Industrial circuit breaker (MCCB, ACB, VCB)

Products and reference designs

Industrial circuit breaker (MCCB, ACB, VCB)

Block diagram

Overview

Our integrated circuits and reference designs help you protect your grid assets by creating circuit breakers that rapidly detect faults, reliably communicate via wired and wireless interfaces and efficiently generate power from the line. The following subsystems will help you quickly design an industrial circuit breaker (air (ACB), molded case (MCCB), or vacuum (VCB)) to better protect loads during overloads or short-circuit situations.

Design requirements

Modern circuit breaker (ACB, MCCB, VCB) designs often require:

  • Accurate sensing of wide-input current, voltage and temperature.
  • Fast startup for rapid fault identification.
  • Reliable wired or wireless communication interfaces.

Block diagram

Find products and reference designs for your system.

Air Circuit Breaker (ACB)

CT CT ZCT ZCT ZSO/ZSI ZSO/ZSI Option #1 Option #1 Option #2 Option #2 Option #3 Option #3 230V/110V AC 230V/110V AC PT PT R Y B N R Y B N Auxiliary DC Auxiliary DC R R div div Trip Settings Trip Settings Digital Logic Digital Logic Power Stage Power Stage Relay Driver Relay Driver Solenoid Driver Solenoid Driver Digital Logic Digital Logic HMI HMI LED Driver LED Driver Latch Latch Signal Output Protection Signal Output Protection Protection Protection Protection Protection Local Debug Local Debug USB USB RS-232 RS-232 Serial Interface SerialInterface Profibus Profibus CAN CAN RS-485 RS-485 Signal Isolation Signal Isolation ISO ISO ISOW ISOW Digital Processing Digital Processing MCU MCU Self-Diagnostics/Montintoring Self-Diagnostics/Montintoring Supervisor/ Watchdog Supervisor/ Watchdog Temperature Temperature Power on Reset Power on Reset Display (HMI) Display (HMI) Backlight Controller Backlight Controller MCU MCU DC/DC DC/DC ALS ALS CLK CLK Memory Memory DC/DC Power Supply DC/DC Power Supply DC/DC DC/DC LDO LDO AC/DC Power Supply – Current Input AC/DC Power Supply – Current Input MOSFET MOSFET Shunt Regulator Shunt Regulator Comp Comp Reference Reference Protection Analog Front End Protection Analog Front End AMP AMP MUX MUX AMP AMP Reference Reference Buffer Buffer ADC ADC Leakage Current Analog Front End Leakage Current Analog Front End AMP AMP MUX MUX Measurement Analog Front End Measurement Analog Front End MUX MUX Buffer Buffer Comp Comp AMP AMP AMP AMP Reference Reference ADC ADC Signal Input Protection Signal Input Protection Protection Protection Protection Protection Protection Protection AC/DC Power Supply – Voltage Input AC/DC Power Supply – Voltage Input AC/DC AC/DC

Technical documentation

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Type Title Date
White paper Enabling and integrating wired & wireless technologies for grid interoperability 22 Mar 2019

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