Settings; Monitored Data; Operation Principle; Technical Data - ABB RET650 Technical Manual

Section 8
Current protection
8.1.5
Table 68: PHPIOC Group settings (basic)
Name
Operation
IP>>
Table 69: PHPIOC Non group settings (basic)
Name
GlobalBaseSel
8.1.6
8.1.7
8.1.8
142

Settings

Values (Range) Unit
Off -
On
5 - 2500 %IB
Values (Range) Unit
1 - 6 -

Monitored data

Table 70: PHPIOC Monitored data
Name
IL1
IL2
IL3

Operation principle

The sampled analogue 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. In a comparator the RMS values are compared to the set
operation current value of the function (IP>>). 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 can be blocked from the binary input BLOCK.

Technical data

Table 71: PHPIOC technical data
Function
Operate current
Reset ratio
Operate time
Table continues on next page
Step Default
- Off
1 200
Step Default
1 1
Type Values (Range)
REAL -
REAL -
REAL -
Range or value
(5-2500)% of lBase
> 95%
20 ms typically at 0 to 2 x I
1MRK 504 135-UEN A
Description
Operation Off / On
Operate phase current level in % of IBase
Description
Selection of one of the Global Base Value
groups
Unit Description
A Current in phase L1
A Current in phase L2
A Current in phase L3
Accuracy
± 1.0% of I at I £ I
r r
± 1.0% of I at I > I
r
-
-
set
Technical manual