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
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M
（mm）
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φ
（mm）
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D
（mm）
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H
（mm）
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h
（mm）
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L
（mm）
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LSZ107-75
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107
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75
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65
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128
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64
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322
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LSZ107-83
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107
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83
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60
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150
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73.5
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340
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LSZ110-83
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110
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83
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50
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160
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87.5
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365
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LSZ110-80
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110
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80
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65
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150
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75
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342
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LSZ125-82
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125
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82
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50
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175
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100
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400
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LSZ130-83
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130
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83
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55
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146.5
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83.5
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387
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LSZ135-83（I）
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135
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83
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57
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184
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100
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440
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LSZ135-83（II）
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135
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83
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75
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184
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110
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440
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LSZ135-110
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135
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110
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85
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180
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100
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430
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LSZ150-65
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150
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65
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85
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157
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73.5
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457
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Rated current ratio, accuracy level and rated load table:
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Model
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LSZ series AC two phase
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Use
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Measuring current transformer
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Protection current transformer
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Double winding Current Transformer
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Current ratio
I1/I2
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Accuracy and rated load（VA）
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Double windingAccuracy and rated load（VA）
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0.5
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1
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3
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10P15
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10P10
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10P5
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0.5
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1
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10P10
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10P5
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100
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2.5
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1.5
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3.75
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150
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3.75
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2.5
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5
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200
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5
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2.5
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7.5
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2.5
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2.5
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300
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7.5
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3.75
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10
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2.5
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2.5
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5
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400
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10
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2.5
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5
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15
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2.5
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2.5
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7.5
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500
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10
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2.5
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5
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15
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2.5
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3.75
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10
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600
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10
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2.5
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7.5
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20
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5
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3.75
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10
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800
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10
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2.5
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7.5
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20
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5
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5
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15
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Model
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LSZ series three-phase
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Use
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Measuring current transformer
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Protection current transformer
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Double winding Current Transformer
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Rated Current ratio
I1/I2
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Accuracy and rated load（VA）
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Double winding Accuracy and rated load（VA）
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0.5
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1
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3
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10P15
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10P10
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10P5
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0.5
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1
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10P10
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10P5
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100
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2.5
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5
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7.5
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1.5
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2.5
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2.5
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2.5
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150
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2.5
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5
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7.5
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2.5
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3.75
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3.75
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2.5
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200
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3.75
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5
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10
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2.5
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5
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2.5
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300
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5
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7.5
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3.75
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7.5
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2.5
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400
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10
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2.5
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5
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10
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2.5
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2.5
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5
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500
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10
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2.5
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5
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10
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3.75
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2.5
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5
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600
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10
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5
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10
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15
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5
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5
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10
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800
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15
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5
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10
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15
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5
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5
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10
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Model
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LSZ series zero sequence
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Use
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Zero sequence Current Transformer
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Rated Current ratio
I1/I2
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Accuracy and Current Transformer load（VA）
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3
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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
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0.5
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0.5
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100/1
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1
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1
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50/5
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1.5
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1.5
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75/5
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2.5
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2.5
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100/5
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2.5
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2.5
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150/5
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2.5
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2.5
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Current transformers with different specifications and parameters can be customized according to user requirements