Tuttnauer 5596 SP-1, Руководство по эксплуатации и обслуживанию

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Page 8 of 101 pages
2.3 The Electric System
The electric system of the autoclave comprises of the power circuits, including the
commands, switching and protective components, required for the operation of the
electric equipment of the machine.
The following parts are located in the electric box, mounted on the side of the
autoclave and having the dimensions 40 x 30 x 20 cm.
♦
The contactor for the drive of the heaters.
♦
The solid state relays for the command of the heaters, water
pump and vacuum pump.
♦
The circuit breakers for protection of all power circuits.
♦
The power supply for powering of electronic circuitry and
solenoid valves.
♦
Protective relays.
♦
The wiring and connection elements.
The power circuits of the steam generator and the vacuum system are connected
to the live terminals in the electric box at a one-phase voltage,
1x 115V 60Hz.
It is important to achieve a steadfast grounding screw connection to the metal-
sheet enclosure of the electric box and metal parts of the autoclave.
The earth installation at the customer’s site must be built in compliance with the
laws and regulations in force and International IEC 61010-1 electrical safety
standards and certified by the competent authorities.
Only authorized electricians are allowed to serve the electrical system!
Description of the Electrical Equipment
The three-phase heating circuits of the steam generator are driven by contactor
and protected by circuit breakers one on each phase. The command signal for the
contactor is output by the microcontroller through a solid state relay.
The water pump of the generator and the vacuum pump are driven by the solid
state relays, the command signals are output by the microcontroller system.
The command circuits are energized by a power supply with four outputs, as
indicated below:
♦
5 VDC for the digital circuits.
♦
24 VDC for the solenoid valves.
The coils of the solenoid valves are connected with an end at +24V and with the
other end to the control output of the controller.
The command is active; i.e. the solenoid valve is actuated when the control
voltage output is low (less than 2V) with respect to ground.
Fuses attain the protection of the electric and electronic circuits operated in direct
current and current limiting circuits, inside the power supply stabilizers.
Two protective relays are designed to stop the pumps operation in case of
interruption of the other phases and save the important data from the RAM
memory in case of power failure.
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