Surge protection in industrial enclosures

What are the requirements for determining whether surge protection should be installed in industrial enclosures? The enclosures will typically have motor drives, emergency stop systems and sensors/data acquisition.

Usually SPDs are placed in (or next to) distribution boards - and often that provides sufficient protection for downstream equipment, so in those cases you wouldn't then need them in separate enclosures for drives etc. A lot depends on the circumstances though - whether protection is needed just from external sources (lightning) or switching surges from other equipment within the installation, the distance from the DB's SPDs and the level of protection the equipment needs (some especially sensitive equipment may need type 3 SPDs very locally).

   - Andy.

What are the requirements for determining whether surge protection should be installed in industrial enclosures? The enclosures will typically have motor drives, emergency stop systems and sensors/data acquisition.

Usually SPDs are placed in (or next to) distribution boards - and often that provides sufficient protection for downstream equipment, so in those cases you wouldn't then need them in separate enclosures for drives etc. A lot depends on the circumstances though - whether protection is needed just from external sources (lightning) or switching surges from other equipment within the installation, the distance from the DB's SPDs and the level of protection the equipment needs (some especially sensitive equipment may need type 3 SPDs very locally).

   - Andy.