晨曦专用呼叫电缆HJYVPZR/SA桦川主要技术指标应符合下表要求： 型号导体组成根/丝径mm²20℃直流电阻Ω/km20℃绝缘电阻MΩ/km工作电容uF/km电感uH/kmMHYVMHYVRP42/0.15(0.75mm²) 26.0 ≥5000 ≤0.10。
ZR-KVVPZR-KVVP2ZR-KVV22ZR-KVV32ZR-KVVPZR-KVVRP1、用途：本产品供交流额定电压500V或直流电压1000V及以下配电装置中电器，仪表接线之用。
2、产品使用特性：电缆导体的长期允许工作温度应不超过70℃。
缆芯包带：缆芯外包覆非吸湿性、非吸油性的绝缘带。
屏蔽：用轧纹(或不轧纹)双面涂塑铝带纵包于缆芯包带之外，两边搭接粘合。
护套：黑色低密度、中密度或高密度聚乙烯。
识别标记：电缆外表面打印识别标记。
标记内容：电缆型号、长度、公司名称及制造年份。
NHA—VV适用范围：同NHB—VV，用于要求耐火较为苛刻的场所。
NHB—VV22适用范围：同NHB—VV，用于能承受机械外力的场所。
NHA—VV22适用范围：同NHB—VV22，用于要求耐火较为苛刻的场所。
NH-VV23NH-VLV23聚氯乙烯绝缘双钢带铠装聚乙烯护套耐火电力电缆PVCinsulatedsteeltapearmouredPEsheathpowercableNH-VV32NH-VLV32交联聚乙烯绝缘细圆钢丝铠装聚氯乙烯护套耐火电力电缆PVCinsulatedthinsteel。
仪表指示是否与刀开关，断路器对应。
母排，线路各连接部位有无过热变色现象。
如果在运行中检查仪表盘上三相负荷是否平衡、三相电压是否相同。
配电柜和电器里面有无放电声和烧焦的异味。
。
带灭弧罩的断路器，刀开关三相灭弧罩是否完整无缺。
这个很多缺陷应该很多都存在，还是应该引起重视。
检查断路器有无过大噪声。
9.母排绝缘夹有无损伤和歪斜，母排夹固定螺丝有无松脱。
10.配电柜里面设备的表面是否清洁，接地连接是否正常良好。
现在将一些错误的观念作出一些澄清。
1.485信号线可以和强电电源线一同走线。
在实际施工当中，由于走线都是通过管线走的，施工方有的时候为了图方便，直接将485信号线和电源线绑在一起，由于强电具有强烈的电磁信号对弱电进行干扰，从而导致485信号不稳定，导致通信不稳定。
Manufacturing technology of frequency converter cable: in the production of special cable for frequency conversion motor, the key operation of insulated wire core and cable forming process are required. The insulation core will directly influence the electrical energy of the cable.
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.
Performance of variable frequency cable: 1. Bryjvp12r-tk and zrbpyjvp12r-tk are designed with type 5 soft twisted copper conductor in accordance with GB/ t3956-1997. 2. Crosslinked polymer insulation, good temperature and weather resistance. 3. Low transmission impedance and good electromagnetic compatibility. 5. Good resistance and low radiation performance. 6. Symmetrical three-core cable structure design, with better transmission performance than four-core cable.
BV line, BVR line, RVSP double stranded shielded cable, RVS double stranded cable, RVB parallel line, RV line RVSP Shielded twisted-pair cable RVSP (shielded twisted-pair cable, shielded cable, shielding twisted-pair electric (HYVP, RVVP) RVVP twisted-pair shielded cable < < shielded wire > > is shielded twisted-pair cable RVSP series on the basis of RVS coupled with a layer of copper wire shielding net, so the transmission loss, shielding the outside world better than RVS series, but because of the copper wire shielding network, its cost is also much higher than RVS series. Are often used to those who has a high requirement on the transmission. Technical indicators: polyvinyl chloride insulated cable long-term allowed working temperature over 70 ℃, the cable temperature under installation should not below 0 ℃, outer diameter (D) is less than 25 The allowable bending radius of mm cable shall not be less than 4 times the outer diameter of the cable. Diameter (D) of 25 mm and above of permissive bending radius of cable, not less than 6 times of cable diameter. The product description: this product is fit for ac rated voltage up to and including 450/750 power, electrical appliances, instruments, instrumentation, telecommunications equipment, lighting circuit and automatic device fixed installation, connection with a soft line, installed with a soft line and strong with shielded wire, according to the needs of use also can produce this kind of wire and cable fire retardant class (ZR), high flame retardant class (GZR), heat-resistant class (90 ℃, 105 ℃, 200 ℃, 250 ℃), low temperature resistant, nylon sheath, refractory (NH ), the company's main products: power cable control computer cable wire and cable wire and cable we specialized in wire and cable production and sales. Our products are high quality and low price, complete variety, there are all kinds of wire and cable, domestic orders can be delivery. We will with the high quality service to your satisfaction. If you have please telephone subscribers.
具有以下几点特点：1、产品能有效预防白蚁、鼠类对电缆的危害，性能可靠长久，无需其他辅助方法；2、电缆产品内无对空气、土壤、人身造成污染和危害的材料，属绿色环保型产品；3、五芯电力电缆适用于三相五线制输配电系统，由于中性线与地线分开使得系统运行更加稳定，操作人员更为安全。
中间继电器实质上是电压继电器。
但它的触点对数多，触头容量较大，动作灵敏。
中间继电器的主要用途是：当其它继电器的触头对数或触头容量不够时，便可以借助中间继电器来扩大它们的触头数和触头容量，起到中间转换的作用。
下图是JZ7系列的中间继电器的外形结构，大家可以参考一下：上图所示的中间继电器是由静铁芯、动铁芯、线圈、触点系统、反作用弹簧和复位弹簧等组成。
它的触点对数较多，没有主、辅触点之分。
各对触点允许通过的额定电流也是一样的，都为5A。
KYJV22ZR-KYJV22铜芯交联聚乙烯绝缘聚氯乙烯护套钢带铠装控制电力电缆敷设在室内、电缆沟、管道、直埋等能承受较大机械外力等固定场合。
KYJV32ZR-KYJV32铜芯交联聚乙烯绝缘聚氯乙烯护套细钢丝铠装控制电力电缆敷设在室内、电缆沟、管道、竖井等能承受较大机械拉力等固定场合。
--铜芯、聚烯烃绝缘、聚氯乙烯护套市内通信电缆。
使用温度均为-30度~60度。
HYA通信电缆，HYA22HYA23铠装通信电缆。
用途：实心绝缘填充型电缆适用于本地电信网的城市与乡镇电信线路，也适用于接入公用网的专用网线路。