ABB Relion 670 Series Commissioning Manual page 125

1MRK 511 403-UEN E
VDepFact
UHighLimit
IBase
A test for each section of the characteristic of the function VRPVOC may be performed;
that may be achieved by applying the following voltages:
First section of the characteristic:
VDepMode = Slope , the minimum measured phase-to-phase voltage is lower than
If
0,25*
lower than
•
•
•
Second section of the characteristic only:
VDepMode = Slope , the minimum measured phase-to-phase voltage is between
If
0,25*
•
•
•
Last section of the characteristic:
VDepMode = either Slope or Step , the minimum measured phase-to-phase voltage is
If
higher than
•
•
•
4. Inject the voltages that are related to the first part of the characteristic, and then slowly
increase the phase current IL1 from 0.0 A up to the value the function operates. The
START and STOC signals must be activated when the amplitude of the phase current IL1
is slightly above 0.25 A on the secondary side. The corresponding trip signals TROC and
TRIP will be activated after the pre-set time delay has expired.
5. Decrease the current IL1 slowly and note the reset value.
6. Repeat steps 4 and 5 applying voltages that are related to the second and the last
section of the characteristic; the function operates when IL1 is slightly higher than: 0.5 A
in the second section; 1A in the last section.
7. Connect the trip output contact to the input channel of the test set in order to stop the
injection and measure the trip time.
8. If definite time delay is used for the overcurrent step, set the setting
Def. Time . Apply the voltages related to the last part of the characteristic and inject a
current IL1 200% higher than the set operation level, and check the definite time delay for
trip (the signals TROC and TRIP of the protection function VRPVOC are active in trip
condition).
9. If inverse time delay is used for the overcurrent step, the parameter setting
shall be properly set; we can refer, for example, to the setting
inverse time characteristic is selected, the trip signals TROC and TRIP will operate after a
time defined by the equation:
[ ]
t s
IECEQUATION2435 V1 EN-US
Bay control REC670
Commissioning manual
UBase ; if VDepMode = Step , the minimum measured phase-to-phase voltage is
UHighLimit /100* UBase :
UL1: Ampl = 10 / √3; Angle = 0°
UL2: Ampl = 10 / √3; Angle = 240°
UL3: Ampl = 100 / √3; Angle = 120°
UBase and UHighLimit /100* UBase :
UL1: Ampl = 50 / √3; Angle = 0°
UL2: Ampl = 50 / √3; Angle = 240°
UL3: Ampl = 100 / √3; Angle = 120°
UHighLimit /100* UBase :
UL1: Ampl = 105/ √3; Angle = 0°
UL2: Ampl = 105/ √3; Angle = 240°
UL3: Ampl = 105 / √3; Angle = 120°
13 5 . * k
=
 
I
 −
1

 
StartCurr
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Testing functionality by secondary injection
25%
100%
10 000 A
10 kV
Characterist = IEC
IEC Very inv. ; If the IEC Very
Section 11
Characterist
(Equation 18)
119