Circuit Analysis (PP-1660B/G)

TM 11-6130-227-40

K3(K2) to the negative terminal of rectifier CR2. the

to the negative terminal of rectifier CR1.

other circuit is from the positive terminal of rectifier

2-3. Circuit Analysis (PP-1660B/G)

CR1, through contacts 3-4 of relay K5(K4) and

ammeter M2 to positive battery connector P3,

a. AC Input Circuit. One side of the nominal 115

through

the

battery

under

charge

negative

v o l t ac input is connected by means of plug con-

b a t t e r y connector P2, and through circuit breaker

n e c t o r P1 and the ac input cable, through POWER

CB2 to the negative terminal of rectifier CR1.

SWITCH S3 and either TIME SWITCH M1 or

(3) 24-volt charging. W h e n B A T T E R Y V O L T S

r e a c t o r L1 to CHARGE SWITCH S1; the other side

switch S2 is in the 24 position, relay K4(K3) is

of the ac input is connected through POWER

energized. The energizing circuit is from center tap

SWITCH S3 to terminal 5 of transformer T1. DS1 is

10 of winding 9-11 of transformer T1, through

a green neon lamp used to monitor the ac input.

BATTERY VOLTS switch S2 in the 24 position,

TIME SWITCH M1 and CHARGE SWITCH S1

through the coil of relay K4(K3) to the negative

operation is the same as described for PP-1660/G.

terminal of rectifier CR2. When relay K4(K3) is

b. Transformer T 1 C i r c u i t s . E x c e p t f o r t h e

operated, a full-wave rectifier circuit, using rec-

blower circuits transformer T1 circuits are the same

tifiers CR1 and CR2 connected in series, is

as described for PP1660/G. Blower motor B1 is

e s t a b l i s h e d . This arrangement provides a dc output

connected directly across the ac input. Power is

o f approximately 26 volts at 40 amperes maximum.

applied through POWER SWITCH S3 and an in-

terlock FAN SAFETY SWITCH S4.

This circuit is from the positive terminal of rectifier

c. R e c t i f i e r C i r c u i t s . S a m e a s d e s c r i b e d f o r

C R 1 , through contacts 4-3 of relay K4(K3) to the

PP-1660/G.

negative terminal of rectifier CR2, through rectifier

d. Switching Circuits.

6 volt charging circuit does

CR2 to its positive terminal, through circuit breaker

n o t use relay K1, (K6), all other functions are as

C B 3 and ammeter M2 to positive battery connector

P 3 , through the battery under charge to negative

described

for

PP-1660/G.

b a t t e r y connector P2, through circuit breaker CB2

2-5