TM11-6130-227-40
THEORY
115-volt ac input is connected through current-
limiting reactor L1 to the primary winding of trans-
former
T1.
Transformer
T1
has
two
separate
NOTE
s e c o n d a r y windings. The output of one is connected
All
reference
designations
within
(
)
to rectifier CR1, and the output of the other is
pertain to the components
of
the
connected to rectifier CR2. The fullwave direct-
PP-1660A/G and PP-1660B/G.
c u r r e n t (dc) outputs of rectifiers CR1 and CR2 are
During fast charging,
the contacts of TIME
switched by relays K2-K6 (K1K5) into series or
S W I T C H M1 are closed and the alternating-current
parallel combinations to provide the proper dc
a c input is applied directly to the primary winding
output voltages and currents for fast or slow-
of transformer T1. During slow charging, the
charging 6-, 12-, or 24-volt storage batteries.
contacts of TIME SWITCH M1 are open and the
Charger,
Battery
PP-1660/G,
Block
Diagram.
T1. Circuit breaker CB1 is a thermal type,
a u t o m a t i c reset circuit breaker rated at 5 amperes.
a. Ac Input Circuit. One side of the 105 to
C o n n e c t e d in series with reactor L1, it opens the
125-volt ac input is connected, by means of plug
input circuit to protect reactor L1 from overload
connector P1 and the ac input cable, through either
w h e n the input current exceeds this value. After a
TIME SWITCH M1 or reactor L1 to CHARGE
cooling period, circuit breaker CB1 recloses the
S W I T C H S1; the other side of the ac input is con-
i n p u t circuit automatically.
nected to terminal 5 of transformer T1. TIME
(2) Setting TIME SWITCH M1 to any time
S W I T C H M1 is a mechanically operated clock with
i n t e r v a l between 1 and 55 minutes closes its elec-
a normally open electrical contact.
trical contact and winds the clock mechanism,
(1) When TIME SWITCH M1 is in the SLOW
w h i c h holds the contact closed until the expiration
CHARGE position, its electrical contact is open.
of the time interval for which TIME SWITCH M1 is
T h e ac input then is connected through reactor L1
set. When the contact of TIME SWITCH M1 is
a n d circuit breaker CB1 to the rotor of CHARGE
closed, the ac input is connected directly to the rotor
S W I T C H S1 and the ac input circuit is completed
of CHARGE SWITCH S1 and the input circuit is
t h r o u g h the selected contact of CHARGE SWITCH
completed
through
the
selected
contact
of
S1 and the associated tap of the primary winding of
CHARGE SWITCH S1 and the associated tap of
t r a n s f o r m e r T 1 (b) below). Reactor L1 is a choke
the primary winding of transformer T1 (b) b e l o w ) .
that limits the input current applied to transformer
