Biddle MEGGER - Page 16

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Connections

for

testing

the

insulation

resistance

of

a

motor,

starting

equipment

and

connecting

lines,

in

parallel.

Note

that

the

starter

switch

is

in

the

“00”

position

for

the

test.

It

is

pref-

erable

always

to

disconnect

the

component

parts

and

test

them

separately

in

order

to

determine

where

weaknesses

exist.

2.

D-C

Generators

and

Motors

BRUSHES

LIFTED

OFF

COMMUTATOR

"MEGGER™

INSTRUMENT

FIGURE

9

With

the

brushes

raised—as

indicated—the

brush

rigging

and

field

coils

can

be

tested

separately

from

the

armature.

Like-

wise

the

armature

can

be

tested

by

itself.

With

the

brushes

lowered,

the

test

will

be

that

of

brush

rigging,

field

coils

and

armature

combined.

3.

Wiring

Installation

Connections

for

testing

to

ground

each

circuit

separately,

working

from

the

distribution

panel.

FIGURE

10

{141

“MEGGER™

INSTRUMENT

eh.