GE Vernova’s latest and advanced Kelman BMT 430 is on-line system that continuously monitors the condition of the bushings, which are constantly under high stress, and developing partial discharge (PD) activity in the transformer. It will immediately alert personnel of evolving fault conditions with the bushings and provide vital health information on the bushings and the transformer.

The Kelman BMT 430 is a standalone system but can also be easily integrated with a GE Vernova’s Kelman DGA 900 multi-gas analysis unit providing additional on-line DGA capabilities enabling a more in-depth view of the transformer’s overall condition and root cause of major transformer failures.

Key Benefits

• One product monitoring bushing Capacitance, Power Factor (tan delta) and Partial Discharge activity using a single sensor and connection point.
• Enhanced computing power, scalable I/Os and an integrated HMI combine to provide a powerful and reliable bushing monitoring solution.
• Easily upgradeable in the field to a KELMAN DGA 900 Plus system for more in-depth and complete transformer monitoring package.
• Full integration with GE’s acclaimed Perception™ Fleet asset management software.
• One supplier installing, servicing, ensuring proper communication and minimizing administrative burden to lower the total cost of ownership of your transformer

System Features

• System can monitor Monitors up to 3 sets of 3 bushings: 3-phase transformer or a bank of 3 single phase transformers.
• Built-in web-page based HMI for easy and quick access to live measurements.
• Integrated 7” color LCD screen for simplified local user interaction and visualization of data.
• Extensive communication options for local and remote communications.
• Inputs and outputs for additional sensors including load and top oil temperature.

Bushing Adaptor Features

• Designed to allow off-line testing of bushing without completely removing bushing adaptor from voltage tap.
• Marine grade aluminum to withstand extreme environmental conditions rated IP66.
• Surge protection -suppression circuit to always limit voltage within the adapters in case of transients.
• Fail safe circuit ensure the bushing tapping points remain grounded should open circuit and/or surge protection fail.

Kelman BMT 430 Substation Monitoring Applications

In the applications below, diagram 1, shows the Kelman BMT 430 being used on a 3-phase transformer, where they can monitor either one set of three bushings and up to three sets of three bushings. In diagram 2, shows the Kelman BMT 430 is being used on a bank of single-phase transformers along with a spare transformer.