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ABB Voltage monitoring relay CM-ESS 2CDC112103D0202
ABB Voltage monitoring relay CM-ESS 2CDC112103D0202
DESCRIPTION
For the monitoring of voltages in single-phase AC/DC systems, ABB’s CM range comprises a wide selection of powerful and compact devices, all featuring only 22.5 mm (0.89 in) width. This range includes voltage monitoring relays for over- and undervoltage protection from 3 V to 600 V.
Incorporating ABB’s long-term experience, the CM range provides your electric installation with the highest safety and reliability.
Characteristics
– Monitoring of DC and AC voltages from 3-600 V
– TRMS measuring principle
– One device includes 4 measuring ranges
– Over- or undervoltage monitoring configurable
– Open- or closed-circuit principle configurable
– Latching function configurable
– Hysteresis adjustable from 3-30 %
– Tripping delay TV adjustable 0; 0.1-30 s
– 2 c/o contacts
– 22.5 mm (0.89 in) width
– 3 LEDs for indication of operational states
Application
Depending on the configuration, the voltage monitoring relay CM-ESS.M can be used for over- d or undervoltage monitoring c in single-phase AC and/or DC systems. Open- h or closed-circuit principle g are selectable.
Operating mode
The voltage monitoring relay CM-ESS.M has 2 c/o contacts. One device includes 4 measuring ranges: 3-30 V, 6-60 V, 30-300 V, and 60-600 V.
The unit is adjusted with potentiometers and switches on the top of the unit. The selection of over- d or undervoltage monitoring c, open- h or closed-circuit principle g, and latching function ON f or OFF e is made with DIP switches. Potentiometers, with direct reading scale, allow the adjustment of the threshold value U, of the hysteresis % and of the tripping delay TV. The hysteresis % is adjustable within a range of 3 to 30 % of the threshold value, and the tripping delay TV over a range of instantaneous to a 30 s delay.
SPECIFICATION
Rated control supply voltage US:24-240 V AC
Rated control supply voltage tolerance:-15...+10 %
Rated frequency:50/60 Hz
On-period:100 %
Power failure buffering time:20 ms
Transient overvoltage protection:varistors
Monitoring function:over- or undervoltage monitoring configurable
Measuring method:TRMS measuring principle
Threshold value:adjustable within the indicated measuring range
Tolerance of the adjusted threshold value:10 % of the range end value
Hysteresis related to the threshold value:3-30 % adjustable
Measuring signal frequency range:DC / 15 Hz - 2 kHz
Rated measuring signal frequency range:DC / 50-60 Hz
Delay time TV:0 or 0.1-30 s adjustable
Repeat accuracy (constant parameters):±0.07 % of full scale
Wire size:2 x 0.75-2.5 mm² (2 x 18-14 AWG)
Stripping length:7 mm (0.28 in)
Tightening torque:0.6-0.8 Nm (5.31-7.08 lb.in)
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