CEBORA S.p.A.
15
3.302.155
22/01/04
Correct?
3.3.7
- In resistive load operation, the output voltage is not regular.
NOTE
Only the tests loaded at the maximum output voltage are described below, and thus at the
maximum current of the power source, since it is assumed that the OPEN CIRCUIT
OPERATION TEST in par. 3.3.6. has been successfully completed, and thus the connections,
turns ratio and operation of the transformer (30) are all assumed correct.
OUTPUT VOLTAGE TEST ON RESISTIVE LOAD.
q
Output terminal (G) power source (-) and output terminal (H) power source (+) = direct
current values as shown in the table, with start button pressed.
Power
Source
Art.
Position
switch 50
Position
switch 51
Resistive load
resistance
Power source
output current
(Adc)
Power source
output voltage
(Vdc)
574
7
-
0.143 ohm
150
+21.5
575
7
-
0.132 ohm
170
+22.5
591
6
2
0.12 ohm
200
+24
593
6
2
0.1 ohm
250
+26.5
NO
YES
♦
Regular operation.
♦
Make sure the connections of the primary circuit of the transformer (30) to the switches (50)
and (51) and the voltage change terminal board (29) (where present) are intact. If you find
loose connections, tighten them and replace any components with damaged terminals.
♦
Check the efficiency of switches (50) and (51), especially make sure there are no signs of
burned or misshapen contacts. If necessary replace the defective switch.
♦
With the power source off and unplugged, check the efficiency of the contacts of contactor
(47), tripping it manually and checking whether the resistance on each contact is
approximately 0 ohm. If you find burnt contacts or have difficulty moving the mobile
equipment, replace the contactor (47).
♦
Check the wiring between the secondary circuit winding of transformer (30) and rectifier
bridge (24). If you find loose connections, tighten them and replace any components with
damaged terminals.
♦
Check the efficiency of the rectifier bridge (24).
♦
Make sure the connections between the negative terminal of rectifier bridge (24), choke (49)
(where present), polarity inverter (61) (where present), and output terminal (-) (G) of the
power source are intact, as well as between the positive terminal of rectifier bridge (24),
polarity inverter (61) (where present), and central torch adapter (H) (+). If you find loose
connections, tighten them and replace any components with damaged terminals.
♦
Replace the transformer (30).
