OMVS motors (short motor) - Maximum fluid and ambient temperature
Maximum oil
temperature
Maximum ambient temperature
≤ 20 °C [68 °F] ≤ 40 °C [104 °F] ≤ 60 °C [140 °F]
≤ 40 °C [104 °F] T5 T5 T5
≤ 60 °C [140 °F] T5 T4 T4
≤ 80 °C [176 °F] T4 T4 T4
Classification of maximum surface temperatures for Group IIG equipment
Temperature class Maximum surface temperature
°C [°F]
T3 200 [392]
T4 135 [275]
T5 100 [212]
For Group IIG with T4 classification it is acceptable that small surface areas (total areas ≥ 20 mm
2
and ≤
1000 mm
2
) can have surface temperature up to 200 °C.
For T5 classification it is acceptable that small surface areas (total areas ≤ 1000 mm
2
) can have surface
temperature up to 150 °C.
Maximum surface temperature – Dusty environment (D)
OMS/OMSW motors - Maximum surface temperatures
Maximum oil
temperature
Maximum ambient temperature
≤ 20 °C [68 °F] ≤ 40 °C [104 °F] ≤ 60 °C [140 °F]
≤ 40 °C [104 °F] 115 [239] 135 [275] 155 [311]
≤ 60 °C [140 °F] 130 [266] 150 [302] 170 [338]
≤ 80 °C [176 °F] 145 [293] 165 [329] 185 [365]
OMSS motors (short motor) - Maximum surface temperature
Maximum oil
temperature
Maximum ambient temperature
≤ 20 °C [68 °F] ≤ 40 °C [104 °F] ≤ 60 °C [140 °F]
≤ 40 °C [104 °F] 85 [185] 95 [203] 105 [221]
≤ 60 °C [140 °F] 100 [212] 110 [230] 120 [248]
≤ 80 °C [176 °F] 115 [239] 125 [257] 135 [275]
OMT/OMTW motors - Maximum surface temperatures
Maximum oil
temperature
Maximum ambient temperature
≤ 20 °C [68 °F] ≤ 40 °C [104 °F] ≤ 60 °C [140 °F]
≤ 40 °C [104 °F] 110 [230] 130 [266] 150 [302]
≤ 60 °C [140 °F] 120 [248] 140 [284] 160 [320]
≤ 80 °C [176 °F] 135 [275] 155 [311] 175 [347]
User Manual
ATEX instruction for OMS, OMT and OMV
Introduction OMS, OMT and OMV
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Danfoss | September 2016 11160602 | AQ00000213en-US0103 | 7