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1984年下半年开滦赵各庄矿在井下低压电网中,投入了矿用一般型和矿用隔爆型电容补偿装置各一台,分别并列于矿用变压器二次母线和低压负载中心。由于能够随负载无功分量自动投切,它分别使采区功率因数由0.5以下和井底车场由0.7以下,提高到0.95～1.0,从而使电缆线路和变压器损耗降低,系统电压降减少,效果相当显著。矿用低压电容补偿装置是由并联电容器和串联电抗器、放电电阻,接触器、继电保护以及投切自动控制器等组成。兹将有关这些器件的特点、常见的故障和维修,阐述如下。一、并联电容器 1.结构特点并联电容器为3相、700V或
In the second half of 1984, Kailuan Zhaochuangzhuang Mine put into use a low-voltage power grid in the underground and put into use one of mine-type and mine explosion-proof capacitor compensation devices, respectively, which are respectively arranged in the secondary busbar and the low-voltage load center of mine transformers. Because it can automatically switch with load reactive components, it makes the mining area power factor from 0.5 and bottom of the bottom of the yard from 0.7 to 0.95 to 1.0, so that the loss of cable lines and transformers reduce system voltage drop, the effect Quite significant. Mine low voltage capacitor compensation device is composed of shunt capacitor and series reactor, discharge resistance, contactor, relay protection and switching automatic controller. The characteristics of these devices, common faults and repairs are explained below. First, the shunt capacitor 1. Structural characteristics Shunt capacitor for the 3-phase, 700V or