ABB REX640 User Manual

Protection functions
Table 35. Distance protection (DSTPDIS)
Characteristic Value
Operation accuracy At the frequency f = f
n
Current:
±1.5% of the set value or ±0.002 × I
n
Voltage:
±1.5% of the set value or ±0.002 × U
n
Impedance:
±2.5% of the set value or ±0.05 Ω
Phase angle: ±2°
Shortest operate time
1)
SIR
2)
: 0.1...50
25 ms
Transient overreach SIR = 0.1...50 <8.5%
Reset time Typically 45 ms
Reset ratio Typically 0.96/1.04
Operate time accuracy ±1.0% of the set value or ±20 ms
1) Measured with static power output (SPO)
2) SIR = Source impedance ratio
1MRS759144 A
REX640
Product version: 1
ABB 37

ABB REX640 Specifications

General

Device Type	Protection Relay
Communication Protocols	IEC 61850, Modbus, DNP3, IEC 60870-5-103
Rated Frequency	50/60 Hz
Operating Temperature Range	-25°C to +55°C
Display	LCD
Housing	Metal
Manufacturer	ABB
Model	REX640
Mounting	Rack mounting
Inputs and Outputs	Configurable binary inputs and outputs
Rated Voltage	48-240 V AC/DC
Protection Functions	Overcurrent, Earth Fault
Input Voltage	48-240 V AC/DC
Certifications	CE, UL, IEC