Retrofit Transformer Monitoring | Replacing a Qualitrol 509

B100 Electronic Temperature Monitor, C50 Transformer Monitor, and E3 Transformer Monitor are drop-in alternatives for legacy transformer monitors and panel mounts. They monitor top oil, LTC tank and winding temperatures, load current, and support hydrogen, moisture, bushing, and partial discharge monitoring with retrofit kits and support services.

Product Overview

• Drop-in replacements for legacy transformer monitors.
• B100, C50, and E3 options with modular expansion.
• Monitor temperatures, load, hydrogen, moisture, bushings, and partial discharge.
• Fits existing panel mounts; reduces installation time and maintenance costs; retrofit kits with support services across lifecycle.

Drop-in retrofit monitors replace legacy units without panel modifications. B100, C50, and E3 measure top oil, winding, and LTC temperatures, load current, and support cooling control. Integrated hydrogen, moisture, bushing, and partial discharge monitoring enable condition-based decisions, reduced maintenance, faster installation, and expanded modular functionality, improved transformer reliability and safety.

Target Market

Engineers and asset managers in transmission and distribution, power generation, renewable energy, data centers, industrials, and mining use these monitors to retrofit legacy transformer monitoring, enhance condition-based monitoring, and streamline installation and maintenance in substation environments.