ABB REX 521 Technical Reference Manual, General

44
1MRS 751108-MUM
Protection Relay
Technical Reference Manual, General
REX 521
4.2. Design description
4.2.1. Technical data
Table 4.2.1-1 Energizing inputs
Rated frequency 50.0/60.0 Hz
Current inputs Rated current 0,2 A/1 A/5 A
Thermal withstand
capability
continuously 1.5 A/4 A/20 A
for 1 s 20 A/100 A/500 A
dynamic current withstand, half-wave
value
50 A/250 A/1250 A
input impedance <750 mΩ/<100mΩ/
<20 mΩ
Voltage inputs rated voltage 100 V/110 V/115 V/120 V
(parametrization)
voltage withstand, continuous 2 x U
n
(240 V)
burden at rated voltage <0.5 VA
Sensor inputs voltage range RMS 9.4 V RMS
voltage range peak ± 12 V
input impedance >4.7 MΩ
input capacitance <1 nF
Table 4.2.1-2 Auxiliary power supplies
Type PS_87H
(REX521xxHxx)
PS_87L
(REX521xxLxx)
Input voltage, AC 110/120/220/240 V -
Input voltage, DC 110/125/220 V 24/48/60 V
Voltage variation AC 85…110%, DC
80…120% of rated value
DC 80…120% of rated value
Burden <20 W
Ripple in DC auxiliary voltage max. 12% of the rated DC value (IEC 60255-11)
Interruption time in auxiliary DC
voltage without resetting
<40 ms, 110 V
<100 ms, 200 V
<15 ms, 24 V
<50 ms, 48 V
Internal overtemperature
indication
+78°C (+75…+83°C)
Table 4.2.1-3 Digital inputs
Type PS_87H
(REX521xxHxx)
PS_87L
(REX521xxLxx)
Operating range, DC 80…265 V DC
DI9: 18...265 V
18...265 V
Input voltage, DC DI1...DI8: 110/125/220 V
DI9: 24/48/60/110/125/220 V)
DI1...DI9:
24/48/60/110/125/220 V
Current drain ~2…25 mA
Power consumption/input <0.8 W
Table 4.2.1-4 Signal outputs
Max. system voltage 250 V AC/DC
Continuous carry 5 A
Make and carry for 0.5 s 10 A
Make and carry for 3 s 8 A
Breaking capacity when control
circuit time-constant L/R <40 ms,
at 48/110/220 V DC
1 A/0.25 A/0.15 A

ABB REX 521 Specifications

General

Brand	ABB
Model	REX 521
Category	Other
Language	English