System Application

TM 11-6130-377-14

(3) The 12-volt shunt regulator consisting of

1973 model

1974 model

A1A2C3

A1A2C18

transistor A1Q1 and resistor A1R2 and associated

A1A2C6

A1A2C20

circuitry is included only in the 1973 model inverter.

A1A2C14

A1A2C17

(4) The 1974 model inverter is protected

A1A2C15

A1A2C16

against normal overload, input overvoltage and input

A1A2C18

A1A2C27

undervoltage by circuit breaker A1CB1 ((1) above).

A1A2CR2

A1A2CR3

When circuit breaker A1CB1 is initially closed (inverter

A1A2CR8

A1A2CR4

A1A2CR12

A1A2CR5

turn-on), capacitor C25 and resistor R28 prevent arcing

A1A2CR14

A1A2CR1

across open contacts 1 and 2 of A1CB1. When A1CB1 is

A1A2CR15

A1A2CR2

opened, to turn off the inverter, contacts 1 and 2 of

A1A2Q12

A1A2Q9

A1CB1 close and allow capacitors A1C1 and A1A1A2C25

A1A2Q17

A1A2Q10

to discharge in less than 5 seconds.

A1A2Q20

A1A2Q4

A1A2Q21

A1A2Q5

1-9. System Application

A1A2Q22

A1A2Q11

The inverter can be utilized in two functional

A1A2R8

A1A2R29

configurations: when the inverter is operated as a single

A1A2R11

A1A2R30

unit (non-parallel) or when the inverter is connected for

A1A2R14

A1A2R31

A1A2R15

A1A2R32

parallel operation of two units.

These functional

A1A2R29

A1A2R36

configurations are described fully in Functioning of

A1A2R30

A1A2R37

Equipment contained-in chapter 5.

A1A2R31

A1A2R38

A1A2R51

A1A2R11

1-10. Technical Characteristics

A1A2R52

A1A2R10

Input:

A1A2R54

A1A2R46

Voltage........................... 104 to 141 vdc (110 vdc nominal)

A1A2R55

A1A2R12

Circuit Breaker ............... 70 Amperes

A1A2R57

A1A2R14

Protection....................... Reverse polarity Low voltage

A1A2R58

A1A2R13

sensor opens input circuit

A1A2R59

A1A2R18

breaker at 95 0.5 vdc

A1A2R60

A1A2R17

High voltage sensor opens input

A1A2R61

A1A2R47

circuit breaker at 142 0.5 vdc

A1A2R62

A1A2R48

Isolation: 500 vac RMS, input to

A1A2U2

A1A2U8

output, input to chassis, output

A1A2U7

A1A2U9

to chassis

A1A2U9

A1A2U4

Output:

NOTE

Voltage........................... 120 vac RMS 5%, no load to full

Many components used in the 1974

load, available within 5 seconds

models are also used in the 1973

after turn-on

models. These components may be

Circuit Breaker ............... 60 Amperes

identical in function and reference

Protection....................... Output is current limited at 44

amperes into short circuit

designation (that is T1, J1, DS1, etc) or

Frequency ...................... 60 Hz 0.25%, single phase,

may

identical

only

sinusoidal

characteristics (that is 0.1 uf, 12 vdc

Power............................. Single inverter, 5000 VA (overload

capacitors are used in many locations

up to 6250 VA)

in both models). Fuse A1F1 is in the

Two parallel inverters, 10,000 VA

1973 model only.

(overload up to 12,500 VA)

Harmonic Distortion........ Less than 5% at full load, nominal

b. Circuit Differences.

input

(1) The input shunt circuit differs between

Power Factor .................. 0.8 lagging to 0.8 leading

models. Relay A1K1 and associated circuitry is included

Efficiency ....................... 75% at full load, nominal input

only in the 1973 model inverter. In the 1974 model,

Environment:

sensor circuits on inverter drive board A1A1A2 control

Temperature................... 0oC (32oF) to 55oC (131oF)

and shunt trip coil activation and A1CB1.

operating, -40oC (-40oF) to

85oC (185oF) nonoperating

(2) The soft start circuit consisting of A1Q2 and

Humidity......................... 95%, non-condensing

associated circuitry, including relay A1K3, is included only

in the 1973 model inverter.

Change 1

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