Page 91 - EPR Catalog 2015

Voltage monitoring relays, single-phase
Technical data - Voltage monitoring relays

Type CM-ESS.1 CM-ESS.2 CM-ESS.M CM-EFS.2

Input circuit - Supply circuit A1-A2
Rated control supply voltage Us
A1-A2 110-130 V AC 2
Rated control supply voltage Us tolerance A1-A2 220-240 V AC
Rated frequency A1-A2 24-240 V AC/DC

Current / power consumption -15...+10 %
Power failure buffering time
Transient overvoltage protection AC versions 50/60 Hz
AC/DC versions 50/60 Hz or DC

see data sheet
20 ms
Varistors

Input circuit - Measuring circuit B-C
Monitoring function
over- or undervoltage monitoring over- and
configurable undervoltage
monitoring
configurable

Measuring method True RMS measuring principle

Measuring CM-ExS

inputs Terminal connection B-C B-C B-C B-C
60-600 V
Measuring range AC/DC 3-30 V 6-60 V 30-300 V 600 k⏲

Input resistance 600 k⏲ 600 k⏲ 600 k⏲ 800 V
660 V
Pulse overload capacity t < 1 s 800 V 800 V 800 V
5 % fixed
Continous capacity 660 V 660 V 660 V

Threshold value(s) adjustable within the indicated measuring range

Setting accuracy of threshold value 10 %

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

Maximum response time AC: 80 ms / DC: 120 ms

Accuracy within the control supply voltage tolerance ͬU ͨ 0.5 %

Accuracy within the temperature range ͬU ͨ 0.06 % / °C

Transient overvoltage protection Varistors

Timing circuit

Delay time TV none 0 or 0.1-30 s adjustable

Repeat accuracy (constant parameters) Ȁ0.07 % of full scale
Accuracy within the control supply voltage tolerance - ͬt ͨ 0.5 %
Accuracy within the temperature range - ͬt ͨ 0.06 % / °C

Indication of operational states U/T: green LED V: control supply voltage applied
Control supply voltage W: tripping delay TV active

Measured value U: red LED V: overvoltage,
W: undervoltage

Relay status R: yellow LED V: relay energized, no latching function
Z: relay energized, active latching function
Y: relay de-energized, active latching function

Output circuits 1 c/o contact 2 c/o contacts 1x2 c/o contacts or
Kind of output 2x1 c/o contact
configurable
Operating principle open-circuit principle 1) open- or closed-circuit principle
configurable 1)
Contact material AgNi
6 A fast-acting
Rated operational voltage Ue IEC/EN 60947-1 250 V

Minimum switching voltage / minimum switching current 24 V / 10 mA

Maximum switching voltage / maximum switching current 250 V AC / 4 A AC

Rated operational current AC-12 (resistive) at 230 V 4 A

Ie (IEC/EN 60947-5-1) AC-15 (inductive) at 230 V 3 A
DC-12 (resistive) at 24 V 4 A

DC-13 (inductive) at 24 V 2 A

AC rating Utilization category (Control Circuit Rating Code) B 300

(UL 508) max. rated operational voltage 300 V AC

max. continuous thermal current at B 300 5 A

max. making/breaking apparent power 3600/360 VA

(Make/Break) at B 300

Mechanical lifetime 30x106 switching cycles

Electrical lifetime AC-12, 230 V, 4 A 0.1x106 switching cycles

Max. fuse rating to achieve short- n/c contact 6 A fast-acting 10 A fast-acting

circuit protection n/o contact 10 A fast-acting

2CDC 110 004 C0210 | Catalog Electronic Products and Relays 2015 | ABB 2/24