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|Color:||Red And Black||Name:||0.2s Current Transformer|
|Burden:||2.5-20VA||Ratio:||30-1000A/5A Or 1A|
0.2s Class High Precision Cast Epoxy Resin Current Transformer for energy meter
A current transformer (CT) is a type of transformer that is used to measure alternating current (AC). It produces a current in its secondary which is proportional to the current in its primary.
Current transformers, along with voltage or potential transformers, are instrument transformers. Instrument transformers scale the large values of voltage or current to small, standardized values that are easy to handle for instruments and protective relays. The instrument transformers isolate measurement or protection circuits from the high voltage of the primary system. A current transformer provides a secondary current that is accurately proportional to the current flowing in its primary. The current transformer presents a negligible load to the primary circuit.
Current transformers are the current-sensing units of the power system. Current transformers are used at generating stations, electrical substations, and in industrial and commercial electric power distribution.
Measurement current for Power meter
Measurement current for Energy meter
Measurement current for Protection device
New magnetic material is taken to be the core of the current transformer, which has high magnetic permeability, low saturation magnetization and good stability. Therefore, the measuring accuracy is higher and the instrument security factor is lower. Since the high quality silicon processed by advanced technology is taken to be the core of the protection windings, which assured the accuracy limit factor is higher.
The semicircular ring core and secondary windings are vacuum poured by high quality epoxide resin in the fire retardant plastic casing, which has the characteristic of moisture proof, stable performance and dispensing with maintenance.Small size, light weight, small footprint, fixed in the ring network switchgear cable.The cable can cross the current transformer through its internal poles quickly and uniformly.
The Cast Resin Straight-Through Current Transformer can be divided several kinds according to the various current ratio, accuracy and rated loads. The specific parameters are showed in the corresponding to each model parameter tables.
|Standards||IEC60044-1; IEC 61869-2; ANSI C57.13; NTC 2205; GB1208-2006|
|Rated primary current||30-1000A|
|Rated frequency||50Hz or 60Hz|
|Rated secondary current||5A or 1A|
|Rated short-time thermal current||40kA, 1S|
|Rated continuous thermal current||120%I1n|
|Secondary winding power-frequency voltage||3kV, 1min|
|Instrument security factor||FS ≤10|
|Dimensions (W×D×H) (mm)||φ45xφ120x65|
|Operating temperature||-35°C to +55°C|
|Daily average temp||<+40°C|
|Operating conditions - continued|
|Condition||No existence of severely begrimed, erosive and radioactive gas in the air. Permission of long-term operation under rated current.|
|Purpose||Measuring current transformer||Protection current transformer||Double winding current transformer|
|Rated primary current (AMP)||Accuracy class and rated load(VA)||Accuracy class and rated load(VA)||Composite accuracy class and rated load(VA)|
|Model||Primary rated current||Rated load||Aperture (mm)||Description (mm)||Weight (kg)||Material||Water-proof|
|LZCK310-10||300-600A||≤10VA||φ50||φ50 x φ110 x 32||1||Resin||silicon case (option)|
|LZCK322-10||30-600A||≤10VA||φ50||φ50 x φ110 x 52||1.6||Resin||silicon case (option)|
|LZCK350-10||20-600A||≤25VA||φ50||φ50 x φ110 x 105||3.1||Resin||silicon case (option)|
|LZCG530-10||30-600A||≤20VA||φ45||φ45 x φ120 x 65||2.1||Resin||silicon case (option)|
P1, P2 is primary polarity terminal, S1, S2 is secondary polarity terminal.
P2, S2 is homonymous terminals (subtractive polarity).
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