Biddle MEGGER - Page 30

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To

measure

the

terminal

(Earth

to

Line)

voltage,

use

an

electrostatic

voltmeter.

Do

not

try

to

use

a

low

resistance

volt-

meter

because

the

ballast

resistance

R’

in

Figure

45

will

cause

the

voltmeter

to

read

in

error.

An

approximation

of

the

generator

voltage

can

be

made

by

using

a

voltmeter

of

known

high

resistance

connected

to

the

Earth

and

Guard

terminals

on

those

instruments

equipped

with

Guard

terminals.

Lubrication

and

Repairs

In

hand-driven

“Megger”

Insulation

Testers,

all

bearings

are

packed

with

lubricant

and

ordinarily

do

not

need

attention

for

a

long

time.

Directions

for

lubricating

motor-driven

“Meg-

ger”

instruments

are

given

on

page

6.

After

several

years

of

normal

use,

instruments

should

be

returned

to

us

for

inspection

and

such

servicing

as

may

be

necessary.

We

repair,

rebuild

and

service

all

types

of

our

“Megger”

instruments,

and

strongly

advise

that

they

be

sent

to

us

for

the

purpose.

A

report

of

condition,

together

with

estimate

of

cost,

will

be

submitted

upon

request.

Reconditioned

instruments

are

returned

to

the

user

in

condition

practically

equal

to

new.

Instruments

for

repair

or

servicing

should

be

packed

care-

fully—surrounded

by

at

least

three

to

four

inches

of

excelsior—

and

forwarded,

properly

insured

and

with

shipping

charges

prepaid,

to

James

G.

Biddle

Co.,

Township

Line

&

Jolly

Roads,

Plymouth

Meeting,

Pa.

19462,

together

with

full

information

as

to

the

owner

and

what

is

desired.

Note:

When

writing

in

regard

to

instruments

for

servicing

or

repair,

please

give

serial

number.

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