MicroVersaTrip Plus™ and MicroVersaTrip PM™ Trip Units
Chapter 5. Maintenance and Trouble-Shooting
34
W
W
W
WA
A
A
AR
R
R
RN
N
N
NIIIIN
N
N
NG
G
G
G:::: Always de-energize Type AKR circuit
breakers before attempting to remove or replace the
Trip Unit. Because of the exposed location of the
Trip Unit, failure to observe this warning may result
in equipment damage or personal injury, including
death.
A
A
A
AT
T
T
TT
T
T
TE
E
E
EN
N
N
NT
T
T
TIIIIO
O
O
ON
N
N
N:::: Deconneter le disjoncteur de type
AKR de toute tension avant d’enlever ou remplacer
le déclencheur. L’emplacement du déclencheur
étant proche de parties sous tension, le non respect
de cet avertissement peut entrainer des
endommagements du matériel, et des blessures
pouvant être mortelles.
5-2 Rating Plug Removal and
Replacement
C
C
C
CA
A
A
AU
U
U
UT
T
T
TIIIIO
O
O
ON
N
N
N:::: Removal of the rating plug while the
breaker is carrying current reduces the breaker’s
current-carrying capacity to approximately 25% of
the current sensor rating.
A
A
A
AT
T
T
TT
T
T
TE
E
E
EN
N
N
NT
T
T
TIIIIO
O
O
ON
N
N
N:::: Si le calibreur est retiré le disjoncteur
et traversé par un courant, le niveau de protection
s’ajuste à approximativement 25% du calibre du
transformateur d’intensité.
Interchangeable rating plugs are removed with a
Rating Plug Extractor, Catalog No. TRTOOL.
(Suitable equivalents are commercially available as
“integrated circuit (DIP) extractors.”) Grasp the rat-
ing plug tabs with the extractor and pull the plug out
as illustrated in Figure 66. Be sure to grab the tabs
and not the front cover of the rating plug, or the
plug may be damaged.
Figure 66. Removing the interchangeable rating plug.
Rejection features are provided on all rating plugs to
prevent application mismatches. Never force a rating
plug into place. Refer to Chapter 1 to find the
appropriate rating plugs for each sensor rating and
breaker frame.
If a replacement rating plug has a different rating
than the plug that was removed, follow the appropri-
ate setup procedure in Chapter 2 to enter the new
rating.
Do not attempt to use a rating plug from a Spectra
RMS™ breaker or a MicroVersaTrip RMS-9/MVT-4
function trip in a MicroVersaTrip Plus or Micro-
VersaTrip PM Trip Unit.
5-3 Trouble-Shooting Guide
The following guide is provided for trouble-shooting
and isolating common problems. It does not cover
every possible condition. Contact the Customer
Support Center at 800-843-3742 if the problem is not
resolved by these procedures.
