DS44-400 Type 2 AC surge protector - 3-phase+N

The DS40 surge protectors are designed to be used in a multipolar configuration to protect single-phase, 3-phase or 3-phase+neutral AC networks, are used mainly for primary protection at the main electrical panel. They are sometimes associated with dedicated N/PE surge protector based on gas tube technology (DS40G).
2 possible configurations :
Common mode : CT1 configuration

• DS40 surge protectors are connected between line(s), Neutral and protective wire (PE).

Example:

DS42-280 single-phase (L+N) protect 

DS44-400 3-phase+N protect

DS44-230 3-phase+N protect

Common and Differential mode : CT2 configuration

• DS40 surge protectors are connected between line(s) and Neutral to provide differential mode protection. A specific surge protector DS40G is connected between Neutral and Protective wire (PE) for common mode protection. This configuration provides the highest efficiency

Example: 

DS44-400/G 3-phase+N protect

The DS40 impulse discharge capability classifies this SPD as regular Type 2, useful in case of medium lightning density areas. IEC60364 standard requests Type 2 SPD at the entrance of installation if the keraunic level Nk > 25.

This SPD is based on high energy varistor equipped with thermal disconnector and failure indicator, to comply with standards. Version with a remote signaling for disconnection indication is also available (DS4*S).
The DS40 is available for a large range of AC voltages. The DS40 is DIN rail compatible and is built with a plug-in module (DSM40-xxx) and a fixed base, which allows an easy and fast maintenance.