Settings - ABB REL650 series Technical Manual

1MRK 506 335-UUS A
7.8.5
Table 117: UC2PTUC (37) Group settings (basic)
Name Values (Range)
Operation Disabled
Enabled
I1Mode 1 out of 3
2 out of 3
3 out of 3
I1< 5.0 - 100.0
t1 0.000 - 60.000
tReset1 0.000 - 60.000
I2Mode 1 out of 3
2 out of 3
3 out of 3
I2< 5.0 - 100.0
t2 0.000 - 60.000
tReset2 0.000 - 60.000
tPulse 0.01 - 2.00
IBlk 5.0 - 100.0
Table 118: UC2PTUC (37) Non group settings (basic)
Name Values (Range)
GlobalBaseSelector 1 - 6
7.8.6
Technical manual

Settings

Unit Step
- -
- -
%IB 1.0
s 0.001
s 0.001
- -
%IB 1.0
s 0.001
s 0.001
s 0.01
%IB 1.0
Unit Step
- 1
Operation principle
Time delayed 2-step undercurrent protection (UC2PTUC, 37) function generates output
signals PICKUP and TRIP. The 2-steps in the function are identical, hence, only step1 is
explained below.
UC2PTUC (37) function compares the magnitude of the measured current with a set
current level, I1<. The undercurrent function operates and generates output signals,
PICKUP and PU_ST1, when the magnitude of the measured current is smaller than the set
current level I1<.
The low current condition also starts a definite time delay, t1. The current measuring
condition is based on a selected number of phases involved for operation according to
setting parameter, I1Mode. When the low current condition continues for longer time than
the set time t1, the UC2PTUC (37) function generates trip signals, TRIP and TRST1. The
Default Description
Disabled Operation Disable / Enable
1 out of 3 Number of phases required to operate for step
1
10.0 Current setting for step 1 in % of IBase
5.000 Time delay for step 1
0.000 Reset time delay for step 1
1 out of 3 Number of phases required to operate for step
2
30.0 Current setting for step 2 in % of IBase
2.000 Time delay for step 2
0.000 Reset time delay for step 2
0.10 Operate pulse duration
5.0 Current setting for blocking in % of IBase
Default Description
1 Selection of one of the Global Base Value
groups
Section 7
Current protection
247