2、用途：本产品适用于直流和交流50HZ-60HZ下，额定电压450/750V及以下的控制、信号保护和测量线路。
3、产品型号规格及范围：产品型号规格范围使用场合KYV,KYVP,KYVP20.5-10mm2,2-61芯此产品绝缘电阻高，防水性能强，较好的耐寒性，适用于弱电控制系统或强电磁场干扰区。
Flame-retardant cables: • cables used in electrical equipment for electrical equipment connection lines, internal or external wiring
五、规格范围型号标称截面（mm2）0.50.751.01.52.54610芯数 KVV KVVP2-612-142-10 KVVP24-614-144-10 KVV227-614-614-144-10 KVVR4-61 KVVRP4-61。
五、规格范围型号标称截面（mm2）0.50.751.01.52.54610芯数 KVV KVVP2-612-142-10 KVVP24-614-144-10 KVV227-614-614-144-10 KVVR4-61 KVVRP4-61。
HYAT53铜芯实心聚烯烃绝缘填充式挡潮层聚乙烯护套单层纵包轧纹钢带铠装聚乙烯套市内通讯电缆553型机械保护层可以加到任何结构的电缆上，以增加电缆的机械强度，提高防侵蚀能力，是为易受机械破坏及及易受侵蚀的地区而设计的电话电缆。
C722电压保持在7.5V。
3当Y输出高电平时，C722又被充电到10V。
当Y变为低电平是C722（10V）对C715(7.5V)充电。
C715=8.75V。
当Y输出高电平时，此时C715两端的电位为：左边：5V,右边：13.75V(5V+8.75V)，C715对C719充电，C719电压变为11.875V，C715由于对C719充电，电压变为11.875V。
此时+15V_ALWP电压是11.875V。
10KV及以下电缆平行安装时，相互净距不小于0.1m，10-35KV不小于0.25m；交叉安装时距离不小于0.5m。
电缆敷设温度不低于0℃，弯曲半径：多芯电缆≥15(D+d)，单芯电缆≥20(D+d)，（D为电缆外径，d为导体外径）。
为保证电缆和电动机的正常工作，在选择电缆截面时，应遵守以下四条原则：（1）电缆正常运行时，其实际温升应不超过绝缘所允许的最高温升。
（2）按电缆线路工作时的允许电压损失进行选择。
（3）电缆截面的选择要满足机械强度的要求。
塑铜线类型BV线又分为：ZR-BV和-BV：铜芯聚氯乙烯绝缘阻燃电线：绝缘料加有阻燃剂，离开明火不自燃。
NH-BV：铜芯聚氯乙烯绝缘耐火电线：正常着火情况下还可以正常使用。
BV线学名：铜芯聚氯乙烯绝缘电线四、耐高温控制电缆氟塑料绝缘耐高温控制电缆用途：氟塑料绝缘耐高温控制电缆适用于交流额定电压450／750V及以下控制、监控回路以及电器仪表的连接线和自动控制系统的传输线。
EISC-SS阻燃本质安全电缆EISC-SS-R阻燃电缆（电线）（企业标准）本企业标准主要技术指标系参照IEC出版物及英国BS5308Part1标准资料编制。
用途：本产品识用于交流额定电压450/750V及以下，抗射频干扰及抗近场耦合能力较强的对本质安全要求的敷设场所；也适用于有瓦斯爆炸环境运作的工业部门的集散系统和本质安全电路信号传输等。
RVSP屏蔽双绞线；RVSP屏蔽双绞电缆RVSP(屏蔽双绞线,屏蔽电缆,屏蔽双绞电缆屏蔽双绞铠装电缆,并可提供屏蔽双绞铠装电缆技术咨询和屏蔽双绞铠装电缆的结构尺寸屏蔽双绞铠装电缆-屏蔽双绞铠装电缆大全-专业生产屏蔽双绞铠装电缆大型企业屏蔽双绞铠装电缆-屏蔽双绞铠装电缆大全-专业生产屏蔽双绞铠装电缆.。
PVV：聚氯乙烯绝缘聚氯乙烯护套信号电缆PYV：聚乙烯绝缘聚氯乙烯护套信号电缆PVV22：聚氯乙烯绝缘聚氯乙烯护套钢带铠装信号电缆PYV22：聚乙烯绝缘聚氯乙烯护套钢带铠装信号电缆软芯控制信号电缆：软芯控制信号电缆用途:适用于额定电压U0/U450/750V及以下控制、监视回路及保护线路的连接线，主。
从而在1s内发生溢出的次数(即溢出率)可由公式所示：从而波特率的计算公式由公式所示：在实际应用时，通常是先确定波特率，后根据波特率求T1定时初值，式又可写为：电路详解3串行通信实验电路图下面就对所示电路进行详细说明。
最小系统部分(时钟电路、复位电路等)第一讲已经讲过，在此不再叙述。
我们重点来了解下与计算机通信的RS-232接口电路。
可以看到，在电路图中，有TXD和RXD两个接收和发送指示状态灯，用了一个叫MAX3232的芯片，那它是用来实现什么的呢?我们要知道计算机上的串口是具有RS-232标准的串行接口，而RS-232的标准中定义了其电气特性：高电平“1”信号电压的范围为-15V~-3V，低电平“0”信号电压的范围为+3V~+15V。
Armoured communication cable armoring cable type: HYA53, HYAT53, HYA23 HYAT23, HYV22, HYA22 (rat, buried) armoring communication cable USES: armoured communication cable mechanical protective layer can be appended to the structure of the cable, with the mechanical strength of the cable, antierosion capability, is vulnerable to mechanical and designed and vulnerable to erosion area telephone cable. Any kind of laying can be adopted, which is more suitable for direct buried laying in rock area. Armored communication cable structure: 1. Basic cable: any filled and unfilled cable with single sheath or double sheath structure. 2. Armored communication cable mechanical protection layer: type 53 adopts 0.15mm thick corrugated steel belt, which is longitudinal wrapped on the basic cable and overlapped on both sides. The surface of the steel belt is coated with plastic to prevent corrosion and water intrusion. The type 23,22 has similar performance with double steel band wrapping. 3. Armored communication cable sheath: black high-molecular weight low-density polyurethane or polyurethane sheath. Sheath thickness may depend on the basic cable outer diameter. 5. The marking contents of armored communication cables include: wire diameter, number of wire pairs, cable model, length, manufacturer name and year of manufacture. 6. Armored communication cable electrical characteristics: the cable meets all the electrical requirements of the basic cable. 6. Cable length: mechanically protected cable is made according to the length of the corresponding basic cable
Features: rated voltage UO/U is 300/500v. Allowed working temperature does not exceed 70 ℃, laying temperature not lower than 0 ℃, allowed bending radius should not less than 12 times of cable outer structure of soft cable should be no less than eight times outside the cable, copper tape screened cable shall be less than 15 times of cable diameter.
WDZA-YJY/WDZB-YJY/WDZC-YJYWDZA-YJLY/WDZB-YJLY/WDZC-YJLY交联聚乙烯绝缘聚烯烃护套A(B、C)类阻燃电力电缆可敷设在对阻燃且无卤低烟有要求的室内、隧道及管道中。
Flexible cable RVVT, RVV RVVTP resistance to bending RVVPT RVVT detail TRVV flexible cable, cable RVVTP RVVPT bending resistant cable type: TRVV connection and control using the flexible cable, widely used in dry or wet indoor, reciprocating bend free mobile no compulsory pull drag chain system. Such as machine tool processing equipment, logistics delivery system, port machinery, complete equipment installation engineering. Product features: according to customer requirements, color core or coding core. High quality PVC mix is adopted to reduce the requirement of cable outer diameter for installation space. The designed cycle bending life is 5 million times, and the actual use has exceeded 6 million times. Cable structure: conductor: using multi-strand fine ground and other fine twisted into a bundle conductor oxygen-free copper wire, conform to DIN VDE 0295 grade 6 insulation: high quality PVC mixture color: color line core or coding line core 3 core + yellow or green conductor sheathed: high quality PVC mixture color: black, grey, orange electrical characteristics: rated voltage U0 / U < 0.5 was 300/300 V p o. 5 was 300/500 V test voltage: 3000 V U meet DIN VDE 0281 part 2 temperature range: ℃ mobile installation: fixed installation: - 5 ℃ ~ + 70 ℃ and 30 ℃ ~ + 70 ℃ when continuous movement, the minimum bending radius: 7.5 x cable diameter