Page 118 - EPR Catalog 2015

Grid feeding monitoring relays -
Voltage and frequency monitoring functions
Benefits and advantages, operating controls

Characteristics for all CM-UFD devices Characteristics CM-UFD.M22
– Monitoring of voltage and frequency in single- and three- – ROCOF (rate of change of frequency) monitoring, configurable
– Third party certificate confirming accordance with CEI 0-21
phase mains 2-wire, 3-wire or 4-wire – Pre-setting according to CEI 0-21

2 – Over- and undervoltage, 10 minutes average value as well Characteristics CM-UFD.M31
– ROCOF (rate of change of frequency) monitoring and vec-
as over- and underfrequency monitoring
– Two-level threshold settings for over-/undervoltage and tor shift detection, configurable
– Third party certificate confirming accordance with
frequency
– Multiline, backlit LCD display VDE-AR-N 4105 and BDEW
– All threshold values adjustable as absolute values – Pre-settings according to VDE-AR-N 4105 and BDEW
– True RMS measuring principle
– High measurement accuracy Characteristics CM-UFD.M33
– 3 control inputs for remote trip, feedback signal, and – ROCOF (rate of change of frequency) monitoring and vec-

external signal tor shift detection, configurable
– Interrupted neutral detection – Factory certificate confirming accordance with Engineering
– Error memory for up to 99 entries (incl. cause of error,
Recommendation G59 Issue 3 - September 2013; Engi-
measured value, relative timestamp) neering Recommendation G83 Issue 2 - December 2012
– Test function – Pre-setting according to G59/3 LV + G83/2 HV
– Password setting protection – UL 508, CAN/CSA C22.2 No.14
– 3 c/o (SPDT) contacts
– LEDs for the indication of operational states

CM-UFD.Mxx

2CDC 253 020 F0013 1
1 Display
R1 R2 R3 - relay status; in this case R3 is de-energized
FB - status feedback loop Y0-Y1; in this case FB is closed
EXT – status input external signal; in this case input is closed

2 REM – status remote trip input; in this case input is closed

2 Indication of operational states
U/T: green LED – supply voltage applied / flashing = timing active
F: red LED - failure

3
3 Keypad
ESC: escape / return to previous menu
: up / value increase

›^: down / value decrease

OK: enter / confirm selection

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