Siemens SENTRON 3WL Reference Manual page 25

3WL Air Circuit Breakers/Non-Automatic Air Circuit Breakers up to 6300 A (AC)
CubicleBUS modules
Digital output modules 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 be
used for the selective shut-down 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 re-
lay outputs (CO contacts, up to 12 A). Up to two modules of this
type can be connected to one SENTRON 3WL.
Digital output module with rotary coding switch
Digital output modules, 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 out-
puts 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/BDA Plus or
Switch ES Power is 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 SENTRON 3WL.
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 , I , I , I or
L1 L2 L3 N
• U , U , U , U or
L12 L23 L31 L1N
• P , P , P , S or
L1 L2 L3 tot
Δ
• p.f. , p.f. , p.f. , I % or
1 2 3
• f , U , P , p.f.
avg LLavg tot avg
Four 4-20-mA/0-10-V interfaces are available for this. The
measured 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 SENTRON 3WL.
3WL Air Circuit Breakers
Analog output module
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 cabi-
net door to the PROFIBUS DP/MODBUS.
With the digital input module on the CubicleBUS it is also pos-
sible for the two different protection parameter sets held in the
ETU76B solid-state releases to be switched over automatically in
a few milliseconds. It is thus possible, for example, to automati-
cally 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 module
ZSI modules (short-time grading control)
The use of ZSI modules is recommended when Siemens circuit
breakers are arranged in several staggered levels but full gra-
ding with the smallest possible delay is to be assured neverthe-
less.
The circuit breakers are interconnected by these modules. In
case of a short-circuit, each affected circuit breaker asks the cir-
cuit breakers directly downstream whether the short-circuit has
also occurred in the next, lower level. The short-circuit is exactly
localized as the result, and only the next upstream circuit brea-
ker in the energy flow direction is switched off.
ZSI module (short-time grading control)
General data
Siemens · 2009 25