Intrinsically safe electrical safety barrier
Fulleon
Barriers and isolators provide the initial power limitations on the supply circuit, but work in different ways. Barriers are the simpler, but require a secure connection to a dedicated IS earth point, Isolators use more complex electronics but can operate earth-free and are more tolerant of supply voltage. Both barriers and Isolators must be mounted in the safe area as close as possible to the hazardous area.
Intrinsically safe (IS) systems provide safe operation of equipment in hazardous areas by limiting the amount of electrical energy in the circuit to levels where a fault cannot cause a spark that would ignite any explosive atmosphere that could be present. For an IS system to operate correctly, both the barrier or isolator and the devices in the hazardous area must be approved and designed to work together.
The HA / GI and HA / ZVB units are supplied complete with a polycarbonate enclosure fitted with a DIN rail and earth terminals. The extension units E / GI and E / ZB are supplied ready to clip into existing enclosures to provide more circuits where required.
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