ABB REQ650 User Manual

2.3.4 Line bay in a solidly earthed network, connected to double
busbar switchyard
3
3
1
REQ650 (A01)/(B11)
1
Bus 1
Bus 2
Line/Feeder
IEC10000136-1-en.vsd
IEC10000136 V1 EN
Figure 7: Line bay in a solidly earthed network
REQ650 has a number of back-up protection functions. In addition to this, three-phase
trip and autoreclosing is available for REQ650 A01 and single-phase trip and
autoreclosing is available for REQ650 B11.
Section 2 1MRK 505 291-UEN A
Application
34
Application manual

ABB REQ650 Specifications

General

Type	Protection Relay
Product ID	REQ650
Rated Frequency	50/60 Hz
Display	LCD
Mounting	Panel Mount
Communication Protocols	IEC 61850, Modbus
Protection Functions	Overcurrent, Earth Fault
Operating Temperature Range	-25 to +55 °C
Power Supply	24-250 V DC / 48-265 V AC