The LSZ three-phase integrated current
transformer is suitable for installation on the three-phase bushing ring of the
switchgear and the main column switch for the measurement and protection of
three-phase current and zero-sequence current. It can also be used for multiple
cable circuits. Measurement and protection of zero sequence current.
The iron core and secondary winding of the
series of zero-sequence current transformers are vacuum casted in a
flame-retardant plastic housing with high-quality epoxy resin, which is
moisture-proof, stable in performance and maintenance-free.
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Technical Parameters:
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Conditions of Use:
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Current Transformer frequency: 50Hz or 60Hz;,
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Ambient temperature: -35 ° C - +55 ° C
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Current Transformer secondary current: 5A or 1A;
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Average temperature: ≤ 40 ° C.
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Power frequency withstand voltage 3kV, 1min;
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Altitude: ≤3000m
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Current Transformer expansion current: 120%In;
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Atmosphericconditions: no serious pollution in the atmosphere
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Implementation standards:GB1208-2006;
WNCB001-2008 (enterprise standard).
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P2 represents the primary polarity end, and S1 and S2 represent
the secondary polarity end; P2 and S2 are the same name end (reduced
polarity).
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Dimensions:
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Model
|
M
（mm）
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φ
（mm）
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D
（mm）
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H
（mm）
|
h
（mm）
|
L
（mm）
|
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LSZ107-75
|
107
|
75
|
65
|
128
|
64
|
322
|
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LSZ107-83
|
107
|
83
|
60
|
150
|
73.5
|
340
|
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LSZ110-83
|
110
|
83
|
50
|
160
|
87.5
|
365
|
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LSZ110-80
|
110
|
80
|
65
|
150
|
75
|
342
|
|
LSZ125-82
|
125
|
82
|
50
|
175
|
100
|
400
|
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LSZ130-83
|
130
|
83
|
55
|
146.5
|
83.5
|
387
|
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LSZ135-83（I）
|
135
|
83
|
57
|
184
|
100
|
440
|
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LSZ135-83（II）
|
135
|
83
|
75
|
184
|
110
|
440
|
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LSZ135-110
|
135
|
110
|
85
|
180
|
100
|
430
|
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LSZ150-65
|
150
|
65
|
85
|
157
|
73.5
|
457
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Rated current ratio, accuracy level and
rated load table:
|
Model
|
LSZ series AC two phase
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Use
|
Measuring current transformer
|
Protection current transformer
|
Double winding Current Transformer
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Current ratio
I1/I2
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Accuracy and rated load（VA）
|
Double windingAccuracy and rated load（VA）
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0.5
|
1
|
3
|
10P15
|
10P10
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10P5
|
0.5
|
1
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10P10
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10P5
|
|
100
|
2.5
|
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1.5
|
3.75
|
|
|
|
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|
150
|
3.75
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|
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2.5
|
5
|
|
|
|
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|
200
|
5
|
|
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2.5
|
7.5
|
2.5
|
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|
2.5
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|
300
|
7.5
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|
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3.75
|
10
|
2.5
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2.5
|
5
|
|
400
|
10
|
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2.5
|
5
|
15
|
2.5
|
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2.5
|
7.5
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500
|
10
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2.5
|
5
|
15
|
2.5
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3.75
|
10
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600
|
10
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2.5
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7.5
|
20
|
5
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3.75
|
10
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800
|
10
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2.5
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7.5
|
20
|
5
|
|
5
|
15
|
|
Model
|
LSZ series three-phase
|
|
Use
|
Measuring current transformer
|
Protection current transformer
|
Double winding Current Transformer
|
|
Rated Current ratio
I1/I2
|
Accuracy and rated load（VA）
|
Double winding Accuracy and rated load（VA）
|
|
0.5
|
1
|
3
|
10P15
|
10P10
|
10P5
|
0.5
|
1
|
10P10
|
10P5
|
|
100
|
2.5
|
5
|
7.5
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1.5
|
2.5
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2.5
|
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2.5
|
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150
|
2.5
|
5
|
7.5
|
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2.5
|
3.75
|
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3.75
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2.5
|
|
200
|
3.75
|
5
|
10
|
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2.5
|
5
|
2.5
|
|
|
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|
300
|
5
|
7.5
|
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3.75
|
7.5
|
2.5
|
|
|
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|
400
|
10
|
|
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2.5
|
5
|
10
|
2.5
|
|
2.5
|
5
|
|
500
|
10
|
|
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2.5
|
5
|
10
|
3.75
|
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2.5
|
5
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600
|
10
|
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|
5
|
10
|
15
|
5
|
|
5
|
10
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|
800
|
15
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|
5
|
10
|
15
|
5
|
|
5
|
10
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Model
|
LSZ series zero sequence
|
|
Use
|
Zero sequence Current Transformer
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Rated Current ratio
I1/I2
|
Accuracy and Current Transformer load（VA）
|
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3
|
10P
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20/1
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0.5
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0.5
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30/1
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0.5
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0.5
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50/1
|
0.5
|
0.5
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100/1
|
1
|
1
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50/5
|
1.5
|
1.5
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75/5
|
2.5
|
2.5
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100/5
|
2.5
|
2.5
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150/5
|
2.5
|
2.5
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Current transformers with different
specifications and parameters can be customized according to user requirements
Wiring schematic:
