ABB RELION REX640 Technical Manual

5.11.4 Operation principle
The function can be enabled and disabled with the Operation setting. The
corresponding parameter values are "on" and "off".
The operation of RESCPSCH can be described with a module diagram. All the
modules in the diagram are explained in the next sections.
CR_PRM
CR_INTER_TR
CS_PRM
CS_BLOCKING
CS_INTER_TR
DCUB
CRG
BLOCK
CSUR
CACC
CSOR
BLK_CS_OPR
CSBLK
OPERATE
DUTT
PUTT
POTT
DCB
CRL
LCG
OR
OR
CR_BLOCKING
Multiplexer
OR
AND
AND
Figure 710: Functional module diagram
The applied communication scheme logic in RESCPSCH is selected with the Scheme
type setting.
Table 1189: Communication scheme based on the Scheme type value
Scheme type value Communication scheme
"Intertrip" DUTT
"Permissive Underreach" PUTT
"Permissive Overreach" POTT
"Blocking" DCB
The unblocking scheme (DCUB) is enabled with the Unblock mode setting.
Protection related functions
1MRS759142 F
1252 REX640
Technical Manual

ABB RELION REX640 Specifications

General

Model	RELION REX640
Category	Protection Device
Communication Protocols	IEC 61850, Modbus, DNP3, IEC 60870-5-103
Display	LCD
Rated Voltage	100-240 V AC/DC
Rated Frequency	50/60 Hz
Protection Functions	Overcurrent, Earth Fault, Overvoltage, Undervoltage, Frequency
Mounting	Rack mounting
Inputs/Outputs	Analog inputs
Housing	Metal
Input Voltage	24-250 V DC / 100-240 V AC
Operating Temperature	-25°C to +70°C
Enclosure	IP20