APPLICATIONSAFETY
Fast switching
In view of the safety issues abounding IMO recently introduced a True DC Isolator specifically designed for use in PV installations. The IMO switch design incorporates a user action independent switching mechanism that will cause the disconnection of the load circuits in a maximum of 5ms and also incorporates specific suppression chambers in order to alleviate the arc that will occur when switching these levels of electricity. In launching our product to the
installation market, we have noted that the current overriding trend is the use of AC type isolators that have been de-rated for DC use.
IMO PV isolator products are true DC switching isolators, not an AC type de-rated or re-wired for DC operation. IMO products have a switching speed that is independent of the operator, that is the IMO mechanism is such that there is no direct linkage between the operator handle and the switch contacts. As the IMO handle is moved it interacts with a spring mechanism which upon reaching a set point causes all the contacts to “SNAP” over thereby causing a very fast break/make action which means that the arcs produced by the constant DC load are normally extinguished within 5ms.
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www.solar-pv-management.com Issue IV 2011
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