary equipment. This approach improves reliability, extends asset life, and minimizes outage duration.
6. Power Quality Solutions
Our portfolio also includes Active Harmonic Filters (AHF), Static VAR Generators (SVG), and High Voltage SVG (H-SVG) systems that improve power factor, reduce harmonics, optimize energy efficiency, and enhance overall grid stability.
7. Engineering Services
From system studies and protection coordination to relay setting calculations, FAT, SAT, testing, commissioning, and training, our engineering team provides complete lifecycle support for protection and automation projects.
8. Commitment to Excellence
With a strong focus on innovation, quality, and customer satisfaction, we continue to deliver reliable protection and automation solutions that help utilities and industries build safer, smarter, and more resilient power networks.
FAQ
CTR Protection Devices Division
The following FAQs provide answers to commonly asked questions about our Protection & Control Solutions, including Numerical Relays, Control & Relay Panels, and Substation Automation Systems.
The division specializes in advanced protection and control solutions including Numerical Relays, Control & Relay Panels (33kV–400kV), and Substation Automation Systems (SAS).
Yes. We modernize existing substations by replacing legacy protection systems with digital technologies while minimizing shutdown time.
Yes. We integrate utility-approved and customer-approved relay makes and models as per project requirements.
Our panels are engineered and tested in accordance with applicable IEC standards.
CTR’s engineering heritage dates back to 1964, while the Protection Devices Division has been delivering protection and automation solutions since 2014.
Yes. We provide engineering, design, configuration, testing, commissioning, training, and after-sales support.
Our engineering and manufacturing facility is located in Nashik, Maharashtra.
It detects internal transformer faults by comparing currents entering and leaving the transformer windings.
REF protection provides highly sensitive earth fault protection within a restricted zone such as transformers and busbars.
It compares current at both ends of a transmission line to rapidly detect internal faults.
Distance Protection measures impedance to determine the fault location on a transmission line.
It operates whenever primary protection fails or is delayed, ensuring dependable fault clearance.
A BCU provides local and remote control, monitoring, measurement, and interlocking of substation equipment.
It detects abnormal system conditions and initiates corrective actions to maintain grid stability.
They provide faster operation, greater accuracy, event recording, self-diagnostics, and digital communication.
Yes. Every panel is designed according to customer specifications and protection philosophy.
Our solutions cover applications from 33kV up to 400kV.
It provides centralized monitoring, visualization, control, alarm management, and reporting.
Each panel undergoes stringent inspections and Factory Acceptance Testing before dispatch.
Yes. We execute both new substation and modernization projects.
IEC 61850, IEC 60870-5-104, Modbus, DNP3, IEC 103, and other industry-standard protocols are supported.
Yes. They support IEC 61850 communication for interoperability and digital substations.
Utilities, renewable energy, steel, cement, oil & gas, mining, manufacturing, and infrastructure sectors.
Yes. They integrate seamlessly with most SCADA platforms using standard protocols.
Yes. Every panel undergoes comprehensive FAT before dispatch.
Yes. Our engineers support SAT, commissioning, relay configuration, and testing.
Yes. We provide relay coordination studies and protection setting calculations.
Our solutions are suitable for AIS, GIS, industrial, utility, renewable energy, indoor, and outdoor substations.
Yes. Our solutions are designed for easy integration into existing substations.
Yes. They record disturbance records, fault records, SOE, and event logs.
Yes. Relay settings can be updated whenever system conditions change.
Yes. They are widely used in solar, wind, hydro, and BESS applications.
Yes. Operators can remotely monitor alarms, events, measurements, and equipment health.
Yes. They are designed with modularity for future upgrades and expansion.
GA drawings, SLDs, schematics, wiring diagrams, cable schedules, terminal plans, BOMs, and test reports.
Yes. Open communication standards ensure seamless interoperability.
They rapidly detect and isolate faults, reducing outage duration and equipment damage.
Yes. Training is provided for operation, maintenance, and troubleshooting.
Yes. We provide lifecycle support, troubleshooting, and engineering assistance.
Yes. Existing panels can be retrofitted with modern Numerical Relays.
They enhance system visibility, speed up fault clearance, and reduce restoration time.
Yes. Remote diagnostics simplify maintenance and improve system availability.
Yes. Additional bays and devices can be integrated as system requirements grow.
Our solutions incorporate secure architecture, controlled access, and industry best practices.
Yes. Recommended spare parts and technical guidance are available.
Yes. AMC and long-term maintenance support are available on request.
Yes. Our engineers provide prompt technical assistance for fault diagnosis and restoration.
We offer decades of engineering expertise, IEC-compliant solutions, and complete lifecycle support.
Yes. Every solution is tailored to project specifications and utility requirements.
Please contact us at mk.protection@ctr.in for technical discussions, project inquiries, and product information.