Siemens TL.. Manual de instrucciones descargar pdf (Pagina 13)

Installation Instructions

Electronic Trip Unit

CAUTION

Installation of Electronic Trip Unit

The SB breaker has a built-in interlock device that prevents the

breaker from being closed when there is not an installed trip

unit. This same interlock device will trip the breaker when the

trip unit is removed.

1. Remove 8 screws from breaker front cover.

Note: If you are installing a SB-EC Trip Unit, refer to the

Information and Instruction Guide for this device (IPIM-

2208).

To install the trip unit, remove the breaker’s front cover. This is

done by removing the four recessed Phillips head screws in

positions 2, 3, 6, and 7, as well as the four Phillips head screws

in positions 1, 4, 5, and 8, which hold the front cover in place.

NOTE: For more complete information on other standard

and optional features of the electronic trip units, see

Siemens Electronic Trip Units for SB Encased Systems

Breakers Information and Instruction Guide Bulletin IPIM-

2203 and the Sentron Systems Breaker Energy Communi-

cating Trip Unit Information and Instruction Guide

Bulletin IPIM-2208.

2. Lift off front cover.

On trip units with ground fault protection, the ground fault

selection switch on the side of the trip unit must be set to the

appropriate sensing scheme—Residual or Source Ground/Zero

Sequence—before installing the trip unit. The trip unit is preset

at the factory to a residual sensing scheme.

3. Set ground fault selection switch.

Do not attempt to install a trip unit

with the breaker Closed or Charged.

Make certain breaker is Open and

Discharged as shown above. Personal

injury or mechanical damage may occur.

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Siemens TL.. Manual de instrucciones Pagina 13