Micrologic Trip Units
Micrologic Trip Units
Micrologic electronic trip units are designed for use in both PowerPact and Masterpact circuit breakers
Part of PacT Series
All Micrologic trip units provide impeccable, electronic circuit protection with adjustable protection settings for maximum system coordination and flexibility. Sophisticated functionality, such as energy and power quality metering capabilities, is integrated in the more advanced trip units.
Features
PowerPact® P- and R-frame molded case circuit breakers and all Masterpact® power circuit breakers are equipped with the Micrologic® trip system to protect power circuits and loads. Micrologic trip systems use a set of current transformers (called CTs or sensors) to sense the current, a trip unit to evaluate the current m and a tripping solenoid to trip the circuit breaker. Micrologic trip-units are field-interchangeable.
Protection Level
2.0 – LS0: Long Time+ Short Time+ Zero Delay protection, IEC rated
3.0 – LI: Long Time + Instantaneous protection, UL Listed and ANSI Certified
5.0 – LSI: Long Time + Short Time + Instantaneous protection, UL Listed, ANSI Certified, and IEC Rated
6.0 – LSIG: Long Time + Short Time + Instantaneous + Ground fault protection, UL Listed, ANSI Certified, and IEC Rated
Models
Micrologic (Standard) 2.0, 3.0 and 5.0 Trip Units
- True RMS sensing
- LI, LSI trip configurations
- LS0 trip configuration for IEC
- Field-interchangeable long-time rating plugs
- LED long-time pickup indication
- Test kits available
- Thermal imaging
Micrologic (Ammeter) 2.0A, 3.0A, 5.0A and 6.0A Trip Units
Includes all features listed for Micrologic standard trip unit, as well as:
- LI, LSI, LSIG trip configurations
- LS0 trip configuration for IEC
- Digital ammeter—phase and neutral (4-pole only)
- Phase loading bar graph
- LED trip indication
- Zone-selective interlocking (ZSI) (short-time & ground-fault)
- Optional Modbus® communications—PowerLogic® compatible
Micrologic (Power) 5.0P and 6.0P Trip Units
Power measurement and advanced protection features includes all features listed for Micrologic ammeter trip unit, as well as:
- LSI trip configuration with programmable ground fault alarm
- LSIG (Ground-fault trip) with programmable ground fault alarm
- Incremental “fine tuning” of L, S, I, and G pickup and delay settings
- LCD dot matrix display and LED trip indication
- Advanced user interface
- Advanced protection IDMTL—selectable long-time delay bands
- Neutral protection
- Power measurement
- Contact wear indication
- Modbus communications—PowerLogic compatible
- Local and remote settings
Micrologic (Harmonic) 5.0H and 6.0H Trip Units
Power quality measurement and advanced protection features. Includes all features listed for the Micrologic P (Power) trip unit, as well as:
- Enhanced power measurements functions
- Power quality measurements
