PROTECT ION TR I P UNI TS
3/25
Ekip G DIP LS/I ABB code Protection Function Threshold
Trip Time
Trip Curve
L S
Overload
I1 = 0.4...1 x In with steps of 0.04
t1 at 3 x I1 = 3 - 6s
t=k/I 2
Selective short-circuit I2 = Off – 1 – 1.5 – 2 – 2.5 – 3 – 3.5 – 4.5 - 5.5 – 6.5 – 7 – 7.5 – 8 – 8.5 – 9 – 10 x In
t2 = 0.05 - 0.075 - 0.1 - 0.2 at 10 x In when t = k/I2
t=k t = k or t = k /I 2 for XT7
I
Short-circuit
I3 = Off – 1 – 1.5 – 2 – 2.5 – 3 – 3.5 – 4.5 - 5.5 – 6.5 – 7 – 7.5 – 8 – 8.5 – 9 – 10 x In
t3 ≤ 20ms t3 ≤ 30ms for XT7
t=k
Tolerances in case of: • Self-powered trip unit at full power • 2 or 3 phase supply Trip Unit Protection
Trip Threshold
Trip Time
Ekip DIP LS/I Ekip DIP LIG Ekip G Dip LS/I
L
trip between 1.05...1.3 x I1
±10% up to 4xIn ±20% from 4xIn
S
±10%
XT2-XT4-XT5-XT6: 15% (2) XT7: t=k: ±10% t=k/I2: ±15% up to 4xIn ±20% from 4xIn
I
±10% ±10%
-
XT2-XT4-XT5-XT6: ±20% XT7: ±15%
G (1)
Ekip DIP LSI Ekip DIP LSIG
L
trip between 1.05…1.3 x I1
XT2-XT4-XT5-XT6: ±10% up to 4xIn ±20% from 4xIn XT7: ±10% up to 6xIn ±20% from 6xIn
S
±10%
XT2-XT4-XT5-XT6: t=k: ±10% up to 4xIn ±20% up to 4xIn t=k/I2: ±15% t2 >100ms ±20ms t2 ≤100ms XT7: t=k the better of the two data: ±10% or ± 40ms t=k/I2: ±15% up to 6xIn ±20% from 6xIn
I
±10%
-
XT2-XT4-XT5-XT6: ±10% XT7: ±7%
XT2-XT4-XT5-XT6: ±15% XT7: t=k the better of the two data: ±10% or ± 40ms t=k/I2: ±15% up to 6xIn ±20% from 6xIn
G (1)
Ekip M Dip I and Ekip M Dip LIU
L
trip between 1.05…1.2xI1
±10% up to 4xIn ±20% up to 4xIn
I
±10% ±10%
-
U
±10%
(1) G protection is inhibited for currents higher than 4xIn with XT2, XT4, XT5 and XT6 (2) for G Dip LS/I: - ±10% t2 > 100ms - ±20% t2 ≤ 100ms
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