The TOR-100 is our automatic breakdown voltage tester for insulating oils, compliant with IEC 60156. It performs automatic testing with adjustable voltage rise rate and data storage. We will prepare a quotation including lead time and available configurations upon request.

One aspect that is often overlooked when selecting a breakdown voltage tester is where it will actually be used. For utilities and service teams performing field diagnostics, a portable instrument with battery-powered operation can significantly simplify testing at substations and remote transformer sites, especially where a stable power supply is unavailable. This makes routine condition assessments more convenient while maintaining consistent test procedures. The photo below shows an example of a compact breakdown voltage tester designed specifically for reliable on-site transformer oil testing.

You’re absolutely right — for utilities and field service teams a portable, battery‑powered breakdown voltage tester removes a lot of logistical friction and makes routine condition assessments at substations and remote transformer sites far more practical. The TOR-80A is precisely the compact, field-capable option intended for that use: it has an internal rechargeable battery for autonomous on-site operation and an AC input range (85–264 V) for charging or mains operation, while the TOR-80 family supports data transfer to PC/network for reporting and record-keeping.

When you choose a field unit, confirm a few practical items beyond portability: battery runtime and charging options to match your site cadence, ruggedness and case protection for outdoor use, user safety interlocks and proper grounding for high-voltage tests, and traceable calibration support. Also verify the tester’s handling of sample prep and measurement conditions (electrode gap, temperature logging, and degassing procedures) and that it supports the dielectric standards you require (for example IEC 60156 and relevant ASTM/VDE/IRAM standards). If you’d like, I can prepare a quotation and suggest the best configuration and accessories for routine field diagnostics and reporting.