ABB REX 521 Technical Reference Manual, General

12
1MRS 751108-MUM
Protection Relay
Technical Reference Manual, General
REX 521
2.3. Hardware versions
Table 2.3.-1 Hardware versions of REX 521
Relay type REX 521
Version name Basic Medium High Sensor
REX521xBxxx REX521xMxxx REX521xHxxx REX521xSxxx
Transformer modules (MIM)
1111
Transformers
• Current transformers 1/5 A 4 4 4 1
• Current transformers 0.2/1 A 1 1 1
• Voltage transformers 100 V 1 4 1
Sensor channels
• Current sensor inputs 3
• Voltage sensor inputs 3
Main CPU modules
1111
CPU_SP (SPA/ IEC/MODBUS plastic)
CPU_SG (SPA/ IEC/MODBUS glass)
CPU_LP (SPA/ IEC/ LON/MODBUS plastic)
CPU_LG (SPA/ IEC/ LON/MODBUS glass)
Power supply modules
1111
PS_87H (DItresh.=80 VDC)
PS_87L (DItresh.=18 VDC)
Display module
1111
2 x 16 character display
Digital inputs
9
High-speed power outputs
1
Power outputs (PO)
3
Signalling outputs (SO)
2
IRF outputs
1
Trip-circuit supervision (TCS)
1

ABB REX 521 Specifications

General

Brand	ABB
Model	REX 521
Category	Other
Language	English