ABB ret650 - Page 88

Name Values (Range) Unit Step Default Description
IdUnre 1.00 - 50.00 IB 0.01 10.00 Unrestrained protection limit, multiple of
W1 rated current
I2/I1Ratio 5.0 - 100.0 % 0.1 15.0 Maximum ratio of 2nd harmonic to
fundamental harmonic differential current
I5/I1Ratio 5.0 - 100.0 % 0.1 25.0 Maximum ratio of 5th harmonic to
fundamental harmonic differential current
CrossBlockEn Off
On
- - On Operation Off/On for cross-block logic
between phases
NegSeqDiffEn Off
On
- - On Operation Off/On for negative sequence
differential protections
IMinNegSeq 0.02 - 0.20 IB 0.01 0.04 Minimum negative sequence current
NegSeqROA 30.0 - 90.0 Deg 0.1 60.0 Operate angle for internal/external
negative sequence fault discriminator
SOTFMode Off
On
- - On Operation mode for switch onto fault
IDiffAlarm 0.05 - 1.00 IB 0.01 0.20 Differential curreent alarm, multiple of
base current, usually W1 current
tAlarmDelay 0.000 - 60.000 s 0.001 10.000 Time delay for differential current alarm
Table 27: T2WPDIF Non group settings (basic)
Name
Values (Range) Unit Step Default Description
GlobalBaseSelW1 1 - 6 - 1 1 Selection of one of the Global Base Value
groups, winding 1
GlobalBaseSelW2 1 - 6 - 1 1 Selection of one of the Global Base Value
groups, winding 2
ConnectTypeW1 WYE (Y)
Delta (D)
- - WYE (Y) Connection type of winding 1: Y-wye or D-
delta
ConnectTypeW2 WYE (Y)
Delta (D)
- - WYE (Y) Connection type of winding 2: Y-wye or D-
delta
ClockNumberW2 0 [0 deg]
1 [30 deg lag]
2 [60 deg lag]
3 [90 deg lag]
4 [120 deg lag]
5 [150 deg lag]
6 [180 deg]
7 [150 deg lead]
8 [120 deg lead]
9 [90 deg lead]
10 [60 deg lead]
11 [30 deg lead]
- - 0 [0 deg] Phase displacement between W2 &
W1=HV winding, hour notation
ZSCurrSubtrW1 Off
On
- - On Enable zero sequence subtration for W1
side, Off/On
ZSCurrSubtrW2 Off
On
- - On Enable zero sequence subtration for W2
side, Off/On
Section 6 1MRK 504 135-UEN A
Differential protection
82
Technical manual