Bosch Rexroth Tightening System 350, Manual

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80 /641 Bosch Rexroth AG | Tightening Technology 3 608 878 300
System 350 | 3 608 878 300/2019-03
Mains connection for card rack fields
Card rack fields have been designed for 3

230 V alternating voltage.
The card rack fields are intended for operation in industrial environments (emission class A), i. e.:
• no direct connection to the public low-voltage power supply,
• connection to medium- or high-voltage mains via a transformer.
• Observe the connected load listed in table 4–12 when selecting the transformer.
Mains connection for system boxes
The supply cables for the system boxes must be equipped with a protective conductor (PE) in each case.
The system boxes are intended for operation in industrial environments (emission class A), i. e.:
• no direct connection to the public low-voltage power supply.
Operation in asymmetric mains (one mains phase is grounded) is not permissible!
The connection, incl. PE must be designed as a 3-phase connection (4 x 2.5 mm
2
). To avoid short circuits
and ground leakage, a 3-phase 16 A fuse must be provided.
In addition, a PE wire with a minimum cross-section of 10 mm2 Cu must be connected at the X1N3.1/
X1N3.2 interface underneath the system box (see Fig.
4–8 ).
Fig. 4–8: PE conductor connection to X1N3.1/X1N3.2
The voltage selection terminals in the SB356 allow for operating the system box in a voltage range of
380V to 500V. The system box is set to 400 V at the time of delivery.
Recommendation for transformers to connect larger tightening systems
Table 4–13: Adjustable voltage ranges for the SB356 system box
Voltage/current/standard
380 V~ to 415 V~
440 V~ to 480 V~
500V~
Power Application Efficiency [%]
2,5 kVA 1 BT/SB
97,5
5,0 kVA for 3 BT/SB with size 3 spindles
or 2 BT/SB with size 4/5 spindles
98,2
7,5 kVA for 4 BT/SB with size 3 spindles
or 3 BT/SB with size 4/5 spindles
98,3
10,0 kVA for 4 BT/SB with size 4/5 spindles
98,5