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Get More from Your Circuit Breaker Monitor

May 19, 2026

High voltage circuit breakers are among the most expensive and consequential assets on a utility's grid. An unexpected failure can force a load transfer, trigger emergency repairs, or require a full equipment overhaul. The INCON® Optimizer3 monitors breaker timing and performance continuously, but a complete picture of breaker health extends beyond trip and close events. Auxiliary systems like cabinet heaters, spring winding motors, and SF6 gas carry their own failure risks.

The Optimizer3's sensors and accessories extend monitoring to cover those systems, giving utility personnel the data to address a small issue before it becomes a costly one. With the range of INCON® Optimizer3 sensors and accessories, utility personnel are empowered with data to repair a small issue before it causes a substantial failure that may require equipment replacement or even an entire overhaul of a high-cost asset.

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ACCESSORIES & AUXILIARY SYSTEMS

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Current Transformer Pickup Coils

The Optimizer3 measures fault current in each phase during arc time and calculates the damaging energy (I2T) for each phase. I2T accumulates at different rates based on fault current and the involved phase.

Using current transformer pickup coils, the Optimizer3 measures real-time current flow in the bushing current transformer secondaries. This objective data allows for intelligent, need-based maintenance scheduling.

 

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AC Current Transducer

Most breakers have continuously-running cabinet heaters to prevent moisture condensation by keeping the control cabinet warmer than the outside air. These heaters typically use AC power and can be monitored using an AC Current Transducer.

The transducer offers a current sensing range (10, 20, and 40 amps) selected by a switch. Once the heater’s nominal current is determined, the Optimizer3 can be programmed to alarm if a heater fails, resulting in a current drop.

 

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DC Voltage Transducer

The Optimizer3 can monitor the AC or DC voltage supplies in the control cabinet, including cabinet heaters, spring winding motors, air compressor motors, station service, and battery banks.

Using voltage or current transducers, these measurements are logged in the database every two hours, with upper and lower limits set to activate alarms.

 

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Power Status Monitor

Tank heaters are thermostatically controlled, so they do not run continuously. The Power Status Monitor is wired into the heater supply circuit and enables the current draw of the heaters to be monitored only when they are turned on.

If one or more of the heater elements fails, the current draw will be too low and the Optimizer3 will trigger a heater alarm.

 

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Trip Coil Isolator

The Trip Coil Isolator is a cost effective means to achieve compliance with regulations requiring redundant trip circuits on all circuit breakers 115 KV and above as well as physical isolation of critical circuits in medium and high voltage environments.

With the Trip Coil Isolator, the Optimizer3 can monitor trip circuits 1 & 2 as if it was hard-wired to them both, yet maintain the isolation required by regulations.

 

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INCON® OPTIMIZER3 CIRCUIT BREAKER MONITOR

The INCON® Optimizer3 Circuit Breaker Monitor is an online continuous performance monitor for high voltage circuit breakers, designed to facilitate condition-based maintenance with real-time performance and health data.

With early detection of circuit breaker deficiencies, the Optimizer3 enables utilities to proactively address issues before they escalate, saving both time and resources while helping to boost reliability. Deploy maintenance with intelligence, defer offline testing, limit truck rolls, and lower overall maintenance costs with the Optimizer3

Extend Circuit Breaker Life

Defer or Eliminate Offline Testing

Employ Condition-Based Maintenance

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OPTIMIZER3 ACCESSORY GUIDE

Learn more about INCON® Optimzer3 Circuit Breaker Monitor accessory and auxiliary systems.

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