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ABB all products Example of curve reading

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Example of curve reading
t [s]
x I
1
10
10
10
10
2
1
10
10
2
10
3
10
4
1
10
152.7 s
40.2 s
6.9 s
3 x I
1
Example 1 – XT3N 225
Trip curves for distribution (thermal magnetic trip unit)
Let us consider an XT3N TMF In = 225A circuit-breaker. According to the conditions the overload is found in; i.e., with the circuit-breaker at thermal regime or not, thermal protection tripping varies considerably. For example, for an overload current 3xI1, the trip time is between 152,7s and 40,2s for cold tripping and between 40,2s and 6,9s for hot tripping.
4
For fault current values higher than 225A. Tthe circuit-breaker trips with the instantaneous magnetic protection I3.
Example 2 – XT2H 125
Specific let-through energy curves
This figure figure shows a sample graph of the specific let­through energy of the XT2H 125 circuit-breaker at a voltage of 220/230V. The prospective symmetrical short-circuit current is indicated on the abscissas, whereas the values of the specific let-through
2
energy expressed in A The circuit-breaker lets through a value of I 10^6 · A
2
s relative to a short-circuit current of 14kA.
s are shown on the ordinates.
2
t equal to 0, 42 ·
I2t [106 A2s]
10
1
-1
10
-2
10
1
14 kA
10
2
10
3
10
x I
[kA]
rms
4/2 SACE Tmax XT UL/CSA | US Technical Catalog
Ip [kA]
x I
rms
[kA]
10
10
1
1
10
2
10
3
10
2
10
3
18 kA
Example 3 – XT2L 125
Limitation curves
The figure at right gives the trend of the Limitation curves of the XT2L 125 In = 125A circuit-breaker. The effective value of the prospective symmetrical short-circuit current is given on the abscissas of the diagram, whereas the peak value corresponding to the prospective short-circuit current is indicated on the ordinates. For a value current of 22kA, the XT2L 125 circuit breaker with a thermal magnetic trip unit In = 125A limits the peak prospective short-current current to 18kA at a voltage of 600V.
4
US Technical Catalog | SACE Tmax XT UL/CSA 4/3
1
1
1
1
Trip curves with thermal magnetic trip unit
Trip curves for distribution
XT1 125 TMF In=15..30A
t [s]
4
10
3
10
2
10
4
10
1
-1
10
-2
10
-1
10
XT1 125 TMF In=35...50A
t [s]
4
10
3
1SDC21017EF0001_A
In=15A
In=20A
In=25A
In=30A
1
10
2
10 x I
10
2
10
1SDC21017EF0001_B
10
1
-1
10
-2
10
-1
10
1
In=35A
In=40A
In=45A
In=50A
10
2
10
x I
XT1 125 TMF In=60...100A
t [s]
4
10
3
10
2
10
10
1
-1
10
-2
10
-1
10
1
I3=10xIn
XT1 125 TMF In=125A
t [s]
4
10
3
1SDC21017EF0001_C
10
2
10
10
1
-1
10
-2
10
2
10 x I
10
-1
10
1
I3=10xIn
10
1SDC21017EF0001_D
2
10
x I
4/4 SACE Tmax XT UL/CSA | US Technical Catalog
XT2 125 TMF In=15...30A
1
1
1
1
t [s]
4
10
XT2 125 TMF In=35...50A
t [s]
4
10
3
10
2
10
1SDC21018EF0001_A
10
1
-1
10
-2
10
-1
10
1
In=15A
In=20A
In=25A
In=30A
10
2
10 x I
3
10
2
10
10
1SDC21018EF0001_B
4
1
-1
10
-2
10
-1
10
1
In=35A
In=40/50A
10
2
10 x I
XT2 125 TMF In=60...70A
t [s]
4
10
3
10
2
10
10
1
-1
10
-2
10
-1
10
1
I3=10xIn
XT2 125 TMA In=80...100A
t [s]
4
10
3
1SDC21018EF0001_C
10
2
10
10
1
-1
10
-2
10
2
10 x I
10
-1
10
1
I3=5...10xIn
10
1SDC21018EF0001_D
2
10 x I
US Technical Catalog | SACE Tmax XT UL/CSA 4/5
1
1
Trip curves with thermal magnetic trip unit
Trip curves for distribution
XT2 125 TMA In=110...125A
t [s]
4
10
3
10
2
10
4
10
1
-1
10
-2
10
-1
10
1
I3=5...10xIn
XT3 225 TMF In=60..100A
t [s]
4
10
3
1SDC21018EF0001_E
10
2
10 x I
10
2
10
1SDC21020EF0001_A
10
1
-1
10
-2
10
-1
10
I3=10xIn
1
10
2
10 x I
XT3 250 TMF In=110..150A
t [s]
4
10
3
10
2
10
10
1
-1
10
-2
10
-1
10
1
I3=10xIn
XT3 250 TMF In=160..225A
t [s]
4
10
3
1SDC21018EF0001_B
10
2
10 x I
1
10
2
10
1SDC21020EF0001_C
10
1
-1
10
-2
10
-1
10
I3=10xIn
1
10
2
10 x I
1
4/6 SACE Tmax XT UL/CSA | US Technical Catalog
x I
1
XT4 250 TMF In=25...50A
x I
1
x I
1
x I
1
XT4 250 TMF In=60...70A
t [s]
4
10
3
10
2
10
1SDC21021EF0001_A
10
1
In=25A
-1
10
-2
10
-1
10
1
In=30A
In=35A
In=40...50A
10
2
10
t [s]
4
10
3
10
2
10
10
1SDC21021EF0001_B
4
1
-1
10
-2
10
-1
10
1
I3=10xIn
10
2
10
XT4 250 TMF In=80...100A
t [s]
4
10
3
10
2
10
10
1
-1
10
-2
10
-1
10
1
I3=10xIn
XT4 250 TMF In=110...150A
t [s]
4
10
3
1SDC21021EF0001_C
10
2
10
10
2
10
1SDC21021EF0001_C
10
1
-1
10
-2
10
-1
10
1
I3=10xIn
10
2
10
US Technical Catalog | SACE Tmax XT UL/CSA 4/7
t [s]
x I
1
t [s]
x I
1
x I
1
x I
1
Trip curves with thermal magnetic trip unit
Trip curves for distribution
XT4 250 TMF In=160...225A
4
10
3
10
2
10
4
10
1
-1
10
-2
10
-1
10
XT4 250 TMF In=250A
4
10
3
1SDC21021EF0001_E
10
2
10
10
1
-1
I3=10xIn
1
10
2
10
10
I3=10xIn
-2
10
-1
10
1
10
1SDC21021EF0001_F
2
10
XT4 250 TMA In=80...100A
t [s]
4
10
3
10
2
10
10
1
-1
10
-2
10
-1
10
1
I3=5...10xIn
XT4 250 TMA In=110...150A
t [s]
4
10
3
1SDC21021EF0001_G
10
2
10
10
1
-1
10
-2
10
2
10
10
-1
10
1
I3=5...10xIn
10
1SDC21021EF0001_H
2
10
4/8 SACE Tmax XT UL/CSA | US Technical Catalog
t [s]
x I
1
XT4 250 TMA In=160...225A
t [s]
x I
1
XT4 250 TMA In=250A
4
10
3
10
2
10
1SDC21021EF0001_I
4
10
3
10
2
10
1SDC21021EF0001_L
4
10
1
-1
10
-2
10
-1
10
1
I3=5...10xIn
10
2
10
10
1
-1
10
-2
10
-1
10
1
I3=5...10xIn
10
2
10
US Technical Catalog | SACE Tmax XT UL/CSA 4/9
x I
1
x I
1
x I
1
x I
1
Trip curves with thermal magnetic trip unit
Trip curves for distribution
XT1 125 MA In=3...125A
t [s]
4
10
3
10
2
10
4
10
1
-1
10
-2
10
-1
10
I3=3...11xIn (In=15...125A)
I3=4...11xIn (In=3...7A)
1
Overload limit
10
1SDC21022EF0001_A
2
10
XT2 125 MA In=125A
t [s]
4
10
3
10
2
10
10
1
I3=4...11xIn
-1
10
-2
10
-1
10
(In=125A)
1SDC21022EF0001_B
Overload limit
1
10
2
10
XT3 225 MA In=100...200A
t [s]
4
10
3
10
2
10
10
1
I3=3...12xIn
-1
10
-2
10
-1
10
(In=100...200A)
1
Overload limit
10
1SDC21022EF0001_C
2
10
XT4 250 MA 80...250A
t [s]
4
10
3
10
2
10
10
1
-1
10
-2
10
-1
10
1
I3=5...10xIn (In=80...250A)
Overload limit
10
1SDC21022EF0001_D
2
10
4/10 SACE Tmax XT UL/CSA | US Technical Catalog
Trip curves with electronic trip unit
Trip curves for distribution
XT2 Ekip LS/I L-I functions
t [s]
4
10
3
10
2
10
10
1
-1
10
-2
10
-3
10
-1
10
XT2 Ekip LS/I L-S functions
t [s]
4
0.4...1
1
0.4
1SDC21011GF0001
1
1...10
10
10
3
10
2
10
0.4...1
1
0.4
1 10
1SDC21012GF0001
1...10
4
10
2
10
-1
1
x In
10
10
10
1
I [kA]
1
-1
10
-2
10
-3
10
-1
10
1
x In I [kA]
-1
10
10
2
10
10
1
XT2 Ekip I I function
t [s]
4
10
3
10
2
10
10
1
-1
10
-2
10
-3
10
-1
10
XT2 Ekip LSI L-S-I functions
t [s]
4
10
1
10
1SDC21013GF0001
3
10
Overload limit
2
10
10
2
10
-1
1
10
10
x In I [kA]
10
1
1
-1
10
-2
10
-3
10
-1
10
0.4
I2t ON
I2t OFF
0.4...1
1
1SDC21014GF0001
1
1
1
1...10
10
10
10
-1
10
x In I [kA]
1
10
2
10
US Technical Catalog | SACE Tmax XT UL/CSA 4/11
t [s]
10
10
-1
10
-2
10
-3
1
10
10
2
10
3
10
4
1
10
-1
10
2
1
0.2
0.2...1
Trip curves with electronic trip unit
Trip curves for distribution
XT2 Ekip LSIG L-S-I functions
t [s]
4
10
3
10
2
10
4
10
1
-1
10
-2
10
-3
10
-1
10
0.4
I2t ON
I2t OFF
0.4...1
XT2 Ekip LSIG G function
1
1SDC21015GF0001
1
1
1...10
1...10
10
10
2
10
Inhibited for I>2 In
-1
1
10
10
x In I [kA]
10
1
1SDC21016GF0001
XT4 Ekip LS/I L-I functions
t [s]
4
10
3
10
2
10
10
1
-1
10
-2
10
-3
10
-1
10
XT4 Ekip LS/I L-S functions
t [s]
4
0.4...1
0.4
1
1SDC21017GF0001
1
1
1...10 10
10
-1
10
x In I [kA]
1
10
2
10
10
3
10
2
10
0.4...1
0.4
1
1
1...10
10
1SDC21018GF0001
10
2
1
-1
10
-2
10
-3
10
-1
10
1
x In I [kA]
-1
10
10
10
10
1
4/12 SACE Tmax XT UL/CSA | US Technical Catalog
t [s]
10
10
-1
10
-2
10
-3
1
10
10
2
10
3
10
4
1
10
-1
x In
10
2
1
0.2
0.2...1
XT4 Ekip I I function
XT4 Ekip LSI L-S-I functions
t [s]
4
10
1
3
10
10
1SDC21019GF0001
Overload limit
2
10
10
2
1
-1
10
10
t [s]
4
10
3
10
2
10
10
1
-1
10
0.4
I2t ON
0.4...1
1
1SDC21020GF0001
1
1
1...10
1...10
10
4
10
2
10
I2t OFF
-2
10
-3
10
-1
10
1
x In I [kA]
-1
10
10
10
1
-2
10
-3
10
-1
10
1
x In I [kA]
-1
10
10
10
1
XT4 Ekip LSIG, Ekip E-LSIG L-S-I functions
t [s]
4
10
3
10
2
10
10
1
I2t ON
0.4...1
1
0.4
1SDC21021GF0001
1
1
1...10
1...10
10
10
2
10
XT4 Ekip LSIG, Ekip E-LSIG G function
1SDC21022GF0001
Inhibited for I>2 In
-1
10
I2t OFF
-2
10
-3
10
-1
10
1
x In I [kA]
-1
10
10
10
1
US Technical Catalog | SACE Tmax XT UL/CSA 4/13
t [s]
1.2
10
-1
10
-2
10
-3
1
10
10
2
10
3
10
4
1.1
1
x Un
1.3
1.15
1.05
1.25
1.2
1.05
1.05...1.2
0.1
5
0.1...5
t [s]
1.1
10
-1
10
-2
10
-3
1
10
10
2
10
3
10
4
0.7
0.3
x Un
1.5
0.9
0.5
1.3
0.5...0.95
0.1
5
0.1...5
0.95
0.5
Trip curves with electronic trip unit
Trip curves for distribution
XT4 Ekip E-LSIG OV protection
4
1SDC21034GF0001
XT4 Ekip E-LSIG UV protection
1SDC21035GF0001
4/14 SACE Tmax XT UL/CSA | US Technical Catalog
Trip curves with electronic trip unit
t [s]
x In
10
10
-1
10
-2
10
-3
1
10
10
2
10
3
1
10
-1
10
2
13
6
ratio t-hot/t-cold
t-off [s]
10
1.2
1
0.8
0.6
0.4
0.2
0
1
10
2
20E10E5E3E
t [s]
x In
10
10
-1
10
-2
1
10
10
2
10
3
10
4
1
10
-1
10
2
20EC
3EC
t [s]
x In
10
10
-1
10
-2
1
10
10
2
10
3
10
4
1
10
-1
10
2
Trip curves for motor protection
XT2-XT4 Ekip M-LIU L function (cold trip)
1SDC21070GF0001
XT2-XT4 Ekip M-LIU (hot trip)
1SDC21024GF0001
4
XT2-XT4 Ekip M-LIU I function
XT2-XT4 Ekip M-LIU
U function
1SDC21025GF0001
1SDC21040EF0001
US Technical Catalog | SACE Tmax XT UL/CSA 4/15
I2t [106 A2s]
x I
rms
[kA]
10
1
10
2
10
3
1
10
10
-2
10
-1
I2t [106 A2s]
x I
rms
[kA]
10
1
10
2
10
3
1
10
10
-2
10
-1
I2t [106 A2s]
x I
rms
[kA]
10
1
10
2
10
3
1
10
10
-2
10
-1
Specific let-through energy curves
480V
XT2H XT2L
1SDC21051GF0001_A
1SDC21051GF0001_B
4
XT2V
4/16 SACE Tmax XT UL/CSA | US Technical Catalog
1SDC21051GF0001_C
XT4H XT4L
I2t [106 A2s]
x I
rms
[kA]
10
1
10
2
10
3
1
10
10
-2
10
-1
I2t [106 A2s]
x I
rms
[kA]
10
1
10
2
10
3
1
10
10
-2
10
-1
I2t [106 A2s]
x I
rms
[kA]
10
1
10
2
10
3
1
10
10
-2
10
-1
XT4V
1SDC21051GF0001_G
1SDC21051GF0001_H
4
1SDC21051GF0001_I
US Technical Catalog | SACE Tmax XT UL/CSA 4/17
I2t [106 A2s]
x I
rms
[kA]
10
1
10
2
10
3
1
10
10
-2
10
-1
I2t [106 A2s]
x I
rms
[kA]
10
1
10
2
10
3
1
10
10
-2
10
-1
I2t [106 A2s]
x I
rms
[kA]
10
1
10
2
10
3
1
10
10
-2
10
-1
Specific let-through energy curves
600V
XT2H XT2L
1SDC21051GF0001_D
1SDC21051GF0001_E
4
XT2V
4/18 SACE Tmax XT UL/CSA | US Technical Catalog
1SDC21051GF0001_F
XT4H XT4L
I2t [106 A2s]
x I
rms
[kA]
10
1
10
2
10
3
1
10
10
-2
10
-1
I2t [106 A2s]
x I
rms
[kA]
10
1
10
2
10
3
1
10
10
-2
10
-1
I2t [106 A2s]
x I
rms
[kA]
10
1
10
2
10
3
1
10
10
-2
10
-1
XT4V
1SDC21051GF0001_L
1SDC21051GF0001_M
4
1SDC21051GF0001_N
US Technical Catalog | SACE Tmax XT UL/CSA 4/19
Ip [kA]
x I
rms
[kA]
10
1
10
2
10
3
10
10
-1
1
2
10
Ip [kA]
x I
rms
[kA]
10
1
10
2
10
3
10
10
-1
1
2
10
Ip [kA]
x I
rms
[kA]
10
1
10
2
10
3
10
10
-1
1
2
10
Limiting curves
480V
XT2H XT2L
1SDC21052GF0001_A
1SDC21052GF0001_B
4
XT2V
4/20 SACE Tmax XT UL/CSA | US Technical Catalog
1SDC21052GF0001_C
XT4H XT4L
Ip [kA]
x I
rms
[kA]
10
1
10
2
10
3
10
10
-1
1
2
10
Ip [kA]
x I
rms
[kA]
10
1
10
2
10
3
10
10
-1
1
2
10
Ip [kA]
x I
rms
[kA]
10
1
10
2
10
3
10
10
-1
1
2
10
XT4V
1SDC21052GF0001_G
1SDC21052GF0001_H
4
1SDC21052GF0001_I
US Technical Catalog | SACE Tmax XT UL/CSA 4/21
Ip [kA]
x I
rms
[kA]
10
1
10
2
10
3
10
10
-1
1
2
10
Ip [kA]
x I
rms
[kA]
10
1
10
2
10
3
10
10
-1
1
2
10
Ip [kA]
x I
rms
[kA]
10
1
10
2
10
3
10
10
-1
1
2
10
Limiting curves
600V
XT2H XT2L
1SDC21052GF0001_D
1SDC21052GF0001_E
4
XT2V
4/22 SACE Tmax XT UL/CSA | US Technical Catalog
1SDC21052GF0001_F
XT4H XT4L
Ip [kA]
x I
rms
[kA]
10
1
10
2
10
3
10
10
-1
1
2
10
Ip [kA]
x I
rms
[kA]
10
1
10
2
10
3
10
10
-1
1
2
10
Ip [kA]
x I
rms
[kA]
10
1
10
2
10
3
10
10
-1
1
2
10
XT4V
1SDC21052GF0001_L
1SDC21052GF0001_M
4
1SDC21052GF0001_N
US Technical Catalog | SACE Tmax XT UL/CSA 4/23
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