ABB RET670 Commissioning Manual

4. Also, reduce further the pressure level input below PresLOLimit or activate the
binary input signal SENPRESLO, check that PRESLO signal appears after a set time
delay of tPressureLO.
5. Activate BLOCK binary input and check that the outputs PRESALM, PRESLO,
ALARM and LOCKOUT disappear.
6. Reset the BLOCK binary input.
7. Make sure that pressure lockout condition exists and then activate the reset lock out
input RESETLO and check that the outputs PRESLO and LOCKOUT reset.
11.13.1.2 Testing the gas medium supervision for temperature alarm and
temperature lock out conditions
1. Consider the analogue temperature input SENTEMP and set SENTEMP to a value
higher than TempAlarmLimit, check that outputs TEMPALM and ALARM are
activated after a set time delay of tTempAlarm.
2. Temperature lockout input SETTLO can be used to set TEMPLO signal.
3. Also, increase further the temperature input above TempLOLimit, check that the
outputs TEMPLO and LOCKOUT appears after a set time delay of tTempLockOut.
4. Activate BLOCK binary input and check that the outputs TEMPALM, TEMPLO,
ALARM and LOCKOUT disappear.
5. Reset the BLOCK binary input.
6. Make sure that temperature lockout condition exists and then activate the reset lock
out input RESETLO and check that the outputs TEMPLO and LOCKOUT reset.
11.13.1.3 Completing the test
Continue to test another function or end the test by changing the TestMode setting to Off.
Restore connections and settings to their original values, if they were changed for testing
purposes.
11.13.2 Liquid medium supervision SSIML
Prepare the IED for verification of settings as outlined in section
"Completing the test" in
this chapter.
Values of logical signals for SSIMG protection are available on the local HMI under Main
menu/Tests/Function status/Monitoring/InsulationLiquid(71)/SSIML(71):x, where
x = 1, 2,....4.
Check that the input logical signal BLOCK is logical zero and that on the local HMI, the
logical signals LVLALM, LVLLO, TEMPALM, TEMPLO, ALARM and LOCKOUT are logical
zero.
Section 11 1MRK 504 165-UUS -
Testing functionality by secondary injection
274 Transformer protection RET670 2.2 ANSI
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