Do not switch off the auxiliary power supply to the IED before
changes, for example, setting parameter or local/remote control state
changes are saved.
A mechanism for limiting the number of writings per time period is included in the
IED to prevent the flash memory to be worn out due to too many writings. As a
consequence it may take up to an hour to save changes. If the auxiliary power is
interrupted before a change is saved, that change is lost.
5.2
Activating test mode
Put the IED into the test mode before testing. The test mode blocks all protection
functions and some of the control functions in the IED, and the individual functions to
be tested can be unblocked to prevent unwanted operation caused by other functions. In
this way, it is possible to test slower back-up measuring functions without the
interference from faster measuring functions. Test mode is indicated when the yellow
PickupLED flashes.
Procedure
1.
Select
Main menu/Tests/IED test mode/1:TESTMODE
2.
Set parameter
TestMode
to
Enabled
.
3.
Save the changes.
As a consequence, the yellow pickupLED starts flashing as a reminder and
remains flashing until the test mode is switched off.
5.3
Preparing the connection to the test equipment
The IED can be equipped with a test switch of type RTXP8, RTXP18 or RTXP24 or
FT. The test switch and its associated test plug handles are a part of the COMBITEST
or FT system of ABB, which provides secure and convenient testing of the IED.
When using the COMBITEST, preparations for testing are automatically carried out in
the proper sequence, that is, for example, blocking of tripping circuits, short circuiting
of CT’s, opening of voltage circuits, making IED terminals available for secondary
injection. Terminals 1 and 8, 1 and 18 as well as 1 and 12 of the test switches RTXP8,
RTXP18 and RTXP24 respectively are not disconnected as they supply DC power to
the protection IED. When FT switch is used for testing, care shall be exercised to open
the tripping circuit, ahead of manipulating the CT fingers.
1MRK 506 331-UUS A
Section 5
Testing IED operation
39
Commissioning Manual
Содержание Relion 650 Series REL650
Страница 1: ...Relion 650 series Line distance protection REL650 ANSI Commissioning Manual ...
Страница 2: ......
Страница 8: ......
Страница 22: ...14 ...
Страница 44: ...36 ...
Страница 52: ...44 ...
Страница 156: ...148 ...
Страница 166: ...158 ...
Страница 175: ...167 ...