• Accuracy and Reliability
• Increases Protection and Coordination Capabilities
• Advance Warning
• System Diagnostics
• System Monitoring
• System Communications
• Field Testing

Superior rms Sensing for Accuracy and Reliability

Digitrip OPTIM Trip Units utilize the proprietary SuRE Plus^TM Chip microprocessor providing unparalleled accuracy for protection, system diagnostics, monitoring, and communications.

The new Digitrip OPTIM technology builds upon the original, front adjustable Digitrip RMS Trip Units to provide high reliability and increased functionality to meet the demands of tomorrow's dlectrical distribution systems.

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Programmability Increases Protection and Coordination Capabilities

• Time-current settings with more increments permit the user to Optimize system protection and coordination.
• Improved accuracy and reliability for system configuration are provided by displaying time-current pickup setpoints in actual amperes.
• Programmable short delay and/or instantaneous curve tripping options.
• Selectable powered and unpowered thermal memory as well as selectable sure start discriminator protection features.
• Increased system security is provided by the addition of programmable password protection.

Additionally, application software packages are available to configure, coordinate, and download setpoints to provide faster, more efficient system management.

For improved system coordination, we have added:

• 1⁴t long delay time slope to the traditional nine LSIG curve shaping options.
• Short delay and ground delay zone selective interlocking down to a 70 ampere molded case circuit breaker.

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Advance Warning Alers to Potential Problems

An important new feature is the OPTIM advance warning capability that helps keep the system operating and more productive.

• A programmable high load phase and neutral alarm, adjustable between 50 percent and 100 percent of 1_r (LDPU setting) will signal an impending trip condition.
• An adjustable ground fault alarm that will alert the user of a ground fault condition without tripping the breaker.
• Energy alarming can be performed (such as peak demand exceed) to reduce energy costs.
• THD alarming is included to detect changes in power quality.

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System Diagnostics Provide Reduced Downtime

Digitrip OPTIM includes a complete selection of system diagnostic capabilities.

Four cause of trip LEDs are mounted on the front of the trip unit and are complemented by trip event information that is stored in memory after a trip condition.

Remote breaker status indicator is provided by auxiliary and alarm switches for Series C L- and N-Frame Breakers; and by a power relay module for Series C N-Frame, SPB, and DSII/DSLII Breakers.

The Breaker Interface Module provides trip indication information on the front of the unit itself or via relay contacts to a remote location.

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System Monitoring - "If You Can't Measure It, You Can't Manage It"

• Digitrip OPTIM has an extensive menu of system monitoring capabilities:
• Load monitoring (ABCNG). g Power factor.
• Power and energy.
• Power quality - current harmonics.
• Accuracy based on full scale sensor

  rating:
  + 2% Current.
  + 4% Power.
  + 5% Energy.

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System Communications

All OPTIM programming, configuration, advanced warning, diagnostics, monitoring, and control capabilities can be accessed from a central PC using IMPACC software. Additional software packages can be provided to perform system coordination and energy management as well as waveform capture.

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Field Testing to Verify Performance

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