Chapter 2. OPERATING INSTRUCTIONS - TM-5-6625-2691-13-P0020

TM 5-6625-2691-13&P

CHAPTER 2

O P E R A T I N G INSTRUCTIONS

WARNING

If equipment fails to operate, refer to

troubleshooting procedures in Chapter

Section I. OPERATING PROCEDURES

2-1. General

(2.4 meters). This is the preferred device which is avail-

able in the Army supply system.

a. The instructions in this section are published for

the information and guidance of the personnel respon-

(b) Drive aground pipe, inch (1.9 centimeters),

sible for the operation of the test set.

copper or steel, to a depth of at least 8 feet (2.4 m). An

existing underground pipe may be used in an emergen-

b. The operator must know how to perform every

operation of the test set. This section gives instructions

cy.

on the various controls and instruments, starting and

(c) Bury a inch thick (.6 cm) iron or steel plate,

stopping the test set and detailed operating instruc-

approximately 18 x 18 inch (45.7 x 45.7 cm) size, with

tions. Installation or setting-up instructions are also in-

ground cable attached, to a depth of at least 4 feet (1.2

eluded. Since nearly every job presents a different

m).

problem, the operator may have to vary the given pro-

(d) Bury a

inch thick (.2 cm) aluminum or

cedures to fit the individual job.

copper plate approximately 18x18 inch (45.7 x 45.7 cm)

size, with ground cable attached, to a depth of at least 4

2-2. Installation of Separately Packed Com-

feet (1.2 m).

ponents

(e) Position a inch thick (.6 cm) iron or steel

There are no separately packed components with the

plate, or

inch thick (.2 cm) aluminum or copper

test set; it is shipped complete.

plate, approximately 18 x 18 inch size, on the hard

2-3. Installation or Setting-Up Instructions

ground or bedrock beneath the trailer stand, or roll the

a. Location The unit must be located in an area with

wheel of a trailer or truck until it comes to rest on top

sufficient air circulation and space so that proper ven-

of the grounding plate.

tilation can be achieved.

(f) Saturate the area around the grounding

b. Outdoor Installation. Measures for weather pro-

device with water to increase conductivity.

tection should be taken by the operating agency, de-

(2) Ground cables should be copper. Braided cable

pending on the climate. It is recommended that all

is best, but No. 6 AWG gage (or larger) copper wire will

doors be closed when not in use.

suffice.

c. Indoor Installation. It is recommended that the

(3) Connect the ground cable from the grounding

unit be set up in an area with sufficient ventilation

device to the generator set frame ground stud (fig. 1-3)

which is free of oil contaminants or corrosive at-

and tighten the nut securely.

mospheres. Keep clear of hazardous electrical connec-

CAUTION

tions or foreign wires. The test set should be set up in

Do not rely on ground or safety devices

level position.

to prevent accidents. Electrical cir-

d. Grounding

cuits and equipment are potentially

WARNING

hazardous. Personnel should always

Generator sets shall be grounded in

exercise caution to prevent injury or

order to prevent shock due to defective

possible death due to electrical shock.

insulation, or external electrical

2-4. Controls and Instruments

faults. Poor grounding can endanger

Located on the control panel (fig. 2-1) are a master

personnel, may damage equipment,

switch, four load switches, voltage selector switch and

and can create interference in com-

a variable load control. They provide all the necessary

munication or electronic circuits.

controls for proper operation of the unit. The purpose of

(1) Install one of the following items as a ground-

ing device:

the controls and normal adjustments are illustrated in

figures 2-1 and 2-2.

(a) Drive a ground rod to depth of at least 8 feet

2-1