Micrologic is the electronic trip unit (control and measurement unit) used in MasterPact and other advanced low‑voltage circuit breakers. It is the “brain” of the circuit breaker, responsible for protection, measurement, monitoring, and communication functions.

In modern digital breakers such as MasterPact MTZ, Micrologic plays a central role in transforming a conventional breaker into a smart, connected protection and power management device.

---

Role of Micrologic in a Circuit Breaker

Micrologic is designed to:

• Detect overload, short‑circuit, and abnormal electrical conditions
• Trip the circuit breaker when protection thresholds are exceeded
• Measure electrical parameters such as current, power, and energy
• Provide operational and diagnostic data
• Enable communication with power management and monitoring systems

Without Micrologic, a circuit breaker would be limited to basic mechanical protection only.

---

Core Functions of Micrologic

1. Protection Functions

Micrologic provides electronic protection against:

• Long‑time overcurrent (overload)
• Short‑time overcurrent
• Instantaneous short circuit
• Ground fault (depending on type and configuration)

Protection settings are adjustable, allowing coordination with downstream devices.

---

2. Measurement & Metering

Micrologic units can measure:

• Phase and neutral currents
• Power and energy values
• Load levels and demand indicators

This allows the circuit breaker itself to act as a measurement point, reducing the need for separate meters in many applications.

---

3. Monitoring & Diagnostics

Micrologic continuously monitors:

• Breaker operating status
• Electrical loading conditions
• Abnormal operating events

This supports faster troubleshooting, improved reliability, and better maintenance planning.

---

4. Communication & Digital Integration

Micrologic enables communication between the circuit breaker and:

• Power management systems
• Energy monitoring platforms
• Supervision or control systems

This integration is essential in digitised electrical architectures, such as those built around PowerLogic platforms.