带岭三芯矿用橡套电力电缆得意
Flame-retardant Cables: ibec60332-3 / bs4066-3 flame-retardant grades (BunchedWires or Cables vertical Flame On BunchedWires/Cables) this is a beam cable. According to the test regulations, the 3.5m long cable samples are fixed with iron wire on the trapezoid frame, and the number of samples is determined according to the non-metallic materials required for different classification. The sample is hung vertically on the back wall of the furnace and air is introduced into the furnace through the inlet on the bottom plate. At 750 ℃ flame propane plane and the sample, the sample in the compulsory blowing (5 m3 / min air emissions, wind speed 0.9 m/s), must be in vertical combustion is not up to 20 minutes, cable within 2.5 meters flame spread out on its own. IEC60332 is divided into A, B, C and D to evaluate the flame retardant performance.
KVVP聚氯乙烯绝缘,聚氯乙烯护套铜丝编织屏蔽控制电缆敷设在室内、电缆沟中、管道内及地下,具有防干扰能力。KVVP聚氯乙烯绝缘,聚氯乙烯护套软控制电缆敷设在室内移动要求柔软等场合。KVVRP聚氯乙烯绝缘,聚氯乙烯护套铜丝编织屏蔽软控制电缆同上具有防干扰能力。
由于含卤阻燃电缆(包括阻燃电缆、低卤低烟阻燃电缆)在燃烧时会释放具有腐蚀性的卤酸气体,大大阻碍消防工作从而耽误救火时间并加剧火势蔓延,因此在人口密度较高的公众场所应尽量设计选用无卤低烟阻燃电缆。在人口密度较小的作业区可以选用任意一种阻燃电缆。阻燃电缆分为A、B、C3类,其中A类阻燃电缆性能较B、C类更优,价格也最贵。设计人员提供订货清册时应标明阻燃电缆的类别。从外观上无法区分阻燃电缆的A、B、C类别,只有靠制造厂家进行供货保证,因此在设计选用时应慎重选择电缆制造厂家。带岭三芯矿用橡套电力电缆得意
变频电缆使用条件1、额定电压U0/U:0.6/1KV.2、电缆导体长期允许最高温度为90度,短路时最高温度250度3、安装敷设环境温度不低于0度,固定敷设时环境温度不低于-10度.4、电缆允许最小弯曲半径不小于15D(D-电缆外径,mm)变频电缆性能1、BRYJVP12R-TK、ZRBPYJVP12。

2、采用特种丁腈复合料,减小了电缆外径,降低对安装空间的要求。3、设计使用循环弯曲寿命为500万次-2000万次不等。4、瞬间移动速度:2米-4米/秒。5、具有柔性、移动、耐磨、耐油、耐弯曲、耐扭曲、耐折、防紫外线、耐弱酸碱、耐候性等性能。
P、PR是连接制动电阻器,拆开端子PR-PX之间的短路片,在P-PR之间连接选件制动电阻器。P、N是连接制动单元,连接选件型制动单元或电源再生或高功率因数转换器P、P1是连接DC电抗器,拆开端子P-P1间的短路片,连接选件改善功率因数用电抗器PR、PX是连接内部制动电阻,用短路片将PX-PR间短路,内部制动回路便生效变频器外壳接地用,必須与大地相接接地电源、电动机与变频器的连接电源、电动机与变频器在连接时,要注意电源线**不能接U、V、W端,否则会损坏变频器内部电路,由于变频器工作时可能会漏电,为安全起见,必须将接地端子与接地线连接好,以便于泄放变频器漏电电流。
无卤低烟阻燃电缆和含卤阻燃电缆相比,有低腐蚀、低烟的优点,但电性能及机械性能明显降低,所以在进行电缆敷设时,无卤低烟阻燃电缆应较含卤阻燃电缆有更大的弯曲半径。在进行电缆敷设设计时,不宜将非阻燃电缆和阻燃电缆并列敷设,不宜将不同阻燃类别的阻燃电缆并列敷设。
阻燃电缆标准:电缆涉及火灾安全的主要技术指标是CO2电缆的阻燃性、烟雾的密度和气体的有毒性。美国防火标准较关注前两个问题,但是欧洲和美国对火灾安全有着完全不同的观点。
美国传统的概念认为:火灾的根源在于一氧化碳(CO)毒气的产生以及其后的燃烧过程中CO转化为CO2的热释放,因此,控制燃烧过程中的热释放量可减少火灾的危害。欧洲传统以来深信:在燃烧中产生的卤酸(HCL)释放量、气体腐蚀性、烟雾浓度及气体毒性是决定人们能否安全脱离火灾现场的主要因素。
主要产品型号HYA、HYAC、HYAT、HYAT53、HYA531、 HYA(管道/架空)内导体线径(mm):0.40、0.50、0.60、0.70、0.80、0.90对数 (对):5—30002、 HYAC(架空 ) 内导体线径(mm):0.40、0.50、0.60、0.63、0.70、0.80、。
This product is suitable for electronic computers with rated voltage of 500V and cables with high requirement of anti-interference. Type K B low density polyethylene with anti-oxidation property is adopted for insulation of cable core. Polyethylene high insulation resistance, good resistance to voltage, small dielectric coefficient and temperature and the influence of variable frequency dielectric loss is small, can not only meet the requirements of transmission performance, and can ensure the service life of the cable. In order to reduce crosstalk and external interference between circuits, the cable adopts shielding structure. The shielding requirements of cables are respectively adopted according to different situations, such as the method of shielding the hinged combination, the method of shielding the hinged combination, and the method of shielding the hinged combination after the hinged combination. Shielding materials are round copper wire, copper belt, aluminum belt/plastic composite belt three. Shielding pair and shielding pair have good insulation performance. If there is potential difference between shielding pair and shielding pair, the signal transmission quality will not be affected.

Eight core SYV - 75-5 coaxial cable of the radio frequency cable, home video line, etc., are SYV solid core polyethylene insulated PVC sheathed coaxial cable, 75 of which means the resistance of the conductor is 75 ohms, 5 large diameter refers to the insulation of the cable is 5 mm (4.8 + / - 0.2 mm), 5 instead of 7, 7 cannot replace with 5, because insulation in large and small, not big to small generation.
为了评定线缆的阻燃性能优劣,国际电工委员会分别制定了IEC60332-1、IEC60332-2和IEC60332-3三个标准。IEC60332-1和IEC60332-2分别用来评定单根线缆按倾斜和垂直布放时的阻燃能力(国内对应GB12666.3和GB12666.4标准)。IEC60332-3(国内对应GB12666.5-90)用来评定成束线缆垂直燃烧时的阻燃能力,相比之下成束线缆垂直燃烧时在阻燃能力的要求上要高得多。
IEC60332-1/BS4066-1阻燃等级(单根电线或电缆垂直燃烧测试FlameTestONSingleVerticalInsulatedWires/Cables)
今天我们来分享一下看电路图的技巧,很多朋友刚刚接触电路图,感觉很复杂无从下手。我们就用星三角正反转电路这个经典案例简单分析一下,要想看懂复杂的电路图,首先要学会分析。就是把复杂的电路分解成自己认识的电路,然后连贯在一起。两个基础的电路一定要熟练:自锁和互锁自锁按下自复按钮开关SB2以后,接触器KM吸合。SB2复位以后,接触器KM通过自身的常开点持续吸合,这就是自锁。要点:启动按钮并联KM的常开点。互锁互锁一般出现在正反转电路中,为了避免2个接触器同时吸合,2个接触器之间必须电气互锁。
聚乙稀绝缘综合护套钢带铠装聚氯乙烯护套PTYA23PTYA22PTY23PTY22PTYAH23PZYA23PZYA22PZY23PZY220.8mm(1/1.0MM)4-61芯适用于交流额定电压500V或直流电压1000V及以下传输音频信号及固定敷设的铁路信号和集团自动化装配的控制线路,能传输铁路。