In the absence of information about running simultaneity of consumers, please refer to the table
hereunder:
Number of
consumers
For the whole hoisting devices
1
st
motor
2
nd
motor
3
rd
motor
4
th
motor
Most powerful
motor
¹
Motor, in power descending order¹
1
x
x
2
x
x
x
3
x
x
x
4
x
x
x
x
5
x
x
x
x
2 hoisting devices
working together
x
x
x
x
(1) For a drive through n motors of rated intensity ln’ in parallel, please consider l
n
= n x l
n’
2.
INTENSITY DURING THE START-UP PHASE
(2 seconds maximum)
Take into account the number of receivers starting up simultaneously and those already in
operation, then calculate the corresponding intensity. When the start-up intensity is not known, find
the approximate value as follows:
I
d
= K . I
n
for a single receiver
Where
𝐾 =
𝑆𝑡𝑎𝑟𝑡−𝑢𝑝 𝑐𝑢𝑟𝑟𝑒𝑛𝑡
𝑁𝑜𝑚𝑖𝑛𝑎𝑙 𝑐𝑢𝑟𝑟𝑒𝑛𝑡
(In general, K = 5 to 6 for cage motors, K = 2 for slipring motors, K = 2 with frequency converter)
In the absence of information about running simultaneity of consumers, please refer to the table
hereunder:
Number of
consumers
For the whole hoisting devices
1
st
moteur
2
nd
motor
3
rd
motor
4
th
motor
Id
In
Id
In
Id
In
Id
In
1
x
x
2
x
x
x
3
x
x
4
x
x
x
5
x
x
x
x
2 hoisting devices
working together
x
x
x
x
3.
CALCULATION OF THE VOLTAGE DROP
Under normal running conditions, the voltage drop must be within 2% - 6% of the nominal voltage,
according to the operating phase and the upstream/downstream features of the installation. The
voltage drop between the origin of installation and any point of use shall not exceed the standard
or set values for the applications.
Mobilis line calculation
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Edité le 04/01/2017
Page 11/223