Computer Cabinet Power Supply - Brainlab ExacTrac Planning Manual

ELECTRICAL REQUIREMENTS
7.2

Computer Cabinet Power Supply

Cable Connections
You must provide mains connection to the computer cabinet (L1, N, PE). Use a cable diameter
according to the estimated maximum nominal input current, I
Connect the isolation transformer unit (inside the computer cabinet) via cable clamps. Input
clamps accept cable wiring cross section from 2.5 mm
sleeves are required. The cable should reach to the bottom of the computer cabinet plus 3 m for
slack.
Brainlab requires overvoltage category II according to IEC 60664-1.
Supported Input Voltage U
100, 110, 115, 120 V
(each ± 5%)
200, 220, 230, 240 V
(each ± 5%)
Constant power consumption: approximately 500 W.
The protective earth potential of the PE conductor derived from the mains power input
must carry the same PE potential as the linac to avoid potential equalization currents
between the linac and ExacTrac® System.
Computer Cabinet Power Input Main Switch
For service and maintenance of the ExacTrac system (computer cabinet), a power input main
switch with two switching contacts for the simultaneous interruption of both lines (L & N) is
mandatory. The contact opening gap must be at least 3 mm. Major load on mains is the ExacTrac
isolation transformer unit. The main switch should be able to manage high inrush currents when
power is on, as it is required for intended inductive loads (e.g., transformers and electro motors).
This switch is not provided by Brainlab.
Maximum inrush current is 8 x I
Fusing: You must protect the mains input of the ExacTrac System (computer cabinet) with
adequate fusing according to mains power input ratings (I
specs.
Labeling switches:
System power switches must be labeled correctly to distinguish between systems such as:
• Brainlab ExacTrac computer cabinet,
• Brainlab ExacTrac x-ray generators,
• Linac, etc.
Site Planning Manual Rev. 1.0 ExacTrac Ver. 6.x
Max. input current I
N
60 Hz 30 - 32 A
50 Hz 13 - 16 A
.
N
as defined in the table below.
N
2 2
/14AWG to 16 mm /6AWG. No cable end
Recommended Wire
N
Cross-Section
≥ 10mm² (7AWG)
2
≥ 2.5mm (14AWG)
/U ) and the above-mentioned
N N
75