CPC 100
V 3.20
Preface - 4
Preface
Changing Fuses
►
Turn off the
CPC 100
, unplug the power cord and/or press the Emergency Stop button.
►
We recommend to wait for about 30 seconds. This time is necessary for the internal
electrolytic capacitors to fully discharge.
►
Ground the test object, and disconnect it from the
CPC 100
. By disconnecting it, you prevent
a possibly faulty test object feeding power back into the
CPC 100
.
►
Locate the blown fuse on the front panel of the
CPC 100
, and replace it.
Note:
Replace with identical fuse type only (refer to the chapter “Changing Fuses” of the
CPC 100 Reference Manual available in PDF format on the
CPC 100 Toolset
CD-ROM or the
CPC 100
Start Page
).
DC Output to Test Objects with a High Inductance
Use test cards
RWinding
(winding resistance) and
TRTapCheck
(tap changer winding
resistance and on-load tap changer interruption check) only:
If a test object with a big inductance was connected to the
CPC 100
, short-out the test object
additionally before disconnecting it from the
CPC 100.
CPC 100
in Combination with the
CP TD1
The
CP TD1
is an optionally available high-precision test system for on-site insulation tests of
high-voltage systems like power and measuring transformers, circuit breakers, capacitors and
isolators. The
CP TD1
works as an add-on device to the
CPC 100
and is described in chapter
”CP TD1” of this User Manual.
On principle, the safety instructions that apply to the
CPC 100
and its accessories also apply to
the
CP TD1
. However, the
CP TD1
requires some additional precautions and measures. They
are listed in chapter ”CP TD1” on page CP TD1-1.
Different Symbols for PE
The
CPC 100
and
CP TD1
use different symbols for protective earth (PE):
This is due to a new standard and does not symbolize any functional difference.
Note:
Both symbols mean exactly the same, i.e., protective earth (PE) or equipotential ground.
DANGER
Death or severe injury caused by high voltage or current
►
Never connect or disconnect test objects and/or cables as long as the on-screen
message “Switch off in progress” is displayed.
►
Connect the
CP SA1
discharge box to the
V DC
input sockets when using the
400A DC
output to protect yourself and the
CPC 100
from high-voltage hazards.
►
Use separate clamps for current and voltage connections on both sides of the test
object to avoid hazards in case one clamp falls off during the test.
The message
Switch off in progress
notifies you that, after the
CPC 100
was switched off, the connected external inductance
(i.e., the test object) still “feeds” voltage potential back into the
6A DC
or
400A DC
output.
The existence of this voltage potential at the
6A DC
output is
also indicated by a lit LED - even if the
CPC 100
is switched off.
If a test object with a big inductance is connected to the
CPC 100
, ground the test object on both ends before
disconnecting it from the
CPC 100.
