TECHNICAL MANUAL "SE" (PBM753)
Revision no. 1 dd. 01/02/2017
P.B.M.
S.r.l.
via Barella, Z.I. - VIGNOLA ( MO ) ITALIA Tel. + 39 (059) 7705311 Fax + 39 (059) 7705300
http://www.gruppopbm.ite-mail :
file:
Manuale SE PBM753 GB rev.1.doc
page 16
•
If
strong vibrations
are heard during the charging process and the charging process is not performed
regularly because the cut-out-switch or the fuses operate,
it means that the bridge is in short-circuit and
it needs replacing.
•
On the other hand it is easy to diagnose the
open bridge
failure on a
three-phase charger
by operating
the charger without connecting the battery and forcing the power supply of the transformer. If an
anomalous transformer voltage, instead of a no-load voltage, is detected under these conditions, it means
that the rectifier bridge
is at least partially open and needs replacing.
•
As for
single-phase and
three-phase battery chargers
, the
no-load output voltage
corresponds to the
values contained in the following table (provided that transformer is correctly powered).
RATED BATTERY
VOLTAGE
NO-LOAD OUTPUT VOLTAGE (DC)
FOR A SINGLE-PHASE BATTERY
CHARGER
NO-LOAD OUTPUT VOLTAGE (DC)
FOR A THREE-PHASE BATTERY
CHARGER
12V
14 ÷ 15V
18 ÷ 24V
24V
28 ÷ 30V
33 ÷ 38V
36V
42 ÷ 44V
50 ÷ 58V
40V
46 ÷ 48V
60 ÷ 70V
48V
56 ÷ 58V
72 ÷ 80V
72V
85 ÷ 87V
100 ÷ 108V
80V
95 ÷ 98V
110 ÷ 120V
96V
112 ÷ 115V
130 ÷ 150V
CHAPTER 11 : MAINTENANCE AND CLEANING
All maintenance and cleaning processes have to be performed by qualified, skilled, and authorised
personnel.
•
Since the battery charger is an electrical equipment without any moving mechanical part, it does not need
any special maintenance.
•
It is however suggested to check, inspect, and clean the charger
at least once a year
if it operates in a
fairly “clean” environment.
•
In “hard” conditions, that is in dusty and wet environments, checks have to be performed
more frequently
.
The main checks to be performed are the following:
−
Place the charger/s outdoor and remove the closing panel.
−
Wear a faceplate and protection devices. Using compressed air, remove dust accumulated inside the
charger.
−
Use non-corrosive detergents to remove sludge deposits or other dirt.
Once the charger has been cleaned, perform the following actions:
−
Check the general condition of components and their integrity.
−
Replace oxidized cables and/or terminals, if any.
−
Use proper sprays to clean electrical contacts on contactors, switches, and commutators.
−
Check the tightening of screws and bolts, replace the rusted items, if any.
−
Perform a “dry cleaning” or use proper sprays to clean electronic cards.
−
Check the status of both control and power connectors. Check the “wear” of power connectors and
replace them, if necessary.
−
Check the condition of electrical plugs.
−
Once all the above-mentioned operations have been performed, close panels, doors and covers again,
and place the charger/s in its/their position/s again.