155
Scheme communication
Chapter 11
Verifying settings by secondary
injection
12.5.2
Testing the weak-end-infeed logic
If setting parameter WEI=Echo
Procedure
1.
Inject the polarizing voltage 3U0 to 5% of UBase and the phase angle
between voltage and current to 155
°
, the current leading the voltage.
2.
Inject current (155
°
leading the voltage) in one phase to about 110%
of the setting operating current (IN>Dir).
3.
Activate the CRL binary input.
No ECHO and CS should appear.
4.
Abruptly reverse the current to 65
°
lagging the voltage, to operate
the forward directional element.
No ECHO and CS should appear.
5.
Switch off the current and check that the ECHO and CS appears on
the corresponding binary output or on the local HMI unit, about 200
ms after resetting the directional element.
6.
Switch off the CRL binary input.
7.
Activate the BLOCK binary input.
8.
Activate the CRL binary input.
No ECHO and CS should appear.
9.
Switch off the polarizing voltage and reset the BLOCK and CRL bina-
ry input.
If setting WEI=Trip
Procedure
1.
Inject the polarizing voltage 3U0 to about 90% of the setting (3UO)
operating voltage.
2.
Activate the CRL binary input.
No ECHO, CS and TRWEI outputs should appear.
3.
Increase the injected voltage to about 110% of the setting (3UO) op-
erating voltage.
4.
Activate the CRL binary input.
5.
Check that the ECHO, CS and TRWEI appears on the corresponding
binary output or on the local HMI.
6.
Reset the CRL binary input.
7.
Activate the BLOCK binary input.
Содержание RELION REL670
Страница 8: ...Contents ...
Страница 54: ...46 Checking the optical connections Chapter 6 Checking the external optical and electrical connections ...
Страница 72: ...64 About this chapter Chapter 9 Establishing connection and verifying the LON communication ...
Страница 78: ...70 Downloading settings and configuration from a PC Chapter 10 Configuring the IED and changing settings ...
Страница 174: ...166 Remote communication Chapter 11 Verifying settings by secondary injection ...
Страница 190: ...182 Maintenance Chapter 13 Fault tracing and repair ...
Страница 198: ...190 Glossary Chapter 14 Glossary ...