Beckwith PRIDE M‑0420 Multifunction Relay Protection Module

The Beckwith PRIDE M‑0420 is a compact, multifunction relay protection module designed for distributed power system protection and control applications. It is powered by a 48 VDC control supply, making it suitable for substation and industrial environments where DC power is standard. The M‑0420 integrates multiple protection elements including overcurrent, undervoltage, overvoltage, frequency, and directional power functions into a single module, offering flexible protection for feeders, transformers, motors, and generators.

Protection and Control Functions

The relay provides programmable protection with independent pickup and time delay settings for each function. It supports both definite‑time and inverse‑time characteristics. The M‑0420 includes a programmable logic controller (PLC) function for custom protection schemes, allowing users to create complex logic using Boolean operators. It also features a built‑in event recorder with time‑stamped data for post‑fault analysis.

User Interface and Communication

A front‑panel LCD display and keypad allow local programming and monitoring. Communication ports include RS‑232 and RS‑485, supporting Modbus RTU and DNP3 protocols. The module includes LED indicators for status and alarm conditions.

Technical Specifications

Control power: 48 VDC ±10%. Voltage input: 100‑480 VAC, 50/60 Hz. Current input: 1 A or 5 A secondary. Accuracy: ±0.5% for voltage/current. Output contacts: 2 Form C, rated 5 A at 250 VAC. Operating temperature: –30°C to +65°C. Enclosure: IP30, panel‑mount.

Applications

The M‑0420 is used for protection of feeders, motors, transformers, and generators in industrial plants, utility substations, and marine systems.

Installation and Commissioning

Mount the module in a panel. Connect inputs and control power. Commissioning involves programming protection elements and performing tests.

Reliability and Quality

Beckwith’s M‑0420 is built with industrial‑grade components and tested for environmental resilience.

Conclusion

The Beckwith PRIDE M‑0420 multifunction relay protection module offers versatile, reliable protection for power systems.