Surge protective devices - Type 6 - DC permanently connected

Scope:

1.1

This Standard applies to surge protective devices (SPDs) intended for:

a)            DC permanently connected applications designed for limiting surge voltages and discharging surge currents;

b)            use on DC circuits up to 2000V dc;

c)            Installation on DC apparatus such as but not limited to PV panels, generator inverter outputs, and bulk DC bus. These devices may also be installed on the load side of the main overcurrent protective device;

d)            installation with either internal or external overcurrent protection, and

e)            indoor or outdoor use in accordance with the Canadian Electrical Code, Part I.

1.2

Type 6 SPDs intended for use in lightning protection systems are within the scope of this Standard.

1.3

Equipment designed solely for other power disturbances such as notches, sags and noise is not within the scope of this document.

1.4

SPDs discussed in this standard contain at least one voltage limiting or voltage switching component for diverting surge currents or dissipating surge energy, or both. Examples of such components are metal oxide varistors, silicon avalanche diodes, spark gaps and gas discharge tubes.