ABB RET670 Installation And Commissioning Manual

-3U
0
8080
Operate area
3I
0
e
n06000652.vsd
RCADir = 0º
ROADir = 80º
IEC06000652 V2 EN
Figure 62: Example characteristic
Non-directional earth fault current protection
Procedure
1. Measure that the operate current is equal to the INNonDir> setting.
The function activates the START and STDIRIN output.
2. Measure the operate time of the timer by injecting a current to get two times
the set INNonDir> operate value.
3. Compare the result with the expected value.
The expected value depends on whether definite time tINNonDir or inverse
time was selected.
4. Continue to test another function or complete the test by setting the test mode
to Off.
Residual overvoltage release and protection
Procedure
1. Measure that the operate voltage is equal to the UN> setting.
The function activates the START and STUN signals.
2. Measure the operate time by injecting a voltage 1.2 timers set UN> operate
value.
3. Compare the result with the set tUN operate value.
4. Inject a voltage 0.8 · UNRel> and a current high enough to operate the
directional function at the chosen angle.
5. Increase the voltage until the directional function is released.
6. Compare the measured value with the set UNRel> operate value.
Section 13 1MRK 504 088-UEN C
Verifying settings by secondary injection
144
Installation and commissioning manual

ABB RET670 Specifications

General

Rated Frequency	50/60 Hz
Inputs	Analog and binary inputs
Application	Protection of power systems
Communication Protocols	IEC 61850, DNP3, Modbus
Operating Temperature Range	-25°C to +55°C
Mounting	Rack mounted
Number of Binary Inputs	Up to 48
Number of Binary Outputs	32
Protection Functions	Overcurrent Protection
Outputs	Binary outputs
Enclosure	IP 54
Type	Line Differential Protection
Number of Analog Inputs	24