Page 78 - EPR Catalog 2015

Current and voltage monitoring relays, single-phase
Benefits and advantages

2

2CDC 251 056 V0011
2CDC 251 059 V0011

Characteristics current and voltage monitoring relays Current monitoring, single-phase
The ABB current monitoring relays CM-SRS.xx
– Monitoring of DC and AC currents: 3 mA to 15 A 1) reliably monitor the occurence of currents that
exceed or fall below the selected threshold value.
– Monitoring of DC and AC voltages from 3-600 V The functions overcurrent or undercurrent monitor-
ing can be preselected. Single- and multifunction
– TRMS measuring principle devices for the monitoring of direct or alternating
currents from 3 mA to 15 A are available.
– One device includes 3 measuring ranges
Current window monitoring (Imin, Imax)
– One device includes 4 measuring ranges: 3-30 V; 6-60 V; The window monitoring relay CM-SFS.2x is avail-
able if the application requires the simultaneous
30-300 V; 60-600 V monitoring of over- and undercurrents.

– Over- and undercurrent monitoring1) Voltage monitoring, single-phase
The ABB voltage monitoring relays CM-SRS.xx
– Over- and undervoltage monitoring1) are used to monitor direct and alternating voltages
within a range of 3-600 V. Over- or undervoltage
– ON or OFF-delay configurable1) detection can be preselected.

– Open- or closed-circuit principle configurable1) Voltage window monitoring (Umin, Umax)
For the simultaneous detection of over- and under-
– Threshold values for >U and/or <U adjustable1) voltages, the window monitoring relay CM-EFS.2
can be used.
– Latching function configurable1)

– Thresholds for >I and/or <I adjustable1)

– Fixed hysteresis of 5 %1)

– Start-up delay Tv adjustable 0; 0.1-30 s1)
– Tripping delay Tv adjustable 0; 0.1-30 s1)

– 1 x 2 c/o contacts (common signal) or 2 x 1 c/o contact

(separate signals for >I and <I) configurable 1)

– 1 x 2 c/o contacts (common signal) or 2 x 1 c/o contact

(separate signals for >U and <U) configurable1)

– 22.5 mm width

– 3 LEDs for the indication of operational states

– Approvals / Marks
2)

ACRKEL /a b

1) depending on device
2) Applicable in rail application following the latest standards for rail applications:

NF F 16-101/102 (I2/F2 classified), EN 45545 (Hazard Level 3), DIN 5510, EN 50155, IEC 60571.
Further information is available in our rail segment brochure 2CDC110084B0201.

2/11 ABB | Catalog Electronic Products and Relays 2015 | 2CDC 110 004 C0210