Switchgear Toroidal Current Transformer 0.2s Class High Precision For Energy Meter

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0.2s Class High Precision Cast Epoxy Resin Current Transformer for energy meter Theory 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. Applications 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 Features 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. PARAMETERS - - - - Technical parameters Standards | IEC60044-1; IEC 61869-2; ANSI C57.13; NTC 2205; GB1208-2006 | Rated primary current | 30-1000A | Rated load | 20VA | 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 | Mechanical parameters Dimensions (WDH) (mm) | 45x120x65 | Weight (kg) | 2.1 | Operating conditions Operating temperature | -35C to +55C | Daily average temp | <+40C | Altitude | <3500 meters | Operating conditions - continued Condition | No existence of severely begrimed, erosive and radioactive gas in the air. Permission of long-term operation under rated current. | - - - - TECHNICAL DATA - - - - TypeLZCG530-10LZCG530-10LZCG530-10 PurposeMeasuring current transformerProtection current transformerDouble 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) 0.2S | 0.2 | 0.5 | 10P20 | 10P15 | 10P10 | 0.2S | 0.5 | 10P15 | 10P10 | 30 | | | 2 | | | | | | | | 40 | | | 2.5 | | | | | | | | 50 | | | 3.75 | | | 2 | | | | | 75 | | 3.75 | 5 | | 2 | 3.75 | | | | | 100 | 2.5 | 5 | 7.5 | | 2.5 | 3.75 | | | | | 150 | 5 | 7.5 | 10 | 2.5 | 3.75 | 6.25 | 2.5 | 3.75 | | 2.5 | 200 | 7.5 | 10 | 15 | 3.75 | 5 | 7.5 | 5 | 7.5 | | 3.75 | 300 | 10 | 15 | 20 | 5 | 7.5 | 10 | 7.5 | 10 | 2.5 | 5 | 400 | 15 | 20 | 25 | 6.25 | 7.5 | 15 | 10 | 12.5 | 3.75 | 5 | 500 | 20 | 25 | 25 | 6.25 | 7.5 | 15 | 15 | 15 | 3.75 | 5 | 600 | 20 | 30 | 30 | 7.5 | 10 | 20 | 15 | 20 | 3.75 | 7.5 | - - - - SELECTION GUIDE - - - - ModelPrimary rated currentRated loadAperture (mm)Description (mm)Weight (kg)MaterialWater-proof LZCK-55 | 100-1500A | 10VA | 55 | 18013852 | 2 | PC | IP65 | LMCK185-10 | 300-3000A | 25VA | 185 | 35028355 | 4.5 | PC | IP65 | LZCK310-10 | 300-600A | 10VA | 50 | 50 x 110 x 32 | 1 | Resin | silicon case (option) | LZCK322-10 | 30-600A | 10VA | 50 | 50 x 110 x 52 | 1.6 | Resin | silicon case (option) | LZCK350-10 | 20-600A | 25VA | 50 | 50 x 110 x 105 | 3.1 | Resin | silicon case (option) | LZCG530-10 | 30-600A | 20VA | 45 | 45 x 120 x 65 | 2.1 | Resin | silicon case (option) | - - - - WIRING DIAGRAMS P1, P2 is primary polarity terminal, S1, S2 is secondary polarity terminal. P2, S2 is homonymous terminals (subtractive polarity).

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Beijing GFUVE Instrument Transformer Manufacturer Co.,Ltd.

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