AC and DC isolators

DC Isolators

These DC isolators from Kraus and Naimer are designed specifically for PV installations. With interlocked lids (the lid cannot be removed if the switch is in the 'on' position), padlockable switches, and IP66/67 rated enclosures, they are an excellent, safe choice - and for a quality switch from a European manufacturer, remarkably well priced.

The KGD40 can cope with up to 50A at 1000V and new permanent magnet technology in the contact body greatly reduce arcing time, improving safety standards. They are also non-polarity sensitive.

The ratings given in the table below are in accordance with the requirements of IEC/EN 60947-3, utilization category DC-21B. Ratings in accordance with DC-21B are suitable for use in the selection of an isolator to isolate a PV string input to a PV inverter.

DC 21B Ratings

AC Isolators

There is a choice of two styles of AC isolators on offer for single phase domestic kits; a traditional rotary-switch isolator also from Kraus and Naimer or a side-operated handle isolator from ABB which offers excellent value.

We also have larger isolators for the higher current three-phase installations.