Micrologic trip units of Schneider Electric are advanced electronic devices used to provide protection, monitoring, and control for power circuits and loads. Schneider Electric’s circuit breakers are composed of units that streamline solutions to enhance reliability in systems, energy management, and improved overall operational efficiency.

Micrologic trip units serve diverse purposes as their range of applications ranges from general protection up to monitoring and predictive maintenance. Below we discuss several of the available models with their features.

Micrologic 2.2

• Overloads – adjustable long-time protection
• Short-time protection – adjustable

Applications:

• Standard and specific applications, including motor-feeder protection.

Dials:

• Two multi-position dials for setting and fine-tuning long-time protection.

EcoStruxure Integration:

• Compatible with PowerTag NSX and Compact NSX basic frame.

Examples:

• LV429070: 100A, 3 poles, for ComPact NSX 100/160/250 breakers.
• LV430470: 160A, 3 poles, for ComPact NSX 160/250 breakers.
• LV431520: 220A, 3 poles, for ComPact NSX 250 breakers.
• C1032G100: 100A, 3 poles, generator protection for ComPact NSX 100/160/250 breakers.
• C1632D160: 160A, 3 poles, for ComPact NSX 160/250 breakers.

Micrologic 5

Features:

• Protection: Adjustable long-time, short-time, and instantaneous protection.
• Selectivity: Zone selectivity for fault discrimination and reliable system operation.
• Indicators: Alarm LED, trip cause LEDs, and an LCD screen for energy monitoring.
• Additional Features:
  • Programmable ground fault alarm.
  • Neutral protection.
  • Power measurement.
  • Contact wear indication.
  • Modbus communication for local and remote settings.

Applications:

• Compatible with MasterPact NT, NW, MT, PowerPact P-Frame, R-Frame, and Compact NS breakers.

Micrologic 6.2

Features:

• Protection: Adjustable long-time, short-time, instantaneous, and ground-fault protection.
• Indicators: Alarm LEDs and a green “Ready” LED.
• Display: Includes energy measurement and adjustment module.
• Certifications: REACh, RoHS, and Environmental Disclosure compliance.

Applications:

• Designed for ComPact NSX circuit breakers.

Micrologic 7

Earth-Leakage Protection:

• Trip Version: Trips during earth-leakage detection.
• Alarm Version: Monitors and indicates earth-leakage faults on the display.

Comparison and Key Points

Common Features Across Micrologic Trip Units

• Protection: Overload and short-circuit protection.
• Installation: Plug-and-play compatibility with PowerPact or Masterpact circuit breakers.
• Electronic Circuit Protection: Adjustable settings for various parameters.
• Measurement: Advanced units offer energy and power quality metering.

Key Differentiators

• Functionality: Basic (Micrologic 2) vs. Advanced (Micrologic 5, 6, 7).
• Display: Present in Micrologic 5, 6, and 7; absent in Micrologic 1, 2, 4.
• Protection Setting Options:
  • Basic dials (Micrologic 1, 2, 4).
  • Advanced settings via software or keypads (Micrologic 5, 6, 7).