26
Siemens · 10/2014
General data
3WL Air Circuit Breakers
3WL air circuit breakers/non-automatic air circuit breakers up to 6300 A (AC), IEC
CubicleBUS modules
Digital output module with rotary coding switch
6 items of binary information concerning the state of the circuit
breaker (reasons for tripping and warnings) can be output via
this module to external signaling devices (e.g. LED, horn) or
used for the selective shutdown of other system components
(e.g. frequency converters).
Digital output modules are available in versions with and without
a rotary coding switch. On modules with a rotary coding switch
it is possible to choose between two signaling blocks each with
6 defined assignments and to set an additional response delay.
All the digital output modules are available as a version with
relay outputs (CO contacts, up to 12 A). Up to two modules
of this type can be connected to one 3WL circuit breaker.
Digital output module with rotary coding switch
Digital output module, configurable
The configurable output module is available for higher-perfor-
mance solutions. With this module, random events on the
CubicleBUS can be switched directly to one of six available
outputs or three of these outputs can be assigned with up
to six events. In other words, up to six events can be placed
on one physical output with OR operation. Either BDA Plus or
powerconfig are used for configuring.
A relay variant is also available here the same as for the output
modules with rotary coding switch. Only one module of this type
is possible per 3WL circuit breaker.
Digital output module, configurable
Analog output modules
The analog output module can be used to output the following
measured values to analog indicators in the control cabinet
door:
• I
L1
, I
L2
, I
L3
, I
N
or
• U
L12
, U
L23
, U
L31
, U
L1N
or
• P
L1
, P
L2
, P
L3
, S
tot
or
•p.f.
1
, p.f.
2
, p.f.
3
,
I % or
• f
avg
, U
LLavg
, P
tot
, p.f.
avg
Four 4-20-mA/0-10-V interfaces are available for this. The mea-
sured values to be output are selected with a rotary coding
switch. By using the analog output module it is possible to do
without additional converters and their conventional installa-
tion/wiring in the main current path. Up to two modules of this
type can be connected to one 3WL circuit breaker.
Analog output modules
Digital input modules
With the digital input module, up to 6 additional binary signals
(24 V DC) in the circuit breaker environment can be connected
to the system. It is thus possible for example to send messages
concerning the state of a switch disconnector or a control
cabinet door to the PROFIBUS DP/MODBUS.
With the digital input module on the CubicleBUS it is also
possible for the two different protection parameter sets held
in the ETU76B E trip unit to be switched over automatically
in a few milliseconds. It is thus possible, for example, to
automatically change the parameters of a coupling switch
should the transformer infeed fail.
One module each of this type can be used for holding the six
items of digital information and for automatically switching over
the parameters.
Digital input modules
ZSI module (short-time discrimination control)
The use of ZSI modules is recommended when Siemens circuit
breakers are arranged in several staggered levels but full
discrimination with the smallest possible delay is to be assured
nevertheless.
The circuit breakers are interconnected by these modules.
In case of a short-circuit, each affected circuit breaker
interrogates the circuit breakers directly downstream whether
the short-circuit has also occurred in the next, lower level.
The short-circuit is exactly localized as a result, and only the
next upstream circuit breaker in the energy flow direction is
switched off.
ZSI module (short-time discrimination control)
© Siemens AG 2015
To Next Page
Loading...
