TRS Series of graphite-gap surge protectors belong to Type1 (10/350 waveform)lightning protection,used in AC 50/60Hz, rated voltage up to 275V IT、 TT、 TN-C、 TN-S 、 TN-C-S and other power supply system, It protects the system from indirect and direct lightning effect or other transient over voltage SPD is designed by according with GB18802.1/IEC61643-1 standard.

Structure and Principle

      In a three phases and four wires system, the three-phase wires and a zero wire to ground both with protectors. In normal, protector is in a high-resistance state. When the power grid is stroked by lightning or others to caused the over voltage, the protector will leak the over voltage into the ground in nanoseconds to protect the equipment which connect with power grid. When the surge voltage disappeared through the protector. The protector will recover to high-resistance state, and the power grid is going to working without any effects.

Product Installation

      With 35mm standard Din-rail mounting, connecting copper stranded conductor is 2.5~35mm².

      Each pole is necessary with protection—using fuse or miniature circuit breaker to protect.It helps to protect them in the short circuit when SPD breakdown.

      SPD is installed in front of protected equipment and connected with power supply circuit.A class SPD is installed in the building home-entry line hold larger surge current total distribution box.B,C class products most  install on the floor distribution box,D class SPD isinstalled in front of equipment which with low surge current and in a low residual voltage place.

Model and meaning                                                          Dimension drawing

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AC Series Classification