DIGITAL MULTI-FUNCTION VO

RS PRO Digital Voltage Monitoring Relays

RS PRO is proud to present a complete range of control monitoring relays designed for single-phase or 3 phase systems. Each relay is packed with excellent features to ensure effective protection against all types of low voltage faults. These high-quality monitoring devices offer over-voltage and under-voltage protection, protect against voltage phase sequence, phase loss, and phase asymmetry, over & under frequency, and neutral open.

Display Screen

The front panel details on the display screen include fault window and menu feature parameter, line or phase voltage, delay timer status, time in seconds, percentage asymmetry, frequency in Hz, voltage, Instantaneous voltage, or other settable parameters and relay status.

Four key programming

• Escape, scroll up, scroll down and enter

Connection

• Connection for supply voltage and relay is illustrated on the side of the device.

Features and Benefits

• LCD Display with Green Backlight


• DIN Rail mounting


• True RMS Measurement @ 2kHz sampling rate


• Protection against Phase loss, Phase Sequence, Phase Asymmetry, Under Voltage, Over Voltage, Neutral fault, Over Frequency & Under Frequency


• Can be configured for 3-Phase 3-Wire or 3-Phase 4-Wire supplies,145-500VAC (DMA220 50-500VAC)


• Selectable overvoltage/ undervoltage, Asymmetry, Phase Loss, Phase Sequence, Over Frequency Under Frequency & Neutral Fault monitoring

Prominent Features

• Adjustable ON-OFF time delay


• Time Delay in seconds/minutes


• 5A Single and Dual relay outputs


• Two Separate Relay outputs with independent Programming


• Password protection


• Log of 5 previous faults for better monitoring


• Fail-safe/Non-Fail-safe relay configuration


• Latch (Manual-reset) and Non-Latch (Auto-reset) alarm modes

RS PRO Digital Voltage Monitoring Relay Variants

• 145-500 VAC, Digital Voltage Monitoring Relay, 1C/O = RS stock no: 223-7788


• 145-500 VAC, Digital Voltage Monitoring Relay, 1C/O + 1C/O = RS stock no: 223-7789


• 50-500 VAC, Digital Voltage Monitoring Relay with 85-300Vac/dc Auxiliary supply, 1C/O + 1C/O = RS stock no: 223-7790

Applications

• Switchgear


• Control Gear


• Machine Control


• Mains Distribution Systems