I.B. 29C891B
Page 2
Effective 11/98
Figure 1-1 Series C L-Frame Molded Case Circuit
Breaker with OPTIM Trip Unit
Figure 1-2 SPB Systems Pow-R Circuit Breaker with
OPTIM Trip Unit
Figure 1-3 DSII Power Circuit Breaker with OPTIM Trip
Unit
1-3 PRODUCT OVERVIEW
The Digitrip OPTIM Trip Unit is a programmable, com-
municating, microprocessor-based, low voltage trip unit.
Digitrip OPTIM Trip Units are for use with Series C K-
Frame, L-Frame, N-Frame and R-Frame Molded Case
Circuit Breakers, SPB Systems Pow-R Circuit Breakers,
and DSII/DSLII Power Circuit Breakers (Figures
1-1
,
1-2
and
1-3
). These circuit breakers using Digitrip OPTIM
Trip Units cover a range of rated currents from 70
amperes to 5000 amperes. The Digitrip OPTIM Trip Unit
provides true rms sensing and utilizes a non-adjustable
interchangeable rating plug to establish the continuous
current rating of the circuit breaker (Figure
1-4
). Rating
plugs are interlocked to prevent use between different
circuit breaker frames.
The Digitrip OPTIM Trip Unit is an addition to the already
expansive family of Digitrip Trip Units (Figure
1-5
). Three
different models are available, OPTIM 550, OPTIM 750
and OPTIM 1050. The OPTIM 1050 Trip Unit has all the
features of the OPTIM 550 and 750 Trip Units plus sev-
eral additional features. The OPTIM 1050 Trip Unit’s
additional features are:
• Monitoring power and energy
• Monitoring current harmonics
Trip Unit
Trip Unit
Trip Unit
Summary of Contents for Digitrip OPTIM 1050
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