Page 122 - EPR Catalog 2015

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

Technical data
Data at Ta = 25 °C and rated values, unless otherwise indicated

2 Type CM-UFD.M22 CM-UFD.M31 CM-UFD.M33
Input circuit - Supply circuit

Rated control supply voltage Us 24-240 V AC/DC
Rated control supply voltage Us tolerance
Rated frequency -15…+10 %
Frequency range AC
Typical current / power consumption DC or 50 Hz DC or 50/60 Hz

External fusing (necessary) 40-60 Hz 40-70 Hz

24 V DC 64 mA / 1.5 W

230 V AC 6.4 mA / 1.5 VA

6 A gG (gL) or cirucit breaker 6 A with B characteristic or 6 A Class CC

(acc. to UL-requirements)

Power failure buffering time 200 ms, according to LVFRT (Low Voltage Fault Ride Through)

Measuring circuit

Monitoring functions overvoltage 10-min average (>UAV) adjustable, threshold adjustable, 1.000-1.300 * Un
1.00-1.30 * Us in 0.005 * Un steps
in 0.01*Us steps
threshold adjustable, 1.000-1.300 * Un
overvoltage (>U1) adjustable, in 0.005 * Un steps
1.00-1.20 * Us
in 0.01*Us steps threshold adjustable, 1.000-1.300 * Un
in 0.005 * Un steps
overvoltage (>U2) - threshold adjustable, 0.100-1.000 * Un
in 0.005 * Un steps
undervoltage (<U1) adjustable,
0.05-1.00 * Us threshold adjustable, 0.100-1.000 * Un
in 0.01*Us steps in 0.005 * Un steps

undervoltage (<U2) adjustable, threshold adjustable, 50.00-65.00 Hz
0.05-1.00 * Us in 0.01 Hz steps
in 0.01*Us steps

overfrequency (>F1) adjustable,
50.0-54.0 Hz
in 0.1 Hz steps

underfrequency (<F2) adjustable, threshold adjustable, 50.00-65.00 Hz
46.0-50.0 Hz in 0.01 Hz steps
in 0.1 Hz steps

overfrequency (>F1) adjustable, threshold adjustable, 45.00-60.00 Hz
50.0-54.0 Hz in 0.01 Hz steps
in 0.1 Hz steps

underfrequency (<F2) adjustable, threshold adjustable, 45.00-60.00 Hz
46.0-50.0 Hz in 0.01 Hz steps
in 0.1 Hz steps

ROCOF adjustable, threshold adjustable, 0.100-5.000 Hz
0.1-1.0 Hz/s, in 0.005 Hz steps
in 0.1 Hz/s steps

vector shift threshold adjustable, 2.0-40.0 ° in 0.1 ° steps

interrupted neutral conductor enabled if a measuring principle with interrupted neutral conductor is
selected

Measuring ranges voltage (4-wire system L1, L2, L3-N) 0-312 V AC 0-317 V AC

(3-wire system L1,L2,L3) 0-540 V AC 0-550 V AC

(2-wire system L-N) 0-312 V AC 0-317 V AC

frequency 40-60 Hz 40-70 Hz

Rated frequency of the measuring signal 50 Hz 50/60 Hz

Accuracy of measurements voltage ≤ 2 % ≤ 0.5 % ± 0.5 V

frequency ± 20 mHz ± 20 mHz

delay times ≤ 5 % ± 20 ms ≤ 0.1 % ± 20 ms

Accuracy within the temperature range ΔU ≤ 0.02 %/°C

Hysteresis related to the overvoltage 10-min average - adjustable, 0.1-10.0 % in 0.1 % steps
threshold value overvoltage 0.95-0.97 * Us adjustable, 0.5-10.0 % in 0.1 % steps

undervoltage 1.03-1.05 * Us adjustable, 0.5-10.0 % in 0.1 % steps

overfrequency 0.997-0.999 * fn adjustable, 0.05-4.00 Hz in 0.01 Hz steps

underfrequency 1.001-1.003 * fn adjustable, 0.05-4.00 Hz in 0.01 Hz steps

Reaction time acc. CEI 0-21 chapter A.4.3 CM-UFD.M22: adjustable, 0.05-600.00 s in 0.05 s steps, ±3 % ±20 ms

for: Overvoltage 2, Undervoltage 1, Undervoltage 2, Overfrequency 1,
Overfrequency 2, Underfrequency 1, Underfrequency 2

Measuring cycle ROCOF 640 ms at 50 Hz adjustable, 4-50 periods

2/55 ABB | Catalog Electronic Products and Relays 2015 | 2CDC 110 004 C0210