MVR 0.44-10KA  避雷器  通常连接在电网导线与地线之间

品牌：ABB

型号：MVR 0.44-10KA

产品描述:

无火花间隙的金属氧化物(MO)避雷器，使用ABB金属氧化物电阻器已有30多年的历史。直接模压PUR外壳，环境坚固耐用-高质量，可靠，免维护

适用于交流(AC)和直流(Dc)系统

适用于室内和室外安装

特别推荐用于:电机过电压保护

电缆护套

进一步的高压设备

MVR 0.44-10KA避雷器是一种用于保护电气设备免受高瞬态过电压危害并限制续流时间也常限制续流幅值的电器。避雷器通常连接在电网导线与地线之间，有时也连接在电器绕组旁或导线之间。避雷器也称为过电压保护器或过电压限制器。

MVR 0.44-10KA避雷器的作用是当雷电过电压沿架空线路侵入变配电所或其他建筑物内时，将发生闪络，甚至将电气设备的绝缘击穿。如果在电气设备的电源进线端并联一种保护设备，即避雷器，当过电压值达到规定的动作电压时，避雷器立即开始动作，流过电荷，限制过电压幅值，以保护设备绝缘。电压值正常后，避雷器又迅速恢复原状，以保证系统正常供电。

MVR 0.44-10KA避雷器的保护作用基于三个前提：

保证伏秒特性与被保护绝缘的伏秒特性有良好的配合。

保证其残压低于被保护绝缘的冲击电气强度。

保证被保护绝缘必须处于该避雷器的保护距离之内。

此外，避雷器还具有防止雷电损坏通信线缆的功能。

MVR 0.44-10KA  避雷器  通常连接在电网导线与地线之间

Brand: ABB

Model: MVR 0.44-10KA

Product Description:

Metal oxide (MO) arresters without spark gaps have been used with ABB metal oxide resistors for more than 30 years. Direct molded PUR housing for a rugged environment - high quality, reliable and maintenance-free

Suitable for AC (AC) and Dc (Dc) systems

Suitable for indoor and outdoor installation

Especially recommended for: motor overvoltage protection

Cable jacket

Further high pressure equipment

The MVR 0.44-10KA arrester is an appliance used to protect electrical equipment from high transient overvoltages and to limit the continuation time and often the amplitude of the continuation. The arrester is usually connected between the power grid wire and the ground wire, and sometimes is also connected next to the electrical winding or between the wires. Lightning arresters are also called overvoltage protectors or overvoltage limiter.

The role of the MVR 0.44-10KA lightning arrester is that when the lightning overvoltage along the overhead line into the substation or other buildings, it will flashover and even breakdown the insulation of the electrical equipment. If a protection device, that is, a lightning arrester, is connected in parallel to the power supply inlet end of the electrical equipment, when the overvoltage value reaches the specified operating voltage, the lightning arrester immediately starts to act, flows through the charge, and limits the overvoltage amplitude to protect the insulation of the equipment. After the voltage value is normal, the arrester quickly recovers to ensure the normal power supply of the system.

The protective effect of the MVR 0.44-10KA arrester is based on three premises:

Ensure that the volt-second characteristics match well with the volt-second characteristics of the protected insulation.

Ensure that the residual pressure is lower than the impact electrical strength of the protected insulation.

The insulation to be protected must be within the protective distance of the arrester.

In addition, the lightning arrester also has the function of preventing lightning damage to the communication cable.