[讨论]请教：IDC机房UPS系统输入压降过大及同相电缆电流偏差

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<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt;"><font color="#4682b4"><font size="3"><span style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman';">某</span><span lang="EN-US"><font face="Times New Roman">IDC</font></span><span style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman';">机房采用</span><span lang="EN-US"><font face="Times New Roman">3</font></span><span style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman';">台雷诺士</span><span lang="EN-US"><font face="Times New Roman">400KVA</font></span><span style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman';">主机</span><span lang="EN-US"><font face="Times New Roman">(12</font></span><span style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman';">脉冲整流，机型同</span><span lang="EN-US"><font face="Times New Roman">"SOCOMEC SICON"</font></span><span style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman';">）组成的</span><span lang="EN-US"><font face="Times New Roman">(2+1)</font></span><span style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman';">并联冗余</span><span lang="EN-US"><font face="Times New Roman">UPS</font></span><span style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman';">系统，总输入开关</span><chmetcnv wst="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="2500" unitname="a"><span lang="EN-US"><font face="Times New Roman">2500A</font></span></chmetcnv><span style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman';">。其三相和零线均用</span><span lang="EN-US"><font face="Times New Roman">300</font></span><span style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman';">截面</span><span lang="EN-US"><font face="Times New Roman">RVVZ</font></span><span style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman';">阻然软电缆</span><span lang="EN-US"><font face="Times New Roman">4</font></span><span style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman';">根并联，每根长度</span><chmetcnv wst="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="340" unitname="米"><span lang="EN-US"><font face="Times New Roman">340</font></span><span style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman';">米</span></chmetcnv><span style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman';">，共布电缆</span><span lang="EN-US"><font face="Times New Roman">16</font></span><span style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman';">根，采用隧道支架水平敷设。低压配电屏为一屏两开关，采用两个</span><chmetcnv wst="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="1250" unitname="a"><span lang="EN-US"><font face="Times New Roman">1250A</font></span></chmetcnv><span style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman';">施耐德开关，每个开关的每相接</span><span lang="EN-US"><font face="Times New Roman">2</font></span><span style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman';">根线，零线排共用，电力室</span><span lang="EN-US"><font face="Times New Roman">UPS</font></span><span style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman';">输入总开关为</span><chmetcnv wst="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="1600" unitname="a"><span lang="EN-US"><font face="Times New Roman">1600A</font></span></chmetcnv><span style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman';">。现每相电流</span><chmetcnv wst="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="900" unitname="a"><span lang="EN-US"><font face="Times New Roman">900A</font></span></chmetcnv><span style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman';">左右，同相电缆之间的电流在</span><span lang="EN-US"><font face="Times New Roman">160<chmetcnv wst="on" tcsc="0" numbertype="1" negative="True" hasspace="False" sourcevalue="350" unitname="a">-350A</chmetcnv></font></span><span style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman';">之间，最大偏差约</span><chmetcnv wst="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="200" unitname="a"><span lang="EN-US"><font face="Times New Roman">200A</font></span></chmetcnv><span style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman';">。零线电流</span><chmetcnv wst="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="150" unitname="a"><span lang="EN-US"><font face="Times New Roman">150A</font></span></chmetcnv><span style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman';">左右（每一根电流相加为</span><chmetcnv wst="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="150" unitname="a"><span lang="EN-US"><font face="Times New Roman">150A</font></span></chmetcnv><span style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman';">，掐零线母排为</span><chmetcnv wst="on" tcsc="0" numbertype="1" negative="False" hasspace="False" sourcevalue="50" unitname="a"><span lang="EN-US"><font face="Times New Roman">50A</font></span></chmetcnv><span style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman';">）。电缆全程压降</span><span lang="EN-US"><font face="Times New Roman">22V</font></span><span style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman';">。电缆和接头温度最高</span><span lang="EN-US"><font face="Times New Roman">32</font></span><span style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman';">度。电流大的电缆有轻度的震动。用单相电力质量分析仪（型号：</span><span lang="EN-US"><font face="Times New Roman">FLUKE-43B </font></span><span style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman';">）测试，谐波成分不大（每相小于</span><span lang="EN-US"><font face="Times New Roman">10%</font></span><span style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman';">）。</span></font></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt;"><span style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman';"><font color="#4682b4" size="3">请教：</font></span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 39pt; TEXT-INDENT: -18pt; mso-list: l0 level1 lfo1; tab-stops: list 39.0pt;"><font color="#ff0000"><font size="3"><span lang="EN-US" style="mso-fareast-font-family: 'Times New Roman';"><span style="mso-list: Ignore;"><font face="Times New Roman">1、<span style="FONT: 7pt 'Times New Roman';">&nbsp; </span></font></span></span><span style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman';">根据</span><span lang="EN-US"><font face="Times New Roman">ΔU</font></span><span style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman';">＝</span><span lang="EN-US"><font face="Times New Roman">IρL/S</font></span><span style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman';">，经计算，线路压降应小于</span><span lang="EN-US"><font face="Times New Roman">5V</font></span><span style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman';">，为何实际压降比计算的大</span><span lang="EN-US"><font face="Times New Roman">17V</font></span><span style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman';">？</span></font></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 39pt; TEXT-INDENT: -18pt; mso-list: l0 level1 lfo1; tab-stops: list 39.0pt;"><font color="#ff0000"><font size="3"><span lang="EN-US" style="mso-fareast-font-family: 'Times New Roman';"><span style="mso-list: Ignore;"><font face="Times New Roman">2、<span style="FONT: 7pt 'Times New Roman';">&nbsp; </span></font></span></span><span style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman';">同相电缆之间的电流为何偏差很大？</span></font></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 39pt; TEXT-INDENT: -18pt; mso-list: l0 level1 lfo1; tab-stops: list 39.0pt;"><font color="#ff0000"><font size="3"><span lang="EN-US" style="mso-fareast-font-family: 'Times New Roman';"><span style="mso-list: Ignore;"><font face="Times New Roman">3、<font face="宋体">长距离</font><span style="FONT: 7pt 'Times New Roman';">&nbsp; </span></font></span></span><span style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman';">应如何布线？依据什么标准？一般低压电缆布放的极限距离是多少？</span></font></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 39pt; TEXT-INDENT: -18pt; mso-list: l0 level1 lfo1; tab-stops: list 39.0pt;"><font color="#ff0000"><font size="3"><span lang="EN-US" style="mso-fareast-font-family: 'Times New Roman';"><span style="mso-list: Ignore;"><font face="Times New Roman">4、<span style="FONT: 7pt 'Times New Roman';">&nbsp; </span></font></span></span><span style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman';">采取什么解决措施加以改进？</span></font></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 39pt; TEXT-INDENT: -18pt; mso-list: l0 level1 lfo1; tab-stops: list 39.0pt;"><font color="#ff0000"><font size="3"><span style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman';">5、交流供电回路压降标准是多少？依据什么标准？</span></font></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 39pt; TEXT-INDENT: -18pt; mso-list: l0 level1 lfo1; tab-stops: list 39.0pt;"><font color="#ff0000"><font size="3"><span style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman';"></span></font></font></p>