Section II. DESCRIPTION AND DATA

TM 11-6130-377-14

Commander, US Army Communications and Electronics

DAAB07-74-C0465.

Inverters procured

Materiel Readiness Command, ATTN: DRSEL-ME-MQ,

under the 1973 contracts differ from

Fort Monmouth, NJ 07703. We'll send you a reply.

those procured under the 1974 contract.

These differences are internal and do not

NOTE

affect overall equipment interchange-

Inverters covered in this manual were

ability.

Refer to paragraph 1-8.1 for

procured under Contract Numbers

specific differences.

DAAB07-73-C-0233, DAAB07-C0327, and

Section II. DESCRIPTION AND DATA

located inside the inverter and the cables from external

1-7. Purpose and Use

equipment must be routed to their respective terminal

The inverter (fig. 1-1) is a general purpose, direct current

boards through openings in the rear panel of the inverter.

(dc) to alternating current (ac), static inverter which

Fan openings (figs. 2-1 and 3-1) are provided in the front

provides a 120-volt alternating current, 60 Hz, 50

indicator panel and the right side panel to enable cooling

amperes (5 kW) power source for use in those locations

air to be drawn in and exhausted to maintain operating

where the primary power source is 110 volts direct

temperatures within the inverter.

current. Two inverters can be connected in parallel to

c. The Master/Slave cable assembly (Deltec Part

provide twice the power output, 100 amperes (10kW), if

No. 5122418) is used between two inverters when they

required.

are operated in parallel (para. 2-4).

1-8. Description

1-8.1. Differences in Models

a. The basic functional entities of the inverter (fig. 1-

Front panel markings of the inverters differ only in item

2) are the input filter, inverter drive, silicone controlled

identification on the nomenclature plate (lower left corner)

rectifier (SCR) inverter, and the ferroresonant transformer

and across the front panel. The 1973 model front panel

and filter. The input filter attenuates noise such that the

marking is: STATIC INVERTER MODEL DI-5003-259; the

inverter does not introduce noise back onto the input dc

1974 model marking is: INVERTER, POWER, STATIC

line. The inverter driver operates the SCR inverter at a

PP-7078/U. Wiring differences between models are

frequency of 60 Hz which in turn, operates in a square

indicated in figures FO-1 and FO-1.1. Inverter drive

wave mode to drive the ferroresonant output transformer.

circuit board A1A1A2, Part Number 5122348, is contained

The ferroresonant transformer and filter provide a 120-

in the 1973 model; Part Number 5123023 is contained in

volt, 60-Hz sine wave output, with voltage regulation,

the 1974 model. Differences in reference designations of

current limiting, and harmonic suppression.

identical components (electrical) are indicated in a below.

Other differences are indicated in b below.

a. Reference Designation Differences.

1973 model

1974 model

A1C2

A1C1

A1C3

A1C2

A1C4

A1C3

A1CR5

A1CR3

A1CR6

A1CR4

A1CR7

A1CR5

A1K4

A1K1

A1L3

A1L4

A1L5

A1L3

Figure 1-2. Simplified block diagram.

A1Q3

A1Q1

A1Q4

A1Q2

b. The front indicator panel of the inverter is hinged

A1R6

None

on the left side and can be opened to gain access to the

A1R9

A1R2 and A1R3

various internal components and the terminal boards.

A1A2C2

A1A2C26

Mounted on the panel are the operators' controls and

instruments. The input/output terminals (fig. 2-1) are

Change 1

1-3