Settings - ABB REC650 ANSI Technical Manual

Section 6
Current protection
6.1.5
Table 26: PHPIOC (50) Group settings (basic)
Name Values (Range)
Operation Disabled
Enabled
Pickup 5 - 2500
Table 27: PHPIOC (50) Non group settings (basic)
Name Values (Range)
GlobalBaseSel 1 - 6
6.1.6
6.1.7
84
Table 25: PHPIOC (50) Output signals
Name Type
TRIP BOOLEAN

Settings

Unit Step
- -
%IB 1
Unit Step
- 1
Monitored data
Table 28: PHPIOC (50) Monitored data
Name Type
I_A REAL
I_B REAL
I_C REAL
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 3-phase output function
PHPIOC (50). In a comparator the RMS values are compared to the set operation current
value of the function Pickup. If a phase current is larger than the set 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.
Description
Common trip signal
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
Values (Range) Unit
- A
- A
- A
1MRK 511 287-UUS A
Description
Current in phase A
Current in phase B
Current in phase C
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