The CYCLOPS Y – Purge Indicator for use in Division 1 and Zone 1 hazardous areas, which monitors minimum overpressure from one pressure point. Type Y purge and pressurization reduces the classification within a protected enclosure from Division 1 and Zone 1 to Division 2 and Zone 2. Requiring all equipment in the protected enclosure to be approved for Division 2 or Zone 2 hazardous area locations.
Failure to maintain minimum overpressure within the protected enclosure is indicated locally by a green LED and for required remote monitoring a dry contact alarm is standard. The purge time is a manual operation and once the enclosure has been purged of ignitable or flammable concentrations, only minimum overpressure is required to be maintained and it is not necessary to remove power from the protected equipment upon the loss of minimum overpressure.
The enclosure exhaust vent is an integrated part of the CYCLOPS Y – Purge Indicator casing, which comes standard in anodized aluminum and as an option in 316 stainless steel, with voltage options in 12 or 24 VDC. The CYCLOPS Y – Purge Indicator mounts directly to the enclosure being monitored. This means no additional holes, sheet metal, or tubing for plumbing is required for installation.
The CYCLOPS Y – Purge Indicator provides objective evidence of the presence of adequate minimum overpressure from a single pressure point within electrical equipment enclosure. When the monitored enclosure reaches required minimum overpressure above the reference atmospheric pressure surrounding the enclosure, CYCLOPS’s local green LED will light up. A manually controlled purge time may then begin. Typically, a minimum purge time is specified to ensure that at least four for Division or five for Zone enclosure volumes is exchanged.
After the manual purge time has elapsed and the CYCLOPS’s local green LED indicator light is still illuminated, showing that the monitored enclosure minimum overpressure is being maintained, power may be manually connected to the electrical equipment within the protected enclosure.