惠阳8芯耐高温控制线缆莺莺吊线和电缆用同一外护层，经济实用，安装敷设方便。
在一30~C一60~C的环境条件下，电缆的机械和电气性能保持不变。
结构：导线：退火裸铜线，铜线直径为0．32，0．4，0．50，0．60，0．70，0．80，0．90mm。
Flame-retardant cables are characterized by a delay in the spread of flame along the cable so that the fire does not expand. Because of its low cost, it is a kind of cable widely used in fireproof cable. Under the condition of single cable or into a bunch of laying, cable to know when the spread of flame can be controlled within a certain range, so it can avoid fire spreading combustion and lining major disasters, which cable line of fire prevention level.
在一定条件下，也可用于传输2048kbit/s以上的数字信号。
适用于市内、近郊及局部地区架空或管道敷设线路中，也可直埋。
3、对绞：把二根不同颜色的绝缘单线按照不同的节距扭绞成对，以最大限度地减少串音，并采用规定的色谱组合以便识别线对。
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 airport lighting use cable JDYJY - 2 kv 1 x6 airport lighting use cable DJ - JDKR - 500 - v 1 x2. 5 1 x4
型号名称主要使用场所 HYA铜芯实心聚烯烃绝缘铝塑粘结综合护套市内通信电缆管道 HYAC铜芯实心聚烯烃绝缘铝塑粘结综合护套自承式市内通信电缆架空 HYAT铜芯实心聚烯烃绝缘填充式铝塑粘结综合护套市内通信电缆管道 HYA53铜芯实心聚烯烃绝缘铝塑粘结综合护套单层皱纹钢带纵包铠装聚乙稀护套市内通信电缆。
HB型步进电机的定子有槽，线圈为集中方式，为达到机械绕线的目的，绝缘构造也加以改进。
以图左为例，日本伺服(股份)公司用的槽绝缘插入绕线的定子，绕线如右图所示。
该方式如上左图所示，定子铁心厚度为电机厚度的1/2，用裙状绝缘材料插人槽中，铁心槽侧面全部被树脂覆盖,利用绕线机的梭子牵引线机械绕制，线圈一个端点固定在接线柱上，另一端连接固定后从引出线出口引出。
用此方法，电机定子与引出线部分可分开生产，便于部件标准化。
Characteristics of inverter cable: 1. Low effective capacitance; 2. Good fire resistance, can be used in dangerous areas
ZR-VV32ZR-VLV32ZR-VV33ZR-VLV33ZR-VV42ZR-VLV42ZR-VV43ZR-VLV43阻燃聚氯乙烯绝缘阻燃聚氯乙烯/聚乙烯护套钢丝铠装动力电缆敷设在高落差地区，电缆能承受机械外力作用及相当的拉力。
Conditions of use: cable using the environment temperature is to 40 ℃ ~ + 50; At 25 ℃ when the humidity is 95%; Cable laying temperature - 10 ℃ or higher; When laying the cable, the bending radius MHYV is 10 times of the cable outer diameter or 15 times of the cable outer diameter
执行标准：企业标准参照采用MT818.14－1999 。
产品在全国几十个煤业集团及矿山上使用，获得了较高的评价和赞誉。
MHYV（PUYV）（1×2 1×4 2×2 3×2 4×2 5×2 6×2 8×2 10×2）1/1.0、1/1.38聚乙烯绝缘聚氯乙烯护套煤矿用信号电缆用于矿场作普通信号传输，适用于固定敷设。
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
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。
以380伏电动机为例说明。
为了使电动机电流，就要维持磁通密度不变。
在50HZ电源条件下，维持磁通密度不变的电压是(5O/60)X380=317伏。
就是说只要把电源电压降至317伏，60HZ，380ⅴ的电动机在50HZ，380ⅴ的电源上使用不会发热。
注意以下两个问题。
电动机转速将降低17%左右。
由于电压为额定电压的83%，降压后使用的功率仅为原电动机功率的83%。
以上所述，在使用一些老电动机和进口设备(如美国，日本，韩国等)的电动机时希望对电工同行们有所帮助。
Eisc-ss flame-retardant and explosion-proof essential cable eisc-ss-r flame-retardant. The main technical indicators of this company are compiled by referring to the information of IEC227 (1979) and British BS5308Part1. Purpose: this product is mainly used for laying places of essential requirements with rated ac voltage of 450/750v or less, strong anti-rf and anti-near field coupling ability. It is also suitable for distribution and transmission of essential circuits in industrial sectors with gas operation. Conditions of use: 1)? The rated voltage is 450/750v. 2)?? Cable conductor long-term allowed working temperature is 70 ℃. 3)?? The cable temperature under installation should not below 0 ℃, allowed recommended no armoured cable bending radius should not less than 6 times of cable diameter. The armored cable shall not be less than 12 times the outer diameter of the cable.
With the same negative level transmission, when in the light, their impact on the two wires are the same, thus reducing difference at the receiving end can block this (minus operation performed can be understood as a difference of two way). It can be seen from the principle of double stranded lines that the purpose of double stranded lines is to transmit. Therefore, when we make the joint of the twisted pair, we must not separate the two different transmission lines, otherwise it will greatly affect the transmission of the network.