MINITRANS HI-POT Cost-effective on-line DGA & moisture for transformers

Product Overview
Knowledge of the condition of transformers is essential for all electrical networks and on-line
monitoring of transformers is an increasingly vital component of successful asset management
programs. The information provided by multi-gas on-line DGA allows valuable asset capabilities to be
maximized and expensive failures to be avoided.
Dissolved Gas Analysis (DGA) and moisture measurement of the insulation oil are recognized as the
most important tests for condition assessment of any tank of a transformer. Traditionally performed
in a laboratory environment, the MINITRANS provides for partial on-line discrete DGA and moisture
monitoring.
Key Benefits
• Cost effective on-line DGA
• Remote insight into transformer condition
• Discrete measurement of key gases associated with arching
cellulose degradation and general fault conditions
• Faults can be detected in infancy
• Generic fault type can be classified from results
• Transformer load and output can be optimized safely
• Aids condition based and predictive maintenance strategies
• Available with AC or AC/DC power supply

MINITRANS HI-POT

Applications
Multi-Gas DGA has traditionally been confined to infrequent off-line laboratory analysis, forming part
of time based maintenance strategies. Globally the average age of transformers continues to increase,
whilst in comparison to historical experience a larger percentage of new transformers encounter faults
in their early years of operation. This means the possibilities of rapid aging, unplanned outages and even
catastrophic failures between off-line tests also increases leading many asset owners to adopt on-line
DGA monitoring equipment more suited to condition based/predictive maintenance strategies.
The MINITRANS facilitates entry into discrete on-line DGA and moisture monitoring for transformers
and other oil insulated filled electrical equipment. Discretely measuring 3 key gases: Hydrogen; Carbon
Monoxide and Acetylene; plus Moisture, MINITRANS gives insight on developing faults, paper degradation
and electrical arching providing trending of gas-in-oil through its close integration with GE’s powerful
Perception software suite and/or users own software, historian and SCADA systems. At a price that
facilitates higher volumes of monitor deployment, MINITRANS can be utilized to monitor any size of
transformer but is most widely employed to expand multi-gas on-line DGA coverage beyond the typical
candidates of large, system critical or compromised transformers helping asset owners incorporate online DGA

across a larger portion of their fleet, with a view to extending asset life, preventing unexpected
failure and operating on a condition based/predictive maintenance schedule.