Chapter 1. INTRODUCTION - TM-5-6625-2691-13-P0009

TM 5-6625-2691-13&P

CHAPTER 1

INTRODUCTION

Section I. GENERAL

1-1. Scope

priorities will be used in the destruction of essential

This manual is for your use in operating and main-

parts.

(a) Control panel assembly.

taining the electrical test set (load bank).

(b) Power absorbers.

1-2. Maintenance Forms and Records

Maintenance forms and records that you are re-

(d) Contactor.

quired to use are as follows:

(e) Rectifier.

a. DA Form 2404 (Equipment Inspection and Mainte-

(j) Frame.

nance Worksheet).

b. Demolition to Render the Equipment Inoperative.

b. DA Form 2407 (Maintenance Request Used for Re-

Use sledge hammers, crowbars, picks, axes or any other

questing Support Maintenance).

heavy tools which are available to destroy the unit.

c. DA Form 2407-1 (Continuation Sheet Used for Re-

c. Demolition by Explosive or Weapons Fire.

questing Support Maintenance).

(1) Explosives. Place 3 one-pound (.45 kg) charges

d. For further information, refer to TM 38-750, The

in the interior of the unit and detonate simultaneously.

Army Maintenance Management System (TAMMS).

(2) Weapons fare. Fire on the test set with the

1-3. Equipment Serviceability Criteria

heaviest practical weapons available.

(ESC)

d. Other Demolition Methods.

This equipment is not covered by an ESC.

(1) Scattering and concealment. Remove all easily

accessible parts and scatter them through dense

1-4. Destruction of Army Material to Pre-

foliage, bury them in the ground or submerge them in a

vent Enemy Use

lake, stream, or other body of water.

a. General

(2) Burning. Pack rags, clothing, or canvas inside,

(1) When capture or abandonment of the test set to

under and around the test set. Saturate this packing

an enemy is imminent, the responsible unit com-

with gasoline, oil or diesel fuel and ignite it.

mander must make the decision either to destroy the

(3) Submersion. Totally submerge the equipment

equipment or render it inoperative. Based on the deci-

in a deep body of water to provide water damage and

sion, orders are issued which cover the desired extent of

concealment. Salt water does greater damage to metal

destruction. Whatever method of demolition is

parts than fresh water.

employed, it is essential to destroy the same vital parts

(4) For further information, refer to TM 750-244-3,

of all test sets and all corresponding spare parts.

(2) When the lack of time or personnel prevents

Procedures for Destruction of Equipment to Prevent

complete destruction of the equipment, the following

Enemy Use.

Section II. DESCRIPTION AND DATA

1-5. Description

sting equipment. This is accomplished by applying

a. General. The electrical test set, either Model

various combinations of the resistive load incre-

A427 or Model A427B, is a portable, skid mounted

ments to simulate any output load. The load bank

resistive load unit. It is a completely self-contained

is designed to test the output characteristics of

generating plants rated at 120/208 and 240/416

unit mounted within a weather resistant enclosure.

Models A427 and A427B are electrically, operation-

volts, three phase, 4 wire; 120 or 240 volts single

ally and functionally identical to each other. Phys-

phase, 2 wire. The load bank can operate at fre-

ically, the overall envelop of the two models differ

quencies between 50 and 100 cycles per second.

only to the extent that Model A427B is provided

Input power terminals are supplied for connection

with specially designed skids and hand lifting bars.

of-power cables. Power cables are not supplied with

Model A427B stands 5" taller than Model A427

the equipment. The load bank can apply 0.5 to 3

for this reason. Many of the internal components

kilowatts variable load and 3, 6, 9, 12 KW fixed

are different and not physically interchangeable.

loads. When fixed and variable loads are applied in

The electrical test set, either

b. Capabilities.

combination, the load bank can supply any load

Model A427 (fig. l-l) or Model A427B, operates

from 0.5 to 33 kilowatts on either single or bal-

aas a loading and testing device for electrical gener-

anced three phase operation.

1-1

Change 1