50
1MRS 750942-MUM
Combined Overvoltage and Undervoltage Relay
Technical Reference Manual
REU 523
4.2.3. Technical data
1)
For dimension drawings, refer to the Installation Manual (1MRS 750526-MUM).
Table 4.2.3-1 Dimensions
1)
Width, frame 111.4 mm, box 94 mm
Height, frame 265.9 mm (6U), box 249.8 mm
Depth 235 mm (245.1 mm with a protective rear cover, available as an option)
Enclosure size 1/4 (x 19”)
Weight of the relay ~3.2 kg
Table 4.2.3-2 Power supply
U
aux
rated U
r
=110/120/220/240 V ac
U
r
=48/60/110/125/220 V dc
U
aux
variation 80…265 V ac
38…265 V dc
Relay power start-up time, typical 300 ms
Burden of auxiliary voltage supply under quiescent/
operating condition
~ 4 W/~10 W
Ripple in the dc auxiliary voltage Max 12% of the dc value
Interruption time in the auxiliary dc voltage without
resetting the relay
< 30 ms at 48 V dc
< 100 ms at 110 V dc
< 500 ms at 220 V dc
Table 4.2.3-3 Energizing inputs
Rated frequency 50/60 Hz ±5 Hz
Rated voltage, U
n
100/110/115/120 V
Maximum input voltage
• continuously 2 x U
n
• for 10 s 3 x U
n
Power consumption at U
n
< 0.1 VA (typical 0.03 VA)
Thermal withstand capability
• continuously 2 x U
n
• for 10 s 3 x U
n
Input impedance > 4.7 MΩ
Table 4.2.3-4 Measuring range
Measured voltages on phases U
12
, U
23
and U
31
as
multiples of the rated voltages of the energizing inputs
0…2 x U
n
Measuring accuracy (f
n
±5 Hz) at 0.20...2.00 x U
n
±1.5%
Table 4.2.3-5 Binary input
Operating range 18…265 V dc
Rated voltage 24/48/60/110/220 V dc
Current drain ~ 2…25 mA
Power consumption < 0.8 W
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