Lightning strikes, even if it is only indirect or partially direct, can cause transient over voltages. If not effectively addressed, the said natural phenomena can damage the mains powered electronic equipment, and the consequences could be catastrophic. This scenario causes loss of stored data, equipment damage, deterioration of production, health and safety hazards among plants, fire and electric shocks, to name a few.  

However, with effective transient over voltage protection, the perilous transient over voltages can be avoided. Furse introduces a cost-effective way of preventing transient over voltages (or surged) through the newest Modular Mains Protectors (MMP). MMP series are suitable for use on single or three phase mains supplies and power distribution system in buildings.   

The MMP B275B and MMP C275 are pluggable modular mains Surge Protective Device (SPD) under the range of Modular Mains Protectors. MMP B275B is a Class B protector. It should be in a main distribution panel, suitable for attachment to a 35mm top hat DIN rail. Its varistor based design eliminates the high flow current (If) associated with spark gap based surge protection. It has two red indicators that show when the protector needs replacement. If only one indicator is displayed, there is still limited protection offered by the unit. This indication can also trigger a remote signal contact to interface with a building management system.

On the other hand, MMP C275 units are under the Class C protectors. It is advisable to install these units in a sub-distribution panel or as close as possible to the equipment to be protected. The base must be attached to a 35mm top hat DIN rail. This series employs replaceable protection modules. Similar to MMP B275B, its design eliminates the high flow current and has a red indicator.  

            The MMP series are helpful in the efficiency of building management systems. These are usually installed in the circuit breakers and distribution panels of large buildings to protect the electrical equipments.