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94 CA01305001Z-EN www.eaton.com IZMX circuitbreakers, INX switchdisconnectors Minimum clearances Recommended safety clearances The following information about safety distances is intended to provide a guideline for the installation of circuitbreakers in an enclosure. Enclosure To insulated surface To grounded With cell switch or locking clearance metal surface facilities mm mm mm Withdrawable a 25 25 25 b 25 25 25/75 Fixed a 25 25 – b 30 70 – a ^ distance from highest point of breaker or cassette. c Width of cassette + 75 mm d 550 mm e 4450 mm (front control panel bay) Ventilation 160 cm² (800 - 3200 A) holes 320 cm² (4000 A) Top and bottom } Recommended enclosure clearance and ventilation The illustration shows a typical enclosure. The table below lists the associated minimum distances between enclosures and ventilation openings. This information is intended as a guideline for constructing a suitable circuitbreaker enclosure. Ensure the integration complies with IEC 61439. ① Cell switch (optional) ② Locking facilities (optional) ③ Ventilation openings (do not cover!) ④ Top or rear vent ⑤ Rear or lower vent e d d e c 100 b b b a a a c