Specifications

Technical Reference

Legislation and Compliance

Product Details

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Select all	Attribute	Value
	Brand	ABB
	Monitoring Application	Current
	Electrical Phase	1
	Contact Configuration	DPDT
	Mounting Type	DIN Rail
	Minimum Current Sensed	0.1 A, 3 mA, 10mA
	Maximum Current Sensed	1 A, 30 mA, 100mA
	Current Sensitivity	Overcurrent, Undercurrent
	Time Delay	0 s, 0.1 → 30s
	Frequency Sensing Range	50 → 60Hz
	Series	CM-SRS
	Current Range	0.1 → 1 A, 10 → 100 mA, 3 → 30mA
	Terminal Type	Screw
	Length	103.7mm
	Width	22.5mm
	Maximum Operating Temperature	+60°C
	Minimum Operating Temperature	-20°C
	Height	85.6mm
	Operating Temperature Range	+60°C
	Dimensions	103.7 x 22.5 x 85.6mm

	Select all
	Brand ABB
	Monitoring Application Current
	Electrical Phase 1
	Contact Configuration DPDT
	Mounting Type DIN Rail
	Minimum Current Sensed 0.1 A, 3 mA, 10mA
	Maximum Current Sensed 1 A, 30 mA, 100mA
	Current Sensitivity Overcurrent, Undercurrent
	Time Delay 0 s, 0.1 → 30s
	Frequency Sensing Range 50 → 60Hz
	Series CM-SRS
	Current Range 0.1 → 1 A, 10 → 100 mA, 3 → 30mA
	Terminal Type Screw
	Length 103.7mm
	Width 22.5mm
	Maximum Operating Temperature +60°C
	Minimum Operating Temperature -20°C
	Height 85.6mm
	Operating Temperature Range +60°C
	Dimensions 103.7 x 22.5 x 85.6mm

COO (Country of Origin):: DE

ABB CM-SRS Series Monitoring Relay, 0.1 to 1A Current Range, DPDT Contact Configuration - 1SVR730840R0400 CM-SRS.21S

This monitoring relay is designed for current monitoring applications within industrial settings. With dimensions of 103.7 x 22.5 x 85.6mm, it excels in both undercurrent and overcurrent protection. This device meets IEC standards, ensuring compliance and reliability in various electrical systems.

Features & Benefits

• Detects currents from 0.1A to 1A for versatile applications
• DPDT contact configuration allows flexible circuit integration
• Quick response time with adjustable time delay of up to 30s
• Suitable for operating temperature range of -20 to +60°C
• Compact design optimised for DIN rail mounting
• Senses frequencies between 50 and 60Hz for precision monitoring

Applications

• Used for back-up power systems to monitor load conditions
• Utilised in motors to prevent overcurrent and undercurrent issues
• Ideal for automation systems requiring real-time current feedback
• Supports safety protocols by reporting abnormal current levels
• Enables efficient control in industrial electrical networks

What is the significance of the current sensitivity range in this relay?

The current sensitivity range allows the relay to detect and respond to low-current variations, ensuring that even minor fluctuations are monitored, which helps prevent potential equipment damage.

How does the time delay function contribute to operational efficiency?

The adjustable time delay function allows fine-tuning of response times to better suit specific applications, helping to avoid unnecessary trips while maintaining system protection.

What type of terminal connection does this relay utilise?

It features screw-type terminals, facilitating secure connections for reliable performance in demanding environments.

What is the maximum operating temperature for this relay?

The relay can operate effectively up to a maximum temperature of +60°C, ensuring functionality in warmer settings without compromising safety.

Units	Per unit
1 - 4	£195.94
5 - 9	£186.15
10 - 24	£176.34
25 - 49	£166.55
50 +	£156.75

ABB Current Monitoring Relay, 1 Phase, DPDT, DIN Rail

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