ABB CM-IWM.10 1SVR470670R1000

Overview

ABB CM-IWM.10, part number 1SVR470670R1000, is an insulation monitoring relay from ABB CM‑IWM series. It is designed for IT (ungrounded) AC and DC systems, continuously measuring insulation resistance between live conductors and earth, widely supplied as exchange spare for UPS systems, medical isolated power panels, marine distribution, battery energy storage and industrial IT network cabinet overhaul and replacement.

Features

ABB CM-IWM.10 1SVR470670R1000 monitors insulation resistance on single‑phase or three‑phase AC, DC and mixed AC/DC IT systems. Two adjustable threshold stages are available: pre‑warning alarm and fault alarm, with separate relay outputs for tiered notification. The front rotary knobs set resistance values, and LED indicators show operating status, pre‑alarm and insulation fault.

ABB CM-IWM.10 1SVR470670R1000 supports automatic self‑test function to verify internal measurement circuit health. It includes fault latch option and can be reset locally or remotely. The unit offers galvanic separation between the monitored power circuit and the relay output side. It complies with IEC 61557‑8, IEC 60601‑1 for medical locations and EMC standards. The slim housing fits standard DIN rail cabinet layouts.

Specs

ABB CM-IWM.10 1SVR470670R1000Platform: ABB CM‑IWM insulation monitoring series Type: insulation monitoring device (IMD) Catalog number: CM-IWM.10 Order code: 1SVR470670R1000 Monitored system: AC, DC, AC/DC mixed IT systems Monitoring range: adjustable insulation resistance Alarm stages: 2 threshold levels, 2 relay outputs Local features: rotary setting knobs, status LEDs, self-test Supply voltage: 24–240 V AC/DC Mounting: DIN TH35 rail Protection rating: IP20 This is not an isolator, earth fault relay or circuit breaker; it is an insulation monitoring relay for ungrounded IT power networks. ABB CM-IWM.10 1SVR470670R1000 is widely supplied as service replacement spare for IT system insulation supervision failure.

Principle

ABB CM-IWM.10 1SVR470670R1000 injects a low test signal into the ungrounded IT network and calculates insulation resistance to earth. When insulation degrades below the first set value, the pre‑alarm relay activates; if resistance falls below the fault threshold, the fault relay triggers. The relay contacts send signals to PLC, SCADA or local alarm annunciators, allowing maintenance before a second earth fault creates a short circuit.

Applications

ABB CM-IWM.10 1SVR470670R1000 is deployed for hospital medical isolated power circuits, marine LV distribution, battery storage systems, DC UPS and mining IT networks. It is selected for spare inventory and control panel retrofit projects for existing ABB CM‑IWM insulation supervision systems.