電子式電流互感器
 
名稱：電子式電流互感器
型號(hào)：LEFZBJH9-10

LEFZBJH9-10型電子式電流互感器
LEFZBJH9-10 electronic current transformer
一、概述(Description)
本型電子式電流互感器為環(huán)氧樹脂澆注絕緣全封閉穿墻式產(chǎn)品，適用于額定頻率50Hz或60Hz、額定電壓10kV的電力系統(tǒng)中，作電能計(jì)量、電流測(cè)量和繼電保護(hù)用。本產(chǎn)品符合IEC60044-8：2002及GB/T20840·8-2007《電子式電流互感器》標(biāo)準(zhǔn)。
The electronic current transformer is casting resin insulated, wall through and fully enclosed product. It is used for metering electric energy and current, relay protection in the electrical system of rated frequency 50Hz or 60Hz and rated voltage 10kV. The transformer can be executed according to the standards IEC60044-8：2002 and GB/T20840·8-2007.

三、結(jié)構(gòu)簡(jiǎn)介(Construction)
本型電子式電流互感器為環(huán)氧樹脂澆注絕緣全封閉穿墻式結(jié)構(gòu)，耐污染及潮濕，適宜于任何位置、任意方向安裝。測(cè)量范圍寬，二次開路不會(huì)產(chǎn)生高電壓，二次輸出為小電壓信號(hào)，功耗極小，不需將大信號(hào)轉(zhuǎn)化為小信號(hào)，簡(jiǎn)化了誤差源，提高了整個(gè)系統(tǒng)的穩(wěn)定性和準(zhǔn)確度。
The electronic current transformer is casting resin insulated, wall through and fully enclosed product. It is fouling resistance and moisture protection, and can be erected at any position and direction. This transformer has wide measurement scope, the secondary open circuit does not produce high voltage and the secondary output is the signal of low voltage. The power consumption is very small. As there is no need to transfer the signal of high voltage to the signal of low voltage, the source of error is simplified and the stability and order of accuracy of the whole system are improved.
四、技術(shù)參數(shù)(Technical data)
1、額定絕緣水平(rated insulation level)：12/42/75kV
2、局部放電水平符合GB/T20840·8-2007《電子式電流互感器》標(biāo)準(zhǔn)。(The conditions of the partial discharge test according to GB/T20840·8-2007《electronic current transformer》will be fulfilled without exception.)
3、此互感器二次繞組可生產(chǎn)單繞組、雙繞組、三繞組。(The secondary windings of this transformer can produce single winding, double winding and three windings.)
4、用戶如有其它技術(shù)要求，可與我廠聯(lián)系。(If the customer has other requirement for technology, they can contact our factory.)
5、技術(shù)參數(shù)表(technical data form)：
表1：額定一次電流及動(dòng)熱穩(wěn)定電流(Rated primary current , rated dynamic and thermal current)

額定一次電流Rated primary current (A)	額定短時(shí)熱電流（Ith） Rated short time thermal current(kA/s)	額定動(dòng)穩(wěn)定電流（Idyn） Rated dynamic current(kA)
20	6/1	15
30、40	12/1	30
50、60	16/1	40
75、100	25/1	63
150、200	31.5/1	80
300-1250	31.5/3	80

表2：常規(guī)技術(shù)參數(shù)(Common technical parameters)

1	設(shè)備最高電壓 Highest voltage of equipment	12kV
2	額定一次電流 Rated primary current	20～1250A
3	額定二次電壓（測(cè)量級(jí)） Rated secondary voltage for measurement	1.5V，4V
4	額定二次電壓（保護(hù)級(jí)） Rated secondary voltage for protection	150mV(空心線圈) 150mV(air-core coil)
5	額定二次電壓（保護(hù)級(jí)） Rated secondary voltage for protection	225mV(鐵心式線圈) 225mV(core type coil)
6	額定輸出數(shù)字量（測(cè)量級(jí)） Rated digital output for measurement	0x2D41
7	額定輸出數(shù)字量（保護(hù)級(jí)） Rated digital output for protection	0x01CF/0x00E7
8	測(cè)量級(jí)準(zhǔn)確級(jí) Accuracy class for measurement	0.2，0.2S級(jí)(class)
9	保護(hù)級(jí)準(zhǔn)確級(jí) Accuracy class for protection	5TPE(空心線圈) 5TPE(air-core coil)
10	保護(hù)級(jí)準(zhǔn)確級(jí) Accuracy class for protection	5P25(鐵心式線圈) 5P25(core type coil)
11	額定頻率 Rated frequency	50Hz（或60Hz）
12	額定負(fù)荷 Rated burden	2kΩ，20kΩ,2MΩ
13	暫態(tài)特性的額定對(duì)稱 短路電流倍數(shù) Rated symmetrical short-circuit-current factor for transient performance	25
14	額定一次時(shí)間常數(shù) Rated primary time constant	100mS
15	額定喚醒時(shí)間 Rated wake-up time	0
16	環(huán)境溫度 Ambient temperature	－40℃～＋40℃
17	環(huán)境污穢等級(jí) Pollution class	Ⅱ

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