Electrical Test Instruments MAC-20 User Manual

Electrical Test lnstruments MAC-20 Retrofit Package
Section lll
-
Operating lnstructions
6. Ground the Main Control Unit to the Output
Unit with the supplied
ground
cable
(lf
applicable).
''
7. Connect the two
power
cables between the Main
Control Unit and the Output
Unlt, observing
polarity
(lf
applicable).
8. Connect the
interconnecting control cable between the
Main
Control
Unit and the
Output
Unit
(lf
applicable).
9.
Make
sure that the controls
on
the test
set
are
adjusted as follows:
a)
Main Power
Switch
(Circuit
Breaker): OFF
b) Output Tap Switch: 1
(lowest
tap)
c) Output Control Vernier: 0
(minimum
position)
10. Remove rear access cover of Main Control Unit,
(lf
applicable), to be sure input
tap
matches
supply
voltage. Replace
panel.
Failure to set input voltage tap
properly
could cause a serious accidental overvoltage
and DAMAGE TO TEST SET OR
INJURY TO OPERATOR COULD
RESULT.
11. lf
possible,
TURN OFF
power
at source.
12. Connect
power
source to input of Main Control Unit, using
connectors supplied.
13.
lf Remote lnitiate Cable will be used,
install NOW, before
power
is turned on.
14. Turn on
power
at source, if turned off in step
11 above.
15. Connect breaker
under test to appropriate output tap,
using stabs or cables as
required.
16. Make sure that
breaker is CLOSED.
17. Turn Main Power Switch
(Circuit
Breaker) ON.
18. lf everything
is
OK,
POWER ON and TRIP
(or
output OFF) lights will
glow,
INTERLOCK indicators
will be OFF, and the
MAC-20 will
perform
its
power
on se-
quence.
19.
Follow
Step-by-Step
procedures
below, as required,
for
testing.
20.
When tests are completed,
turn
TAP
SWITCH
to
'1
,
VERNIER to 0, and
MAIN
POWER switch
OFF.
21
. Turn off supply
power,
if
possible,
and disconnect
input
power
cables.
22. Remove
interconnecting
power
and control
cables
(lf
applicable).
23.
Remove
interconnecting
ground
cable
(lf
applicable).
24.
Remove
ground
cable
from Main Control
Unit to earth
ground.
25.
lf unit is to be transported,
under rough conditions,
remove MAC-20 and
carry
seParatelY.
Copyright(C)'1994-1998
Electric€l
Test lnstruments, lnc.
All Rights Reserved
Page
lll-2

Electrical Test Instruments MAC-20 Specifications

General

Brand	Electrical Test Instruments
Model	MAC-20
Category	Controller
Language	English