黔南干式变压器：电流互感器的工作原理和分类

电流互感器的工作原理和分类 　　
1.工作原理
电流互感器是用来测量线路电流的特殊黔南干式变压器。
要直接测量大大小小的电流.就需要有量程从几安直到几万安的许多电流表。这样就给仪表制造带来很大的困难。此外，有的线路是高压的，如果直接用电表测量高压线路上的电流，是极其危险的。电流互感器就是用来解决这二个问题的设备。
电流互感器有两个互相绝缘的绕组，套在一个闭合的铁心柱上。在运行时，一次绕组与被测线路串联，二次绕组接测量仪表(如安培表、功率表和电能表的电流线圈、继电器的低阻抗线圈等)。因此。在测量高压线路上的电流时，尽管互感器一次电压很高，然面互感器二次电压却很低，操作人员和仪表都很安全。

2.分类
(1)按用途分，分为测量用和保护用(用于继电器和控制装置，保护用电流互感器中包括零序电流互感器)。
(2)按装置种类分，分为户内式和户外式。
(3)按绝缘介质分：
1)油绝缘，即油浸式互感器，是油和纸的复合绝缘，电压可达500—1000kV。
2)浇注绝缘，用环氧树脂或其他树脂浇注成型的电流互感器，电压大于等于35kV采用。
3)一般干式绝缘，包括有塑料外壳的和无塑料外壳的经浸渍漆处理的电流互感器。
4)瓷绝缘，即主绝缘由瓷件构成。
5)气体绝缘，如六氟化硫(SF6)气体。
(4)按结构形式分，分为贯穿式、支柱式、母线式、套管式、正立式、倒立式、"8”字式、"U”字式等。

The working principle and classification of the current transformer

1 How it works
The current transformer is used to measure the line current special transformer.
Direct measurement of the current large and small need to range from a few security until tens of thousands of security many ammeter. This gives the instrument manufacture a great deal of difficulty. In addition, some lines are high voltage, direct electricity meter to measure the current of the power lines on the road is extr企业账号：1611 0032 092 00213 086emely dangerous. The current transformer is used to solve these two problems of equipment.
The current tr电 话：0635-8888299ansformer has two windings insulated from each other, set in a closed core column. At runtime, the primary winding and the measured line in series, the primary and secondary windings connected measuring instruments (eg, ammeter, power meter and power meter current coil, the low impedance of the relay coil, etc.). Therefore. Measuring the current of the power lines on the road, despite the transformer primary voltage is high, then face transformer secondary voltage is very low, the operator and instrumentation are safe.

2 Category
(1) by end-use sub-divided into measurement and protection (for relays and control devices to protect the current transformer zero sequence current transformer).
(2) by device type of sub-divided into indoor and outdoor-type.
(3) insulating medium points:
1) insulation oil, oil-immersed transformers, oil and paper composite insulation voltage up to 500-1000kV.
2) pouring insulation with epoxy or other resin cast molded current transformers, voltage is greater than or equal to 35kV using.
3) General dry-type insulation, including the plastic housing and non-plastic shell impregnated paint to deal with the current transformer.
4) ceramic insulation, main insulation of porcelain pieces.
5) The gas-insulated, such as sulfur hexafluoride (SF6) gas.
(4) sub-structure, divided into throughout the ceremony, strut, bus, tube type, is vertical, inverted, "8" type "U" word type.

更多黔南干式变压器资讯：上海黔南干式变压器厂家黔南干式变压器产品黔南干式变压器资讯