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)