PD Devices MDSP3 surge protector

The PD Devices MDSP3 series surge protector devices provide protection against incoming high-voltage spikes and slower rise time disturbances for three-phase 415 V circuits. They are designed for use on incomers at main switchboard level and can be combined with PD devices suitable for lower transient capacity at sub-distribution board level.

The devices are suitable for power lines carrying up to 100 A and provide protection between phase, phase-to-neutral, phase-to-earth and neutral-to-earth. The devices can be employed on higher rated current circuits provided appropriate fusing is installed upstream.

The surge protectors are parallel devices and are readily retrofitted. Being modular in construction, the appropriate protection level can be selected for customised protection levels.

Three surge current level modules can be selected: 90, 150 and 300 kA for line transient current and 150 kA capacity neutral-earth module also available. The standard MOV technology can also be substituted for fast-acting silicon avalanche diodes. Remote signalling options are available as NC or NO contacts to operate alarms.