Cebora 962 User manual

CEBORA S.p.A. 1
POWER SOURCE art. 962
SERVICE MANUAL
3.302.230 02/05/2007

CEBORA S.p.A. 2
1- GENERAL INFORMATION
1.1 - Introduction.
The purpose of this manual is to supply synthetic information referred the checks to carry out
in order to find the correct operation of the power transformer and AC capacitors connected to it,
relative to the Power Source art. 962 for plasma cutting systems.
1.2 - General service policy.
It is the responsibility of the customer and/or operator to use the equipment appropriately, in
accordance with the instructions in the Instruction Manual, as well as to maintain the equipment
and related accessories in good working condition, in compliance with the instructions provided
in the Service Manual.
Any internal inspection or repairs must be carried out by qualified personnel who are
responsible for any intervention on the equipment.
It is forbidden to attempt to repair damaged electronic boards or modules; replace them with
original Cebora spare parts.
1.3 - Safety information.
The safety notes provided in this manual are an integral part of those given in the Instruction
Manual. Therefore, before working on the machine, please read the paragraph on safety
instructions in the aforementioned manual.
Always disconnect the power cord from the mains, and wait for the internal capacitors to
discharge (1 minute) before accessing the interior of the equipment.
Some internal parts, such as terminals and dissipaters, may be connected to mains or
otherwise hazardous potentials. It is therefore forbidden to work with the safety guards removed
from the machine unless strictly necessary. In this case, take special precautions such as wearing
insulating gloves and footwear, and working in a perfectly dry environment with dry clothing.
2- MAINTENANCE
WARNINGS
ANY INTERNAL INSPECTIONS OR REPAIRS MUST BE CARRIED OUT BY QUALIFIED
PERSONNEL.
BEFORE BEGINNING MAINTENANCE OPERATIONS, UNPLUG THE POWER SOURCE
FROM THE MAINS AND WAIT FOR THE INTERNAL CAPACITORS TO DISCHARGE (1
MINUTE).
3.302.230 02/05/2007

CEBORA S.p.A. 3
2.1 - AC capacitors voltage checks.
WARNING
FOR THE FOLLOWING TEST TAKE MAXIMUM PRECAUTIONS ESPECIALLY AT THE
MOMENT OF MANUAL ACTIVATION OF CONTACTOR TLP (32), BECAUSE YOU
MANUALLY SUPPLY THE POWER SOURCE POWER CIRCUIT, WHICH CAN BE IN
DEFECTIVE WORKING CONDITION (I.E. CONSIDER THE POSSIBILITY OF
EXPLOSION OF CAPACITORS (52) AND (53), OTHER THAN THE RISK OF
ELECTRICAL SHOCK FROM CONTACT WITH PARTS UNDER VOLTAGE).
CAPACITORS (52) AND (53) WITH OPEN CIRCUIT POWER SOURCE TEST.
Terminals of transformer (38) = voltages according to the table, with open circuit power
source (no pilot arc), and contactor TLP (32) manually activated (push with a plastic stick
over the contactor mobile equipment, up to close its contacts).
Terminals of transformer (38) 1 - 2 2 - 3 3 - 1 4 - 5 5 - 6 6 - 4
Voltage 555 Vac 451 Vac 225 Vac 284 Vac 309 Vac 150 Vac
CAPACITORS (52) AND (53) WITH PILOT ARC TEST.
Terminals of transformer (38) = voltages according to the table, with pilot arc on.
Terminals of transformer (38) 1 - 2 2 - 3 3 - 1 4 - 5 5 - 6 6 - 4
Voltage 345 Vac 360 Vac 217 Vac 130 Vac 170 Vac 144 Vac
CAPACITORS (52) AND (53) WHILE CUTTING TEST.
Terminals of transformer (38) = voltages according to the table, with transfer arc.
Terminals of transformer (38) 1 - 2 2 - 3 3 - 1 4 - 5 5 - 6 6 - 4
Voltage 350 Vac 283 Vac 218 Vac 77 Vac 72 Vac 74 Vac
NOTE
The values shown in the table are merely indicative, with a rather broad tolerance, due to the
tolerances of the capacitors and how the transformer (38) is made.
Correct?
YES
NO
♦Check the wiring between the capacitors (52) and (53) and terminals 1 and 2 of
the primary circuit of the transformer (38), considering that every connection
other than the one shown in the diagram is to be considered mistaken, and may
cause further damage to the components of the power source.
♦Make sure that the capacity of the capacitors is correct; (52) = 3 x 60 uF and (53)
= 1 x 30 uF, using a specifically designed instrument “RLC Bridge”, or, if not
available, replace the capacitors (52) and (53).
♦Check the condition of the windings of transformer (38), especially making sure
that there are no signs of overheating or dents in the winding columns that may
lead to partial short-circuits in the turns. If necessary, replace the transformer (38).
♦Regular operation.
3.302.230 02/05/2007

63
Art. 962

62
La richiesta di pezzi di ricambio deve indicare sempre: numero di arti-
colo, matricola e data di acquisto della macchina, posizione e quantità
del ricambio.
pos DESCRIZIONE DESCRIPTION
01 LATERALE SINISTRO LEFT SIDE PANEL
02 COPERCHIO COVER
03 COPERTURA GOMMA RUBBER MAT
04 CIRCUITO DI CONTROLLO CONTROL CIRCUIT
05 PIANO INTERMEDIO INSIDE BAFFLE
06 ELETTROVALVOLA SOLENOID VALVE
07 ELETTROVALVOLA SOLENOID VALVE
08 PRESSOSTATO PRESSURE SWITCH
09 FONDO BOTTOM
10 RIDUTTORE REGULATOR
11 MANOMETRO GAUGE
12 PROTEZIONE PROTECTION
13 PRESSACAVO STRAIN RELIEF
14 CAVO RETE POWER CORD
15 LATERALE DESTRO RIGHT SIDE PANEL
16 ASSALE AXLE
17 RUOTA FISSA FIXED WHEEL
18 TAPPO CAP
19 RUOTA PIROETTANTE SWIVELING CASTOR
20 PANNELLO ANTERIORE FRONT PANEL
21 PRESSACAVO STRAIN RELIEF
22 LAMPADA SPIA LIGHT
23 CORNICE FRAME
24 DISCO CAMBIATENSIONE LOCKING DISC
25 PORTA LAMPADA LAMP HOLDER
26 PORTA LAMPADA LAMP HOLDER
27 PORTA LAMPADA LAMP HOLDER
pos DESCRIZIONE DESCRIPTION
28 MANICO HANDLE
29 PANNELLO COMANDI COMP. COMPLETE CONTROL PANEL
30 SUPPORTO MORSETTIERA TERMINAL BOARD SUPPORT
31 MORSETTIERA TERMINAL BOARD
32 TELERUTTORE CONTACTOR
33 RADDRIZZATORE RECTIFIER
34 MOTORE MOTOR
35 SUPPORTO MOTORE MOTOR SUPPORT
36 RESISTENZA RESISTANCE
37 VENTOLA FAN
38 TRASFORMAT. DI POTENZA POWER TRANSFORMER
39 CONNESSIONE CONNECTION
40 COMMUTATORE SWITCH
41 CAVO TORCIA TORCH CABLE
42 IMPUGNATURA CON HANDGRIP WITH PUSHBUT
PULSANTE TON
43 ANELLO O.R. O.RING
44 DIFFUSORE DIFFUSER
45 CORPO TORCIA (TESTINA) TORCH BODY (HEAD)
46 ELETTRODO (CONF. DA 5 PZ.) ELECTRODE (PACK. 5 PCS.)
47 DIFFUSORE ISOLANTE SWIRL RING (PACK 2 PCS.)
(CONF. DA 2 PZ.)
48 UGELLO (CONF. DA 10 PZ.) NOZZLE ( PACK. 10 PCS.)
49 PORTAUGELLO NOZZLE HOLDER
50 TORCIA COMPLETA COMPLETE TORCHE
51 MORSETTO + CAVO SCREW KNOB + CABLE
52 CONDENSATORE CAPACITOR
52 CONDENSATORE CAPACITOR
When ordering spare parts please always state the machine item and
serial number and its purchase data, the spare part position and the
quantity.