ABB RET670 Commissioning Manual

11.4.10.4 Completing the test
Continue to test another function or end the test by changing the TESTMODE setting to
Disabled. Restore connections and settings to their original values, if they were changed
for testing purposes.
11.4.11 Pole slip protection PSPPPAM (78)
Prepare the IED for verification of settings as outlined in section
"Requirements" and
section "Preparing for test" in this chapter.
11.4.11.1 Verifying the settings
It is assumed that setting of the pole slip protection function PSPPPAM (78) is done
according to impedances as seen in figure 38 and figure 39.
The test is done by means of injection of three-phase current and three-phase voltage from
a modern test device. This test device shall be able to give voltage and current with the
possibility to change voltage and current amplitude and the angle between the injected
voltage and current. The parameter setting shall be according to the real application
chosen values.
Procedure
1. Feed the IED with current and voltage corresponding to a normal operation point
Injected voltage V equal to base voltage (VBase) and the injected current I equal to
half the base current (IBase). The angle between the voltage and current shall be 0°.
2. With maintained amplitude of the injected voltage the current amplitude and angle
is changed to a value ZC/2.
This is done with a speed so that the final impedance is reached after 1 second. As
the injected voltage is higher than 0.92 VBase no PICKUP signal should be
activated.
3. With reduced amplitude of the injected voltage to 0.8 VBase the current amplitude
and angle is changed to a value ZC/2.
This is done with a speed so that the final impedance is reached after 1 second. As
the injected voltage is lower than 0.92 VBase the PICKUP signal should be
activated.
4. With reduced amplitude of the injected voltage to 0.8 VBase the current amplitude
and angle is changed via ZC/2 to a value corresponding to half IBase and 180°
between the injected current and voltage.
This is done with a speed so that the final impedance is reached after 1 second. As
the injected voltage is lower than 0.92 VBase the PICKUP signal should be
activated. In addition to this the signal ZONE1 should be activated.
5. Set N1Limit to 1 and repeat step
4.
Section 11 1MRK 504 165-UUS -
Testing functionality by secondary injection
148 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