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Section II. DESCRIPTION AND DATA
Up
TM-11-6130-377-14 Inverter Power Static PP-7078/U Manual
Next
Items Comprising an Operable Equipment
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
be
identical
only
in
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
1-4

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