1SVR730841R1400 – CM-SRS.21S Current monitoring relay, 220-240V AC ABB Current Monitoring Relays

CM-SRS.21S – 220-240V AC, measuring 3-30 mA, 10-100 mA and 0.1-1 A The CM-SRS.21S is a single-functional current monitoring relay from the CM single-phase monitors range. This monitoring relay operates with a rated control supply voltage of 220 – 240 V AC and has a 2 c/o (SPDT) output with contacts rated at 250 V / 4 A. It provides a RMS measuring principle for DC and AC currents with 3 measuring ranges: 3-30 mA, 10-100 mA and 0.1-1 A and works according to the open-circuit principle. The CM-SRS.21S is configurable for over- or undercurrent monitoring. The hysteresis is adjustable within a range of 3 to 30 % of the threshold value and the tripping delay is adjustable over a range of instantaneous to 30 s (0, 0.1-30 s). A sealable transparent cover for protection against unauthorized changes is available as accessory. The device offers screw connection technology with double-chamber cage connection terminals.

1SVR730841R1400 – CM-SRS.21S Current monitoring relay, 220-240V AC ABB Current Monitoring Relays is a genuine ABB electrical component designed for industrial automation, motor control, and power distribution applications.

ABB products are widely used across commercial and industrial installations where reliability, safety, and long operational life are required.

Applications

• Industrial automation
• Motor control systems
• Power distribution infrastructure
• Commercial electrical installations

Browse Related Categories

Current Monitoring Relays | Timers and Control Relays | Modular Protection Relays

How to order

Contact us for bulk pricing, lead times and ordering codes. Add the item to your cart to order online, or request a quotation if you need a formal quote document, project pricing or a written lead time.

Stock & lead time

Some items are held off-site rather than in our Johannesburg warehouse. Where that is the case, availability is confirmed once a quote is requested or an order is placed, and the lead time is confirmed in writing on your quotation.

Delivery

Nationwide delivery across South Africa, export delivery to the rest of Africa on request, and collection available from our Johannesburg branch.