規(guī)格書SPT204A2013VIP

1、· Beijing Singure Measurement & Control Tech. Co., LTD北京星格測控技術有限公司SPECIFICATION規(guī)格書Customer Name（客戶名稱）Description產(chǎn)品類型 Potential Transformer電壓互感器Customer Part No參數(shù)比2mA/2mAPart Nmber型號SPT204AElectrical Specifications電氣規(guī)范Mechanical Dimensions in mm同名端為對角Rated Primary Voltage Vi(V)原邊電壓（V）100,150

2、,220,300,380Primary Current(mA) 原邊電流（mA）2Secondary Current(mA)副邊電流（mA）2Dielectric withstanging Voltage(HI-pot)耐壓3000 VrmsAccuracy class精度等級0.1絕緣電阻（M）500MWinding tesistance副邊電阻（）110±10Mechanical Specifications機械規(guī)范CUPEncapsulant灌封EpooxyTerminals管腳4Pin*0.8Approx.Weight重量14g±2Tolerance公差（mm）&#

3、177;0.3Storage temp. -25<T<+80,Insulation resiatance Measured ResultSample No.6%10%20%100%120%1f (%)0.1280.1000.007-0.002-0.002()26.2624.5921.6012.0111.072f (%)0.1210.0800.077-0.037-0.037()33.0031.0127.7915.3014.003f (%)0.1080.0920.005-0.011-0.008()27.1225.6822.2211.1710.19推薦電路：使用方法簡介：SPT204實際

4、上是一款毫安級精密電流互感器，輸入額定電流為2mA，額定輸出電流為2mA。用戶使用時需要將電壓信號變換成電流信號，推薦使用電路如圖所示。圖中，R是限流電阻，不論額定輸入電壓多大，調(diào)整R的值，使額定輸入電流為2mA，就滿足使用條件。副邊電路是電流/電壓變換電路，當需要電壓輸出時采用。調(diào)整圖中反饋電阻R和r的值可得到所需要的電壓輸出。電容C1及可調(diào)電阻r是用來補償相移的。建議R取Vo/0.002,r取R/10，C1取值約為65/R（µF）, r '取200k 。電容C2和C3是400至1000pF的小電容，用來去耦和濾波。兩個反接的二極管是起保護運算放大器作用的。運算放大器視精度

5、要求使用，推薦使用OP07系列，使用性能較好的運算放大器較容易達到較高的精度和較好的穩(wěn)定性。運算放大器電源電壓通常取+15V或+12V，也可根據(jù)具體情況自定。圖中電阻R和R要求精度優(yōu)于1%, 溫度系數(shù)優(yōu)于50PPM，R ' 的功率要求有2 倍的余量。用戶使用推薦電路稍加改動也可構成單電源供電模式，適用于單極性A/D轉換器的輸入。額定輸入電流也可以選為1mA以降低功耗或5mA以減小相移，線性度仍優(yōu)于0.1%。SPT204次級如不加運算放大器而直接并聯(lián)一個電阻使輸出變換成電壓信號也是可以的。前提是電阻要小于400W，輸出電壓最大1伏，這時仍能得到線性度優(yōu)于0.1%的輸出電壓信號。和推薦電路

6、比較，其影響如下：1.縮小了互感器的動態(tài)范圍。2.使相移增大。Usage Brief Introduction: SPT 204A is one of the milliampere class high accuracy current mini transformer, rated input 2 mA, rated output 2 mA, when using need transfer voltage signal into current signal, suggest use the electronic circle as below, as the picture showe

7、d, R is the current limiting resistor, no matter what is the rated input, adjust the R to the 2mA, can meet the usage. Sub-circuit is current/voltage transfer to circuit, use this when voltage output, adjust the reactive resistance showed in this picture R and r can get the rated output you need. Ca

8、pacitance CI and adjustable resistance are use to compensate phase shift. Suggest R use Vo/0.002, r use R/10, CI use approximate 65/R（F）， r use 200k. Capacitance C2 is 400-1000PF small capacitance, use to shake proof and filter. C3 can antijamming, the max number will be 400pf. The Diode is use to p

9、rotect the operational amplifier. Suggest use the OP07 series operational amplifier, use the better capability operational amplifier, can easy to reach a high accuracy and reliability. Operational amplifier power usually use +15V or +12V, can also set this according users need. Resistance R and Rs a

10、s showed in the picture require temperature priority 50 PPM, R power require have double residue. User use the recommended circle can also adjust it to form a single power model, apply to single A/D transformers input. Rated input can also choose 1mA to reduce consumption or 5 mA to cut down phase shift, nonlinearity is still precede 0.1. SPT 204 Sub if dont add an operational amplifier, but parallel connect a resistance directly let output transfer to voltage signal is also ok. But the precondition is resistance need smaller that 500R, rated output max 1V, and can sti