ABB Relion 650 Series Technical Manual page 156

Section 6
Current protection
6.1.5 Settings
Table 61: PHPIOC (50) Group settings (basic)
Name Values (Range)
Operation Disabled
Enabled
Pickup 5 - 2500
Table 62: PHPIOC (50) Non group settings (basic)
Name Values (Range)
GlobalBaseSel 1 - 6
6.1.6 Monitored data
Table 63: PHPIOC (50) Monitored data
Name
I_A
I_B
I_C
6.1.7 Operation principle
The sampled analog phase currents are pre-processed in a discrete Fourier filter (DFT) block. The
RMS value of each phase current is derived from the fundamental frequency components, as well
as sampled values of each phase current. These phase current values are fed to the instantaneous
phase overcurrent protection function PHPIOC (50). In a comparator the RMS values are compared
to the set operation current value of the function
operation current a signal from the comparator for this phase is set to true. This signal will,
without delay, activate the TRIP signal that is common for all three phases.
PHPIOC (50) can be blocked from the binary input BLOCK.
150
Unit Step
- -
%IB 1
Unit Step
- 1
Type Values (Range)
REAL -
REAL -
REAL -
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Default Description
Disabled Disable/Enable Operation
200 Phase current pickup in % of IBase
Default Description
1 Selection of one of the Global Base Value
groups
Unit Description
A Current in phase A
A Current in phase B
A Current in phase C
Pickup . If a phase current is larger than the set
1MRK 506 326-UUS B
PID-1097-SETTINGS v5
PID-1097-MONITOREDDATA v7
M12913-3 v4
Line distance protection REL650
Technical manual