Function improvement of type jy82a leakage - detecting relay in combination with the tripping coils of the feed switch 型检漏继电器与配合使用的馈电开关跳闸线圈的改进
Screens ( manual , tripod , electrical ) , and has to be off good quality and all parts are of good quality 屏幕（手动的，三角架，与电开关的）并且开关质量良好，所有部位都要质量良好。
If the electrical switching capacities of the alarm contacts are exceeded or not reached see de 1231 , a relay see de 1230 is to be used to provide an appropriate current rating I如果超过或没达到警报接点的电开关容量参见de 1231 ，则采用一个继电器参见de 1230产生适当的额定电流。
This paper introduces the main qualifications , overall design , hardware circuit diagram and software design of a new protector that can be used in the feeder switch in the shafts of the coal mines 介绍了煤矿井下用于馈电开关的一种新型保护器的主要技术指标、总体设计、硬件电路框图和软件设计。
Abb will replace an existing outdoor 275 kilovolt ( kv ) substation now nearing the end of its service - life with an indoor substation based on compact , state - of - the - art , gas insulated switchgear ( gis ) Abb将用基于体积较小的顶级的气体绝缘接电开关装置（ gis ）的室内变电站替换现有的服务年限将到的室外275千伏特的变电站。
According to research by energy star , if every american home replaced just one light bulb with a compact fluorescent bulb , we would save enough energy to light more than 2 . 5 million homes for a year and prevent greenhouse gases equivalent to the emissions of nearly 800 , 000 cars 让冰箱远离阳光和暖气出风口，并打开恒温器旁边的省电开关及清理冷凝管，这些诀窍将有助于节省能源，同时有益于环保。
Model gk99 - 1 high - speed auto lubricated sew machine is the fastest bag sewing closer of all the machines , adopyed closed automatic lubrication system . the main running parts are adopted bearing and it prolongs the life span of the machine . this machine is equipped with automatic cutting machinery driven by air and it can cut the thread and tape automatically ：本机gk99 - 1是所有封包机种中速度最高的封包缝纫机，采用封闭型自动润滑系统，主要转动部位采用轴承，使产品使用寿命延长，配有气动自动切刀机构，能自动切断线辫及纸带，配上光电开关和时间继电器，可实现满包口袋的自动开车缝纫气动切线自动停车的自动功能。
The main products of our company : series of mining emulsion pump station , series of electric haulage shearer , sparying pump station , series of mining flame - proof vacuum / air electromagnetic starter , series of mining vacuum / air feeding switch , series of mining fame - proof and natural - safe . type ac soft starter , series of hydraulic stand valve and pipe system , high flow rate quick - moving valve , the new product nearing into market - the hydraulic support electric - control system , mining electric drill , hydraulic valve test table , electric performance test table 公司主导产品为：系列电牵引采煤机、系列矿用乳化液泵站、喷雾泵站、矿用隔爆兼本质安全型交流软起动器、系列矿用隔爆真空、空气电磁起动器、系列矿用真空、空气馈电开关、系列液压支架阀类及管路系统、大流量快速移架阀、即将投入市场的新产品? ?液压支架电液控制系统、煤电钻系列、液压阀试验台、电性能试验台等。
According to the present actual underground power system which neutral point is grounded through arc suppression coil in many supper big shaft , the development history and present situation of synthetic protection system used in hv flameproof switchgear are reviewed , and on the basis of analyzing the problems existed in high voltage flameproof switchgear , the selective leakage protective method based on the detecting harmonic direction of zero sequence current as well as the value of zero sequence voltage is proposed in this paper , and at the same time , harmonics extracting schematic and transforming circuit are also designed 本文深入系统地研究了基于intel80c196kb单片机控制的6kv防爆开关综合保护系统，主要内容如下：针对大型及特大型矿井供电系统中性点普遍采用消弧线圈接地方式的现状，回顾了国内外矿用高压防爆开关保护系统的发展历史，分析了目前国内高压馈电开关保护系统所存在的问题，提出了“基于零序电压基波启动，五次谐波功率方向比较”的选择性漏电保护原理，设计了相应的五次谐波提取电路和功率方向鉴别电路。
