1SVR730841R1500 ABB CM-SRS.22S Current Monitoring Relay 220–240 V AC

Why Choose the ABB CM-SRS.22S Current Monitoring Relay?

The ABB CM-SRS.22S is a compact single-phase current monitoring relay designed for reliable overcurrent or undercurrent supervision in industrial control and automation systems. With ABB order code 1SVR730841R1500, this CM-SRS series relay operates from a 220–240 V AC control supply and uses an RMS measuring principle for monitoring both AC and DC currents.

The CM-SRS.22S provides three selectable measuring ranges of 0.3–1.5 A, 1–5 A and 3–15 A. It can be configured for either overcurrent or undercurrent monitoring, while adjustable hysteresis from 3–30% of the selected threshold value enables stable switching behaviour tailored to the application.

Two changeover (SPDT) output contacts rated at 250 V / 4 A provide flexible interfacing with PLC inputs, contactors, alarms and interlocking circuits. An adjustable ON-delay tripping time of 0 or 0.1–30 s, screw connection technology and a compact 22.5 mm housing make the CM-SRS.22S well suited to DIN-rail control-panel installations.

Key Advantages

• Reliable overcurrent or undercurrent monitoring for industrial electrical systems.
• 220–240 V AC control supply for compatible industrial control circuits.
• Three selectable measuring ranges covering 0.3–15 A.
• RMS measuring principle supports AC and DC current monitoring.
• Adjustable 3–30% hysteresis for stable threshold switching.
• Adjustable 0 or 0.1–30 s tripping delay helps accommodate transient current conditions.
• Two changeover output contacts provide flexible control and signalling options.
• Compact 22.5 mm-wide housing conserves DIN-rail space.

Key Features

• ABB CM-SRS single-phase current monitoring relay series.
• 220–240 V AC rated control supply voltage.
• Configurable overcurrent or undercurrent monitoring.
• Selectable measuring ranges of 0.3–1.5 A, 1–5 A and 3–15 A.
• RMS measuring principle for AC and DC currents.
• 3–30% adjustable hysteresis.
• 0 or 0.1–30 s adjustable ON-delay tripping time.
• 2 c/o (SPDT) relay outputs.
• Output contacts rated at 250 V / 4 A.
• Open-circuit operating principle.
• Screw connection technology with double-chamber cage terminals.
• Compact DIN-rail mounting format.

Reliable Current Monitoring for Industrial Systems

Current monitoring relays enable industrial control systems to identify electrical loads operating above or below defined current limits. The ABB CM-SRS.22S can be configured for overcurrent or undercurrent supervision, making it suitable for detecting excessive load, underload, loss of load and other current-dependent operating conditions.

Its three selectable RMS measuring ranges enable supervision from 0.3 A up to 15 A. Adjustable hysteresis provides stable switching around the selected threshold, while the adjustable tripping delay can help prevent brief current variations from causing unnecessary alarm, control or shutdown actions.

Typical Applications

• Industrial control and automation panels.
• AC and DC current supervision.
• Motor overload and underload monitoring.
• Pump and fan operating-state monitoring.
• Conveyor and material handling equipment.
• Heating element and electrical load supervision.
• Alarm, signalling and interlocking circuits.
• OEM machinery and production equipment.