Verifying The Settings - Hitachi Relion 670 Series Commissioning Manual

Section 11
Testing functionality by secondary injection
Document
revision
H
J
K
11.4.17.2

Verifying the settings

Verifying settings by secondary injection
1. Connect the test set for three-phase current injection and three-phase voltage injection to the
appropriate IED terminals.
2. Go to Main menu /Settings /IED Settings /Current protection /VoltageRestOverCurr
( 51V,2(I>/U<))/VRPVOC (51V,2(I>/U<)):1 /General and make sure that the function is enabled,
that is, Operation is set to On.
3. The test of the function may be performed by injecting restrain voltage and increasing the
injected current(s). Note the value at which the START and STOC signals are set.
The set operate value in secondary amperes is calculated according to the following equations:
First part of the characteristic (Restrain voltage ≤ 25% of UBase):
StartCurr
IECEQUATION2432 V1 EN-US
Second part of the characteristic (25% of UBase ≤ Restrain voltage ≤ UHighLimit/100*UBase),
valid when setting parameter VDepMode = Slope:







 

IECEQUATION2433 V1 EN-US
Third part of the characteristic (UHighLimit/100*UBase ≤ Restrain voltage):
StartCurr
IECEQUATION2434 V1 EN-US
Example (rated secondary current = 1A):
CT ratio
VT ratio
StartCurr
VDepFact
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114
Product History
revision
2.2.4 -
2.2.4 -
2.2.5 Previously called settings Characterist and t_DefOC had their names changed to
Characteristic and t_OC for more clear understanding.
In the following equations, restrain voltage is the magnitude of the minimum phase-
to-phase voltage in secondary volts.
CT sec
IBase
× × ×
100
CTprim


StartCurr CT sec VDepFact
× ×  × −
IBase  1

100 CTprim  100
( )
−
UH i i ghLimit 25
VT sec
× ×
UBase
100 VTprim
CT sec
IBase
× ×
100
CTprim
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VDepFact
100




25
× − ×

Re strainVoltage U U Base

100
10 000/1A
10 kV/100 V
100%
25%
1MRK 511 403-UEN Rev. L
GUID-3A2B7FF5-330E-4A0D-AB74-EBAE6258C176 v1
GUID-39632D30-A8D8-417D-985C-8F886106783E v4


 
VT sec  StartCurr C C T sec
× + × ×
 
IBase

 
VTprim 100 CTprim
 

Commissioning manual
(Equation 15)

VDepFact
×


100
(Equation 16)
(Equation 17)
Bay control REC670