电子式电流互感器
 
名称：电子式电流互感器
型号：LEFZBJH9-10

LEFZBJH9-10型电子式电流互感器
LEFZBJH9-10 electronic current transformer
一、概述(Description)
本型电子式电流互感器为环氧树脂浇注绝缘全封闭穿墙式产品，适用于额定频率50Hz或60Hz、额定电压10kV的电力系统中，作电能计量、电流测量和继电保护用。本产品符合IEC60044-8：2002及GB/T20840·8-2007《电子式电流互感器》标准。
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、结构简介(Construction)
本型电子式电流互感器为环氧树脂浇注绝缘全封闭穿墙式结构，耐污染及潮湿，适宜于任何位置、任意方向安装。测量范围宽，二次开路不会产生高电压，二次输出为小电压信号，功耗极小，不需将大信号转化为小信号，简化了误差源，提高了整个系统的稳定性和准确度。
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、技术参数(Technical data)
1、额定绝缘水平(rated insulation level)：12/42/75kV
2、局部放电水平符合GB/T20840·8-2007《电子式电流互感器》标准。(The conditions of the partial discharge test according to GB/T20840·8-2007《electronic current transformer》will be fulfilled without exception.)
3、此互感器二次绕组可生产单绕组、双绕组、三绕组。(The secondary windings of this transformer can produce single winding, double winding and three windings.)
4、用户如有其它技术要求，可与我厂联系。(If the customer has other requirement for technology, they can contact our factory.)
5、技术参数表(technical data form)：
表1：额定一次电流及动热稳定电流(Rated primary current , rated dynamic and thermal current)

额定一次电流Rated primary current (A)	额定短时热电流（Ith） Rated short time thermal current(kA/s)	额定动稳定电流（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：常规技术参数(Common technical parameters)

1	设备最高电压 Highest voltage of equipment	12kV
2	额定一次电流 Rated primary current	20～1250A
3	额定二次电压（测量级） Rated secondary voltage for measurement	1.5V，4V
4	额定二次电压（保护级） Rated secondary voltage for protection	150mV(空心线圈) 150mV(air-core coil)
5	额定二次电压（保护级） Rated secondary voltage for protection	225mV(铁心式线圈) 225mV(core type coil)
6	额定输出数字量（测量级） Rated digital output for measurement	0x2D41
7	额定输出数字量（保护级） Rated digital output for protection	0x01CF/0x00E7
8	测量级准确级 Accuracy class for measurement	0.2，0.2S级(class)
9	保护级准确级 Accuracy class for protection	5TPE(空心线圈) 5TPE(air-core coil)
10	保护级准确级 Accuracy class for protection	5P25(铁心式线圈) 5P25(core type coil)
11	额定频率 Rated frequency	50Hz（或60Hz）
12	额定负荷 Rated burden	2kΩ，20kΩ,2MΩ
13	暂态特性的额定对称 短路电流倍数 Rated symmetrical short-circuit-current factor for transient performance	25
14	额定一次时间常数 Rated primary time constant	100mS
15	额定唤醒时间 Rated wake-up time	0
16	环境温度 Ambient temperature	－40℃～＋40℃
17	环境污秽等级 Pollution class	Ⅱ

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