Directional Underpower Protection Guppdup; Verifying The Settings - Hitachi RET670 Commissioning Manual

1MRK 504 165-UEN Rev. K
11.5.13

Directional underpower protection GUPPDUP

Prepare the IED for verification of settings as outlined in section
section
11.5.13.1

Verifying the settings

The underpower protection shall be set to values according to the real set values to be used.
The test is made by means of injection of voltage and current where the amplitude of both current
and voltage and the phase angle between the voltage and current can be controlled. During the test,
the analog outputs of active and reactive power shall be monitored.
1. Connect the test set for injection of voltage and current corresponding to the mode to be used
in the application. If a three-phase test set is available this could be used for all the modes. If a
single-phase current/voltage test set is available the test set should be connected to a selected
input for one-phase current and voltage.
Table 38:
Set value: Mode
L1, L2, L3
Arone
PosSeq
L1L2
L2L3
L3L1
Table continues on next page
Transformer protection RET670
Commissioning manual
"Preparing for test" in this chapter.
Calculation modes
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Formula used for complex power calculation
* *
= × + ×
S U I U I
L 1 L 1 L 2 L 2
EQUATION1697 V1 EN-US
*
= × - ×
S U I U
L L 1 2 L 1 L L 2 3
EQUATION1698 V1 EN-US
*
= × ×
S 3 U I
PosSeq PosSeq
EQUATION1699 V1 EN-US
* *
= × -
S U ( I I )
L L 1 2 L 1 L 2
EQUATION1700 V1 EN-US
* *
= × -
S U ( I I )
L L 2 3 L 2 L 3
EQUATION1701 V1 EN-US
* *
= × -
S U ( I I )
L L 3 1 L 3 L 1
EQUATION1702 V1 EN-US
Testing functionality by secondary injection
"Requirements" and
*
+ ×
U I
L 3 L 3
*
I
L 3
Section 11
SEMOD175027-3 v5
SEMOD175027-7 v7
(Equation 84)
(Equation 85)
(Equation 86)
(Equation 87)
(Equation 88)
(Equation 89)
179