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JZDY –B/C/D Surge Protector

2018-04-24 10:44

Application Range

JZDY Series Surge Protector is suitable for AC 50/60Hz, 380V and below TT IT JZDY-C, JZDY-S, JZDY-C-S and other power supply system can be used as B, C, and D level of protection, respectively applied at the junction of LPZOB, LP21, LP22 and LP23.

Protection theory and selection standards of surge protector

Protected equipment impact withstand voltage is divided into 4 categories according to IEC60364 three-phase power grid voltage of 230V/400V. The insulation resistance to impact voltage rating can determine the selection of surge protector. Low-voltage electrical equipment according to the label, Over-voltage category for Class,Class, Class, Class, the insulation resistance to impact voltage grade is 1.5KV, 2.5KV, 4KV, 6KV as follows:


Demonstration of the type


Main Application

JZDY-B/C/D Surge Protector is suitable for AC 50/60Hz, 385V and below TT, TN and other power supply system, and widely used in various types of power supply class two (Class B), Class three (Class C) and subtlety Class D over-voltage protection.

Models and application system



Operational principle

In a three-phase four-wire system, three phase lines and one zero line to ground line are connected with surge protector. In normal condition, surge protector is in high resistance state. When a surge overvoltage occurs in the grid due to lightning strikes or other causes, the protector will be switched on quickly in nanosecond time, bring the surge overvoltage to the earth, thus protecting the electrical equipment on the power grid. When the surge voltage passes through the protector, and after vanishing overvoltage, the protector is restored to a high resistance state, so that the normal operation of the power grid will not be affected.

Models and application system



According to the user's requirements, a variety of voltage protection surge protectors can be customized.





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