Secondary Disconnect; Isolation Shutters; Profibus Or Modbus Communications; Dual Key Breaker Locking - Siemens ETU745 Application Manual

WL Circuit Breaker

Factory Installed Options

The following items are available for WL cradles. Items are
described to highlight the functional characteristics of these
factory installed cradle options.
Secondary disconnects
Secondary disconnects are used to interconnect external breaker
control and signaling circuitry to the WL breakers factory wired
circuitry. Three types of external connection terminals are
available. 1. Screw connection, 2. Tension spring connection
and, 3. Ring lug connection. Tension spring connection terminals
are standard for fixed mounted breakers.
Characteristics table
Wire connection type
Secondary Screw compression
disconnects Tension spring compression
Ring lug terminal

Isolation shutters

When removing a draw-out breaker from its connected position
the primary contacts become exposed and more accessible to
personnel in the breaker compartment. Isolation shutters reduce
that accessibility to the primary terminals by automatically
closing the access ports to the primary terminals whenever
the breaker is disconnected or withdrawn. After removal of the
breaker from its compartment, the shutters may be padlocked
to inhibit manual shutter opening while breaker is not in
the compartment.
1 See page 85 for field install part numbers.
WL Circuit Breaker Selection and Application Guide
Courtesy of NationalSwitchgear.com
1
Number of wires and sizes
1 x 14AWG or 2 x 16AWG
2 x 14AWG
2 x 14AWG or 2 x 16AWG
PROFIBUS or MODBUS communication
PROFIBUS or MODBUS communication requires a COM15 or
COM16 converter to transmit WL breaker data to external PCs
or PLC monitoring systems. External communication connection
to either module is through a DB-9F connector.
Characteristics table
Operating voltage
Peak inrush current
Max. continuous current
Ambient temperature

Dual key breaker locking

For draw-out breakers, a cradle-mounted breaker lockout device
can be installed with either one or two independent key cylinders.
The key is removable only when the breaker is locked open.
Cradle-mounted key locks are commonly utilized for interlocking
in open transition schemes, where paralleling certain sources is
not desirable. Siemens offers the choice of unique, uncoordinated,
Kirk and Superior key lock types. If a custom, coordinated key/
cylinder is required, order the lock provision-only. The lock cylinder
and matched key must then be ordered separately from the
respective lock manufacturer.
The compatible Kirk cylinder lock part number is C-900-301.
The compatible Superior cylinder lock part number is C-900.
24VDC
280mA
125mA
-25 to 70ºC
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