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Operating Instructions – Explosion-Proof AC Motors DR63/eDR63, DVE250/280
5
Ambient conditions during operation
Electrical Installation
5.10 Ambient conditions during operation
5.10.1 Ambient temperature
The temperature range of -20 °C to +40 °C must be ensured unless specified otherwise
on the nameplate.
Motors intended for use in higher or lower ambient temperatures have specific designa-
tions on the nameplate.
If the motors are used at ambient temperatures above +40 °C (max. +60 °C), the cables
and cable glands must be suited for temperatures
≥
90 °C.
5.10.2 Motor power depending on the installation altitude
The following diagram shows the factor f
H
by which the motor power is reduced as a
function of the installation altitude.
The reduction is calculated as follows: P
H
= f
H
× P
N
The current is calculated as follows: I
H
= f
H
× I
N
5.10.3 Hazardous radiation
The motors must not be subjected to hazardous radiation, such as ionizing radiation.
Consult SEW-EURODRIVE if necessary.
5.10.4 Harmful gas, vapor and dust
If used according to their designated use, explosion-proof motors are incapable of ignit-
ing explosive gases, vapors or dusts. However, explosion-proof motors may not be sub-
jected to gases, vapors or dusts that endanger operational safety, for example through
• Corrosion
• Damage to the protective coating
• Damage to the sealing material, etc.
Selecting gaskets
If the motor is operated in environments with high environmental impact, such as
increased ozone values, you can equip it with high-quality gaskets. If you have doubts
regarding the stability of the gaskets in connection with the respective environmental
impacts, consult SEW-EURODRIVE.
5408843275
0
0.2
0.4
0.6
0.8
1
0
1000
2000
3000
4000
5000
6000
f
H
H [m]