Page 86 - EPR Catalog 2015
P. 86
Current and voltage monitoring relays, single-phase
Function diagrams
Function diagrams - CM-ESS.M
Overvoltage monitoring d without latching e 2CDC 252 228 F0205 Undervoltage monitoring c without latching e 2CDC 252 229 F0205
A1-A2 A1-A2
Threshold Measured value
Hysteresis
Hysteresis Threshold
Measured value < TV TV < TV Open-circuit principle open
2 Open-circuit principle open 11-14 (15-18) < TV TV < TV
11-14 (15-18) 11-12 (15-16)
11-12 (15-16)
21-24 (25-28) 21-24 (25-28)
21-22 (25-26) 21-22 (25-26)
green LED green LED
red LED red LED
yellow LED yellow LED
Closed-circuit principle closed Closed-circuit principle closed
11-14 (15-18)
11-14 (15-18) 11-12 (15-16)
11-12 (15-16) 21-24 (25-28)
21-22 (25-26)
21-24 (25-28)
21-22 (25-26)
green LED green LED
red LED red LED
yellow LED yellow LED
Overvoltage monitoring d with latching f Undervoltage monitoring c without latching f
A1-A2 Reset 2CDC 252 230 F0205 A1-A2 Reset 2CDC 252 231 F0205
Measured value
Threshold
Hysteresis Hysteresis
Measured value
Threshold
Open-circuit principle open
11-14 (15-18) < TV TV < TV Open-circuit principle open < TV TV < TV
11-12 (15-16) 11-14 (15-18)
21-24 (25-28) 11-12 (15-16)
21-22 (25-26) 21-24 (25-28)
green LED 21-22 (25-26)
red LED
yellow LED green LED
Closed-circuit principle closed red LED
11-14 (15-18)
11-12 (15-16) yellow LED
21-24 (25-28)
21-22 (25-26) Closed-circuit principle closed
green LED 11-14 (15-18)
red LED 11-12 (15-16)
yellow LED 21-24 (25-28)
21-22 (25-26)
green LED
red LED
yellow LED
If the measured value exceeds resp. drops below the adjusted threshold value, the tripping delay TV starts. If TV is complete
and the measured value is still exceeding resp. below the threshold value plus resp. minus the set hysteresis, the output relays
energize h / de-energize g.
If the measured value exceeds resp. drops below the threshold value plus resp. minus the set hysteresis and the latching func-
tion is not activated e, the output relays de-energize h / energize g. With activated latching function f the output relays
remain energized h and de-energize only, when the supply voltage is interrupted / the output relays remain de-energized g
and energize only, when the supply voltage is switched off and then again switched on = Reset. The hysteresis is adjustable
within a range of 3-30 % of the threshold value. Further function diagrams see data sheet.
Voltage window monitoring 1x2 c/o contact j
ON-delayed A without latching e
A1-A2 < TV TV ON-delayed A voltage window monitoring with parallel switching c/o contacts j:2CDC 252 232 F0205
Thresholdmax If the measured value exceeds resp. drops below the adjusted threshold value, the tripping de-
Hysteresis
< TV
Measured value
lay TV starts, when A is configured. If TV is complete and the measured value is still exceeding
Hysteresis resp. below the threshold value minus resp. plus the fixed hysteresis (5%), the output relays
Thresholdmin
energize h /de-energize g.
Open-circuit principle open
11-14 (15-18) If the measured value exceeds resp. drops below the threshold value plus resp. minus the
11-12 (15-16)
21-24 (25-28) hysteresis and the latching function is not activated e, the output relays de-energize h /
21-22 (25-26)
green LED energize g. With activated latching function e the output relays remain energized h and
red LED
yellow LED de-energize only, when the supply voltage is interrupted / the output relays remain de-ener-
Closed-circuit principle closed gized g and energize only, when the supply voltage is switched off and then again switched
11-14 (15-18)
11-12 (15-16) on = Reset.
21-24 (25-28)
21-22 (25-26)
green LED
red LED
yellow LED
Voltage window monitoring 1x2 c/o contact j
OFF-delayed B without latching e
A1-A2 TV 2CDC 252 233 F0205OFF-delayed B voltage window monitoring with parallel switching c/o contacts j:
Thresholdmax If the measured value exceeds resp. drops below the adjusted threshold value, the output
Hysteresis TV relays energize h / de-energize g, when B is configured, and remain in this position during
Measured value the set tripping delay TV.
If the measured value exceeds resp. drops below the threshold value plus resp. minus the
Hysteresis
Thresholdmin fixed hysteresis (5%) and the latching function is not activated e, the tripping delay TV starts.
After completion of TV, the output relays de-energize h / energize g, provided that the latch-
Open-circuit principle open ing function is not activated e. With activated latching function e the output relays remain
11-14 (15-18)
11-12 (15-16) energized h and de-energize only, when the supply voltage is interrupted / the output relays
21-24 (25-28)
21-22 (25-26) remain de-energized g and energize only, when the supply voltage is switched off and then
green LED
red LED again switched on = Reset.
yellow LED
When i is adjusted on the device, the functionality is equivalent to the one described above.
Closed-circuit principle closed
11-14 (15-18) There is only to consider that in this case, instead of both output relays, only one output relay
11-12 (15-16)
21-24 (25-28) each will be switched.
21-22 (25-26)
green LED “>U“ = 1115-1216/1418 ; “<U“ = 2125-2226/2428
red LED
yellow LED
2/19 ABB | Catalog Electronic Products and Relays 2015 | 2CDC 110 004 C0210
