黔(Qian)南(Nan)福(Fu)泉(Quan)市(Shi)防(Fang)雷(Lei)工(Gong)程(Cheng)师(Shi)谈(Tan)建(Jian)筑(Zhu)电(Dian)气(Qi)国(Guo)家(Jia)标(Biao)准(Zhun)之(Zhi)弱(Ruo)电(Dian)设(She)备(Bei)防(Fang)雷(Lei)要(Yao)点(Dian)有(You)哪(Na)些(Xie)
黔(Qian)南(Nan)福(Fu)泉(Quan)市(Shi)防(Fang)雷(Lei)工(Gong)程(Cheng)师(Shi)谈(Tan):(?)
1、(?)对(Dui)这(Zhe)些(Xie)弱(Ruo)电(Dian)系(Xi)统(Tong)的(De)防(Fang)雷(Lei)问(Wen)题(Ti),(?)弱(Ruo)电(Dian)行(Xing)业(Ye)的(De)行(Xing)业(Ye)标(Biao)准(Zhun)都(Du)有(You)明(Ming)确(Que)的(De)规(Gui)定(Ding),(?)但(Dan)是(Shi)查(Cha)阅(Yue)这(Zhe)些(Xie)标(Biao)准(Zhun)后(Hou)发(Fa)现(Xian)都(Du)有(You)一(Yi)个(Ge)统(Tong)一(Yi)的(De)要(Yao)求(Qiu):(?)“如(Ru)天(Tian)线(Xian)架(Jia)设(She)在(Zai)房(Fang)屋(Wu)等(Deng)建(Jian)筑(Zhu)物(Wu)顶(Ding)部(Bu),(?)天(Tian)线(Xian)的(De)防(Fang)雷(Lei)与(Yu)建(Jian)筑(Zhu)物(Wu)的(De)防(Fang)雷(Lei)应(Ying)纳(Na)入(Ru)同(Tong)一(Yi)防(Fang)雷(Lei)系(Xi)统(Tong)……”。(?)对(Dui)于(Yu)弱(Ruo)电(Dian)设(She)备(Bei)的(De)防(Fang)雷(Lei),(?)主(Zhu)要(Yao)是(Shi)以(Yi)均(Jun)压(Ya)为(Wei)主(Zhu),(?)建(Jian)筑(Zhu)物(Wu)的(De)电(Dian)源(Yuan)处(Chu)理(Li),(?)接(Jie)地(Di)方(Fang)式(Shi)和(He)选(Xuan)材(Cai)等(Deng)都(Du)与(Yu)弱(Ruo)电(Dian)设(She)备(Bei)有(You)关(Guan)。(?)当(Dang)解(Jie)决(Jue)弱(Ruo)电(Dian)设(She)备(Bei)的(De)电(Dian)源(Yuan)与(Yu)接(Jie)地(Di)、(?)电(Dian)源(Yuan)接(Jie)地(Di)与(Yu)前(Qian)端(Duan)进(Jin)行(Xing)均(Jun)压(Ya)诸(Zhu)问(Wen)题(Ti)时(Shi),(?)小(Xiao)综(Zong)合(He)考(Kao)虑(Lu)是(Shi)不(Bu)行(Xing)的(De)。(?)本(Ben)条(Tiao)编(Bian)写(Xie)的(De)思(Si)想(Xiang)基(Ji)础(Chu)就(Jiu)是(Shi)均(Jun)压(Ya),(?)其(Qi)理(Li)由(You)如(Ru)下(Xia):(?)
(?) (?)各(Ge)种(Zhong)天(Tian)线(Xian)的(De)同(Tong)轴(Zhou)电(Dian)缆(Lan)的(De)芯(Xin)线(Xian),(?)都(Du)是(Shi)通(Tong)过(Guo)匹(Pi)配(Pei)器(Qi)线(Xian)圈(Quan)与(Yu)其(Qi)屏(Ping)蔽(Bi)层(Ceng)相(Xiang)连(Lian),(?)所(Suo)以(Yi),(?)芯(Xin)线(Xian)实(Shi)际(Ji)上(Shang)与(Yu)天(Tian)线(Xian)支(Zhi)架(Jia)、(?)保(Bao)护(Hu)钢(Gang)管(Guan)处(Chu)于(Yu)同(Tong)一(Yi)电(Dian)位(Wei)。(?)当(Dang)建(Jian)筑(Zhu)物(Wu)防(Fang)雷(Lei)装(Zhuang)置(Zhi)或(Huo)天(Tian)线(Xian)遭(Zao)雷(Lei)击(Ji)时(Shi),(?)由(You)于(Yu)保(Bao)护(Hu)管(Guan)的(De)屏(Ping)蔽(Bi)作(Zuo)用(Yong)和(He)集(Ji)肤(Fu)效(Xiao)应(Ying),(?)同(Tong)轴(Zhou)电(Dian)缆(Lan)芯(Xin)线(Xian)和(He)屏(Ping)蔽(Bi)层(Ceng)无(Wu)雷(Lei)电(Dian)流(Liu)流(Liu)过(Guo)。(?)当(Dang)雷(Lei)击(Ji)天(Tian)线(Xian)支(Zhi)架(Jia)时(Shi),(?)由(You)于(Yu)天(Tian)线(Xian)支(Zhi)架(Jia)已(Yi)与(Yu)建(Jian)筑(Zhu)物(Wu)防(Fang)雷(Lei)装(Zhuang)置(Zhi)最(Zui)少(Shao)有(You)两(Liang)处(Chu)连(Lian)在(Zai)一(Yi)起(Qi),(?)大(Da)部(Bu)分(Fen)雷(Lei)击(Ji)电(Dian)流(Liu)沿(Yan)建(Jian)筑(Zhu)物(Wu)防(Fang)雷(Lei)装(Zhuang)置(Zhi)数(Shu)条(Tiao)引(Yin)下(Xia)线(Xian)流(Liu)人(Ren)大(Da)地(Di),(?)其(Qi)中(Zhong)少(Shao)量(Liang)的(De)雷(Lei)电(Dian)流(Liu)经(Jing)同(Tong)轴(Zhou)电(Dian)缆(Lan)的(De)保(Bao)护(Hu)钢(Gang)导(Dao)管(Guan)流(Liu)人(Ren)大(Da)地(Di)。(?)由(You)于(Yu)雷(Lei)电(Dian)流(Liu)的(De)频(Pin)率(Lu)高(Gao)达(Da)数(Shu)千(Qian)赫(He)兹(Zi),(?)属(Shu)于(Yu)高(Gao)频(Pin)范(Fan)畴(Chou),(?)产(Chan)生(Sheng)集(Ji)肤(Fu)效(Xiao)应(Ying),(?)所(Suo)以(Yi)这(Zhe)部(Bu)分(Fen)雷(Lei)电(Dian)流(Liu)被(Bei)排(Pai)挤(Ji)到(Dao)同(Tong)轴(Zhou)电(Dian)缆(Lan)的(De)保(Bao)护(Hu)钢(Gang)导(Dao)管(Guan)上(Shang)去(Qu)了(Liao),(?)此(Ci)时(Shi)电(Dian)缆(Lan)芯(Xin)中(Zhong)产(Chan)生(Sheng)感(Gan)应(Ying)反(Fan)电(Dian)势(Shi),(?)从(Cong)理(Li)论(Lun)上(Shang)讲(Jiang)在(Zai)有(You)集(Ji)肤(Fu)效(Xiao)应(Ying)作(Zuo)用(Yong)下(Xia),(?)流(Liu)经(Jing)芯(Xin)线(Xian)的(De)雷(Lei)电(Dian)流(Liu)趋(Qu)向(Xiang)于(Yu)零(Ling)。(?)
(?) (?)2、(?)同(Tong)轴(Zhou)电(Dian)缆(Lan)芯(Xin)线(Xian)和(He)屏(Ping)蔽(Bi)层(Ceng)与(Yu)钢(Gang)管(Guan)之(Zhi)间(Jian)的(De)电(Dian)位(Wei)差(Cha)没(Mei)有(You)横(Heng)向(Xiang)电(Dian)位(Wei)差(Cha),(?)而(?)仅(Jin)有(You)纵(Zong)向(Xiang)电(Dian)位(Wei)差(Cha),(?)该(Gai)值(Zhi)为(Wei)流(Liu)经(Jing)钢(Gang)管(Guan)的(De)雷(Lei)电(Dian)流(Liu)与(Yu)钢(Gang)导(Dao)管(Guan)耦(Ou)合(He)电(Dian)阻(Zu)的(De)乘(Cheng)积(Ji),(?)钢(Gang)导(Dao)管(Guan)的(De)耦(Ou)合(He)电(Dian)阻(Zu)比(Bi)其(Qi)直(Zhi)流(Liu)电(Dian)阻(Zu)小(Xiao)得(De)多(Duo)。(?)
(?) (?)3、(?)天(Tian)线(Xian)塔(Ta)不(Bu)在(Zai)机(Ji)房(Fang)上(Shang),(?)而(?)且(Qie)远(Yuan)离(Li)机(Ji)房(Fang),(?)此(Ci)时(Shi)要(Yao)求(Qiu)进(Jin)出(Chu)机(Ji)房(Fang)的(De)各(Ge)种(Zhong)金(Jin)属(Shu)管(Guan)道(Dao)和(He)电(Dian)缆(Lan)的(De)金(Jin)属(Shu)外(Wai)皮(Pi)或(Huo)穿(Chuan)金(Jin)属(Shu)导(Dao)管(Guan)的(De)全(Quan)塑(Su)电(Dian)缆(Lan)的(De)金(Jin)属(Shu)管(Guan)道(Dao)应(Ying)埋(Mai)地(Di)敷(Fu)设(She)的(De)理(Li)由(You),(?)参(Can)见(Jian)本(Ben)章(Zhang)第(Di)11.3.4条(Tiao)的(De)说(Shuo)明(Ming)。(?)对(Dui)于(Yu)埋(Mai)地(Di)长(Chang)度(Du)不(Bu)应(Ying)小(Xiao)于(Yu)50m的(De)要(Yao)求(Qiu),(?)还(Huan)是(Shi)沿(Yan)用(Yong)了(Liao)原(Yuan)规(Gui)范(Fan)和(He)《(?)工(Gong)业(Ye)企(Qi)业(Ye)通(Tong)信(Xin)接(Jie)地(Di)规(Gui)范(Fan)》(?)的(De)规(Gui)定(Ding),(?)我(Wo)们(Men)认(Ren)为(Wei):(?)弱(Ruo)电(Dian)设(She)备(Bei)的(De)耐(Nai)压(Ya),(?)一(Yi)般(Ban)比(Bi)强(Qiang)电(Dian)设(She)备(Bei)低(Di),(?)尽(Jin)量(Liang)使(Shi)侵(Qin)入(Ru)的(De)高(Gao)电(Dian)位(Wei)越(Yue)小(Xiao)越(Yue)好(Hao),(?)再(Zai)加(Jia)上(Shang)严(Yan)格(Ge)的(De)均(Jun)压(Ya)措(Cuo)施(Shi),(?)就(Jiu)相(Xiang)当(Dang)可(Ke)靠(Kao)了(Liao)。(?)50m的(De)埋(Mai)地(Di)电(Dian)缆(Lan)段(Duan)或(Huo)穿(Chuan)金(Jin)属(Shu)导(Dao)管(Guan)的(De)全(Quan)塑(Su)电(Dian)缆(Lan)埋(Mai)地(Di)敷(Fu)设(She)的(De)措(Cuo)施(Shi),(?)已(Yi)经(Jing)运(Yun)行(Xing)了(Liao)数(Shu)十(Shi)年(Nian),(?)实(Shi)践(Jian)证(Zheng)明(Ming)是(Shi)安(An)全(Quan)可(Ke)靠(Kao)的(De)。(?)因(Yin)为(Wei)弱(Ruo)电(Dian)设(She)备(Bei)一(Yi)般(Ban)比(Bi)较(Jiao)贵(Gui)重(Zhong),(?)而(?)且(Qie)它(Ta)的(De)前(Qian)端(Duan)设(She)备(Bei)均(Jun)处(Chu)于(Yu)致(Zhi)高(Gao)点(Dian)上(Shang),(?)容(Rong)易(Yi)受(Shou)雷(Lei)击(Ji),(?)或(Huo)者(Zhe)说(Shuo)受(Shou)雷(Lei)击(Ji)的(De)几(Ji)率(Lu)比(Bi)较(Jiao)多(Duo),(?)保(Bao)持(Chi)50m的(De)电(Dian)缆(Lan)段(Duan)是(Shi)适(Shi)宜(Yi)的(De)。(?)
(?) (?)4、(?)金(Jin)属(Shu)管(Guan)道(Dao)直(Zhi)接(Jie)引(Yin)入(Ru)建(Jian)筑(Zhu)物(Wu)时(Shi),(?)即(Ji)使(Shi)采(Cai)取(Qu)接(Jie)地(Di)措(Cuo)施(Shi)后(Hou),(?)若(Ruo)雷(Lei)击(Ji)于(Yu)入(Ru)户(Hu)附(Fu)近(Jin)的(De)管(Guan)道(Dao)上(Shang),(?)高(Gao)电(Dian)位(Wei)侵(Qin)入(Ru)仍(Reng)然(Ran)很(Hen)高(Gao),(?)对(Dui)建(Jian)筑(Zhu)物(Wu)仍(Reng)存(Cun)在(Zai)危(Wei)险(Xian)。(?)因(Yin)此(Ci),(?)如(Ru)果(Guo)管(Guan)道(Dao)在(Zai)没(Mei)有(You)自(Zi)然(Ran)屏(Ping)蔽(Bi)条(Tiao)件(Jian)或(Huo)易(Yi)遭(Zao)受(Shou)雷(Lei)击(Ji)的(De)情(Qing)况(Kuang)下(Xia),(?)在(Zai)入(Ru)户(Hu)附(Fu)近(Jin)的(De)一(Yi)段(Duan),(?)应(Ying)与(Yu)保(Bao)护(Hu)接(Jie)地(Di)和(He)防(Fang)雷(Lei)接(Jie)地(Di)装(Zhuang)置(Zhi)相(Xiang)连(Lian)。(?)
(?) (?)5、(?)当(Dang)避(Bi)雷(Lei)针(Zhen)装(Zhuang)于(Yu)建(Jian)筑(Zhu)物(Wu)上(Shang)并(Bing)采(Cai)取(Qu)本(Ben)条(Tiao)各(Ge)项(Xiang)措(Cuo)施(Shi)时(Shi),(?)即(Ji)使(Shi)雷(Lei)击(Ji)于(Yu)入(Ru)户(Hu)附(Fu)近(Jin)的(De)管(Guan)道(Dao)上(Shang),(?)对(Dui)建(Jian)筑(Zhu)物(Wu)不(Bu)会(Hui)再(Zai)发(Fa)生(Sheng)危(Wei)险(Xian)。(?)
(?) (?)6、(?)由(You)于(Yu)机(Ji)房(Fang)内(Nei)的(De)设(She)备(Bei)大(Da)都(Du)是(Shi)较(Jiao)贵(Gui)重(Zhong)的(De)电(Dian)子(Zi)设(She)备(Bei),(?)经(Jing)不(Bu)起(Qi)大(Da)电(Dian)流(Liu)和(He)高(Gao)电(Dian)压(Ya)的(De)冲(Chong)击(Ji),(?)如(Ru)果(Guo)首(Shou)层(Ceng)地(Di)面(Mian)不(Bu)是(Shi)钢(Gang)筋(Jin)混(Hun)凝(Ning)土(Tu)楼(Lou)板(Ban)时(Shi),(?)要(Yao)求(Qiu)安(An)装(Zhuang)设(She)备(Bei)的(De)地(Di)面(Mian)不(Bu)能(Neng)出(Chu)现(Xian)很(Hen)大(Da)的(De)电(Dian)位(Wei)差(Cha),(?)为(Wei)保(Bao)护(Hu)设(She)备(Bei)的(De)安(An)全(Quan)运(Yun)行(Xing),(?)尽(Jin)量(Liang)做(Zuo)到(Dao)一(Yi)个(Ge)均(Jun)衡(Heng)电(Dian)压(Ya)的(De)电(Dian)位(Wei)面(Mian),(?)故(Gu)要(Yao)求(Qiu)均(Jun)压(Ya)网(Wang)格(Ge)不(Bu)大(Da)于(Yu)1.5m×1.5m。(?)如(Ru)果(Guo)是(Shi)将(Jiang)设(She)备(Bei)安(An)装(Zhuang)在(Zai)钢(Gang)筋(Jin)混(Hun)凝(Ning)土(Tu)楼(Lou)板(Ban)上(Shang)时(Shi),(?)由(You)于(Yu)钢(Gang)筋(Jin)混(Hun)凝(Ning)土(Tu)楼(Lou)板(Ban)内(Nei)的(De)钢(Gang)筋(Jin)足(Zu)以(Yi)起(Qi)到(Dao)均(Jun)压(Ya)作(Zuo)用(Yong),(?)就(Jiu)没(Mei)有(You)必(Bi)要(Yao)再(Zai)作(Zuo)均(Jun)压(Ya)网(Wang)了(Liao)。(?)