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Environmental Ratings
Overvoltage Category:
PESD
™
CAT III 1000 V & CAT IV 600 V per UL61010, 3
Edition
RD
Safety category ratings are important, differences and limitations are as follows:
CAT III 1000 V –rating allows up to 1000-V phase to ground with distribution level wiring, 480-volt
and 600-volt circuits such as 3-phase bus and feeder circuits, motor control centers, load centers and
distribution panels. Also included in CAT III are switchgear, motors, transformers and similar fixed
loads, and loads that can generate their own transients.
CAT IV 600 V - rating means that it is suitable for use in all locations such as 3-phase utility or outdoor
wiring on conductors that have up to 600-V phase to ground. Applications may include overhead or
underground lines that power detached buildings or underground lines that power well pumps.
Transient Withstand: Both CAT III & CAT IV ratings are tested to withstand an 8,000-V transient
overvoltage event from a 2 ohm source.
Pollution Degree:
2 -
Equipment being evaluated to 60950, Laboratories, Test Stations,
Office Enviroment
NEMA Enclosure designation:
- UL TYPE
TYPE 4X Either indoor or outdoor use to provide a degree of protection against falling rain, splashing
water, and hose-directed water, undamaged by the formation of ice on the enclosure; resists corrosion.
TYPE 12 Indoor use to provide a degree of protection against dust, dirt, fiber flyings, dripping water, and
external condensation of noncorrosive liquids.
TYPE 13 Indoor use to provide a degree of protection against lint, dust seepage, external condensation
and spraying of water, oil, and noncorrosive liquids.
Ingress Protection: IP67
First digit 6 = Dust-Tight. Second digit 7 = Protected against short periods of immersion in water.
Operating maximum altitude:
5000 meters (UL's testing limit)
Humidity:
95% RH @ 1,000 hours
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