Page 123 - EPR Catalog 2015

Grid feeding monitoring relays -
Voltage and frequency monitoring functions
Technical data - CM-UFD.Mxx

Type CM-UFD.M22 CM-UFD.M31 CM-UFD.M33

Control circuits

Number 3 2

Type of triggering volt-free triggering, signal source Y0

Function of the control inputs Y1-Y0 Control input 1 DDI feedback, trip and feedback from switching device 1
release monitoring
times adjustable

Y2-Y0 Control input 2 External signal feedback from switching device 2
Y3-Y0 Control input 3 Remote trip
remote trip; suppression of Y1, Y2, Y1/Y2 or
vector shift detect.

Electrical isolation from supply voltage yes

from the measuring circuit no

from the relay outputs yes

Max. switching current in the control circuit 6 mA

No-load voltage at the control inputs (V0-V1, V2, V3) 22-26 V DC

Minimum control pulse length 20 ms

Max. cable length at the control inputs (unshielded) 10 m

Timing functions

Start-up delay, R1 (prior to first grid connection or re-connection after adjustable, -
interruption) 1.00-600.00 s
in 0.05 s steps

Restart delay, R1 adjustable, -
0.05-600.00 s
in 0.05 s steps

Start-up delay, R2 (prior to first grid connection or re-connection after 1 s, fixed -
interruption)

ON-delay, R3 adjustable, -
0.00-10.00 s
in 0.05 s steps

ON-time, R3 adjustable, -
0.05-10.00 s
in 0.05 s steps

Trip window, feedback loop Y1 adjustable, -
0.05-0.50 s
in 0.05 s steps

Release window, feedback loop Y1 adjustable, -
0.50-600.00 s
in 0.05 s steps

Tripping delays adjustable, -
ROCOF error time 0.05-600.00 s -
in 0.05 s steps

Switch-on delay (prior to first grid connection or reconnection after - adjustable, 0.05-600.00 s in 0.01 s steps
interruption)

Tripping delay overvoltage 10-min average (>UAV) - <3s

overvoltage (>U1, >U2) - adjustable, 0.00-600.00 s in 0.01 s steps;
undervoltage (<U1, <U2) +50 ms / -0 ms

overfrequency (>F1, >F2)

underfrequency (<F1, <F2) < 50 ms
ROCOF

vector shift -
interrupted neutral conductor < 150 ms

Error time ROCOF - adjustable, 0.5-600.00s in 0.01 s steps

vector shift - adjustable, 0.5-600.00s in 0.01 s steps

Trip window (feedback loops Y1-Y0, Y2-Y0) - adjustable, 0.05-0.50 s in 0.01 s steps

Release window (feedback loops Y1-Y0, Y2-Y0) - adjustable, 0.50-600.00 s in 0.01 s steps

Time error within the temperature range - Δt ≤ 0.01 %

User interface - Indication of operational states U/T LED green on / flashing
F LED red on
Control supply voltage applied / timing
Fault message
For details see the message on the display

User interface - Display on press any button
Back light off switch-off delay adjustable, 10-600 s (default 10 s)
clearly visible -20…+60 °C
Operating temperature range of the display
Resolution 112 x 64 pixel
Display size 36 x 22 mm

User interface - Operating elements
4 push-buttons for menu navigation, setting and entering

2CDC 110 004 C0210 | Catalog Electronic Products and Relays 2015 | ABB 2/56