Collector
Main function:The collector can easily modify device's parameters locally / remotely and have reliable safety measures to prevent unauthorized personnel from setting parameters.
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STS three phase four wire electronic pre-paid electricity meter
Main function:metering function, parameter monitoring, data storage, display function, communication function, anti-electric theft function, pre-payment function
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Three-phase four-wire electronic prepaid energy meter
Main function:metering function, parameter monitoring, time-sharing metering, data storage, load curve, display function, communication function, anti-electric theft function
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Single-phase electronic prepaid energy meter
Main function:metering function, parameter monitoring, data storage, display function, load curve, communication function, anti-theft function, prepayment function
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STS single-phase electronic prepaid energy meter
Main function:The electricity meter mainly consists of current, voltage sampling, electric power measurement unit, microprocessor, magnetic retention relay and LCD liquid crystal display.Microprocessor measures active power, And to exchange data with TOKEN through the keyboard, to achieve various control functions.
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IC single-phase electronic prepaid energy meter
Main function:metering function, parameter monitoring, data storage, display function, load curve, communication function, anti-theft function, prepayment function
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Three-phase four-wire electronic prepaid energy meter
Main function:metering function, parameter monitoring, time-sharing metering, data storage, load curve, communication function, anti-electric theft function
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STS three phase four wire electronic pre-paid electricity meter
Main function:metering function, parameter monitoring, data storage, display function, communication function, anti-electric theft function, pre-payment function
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现在电表主要还是分为两个大类，一个是单相电表，一个是三相电表，它们的功能和使用范围都是有些不同的。电表作为智能设备终端，已经渗透于我们生活的方方面面，那么电表如何选型和接线呢?下面小编来介绍一下三相电表和单相电表的区别有哪些?接线有什么注意事项?
一.三相电表和单相电表的区别有哪些?
1.功能有差异
单相电表一般智能计量有功电量或者是反向有功电量，功能相对于三相电表也比较单一。
三相电表除了可以计量有功电量之外，还能够计量无功电量，功能方便三相电表也单相电表要复杂的多。
2.适用范围不同
三相电表一般运用于电流运用比较大的地方，比如工厂、政府大楼、别墅、商铺等，这些用电的需求量比较大，所以三相电表是最好的选择，三相电表还可以加互感器使用，所以加互感器的三相电表是没有电流最大值的，多大的电流，只要互感器的变比够都是可以的。
单相电表虽然也可以做互感式的，但是单相电表大部分还是直入式，只要适用于出租房，酒店公寓等，直入式的电表，对最大电流也是有要求的，如果超过最大电流，电表就会被烧坏。
二.接线有什么注意事项?
不管是三相互感式电表还是单相互感式电表，接线时必须注意以下几点：
S1必须接1、S2接3，不能接反;否则都会出现电表反转
火线必须从互感器的P1面穿入，从P2面穿出;否则都会出现电表反转
国家要求连接S1、S2的导线必须用2.5平方以上的铜线
为了防止电流互感器开路产生的高压，电流互感器S1或者S2必须接地，一般接在配电箱的地排上或者和地线连接起来
以上就是本篇文章的全部内容，如果您想要了解更多关于三相电表的相关知识，请关注本网站!
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