Setup Height And Ambient Temperature; Degree Of Protection - Bosch Rexroth MKE Series Project Planning Manual

Project Planning Manual | Rexroth MKE Synchronous Motors
DANGER
9.2

Setup Height and Ambient Temperature

Nominal data
Exceeding the nominal data Derat‐
ing – curves
9.3

Degree of Protection

Danger of explosion, danger to life, heavy injury and material damage
⇒ Do not set up drive control devices or connectors in potentially explosive
areas.
⇒ Make sure that connectors cannot reach into the hazardous areas.
⇒ Do not disconnect the connections under load!
⇒ Make sure that no ignition sparks could occur within the hazardous area.
The performance data specified for the motors apply under the following con‐
ditions:
● Ambient temperatures of 0 to +40 ºC
● Setup heights of 0 to 1000 m above MSL.
If you intend to use motors above these ranges, you must take the "utilization
factors" into consideration. This reduces the performance data.
(1) Utilization depending on the ambient temperature
(2) Utilization depending on the setup elevation
f Temperature utilization factor
T
t Ambient temperature in degrees Celsius
A
ΔT60 Operating mode
f Height utilization factor
H
h Setup height in meters
Fig.9-8: MKE derating (utilization factors)
If either the ambient temperature or the setup height exceeds the nominal data:
1. Multiply the torque data specified in the selection data by the utilization
factor.
2. Ensure that the reduced torque data are not exceeded by your application.
If both the ambient temperature and the setup height are exceeding the nominal
data:
1. Multiply the load factors f
2. Multiply the value obtained by the motor torque data specified in the se‐
lection data.
3. Ensure that the reduced torque data are not exceeded by your application.
The degree of protection is defined by the abbreviation IP (International Pro‐
tection) and two reference numbers specifying the degree of protection.
Electric Drives | Bosch Rexroth AG
and Controls
Operating Conditions and Application Notes
and f determined.
T H
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