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Description of individual product variants

Position signaling switches

These auxiliary switches are capable of signaling a variety of states via electrical connections. The position signaling switch is available in only one version.

Applications:

  • Signal "Position of breaker in the draw-out unit"

  • Signal "Draw-out unit locked / open"

  • Signal "Plug-in unit - MCCB correctly bolted to plug-in socket"

The position signaling switches are changeover switches, i.e. they have three terminals:

Signal "Position of molded case circuit breaker in the draw-out unit"

Up to three position signaling switches can be integrated in the draw-out unit in order to transmit breaker position information to monitoring and control systems. They are installed in the right-hand side wall of the unit at the positions indicated in the diagram below:

Signal "Position of molded case circuit breaker in the draw-out unit"

It is irrelevant whether the position signaling switch is inserted in slot a or b. The other slots can be used for the signaling switches supplied with the communications interface kit or for an additional position signaling switch.

If the molded case circuit breaker in the draw-out unit is moved into a defined position with the crank handle, the appropriate position signaling switch outputs a signal which can be used in other electrical circuits such as visual or acoustic alarm displays

If the molded case circuit breaker is not in any of the defined positions, the switching position indicator displays the word UNBLOCK on a white background. In this position, the molded case circuit breaker is either off (position OFF, contacts open) or tripped (position TRIP, contacts open). The breaker main contacts cannot be closed with the breaker in the UNBLOCK state.

Depending on the position of the molded case circuit breaker in the draw-out unit, the outputs of the position signaling switches assume one of the following states:

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Signal "Draw-out unit locked / open"

Signal "Draw-out unit locked / open"

A position signaling switch to transmit this signal is installed in position 44 of the right-hand side wall of the draw-out unit.

A position signaling switch in position 44 outputs a signal which indicates whether the padlock locking unit is in the OUT position, thereby locking the draw-out unit.

The draw-out unit can be locked in the defined breaker positions CONNECT, TEST and DISCON by padlocks or a cylinder lock (available as retrofit component). The position of the molded case circuit breaker cannot be changed when the draw-out is locked. In the locked state, the opening for the crank handle is mechanically sealed and the handle cannot be inserted.

To lock the unit using padlocks, the padlock locking unit on the draw-out unit must be pulled out manually so that the shackles of the padlocks can be inserted through the opening. When the draw-out unit is locked by the cylinder lock, the padlock locking unit moves out automatically as the cylinder lock is turned because it is mechanically coupled with the cylinder lock in the draw-out unit. The position of the padlock locking unit ultimately determines the position of the contacts of the position signaling switch.

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Signal "Plug-in unit - MCCB correctly bolted to plug-in socket"

This option is provided for plug-in units only. Depending on the socket size, up to two position signaling switches can be installed in slot No. 46.

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With this application, the position signaling switches indicate whether the molded case circuit breaker is inserted in the plug-in socket and secured by at least one bolt. The reason for this application is that the molded case circuit breaker needs to be secured in position by fastening bolts in the plug-in socket. The four fastening bolts supplied with the complete kit for plug-in technology must be used for this purpose.

Communications interface for draw-out unit

The pre-assembled cable set which functions as the communications interface for the draw-out unit consists of a pre-assembled cable with a mini USB port at one end and three special position signaling switches at the other. It is also supplied with another cable with mini USB connector and tab connector.

Attaching the cable set

  1. Insert the 3 position signaling switches of the cable set in the right-hand side wall according to the color coding of the cables, see diagram below.
    It is irrelevant whether the switches are inserted in slots a or b.

    The remaining slots are normally used to install standard position signaling switches.

  2. Remove the seal over the opening for the micro USB port on the right-hand side wall.

  3. Insert the USB connector attached to the cable set into the micro USB port in the right-hand side wall.

  4. Store the cable in the space available behind the side wall.

  5. Connect the position signaling switches and the COM060 communication module to the USB connector and tab connector of the second cable.

The cable with pre-assembled USB and tab connectors can also be ordered as an individual item for installation on molded case circuit breakers prepared for use as draw-out units.

For detailed instructions on how to install the communications interface for the draw-out unit, please refer to the relevant Operating Instructions.

For instructions on how to transfer data via the remote transmission link, please refer to the Operating Instructions for the COM800 breaker data server.

Auxiliary circuit connector

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Plug-in technology

Draw-out technology

Auxiliary circuit connectors are required only if the molded case circuit breaker to be converted to plug-in or draw-out technology is equipped with internal accessories. Plug-in units use a different design of auxiliary circuit connector than draw-out units.

The number of auxiliary circuit connectors required depends on the accessories to be installed in the molded case circuit breaker and ultimately on the number of electrical connections which need to be brought out of the molded case circuit breaker. Each auxiliary circuit connector can be used to connect up to four cables. Accordingly, the breaker-end and socket-end halves of the auxiliary circuit connectors have four screw-type terminals which are labeled ".1" to ".4".

A total of nine auxiliary circuit connectors can be installed depending on the size of the molded case circuit breaker and the size of the plug-in or draw-out socket. The slots for auxiliary circuit connectors are labeled from right to left in the socket, starting at 1.

Cable cages are used to attach the breaker-end half of the auxiliary circuit connector to the underside of the molded case circuit breaker. Slot numbers are also printed on the cable cages. The design of the cable cages for the top and bottom halves of the molded case circuit breaker is different so that the cages cannot be mixed up or installed in the wrong position. The fixing tongues of the breaker-end half of the auxiliary circuit connectors latch into small recesses in the cable cages which are screw-mounted to the rear panel of the circuit breaker. The auxiliary circuit connectors are securely fixed once the cable cages have been installed.

The socket-end half of the auxiliary circuit connectors is simply snapped into the socket.

Various cable routing openings and ducts are provided in the socket and the molded case circuit breaker. For further details, please refer to the operating instructions for the complete kits for plug-in or draw-out technology.

See also

Door feedthrough

Door feedthroughs must be installed for applications which require

  • direct operation of a molded case circuit breaker even when the cubicle door is closed,

  • the draw-out version of a molded case circuit breaker to be electrically isolated from or connected to the installation while the cubicle door is closed,

  • prevention of access to live components inside the cubicle.

Door feedthroughs are mounted over the front of the molded case circuit breaker and securely attached to the breaker by means of two bolts and a latch.

Terminal cover for a molded case circuit breaker converted to plug-in or draw-out technology

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Terminal covers available to order as additional accessories are used to cover the termination area of plug-in and draw-out units. Two screw-mounted terminal covers are included in the complete kits and the conversion kits for plug-in and draw-out technology. These feature molded grips to ease withdrawal of the molded case circuit breaker from its socket. Since it requires significant force to remove a molded case circuit breaker from its socket, the plug-in terminal covers are bolted to the contact unit.

These terminal covers can be ordered separately as a spare part.

Cable cage

Cable cages are used to attach the breaker-end half of auxiliary circuit connectors to the molded case circuit breaker. They are also designed to act as cable ducts for installing wires from internal accessories to the auxiliary circuit connector. For further information about cable cages, please refer to chapter Auxiliary circuit connector.

Cable cages consist of a top half and a bottom half. These parts are designed such that they cannot be mounted in the wrong position at the rear of the molded case circuit breaker.

Cable cages are included in the scope of supply of the conversion kits and complete kits for converting molded case circuit breakers to plug-in or draw-out units and are therefore also supplied with complete kits. They are available as standard only in the broadened version for 4-pole units. For use on 3-pole units, part of the cable cage need only be cut away (at the required breaking point).

NO contact

NC contact

Common potential contact

41a or 41b: Detects position CONNECT

42a or 42b: Detects position TEST

43a or 43b: Detects position DISCON

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Slot for position signaling switch for signal "Draw-out unit locked / open"

Plastic frame for padlock locking unit

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Slot 46 for position signaling switch of the plug-in socket

Slot 46 for position signaling switch of the plug-in socket

Mechanical system for actuation of position signaling switches when the bolt is tightened

Bolt hole which determines the signal output by the position signaling switches

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CONNECT:

Position signaling switch with green cables

TEST:

Position signaling switch with blue cables

DISCON:

Position signaling switch with red cables

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Socket-end auxiliary circuit connector

Breaker-end auxiliary circuit connector

Cable cage

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Fixing tongue (breaker end)

Fixing hook (socket end)

Latching element (socket end)

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