ABB Monitoring Relay 1 Phase DPDT DIN Rail 0.1mA to 100mA 240 V dc 240V ac 1SVR740840R0400 CM-SRS.21P

ABB 1SVR740840R0400 CM-SRS.21P is a premium monitoring relay designed for accurate detection of undercurrent and overcurrent in single-phase AC/DC electrical systems. It incorporates DPDT (Double Pole Double Throw) contacts and mounts easily on standard DIN rails, making it a versatile component for automation and electrical control panels.

The relay operates at supply voltages of 240 V dc and 240 V ac, capable of sensing currents as low as 0.1mA up to 100mA. The device employs an open-circuit principle where the measured current is applied to terminals B1/B2/B3-C.

This model features an adjustable hysteresis of 3 to 30% and a programmable tripping delay from 0.1 up to 30 seconds to tailor response times to specific application requirements. Status is indicated via three LEDs for clear monitoring of relay operation.

Designed for industrial use, the CM-SRS series provides reliable monitoring of DC and AC currents with multiple measuring ranges: CM-SRS.x1 covers 3mA to 1A, while CM-SRS.x2 supports 0.3-15A RMS currents. Specifically, the CM-SRS.2 variant offers 2 changeover contacts ensuring robust switching capabilities.

The relay’s compact size (22.5mm width, 103.7mm length, 85.6mm height) allows integration into space-constrained panels. Push-in terminals enable quick and secure wiring, and the IP20 enclosure rating ensures protection against ingress of solid objects.

Compliant with RoHS standards and manufactured in Germany, this monitoring relay is suitable for electrical, automation, industrial, and manufacturing applications requiring precise current monitoring and control.

Operates on 240 V dc and 240 V ac supply voltages. Detects current range from 0.1mA to 100mA with high sensitivity. Adjustable hysteresis and tripping delay enhance customization. Compact DIN rail mounting with push-in terminal connections.

DPDT contact configuration for versatile switching functions. IP20 protection rating for solid object ingress resistance. LED status indication for operational clarity. RoHS compliant and German origin ensure quality assurance.

Ideal for industrial automation, electrical panels, and control systems. Explore the extensive range of reliable Monitoring Relays from ABB for robust electrical current management at EnvMart.