Dense places; In places with high safety requirements for dense cables or closed channels, automatic fire detection and alarm devices suitable for reliable operation of the environment should be equipped. The oil supply system of open oil charging cable should be equipped with automatic fire alarm and lock device which can reflect the state of oil spraying. Places with high safety requirements, such as dense cable parts of underground public facilities, terminal setting of multi-return oil-filled cables and other places, can be equipped with special fire fighting facilities such as water spray extinguishing.
EISC-S铜芯聚乙烯绝缘，聚氯乙烯护套二芯绞合屏蔽，阻燃本质安全电缆敷设在室内.电缆沟道的固定场合ISC-S22铜芯聚乙烯绝缘，聚氯乙烯护套二芯绞合屏蔽，阻燃内钢带铠装本质安全电缆敷设在室内.电缆沟管道内，直埋能承受较大机械外力等固定场合EISC-SS 铜芯聚乙烯绝缘，聚氯乙烯护套二芯绞。
Fire retardant soft structure cable for communication equipment room (power line of communication equipment) Computer cable DJVPV DJVVP, DJYVP DJYJVP, DJYPV, DJYJPV, DJVPVP, DJYPVP, DJYJPVP, JVV, JVVP DJYPRV lights with cable JDYJY - 2 kv 1 x6 lights with cable DJ - JDKR - 500 - v 1 x2. 5 1 x4
HYAT：铜芯实心聚烯烃绝缘填充式挡潮层聚乙烯护套市内通信电缆。
HYAC：铜芯实心聚烯烃绝缘自承式挡潮层聚乙烯护套市内通信电缆。
HYA53：铜芯实心聚烯烃绝缘挡潮层聚乙烯护套钢塑带铠装聚乙烯护套市内通信电缆。
如数控机床、电子设备、五金冲压、木材石材机械、玻璃与门窗机械、注塑机、机械(人)手、建筑机械、重型机械厂、汽车制造、起重运输设备、自动化仓库、码头等室内外环境需要的场所。
如数控机床、电子设备、五金冲压、木材石材机械、玻璃与门窗机械、注塑机、机械(人)手、建筑机械、重型机械厂、汽车制造、起重运输设备、自动化仓库、码头等室内外环境需要的场所。
Y电容串接在高压地和低压地之间，有时会采用两个Y电容串联是为了提高高压地和低压地之间的耐压，有时候会出现耐压不足的情况，导致安规电容打耐压过不了，可以选用高压陶瓷电容作为Y电容，Y电容通常接法有四种情况：输入端,和共模电感形成滤波器,L和N分别对PE加储能大电容正负端对PE加（如所示）输出端对PE加变压器原副边跨接（如所示）X电容和Y电容同属于安规电容。
当安规电容器失效后，不会产生电击，不会危及人身安全。
自承式电缆结构：导线：退火裸铜线，铜线直径为0.32，0.4，0.5，0.6，0.7，0.8，0.9mm。
绝缘材料：高密度聚乙烯或乙/丙共聚物，绝缘现的颜色符合全色谱标准。
绝缘线对：二根不同颜色的绝缘线按不同的节距扭绞成对，采用规定的HYAC-索道通信电缆-的详细介绍色谱组合以便识别。
Purpose: the self-supporting non-filled cable is suitable for the urban and township telecommunication lines of local telecommunication network, and also for the special network lines connecting to the public network. It is economical and practical to use the same outer protective layer for hoisting line and cable. The mechanical and electrical properties of the cable remain unchanged under conditions of 30~C - 60~C. Structure: wire: annealed bare copper wire, copper wire diameter is 0. 4, 0. 50, 0. 60, 0. 70, 0. 80, 0. 90 mm. Insulating material: high density polyethylene or ethylene-propylene copolymer. The color of the insulated wire is in accordance with the full chromatographic standard. Pair of insulated wires: two different colored insulated wires are twisted in pairs according to different pitch and are identified by a specified chromatographic combination. Core structure: with 25 pairs as the basic unit, more than 25 pairs of cables are assembled according to the unit, each unit is wired with the unit of specified chromatogram to identify different units. 100 pairs or more of cables plus 1% of the reserve pair. Core tape: wrap with a polygrease film tape. Shielding: the two sides are overlapped with or without corrugated metal strip, beyond the cable core of the longitudinal capsule. The plastic film coated on the surface of the shielding belt and the bonding sheath of the protective layer: black low density polyethylene. Hoisting line: the hoisting line is 7 strands of galvanized steel strand, nominal outside diameter is 6. 3 and 4 mm. The tensile strength of two types of 75mm is not less than 3000kg and 1800kg respectively. The suspension wire is coated with thermoplastic paint to prevent the steel wire from corrosion. Identification and length marking
阻燃电缆阻燃电缆，是指在规定试验条件下，试样被燃烧，在撤去试验火源后，火焰的蔓延仅在限定范围内，残焰或残灼在限定时间内能自行熄灭的电缆。
根本特性是：在火灾情况下有可能被烧坏而不能运行，但可阻止火势的蔓延。
The mine communication cable has the characteristics of fire prevention, damp proof and so on. The reason of fire is mainly caused by overloading, short circuit, excessive resistance and external heat source. Under the fault conditions such as short circuit, local overheating and external heat, the insulation resistance of insulating materials decreases, the insulation capacity is lost, and even the fire is caused.
注意：电线电缆安装应熟悉电线电缆性能的安装人员或专职技术人员担任，如仍有不清事项，请向相关技术部门或我厂技术部咨询。
VV22VLV22VV23VLV23聚氯乙烯绝缘聚氯乙烯聚乙烯护套钢带铠装电力电缆敷设在室内、隧道内直埋土壤，电缆能承受机械外力作用。
自承式电缆屏蔽：用轧纹或不轧纹金属带纵包子缆芯包带之外，两边搭接。
屏蔽带表面涂敷的塑料薄膜与护层粘接自承式电缆护套：黑色低密度聚乙烯。
自承式电缆吊线：吊线为7股镀锌钢绞线，标称外径为6．3mm和4．75mm两种，其抗张强度分别不小于3000kg和1800kg，吊线用热塑性涂料涂敷，以防钢丝锈蚀。
以SB2为启动按钮、SB1为停止按钮，KM1为电源接触器，KMKM3分别为Δ连接和Y连接接触器，FR为热继电器保护触点，可作出plc控制的端子分配和外部接线图、梯形图如图a)、b)所示。
根据图b)可知：启动按钮I401接通后，Q430得电吸合并自保、Q432得电吸合，电机以星形接法起动。
计时器T100得电开始计时，到设定的5s时，T100动作，其常闭触点断开Q432和T100，其常开触点闭合接通Q431并自保，电动机以Δ连接全压运行。
带钢丝绳PVC弹性体行车控制电缆，行车控制电缆，带钢丝绳电缆-带钢丝绳的电缆，电动葫芦电缆，电动葫芦专用电缆，带钢丝绳的行车控制电缆，带钢丝的行车控制电缆，行车电缆，行车手柄线，天车手柄线，电动葫芦手柄线）型号KVVRC带钢丝绳PVC弹性体行车控制电缆具有柔软、耐磨、防油等特性，线旁附钢丝绳，增强抗。
2.485信号线可以使用平行线作为布线，也可以使用非屏蔽线作为布线。
由于485信号是利用差模传输的，即由485+与485-的电压差来作为信号传输。
如果外部有一个干扰源对其进行干扰，使用双绞线进行485信号传输的时候，由于其双绞，干扰对于485+，485-的干扰效果都是一样的，那电压差依然是不变的，对于485信号的干扰缩到了最小。
Spin cassette XF5-273 communication cable transfer box, adopting advanced technology at home and abroad, in accordance with the international advanced standard production in the eighty s of cable wiring equipment, for the city, the town of telecommunication network backbone cable and wiring cable transfer. Features: 1. The connection jumper adopts rotary clamp-type connection and is sealed with silica gel on the metal clip, because it is not only reliable and durable, but also easy to operate and repair without stripping. 2. The wiring terminals in the handover box shall be arranged in 25 pairs as a basic unit, consistent with the basic units of the local telephone cables and marked with Numbers on the terminals to facilitate construction and maintenance. 3. The structure, arrangement and installation dimensions of the wiring modules are exactly the same as those of 3M products and can be used for each other. 4. The box body is treated by electrostatic spraying, beautiful and generous, with clear lines, good anti-corrosion and waterproof performance and long service life. Main technical parameters: the environment temperature: - 40 ℃ ~ + 65 ℃ atmospheric pressure: 70 ~ 106 kpa relative humidity: 95% or less is random ends and insulation resistance between terminals and ground > 5 x 104 Μ Ω. When connecting any two ends and any terminals and grounding to 1000V ac, there shall be no breakdown or flying arc in 1min. Contact resistance between wire and terminal < 5 x lO - 3 Ω.
|MHYV mine cable |MHYVR mine cable |MHYVP mine shielded cable |MHY32 mine cable |MHYVRP mine shielded cable | mine monitoring cable? Mining cables, suitable for transmission in mines, can be used or fixed. ? Fire retardant cable for mine (now referred to as fire retardant communication cable for coal mine)? 1. Product adoption: mt818-1999? MHYVR (PUYVR)? (1 x 2? 1 x 4? 2 x 2? 3 x 2? 4 x 2? 5 x 2? 6 x 2? 8 x 2? 10 x 2?) Polyurethane polyurethane sheathed mine cable for general transmission in mine. ? MHY32 (puyv39-1)? (1 x 2? 1 x 4? 2 x 2? 3 x 2? 4 x 2? 5 x 2? 6 x 2? 8 x 2? 10 * 2) 1/1.0, 1/1.38 poly-insulated steel wire armored poly-chloride sheath coal mine cables are used for transmission in roadway or shaft or inclined shaft. MHYV (PUYV) (1 times 2? 1 x 4? 2 x 2? 3 x 2? 4 x 2? 5 x 2? 6 x 2? 8 x 2? 10 * 2) 1/1.0, 1/1.38 polyurethane polyurethane sheath coal mine cables are used for general transmission in mines and are suitable for fixed installation. MHYVRP? 7/0.30, 7/0.37, 7/0.43, 7/0.52 (1 ~ 10 pairs, 1 x 4) polyinsulated copper wire braided shielding PVC sheathed coal mine cables, used for transmission in places with large electric fields. ? MHYVP? (1 x 2? 1 x 4? 2 x 2? 3 x 2? 4 x 2? 5 x 2? 6 x 2? 8 x 2? 10 x 2?) * 7/0.30, 7/0.37, 7/0.43, 7/0.52 poly-insulated PVC sheathed coal mine cables, used for transmission in places with large electric fields and for fixed laying. ?