Ac1, Ac3, Ax, C-Load Specifications - ABB SA/S 12.16.6.1 Product Manual

®
ABB i-bus KNX
2.8 AC1, AC3, AX,
C-Load specifications
36 2CDC 505 056 D0207 | SA/S
Device technology
Example
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ABB i-bus ballast 1 x 58 CF
Peak inrush current I
p
For Switch Actuator SA/S 4.16.6.1 this results in:
maximum number of electronic ballasts/output = 600 A / 34 A = 17
electronic ballasts
This number has been limited to 12 electronic ballasts in conjunction with
a B16 miniature circuit breaker. If more electronic ballasts are connected,
the miniature circuit breaker may trip during switch on.
For Switch Actuator SA/S 4.6.1 this results in:
maximum number of electronic ballasts/output = 200 A / 34 A = 5
electronic ballasts
In Intelligent Installation Systems, different switching capacity and
performance specifications that are dependent on the special application
have become established in industrial and residential systems. These
performance specifications are rooted in the respective national and
international standards. The tests are defined so that typical applications,
e.g. motor loads (industrial) or fluorescent lamps (residential), are simulated.
The specifications AC1 and AC3 are switching performance specifications,
which have become established in the industrial field.
Typical application:
AC1 – Non-inductive or slightly inductive loads, resistive furnaces
(relates to switching of resistive loads, cos ϕ = 0.8)
AC3 – Squirrel-cage motors: Starting, switching off motors during running
(relates to (inductive) motor load, cos ϕ = 0.45)
AC5a – Switching of electric discharge lamps
These switching performances are defined in the standard EN 60947-4-1
Contactors and motor-starters - Electromechanical contactors and motor-
starters.
The standard describes starters and/or contactors that were previously
preferably used in industrial applications.
The designation AX has established itself in the field of building engineering.
AX relates to a (capacitive) fluorescent lighting load.
Switchable capacitive loads (200 μF, 140 μF, 70 μF or 35 μF) is referred to in
conjunction with fluorescent lamp loads.
This switching capacity refers to the standard EN 60669 Switches for
household and similar fixed electrical installations, which deals primarily with
applications in building engineering. For 6 A devices a test with 70 μF is
demanded, and for devices exceeding 6 A a test with 140 μF is demanded.
= 33.9 A (147.1 μs)