82
Bosch Rexroth AG
| Tightening Technology
3 608 878 300
System 350
| 3 608 878 300/2019-03
4.2.6
Calculation of power loss
The resulting losses depend on
•
the compact system or modular system used, and the modules installed in the card rack field/system
box.
•
Tightening case
The calculation for expected losses is as described below.
4.2.6.1
Power loss when idle
Calculation of power loss when idle:
P
G
= Total of power losses of all installed components when idle.
4.2.6.2
Losses during tightening
The power needed at the tightening position is calculated from the speed and the maximum torque:
.
A mean torque of 1 Nm and a resulting power demand of 6 W (at 55 min
–1
).
For pre-tightening:
For final tightening:
Approximately the same power is calculated for the power loss in the servo amplifier.
Table 4–14: Power consumption of the installed components
Module
Static power consumption
Tightening s LT35x or Er
LTU350/1
19W
CS351E-D (IL)
23W
1
1
Power loss in ready mode
CS351E-G (IL)
26W
/ 23W
2
2
23 W with activated screensaver
CS351E-D NK
3
3
Available as of version V2.200 of the Rexroth Tightening System 350
24W
CS351S-D (IL)
23W
CS351S-G (IL)
26W
/23W
24W
BT356 incl. VM
48W
SB356 incl. VM
53W
Per KE
8W
Per SE
8W
Per IM
5 W
Example
2 card rack fields with a communication unit, 4 control units, and 8 tightening sp LT35x or
Er LTU350/1:
P
G
2
48W
8W
4
+
+
8W
8
+
19W
288 W
=
=
P
M
2
n
=
M
2
n
200 NM
2
20
60s
----------
419 W
=
=
M
2
n
400 NM
2
20
60s
----------
838W
=
=
Summary of Contents for Rexroth Tightening System 350
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