INTEGRATED ELECTRICAL CABINET
Installation, Operation, and Service Manual
Copyright
2016:
Bevco Engineering Company, Inc.,
W222N5739 Miller Way, Sussex, WI 53089 USA
IECAX480V125A OM1_R51 Siemens IEC Manual for AX Systems
Page 3 of 14
1.0 DESCRIPTION OF OPERATION
This panel incorporates several features desirable for system installations to minimize down time,
protect the X-Ray Generator electronics, and to reduce operational delays after a power outage. This
product replaces the power panel, the lighting control relay box, and the Emergency Power Off
controls. The panel has a main circuit breaker, Q1, provides
fully integrated “X-Ray ON” warning light
control and a relay to reduce the room lighting during the procedure. When the main circuit breaker is
turned off, all power circuits within the panel will be de-energized.
Q1 provides the disconnect means and lock-out and tag-out (LOTO) the X-Ray Generator power circuit
for maintenance purposes. The K2 contactor will open with any loss of power or by pressing any
Emergency Power Off (EPO) pushbutton. The contactor control circuit is factory configured to
automatically re-energize the X-Ray Generator upon restoration of facilities power. The control circuit
may be re-configured to require the operator to manually restart the equipment once the incoming
power has been restored. This protects the sensitive electronic circuits of the X-Ray Generator from
sags and surges that immediately follow power loss from blackouts, storms, utility reclosure operations,
and out of phase automatic transfer switch operations.
The SC1 cabinet is protected by an electronic circuit breaker, Q3, and controlled by contactor K6. The
contactor will open with any loss of power or by pressing any Emergency Power Off (EPO) pushbutton.
The control circuits for the EPOs are low voltage 24 VDC and are fully powered from within the panel.
The restart functionality and EPO circuitry is controlled with a safety relay, K10. See page 11 for detail.
The white SAFETIES OK indicator light on the front of the panel is illuminated when none of the EPOs
are pressed. When the white light is active, pressing the green START pushbutton will cause the X-
Ray Generator to be energized. The green START button will illuminate, and the white SAFETIES OK
light will go off. Pressing the STOP button will de-energize the system. Any EPO pressed while the
system is energized will result in the immediate de-energizing of the X-Ray Generator system.
If an EPO is pressed at any time, the EPO must be reset which will cause the SAFETIES OK light to
activate. Then the START button will activate the system.
The EPOs provided with the IEC include additional Normally Closed contacts for connections to a UPS
system.
IMPORTANT:
If building power is removed from the panel while the X-Ray system is energized, the power to the X-
Ray system will be restored when building power returns without any human interaction. The X-Ray
system can then be restarted normally.
Additional provisions are made to integrate the “X-Ray ON” warning lights and room lighting with the X-
Ray Equipment. The facility lighting panel provides 120- or 277-volt power that is controlled by
contacts relays of K4 and K5 mounted in the IEC. The signal controlling the relays comes directly from
the Siemens Generator/Power Cabinet. The IEC will accept signals from the generator as either Dry
Contacts or 24 Volts AC or DC. Note the maximum connected load to the X-Ray On lights is 20 Amps.
