Mounting; Trip Device; Model Number - GE AKR-30 Series Maintenance Manual

SECTION 2-General Description {Cont.)
2.4

MOUNTING

Type AKA breakers are designed for either drawout or
stationary mounting. Drawout breakers (See Fig.
equipped with features which make them easy to install in
or withdraw from their associated switchgear equipment.
These features are a racking mechanism (which facilitates
inserting and withdrawing the breaker unit) and primary
and control power disconnects which connect and part
automatically. Interlocking devices are included.
Stationary breakers are designed to be mounted on a
framework or panel, with mechanical fasteners being used
to secure the breaker frame and make power connections.
If control power connections are needed, a suitable termi­
nal board is supplied.
The mounting type is identified by the second middle
digit in the breaker's nameplate designation as follows:
AKA-5 (�0
Mounting type code letter per Table
TABLE 2 MOUNTING TYPE CODES
Code
Drawout
Letter
AKD-5
A
AKD-6
B
Substructure
D
AKD-8
Substructure
--
s
"1
s
1ct !413-lirl
-
FIG. 5 CERAMIC ARC CHUTES
8
4)
2
Breaker Type
Stationary
-
-
-
-
X
-
- I
2.5

TRIP DEVICE

There are 4 types of solid-state, direct-acting, self­
powered trip device systems associated with AKA break­
are
ers. These systems are for AC applications only. For DC
applications an electro-mechanical system is available.
The trip device system is identified by the first middle
digit in the breaker's nameplate designation as follows:
Trip device code number per Table 3
TABLE
CODE
NUMBER
2
EC
3
Power Sensor'
ECS
4
5 SST
6 MicroVersa Trip
'Power Sensor devices are discontinued. See publications
GEK-7309 and GEK-7301 for detailed servicing procedures
2.6 MODEL N U MBER
Type AKA breakers (see Table
of
number "-1" versions. For example AKA-5A-30H
AKA-5A-30H-1.
The difference between these models is their arc chute
construction. The arc chutes in the no model number break­
ers have a two piece porcelain frame and use
retainers, see Fig. 5. The "-1" breaker arc chutes have a
piece molded polyester glass frame and 1 arc chute re­
tainer, see Fig. 6.
All AKRTSOH breakers use only molded arc chutes.
.__.: _
_
FIG. 6 - MOLDED ARC CHUTES
3
TRIP DEVICE CODES
TRIP
DEVICE APPLICATION
as
2) exist either no model
. .
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..4 II t,q PI .... .. .. ._ _
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__ _
I er-:3
' -
DC
AC
AC
AC
AC
or
2 arc chute
one