SEW-Eurodrive D 16, Руководство по эксплуатации

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4
Installation
VARIMOT® in categories 3G and 3D
Operating Instructions – Explosion-Proof VARIMOT
®
Variable Speed Gear Units and Accessories
13
4.2 VARIMOT
®
in categories 3G and 3D
General
information • SEW-EURODRIVE explosion-proof variable speed gear units of the VARIMOT
®
D/DF 16-46 and VARIMOT
®
D/DF 16-46B series meet the design requirements of
equipment group II, categories 3G (explosive gas atmosphere) and 3D (explosive
dust atmospheres). These units are intended for use in zones 2 and 22 .
• A standard feature of the SEW-EURODRIVE explosion-proof variable speed gear
units of the VARIMOT
®
series is a tapped hole for installing a voltage encoder.
Temperature class • VARIMOT
®
variable speed gear units of category 3G (explosive gas atmosphere)
are approved for temperature class T3. The temperature class of the variable speed
gear unit is indicated on the nameplate.
Surface
temperature • The maximum surface temperature of VARIMOT
®
variable speed gear units, cate-
gory 3D (explosive dust atmosphere) may not exceed 200 °C (392 °F). The system
operator must guarantee that a possible accumulation of dust will not exceed a
maximum thickness of 5 mm, in accordance with EN 50281-1-2.
Ambient
temperature • VARIMOT
®
variable speed gear units may only be used at an ambient temperature
of –20 °C (–4 °F) to +40 °C (+104 °F).
Output power and
output torque • It is essential that nominal values of output power and/or output torque are
maintained.
4.3 Permitted overhung loads without primary gear unit
Definition of force
application of
overhung loads The development of the overhung load depicted in the diagrams refers to a point of
application at mid-point of the shaft extension as indicated in Figure 1. If force is applied
to areas other than the center of the shaft end, consult SEW-EURODRIVE for permitted
lateral forces.
F
R
[N] = permitted overhung load point of application at mid-point of shaft extension.
If an overload condition of the VARIMOT
®
as category 3G or 3D unit cannot be
ruled out during normal operation, a VARIMOT
®
unit with a functioning speed
monitor must be used (see Sec. "Startup", Speed monitoring).
50248AXX
Fig. 4: Definition of force application of overhung loads
F
R
d
l
l/2