Hitachi Relion 670 Series Commissioning Manual page 199

1MRK506371-UUS Rev. M
11.8 Multipurpose protection
11.8.1 Function revision history
Document
revision
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11.8.2 General current and voltage protection CVGAPC
Prepare the IED for verification of settings as outlined in section
for test" in this chapter.
One of the facilities within the general current and voltage protection function CVGAPC is that the value,
which is processed and used for evaluation in the function, can be chosen in many different ways by the
setting parameters CurrentInput and VoltageInput.
These setting parameters decide what kind of preprocessing the connected three-phase CT and VT
inputs shall be subjected to. That is, for example, single-phase quantities, phase-to-phase quantities,
positive sequence quantities, negative sequence quantities, maximum quantity from the three-phase
group, minimum quantity from the three-phase group, difference between maximum and minimum
quantities (unbalance) can be derived and then used in the function.
Due to the versatile possibilities of CVGAPC itself, but also the possibilities of logic combinations in the
application configuration of outputs from more than one CVGAPC function block, it is hardly possible to
define a fully covering general commissioning test.
11.8.2.1 Built-in overcurrent feature (non-directional)
Procedure
Line distance protection REL670
Commissioning manual
Product History
revision
2.2.1 -
2.2.1 -
2.2.2 -
2.2.3 -
2.2.3 -
2.2.4 -
2.2.4 -
2.2.4 -
2.2.5 • The harmonic restraint function changed to freeze the definite and IDMT timers.
• The maximum value of the settings IMin1 and IMin2 has been decreased to 1000.0 % of
IBase.
• Setting BlkLevel2nd was removed from the function.
• Previously called stepwise settings t_DefOCx and tResetDef_OCx had their names
changed to t_OCx and tReset_OCx for more clear understanding.
2.2.6 -
2.2.6 Minimum value changed to 0.01 for k_OC1 and k_OC2 settings
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Testing functionality by secondary injection
GUID-74F9B9A9-91EB-45BA-A883-6BA325C8B272 v2
"Requirements" and section
Section 11
SEMOD53552-1 v1
SEMOD56488-3 v4
"Preparing
SEMOD56488-9 v5
193