Beckwith Electric M‑0420 Multifunction Relay (PRIDE Series)
The Beckwith Electric M‑0420 is a multifunction relay from the PRIDE series, designed for protection of industrial power systems. It combines overcurrent, over/undervoltage, and over/underfrequency protection in a single compact unit, making it ideal for feeder, motor, and transformer protection. The relay operates on a 48 VDC control supply, commonly found in industrial and telecommunications environments.
This relay features adjustable pickup settings, time delays, and multiple curve characteristics. Its solid‑state design ensures fast operation and high reliability, even in harsh conditions.
Key Features
Protection functions: 50, 51, 27, 59, 81, and 46
48 VDC nominal supply (range 36–60 VDC)
Adjustable time overcurrent curves (IEC and US)
Voltage and frequency setpoints with independent time delays
Output relay with form‑C contacts
LED trip indicators and manual reset
Compact panel‑mount enclosure
Technical Specifications
Supply: 48 VDC (36–60 VDC), < 10 W; CT inputs: 1A/5A; PT inputs: 120 VAC; frequency: 50/60 Hz; accuracy: ±2%; output: 1 x SPDT, 5 A; operating temperature: -10°C to +55°C; dimensions: 120 x 80 x 50 mm.
Applications
Used in industrial switchgear, motor control centres, and distribution panels. The relay provides cost‑effective protection for feeders, motors, and small transformers.
Installation and Setting
Mount the relay on a DIN rail or panel. Connect CT, PT, and DC supply. Set the pickup values and time delays using the front‑panel potentiometers and DIP switches. A test point is provided for verification.
Reliability and Maintenance
Solid‑state construction ensures long life with minimal maintenance. The relay is protected against transients and reverse polarity. Periodic inspection is recommended.
Why Choose the M‑0420?
This relay offers a simple and reliable solution for multiple protection functions, with a low‑voltage DC supply option. Beckwith Electric’s quality ensures dependable operation in industrial settings.
In summary, the Beckwith Electric M‑0420 provides versatile and reliable protection for industrial power systems, combining multiple functions in one compact unit.
