SELCO Frequency Relay T3000.0020 | Generator Protection Relay

T3000.0020 Frequency Relay (450V / 400V)

The T3000.0020 Frequency Relay is a high-precision monitoring device designed to ensure the stability and protection of power distribution systems operating at 450V or 400V. It is a highly reliable and cost-effective solution for monitoring frequency fluctuations in generators, busbars, and power distribution systems. Designed for marine and land-based applications, it is part of the SELCO T-Line series, which offers modular protection, control, and monitoring for critical power systems.

Equipped with dual monitoring circuits, the relay continuously tracks over-frequency and under-frequency conditions, ensuring stable operation and preventing system failures. Each circuit features adjustable presetting knobs and time-delayed output relays, providing precise frequency control. The normally energized relays activate when the frequency exceeds or drops below the preset threshold, ensuring a fast and accurate response.

With clear LED indicators, the T3000 provides instant visual feedback for power status, frequency pickup, and relay tripping. It also features a high-precision digital countdown timer, a wide supply voltage range (70-110%), and an enclosure made from flame-retardant polycarbonate for enhanced safety and durability.

The T3000 Frequency Relay meets strict marine classification standards, undergoing a rigorous 50-hour burn-in test before final approval. Its compact and robust design makes it ideal for demanding industrial applications, offering easy installation via a 35mm DIN rail or screw mounting.

Technical Specifications

This compact and rugged frequency relay ensures reliable protection and monitoring for critical power systems, making it an essential component for generators and distribution networks.