介绍一下三相组合式过电压保护器的特点
Introduce the characteristics of three-phase combined overvoltage protector
1、三相组合式过电压保护器采用氧化锌非线性电阻和放电间隙相组合的结构，使二者互为保护。放电间隙使氧化锌电阻的荷电率为零，氧化锌的非线性特性又使放电间隙动作后立即熄弧，无续流，无截波，放电间隙不再承受灭弧任务，提高了产品的寿命。
1. The three-phase combined overvoltage protector adopts a structure that combines zinc oxide nonlinear resistors and discharge gaps to protect each other. The discharge gap causes the charge rate of the zinc oxide resistor to be zero, and the nonlinear characteristics of zinc oxide cause the arc to extinguish immediately after the discharge gap is activated, without continuous current or waveform interruption. The discharge gap no longer bears the arc extinguishing task, which improves the product's lifespan.
2、电压冲击系数为1，在各种电压波形下放电值均相等，不受各种操作过电压波形的影响，过电压保护值****，保护性能优良。
2. The voltage impulse coefficient is 1, and the discharge value is equal under various voltage waveforms, which is not affected by various overvoltage waveforms. The overvoltage protection value is * * *, and the protection performance is excellent.
3、采用四星型接法，对相间和相对地的过电压均能起到可靠的限制作用。可将相间过电压大大降低，与常规避雷器相比，相间过电压降低了60%-70%，大大提高了保护的可靠性。
3. The four-star connection method can reliably limit the overvoltage between phases and relative to ground. The inter phase overvoltage can be greatly reduced. Compared with conventional lightning arresters, the inter phase overvoltage is reduced by 60% -70%, greatly improving the reliability of protection.
4、三相组合式过电压保护器采用硅橡胶外套和高压电缆外引结构，具有易安装、密封性强、体积小、耐振动等优点。可直接安装在开关柜的手车底盘上火互感器室内。
4. The three-phase combined overvoltage protector adopts a silicone rubber jacket and a high-voltage cable external structure, which has the advantages of easy installation, strong sealing, small size, and vibration resistance. It can be directly installed in the fire transformer room on the handcart chassis of the switchgear.
5、过电压保护器的使用环境温度为-40℃-+60℃，海拔高度小于3500m，高于3500m时订货需要提前说明。
5. The operating environment temperature of the overvoltage protector is -40 ℃ -+60 ℃, and the altitude is less than 3500m. If it is ordered above 3500m, it needs to be specified in advance.