Hardware Versions - ABB REX 521 Technical Reference Manual, General

REX 521
2.3.
12
Protection Relay
Technical Reference Manual, General

Hardware versions

Table 2.3.-1 Hardware versions of REX 521
Relay type
Version name
Transformer modules (MIM)
Transformers
• Current transformers 1/5 A
• Current transformers 0.2/1 A
• Voltage transformers 100 V
Sensor channels
• Current sensor inputs
• Voltage sensor inputs
Main CPU modules
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
PS_87H (DItresh.=80 VDC)
PS_87L (DItresh.=18 VDC)
Display module
2 x 16 character display
Digital inputs
High-speed power outputs
Power outputs (PO)
Signalling outputs (SO)
IRF outputs
Trip-circuit supervision (TCS)
1MRS 751108-MUM
REX 521
Basic Medium High
1 1 1
4 4 4
1 1
1 4
1 1 1
1 1 1
1 1 1
9
1
3
2
1
1
Sensor
1
1
1
1
3
3
1
1
1