Siemens TL.. Manual de instrucciones descargar pdf (Pagina 9)

Description

Electronic Trip Units For Siemens SB Encased Systems Breakers

Trip Units

Two types of trip unit are available for the SB breakers. The TL

(standard) Trip Unit features a full range of industry standard

protective settings. The new, high-performance Systems

Breaker Energy Communicating Trip Unit (SB-EC Trip Unit)

offers advanced metering, protective relaying, time-stamped

logs, and power quality monitoring functions, including an inte-

gral keypad and LCD graphical display for menu-driven system

conﬁguration and real-time voltage and current waveform dis-

plays. Both units offer unique models to provide an efﬁcient

combination of options versus cost for each application.

Typical Trip Adjustment Unit Panel

Interchangeable Rating Plugs

SB trip units use ﬁeld interchangeable rating plugs. This allows

the ampere rating of the circuit breaker to be ﬁeld-modiﬁed

and provides security against indiscriminate changes in the

breaker’s ampere rating.

Advanced True RMS Current Sensing

The TL Trip Unit and the SB-EC Trip Unit feature advanced

digital-processing techniques to measure the true heating

content of the current waveform. This True RMS value of

current measurement virtually eliminates nuisance tripping

due to the presence of harmonics on the distribution bus.

TL Trip Unit

The TL Trip Unit offers adjustable LI, LIG, LSI, and LSIG trip

settings and accessory ammeter and load alarm or ground

current meter with alarm output.

SB-EC Trip Unit

The Energy Communicating trip unit for the SB offers local and

remote programming of all overcurrent trip functions as well

as power and energy measurement, advanced protective

relays and alarms and power quality functions (harmonics and

waveform capture and display).

NOTE: For details on these trip units, refer to the Siemens

TL Trip Unit Bulletin IPIM-2203 and the Siemens SB-EC Trip

Unit Bulletins IPIM-2208.

SB-EC Trip Unit

Rating Plug

Curve

Adjustments

Fault Indicators

Built-in

Test Functions

Plug-in

Display Module

=1000A

1000A

MAX Rating

= 2000A

MAX

Rating

NOTE:

Earlier model trip units may use (I

) as the

Rating Plug Designator and (I

) to denote (MAX

Rating). The designations for the current model

trip unit are shown at left. Note, however, that the

change in designation has no effect on the switch

settings used for selecting Continuous, Long Time,

Short Time, Instantaneous, and Ground Fault

pickup and delay values.

Graphical

Rating

Plug

Backlit

LCD

Watchdog

LEDs

Status

Indicators

Integral

Keypad

TS-31 Test

Connector

RS-232

Communi-

cation Port

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Siemens TL.. Manual de instrucciones Pagina 9

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