Transformer Oil Tester

A: ASTM D1816 uses mushroom-shaped electrodes with motorized stirring and specific gap settings (1.0 mm or 2.0 mm), making it highly sensitive to dissolved water and small particulate contaminants in modern power transformers. ASTM D877 uses flat disc electrodes with no stirring and a 2.5 mm gap, historically used for routine breakdown checks on unimpregnated oil. Our BDV units include pre-programmed profiles for both standards.

A: The high-voltage circuit incorporates a rapid solid-state shutdown mechanism that cuts off current within less than 10 milliseconds upon arc detection. This limits total breakdown energy, minimizing carbon particle generation and preserving oil sample integrity for subsequent test runs.

A: Selected portable models offer an optional built-in lithium battery pack capable of performing up to 50 complete test sequences (6 breakdowns per sequence) per full charge, eliminatingysts the need for line power during remote field operations.

A: Standard shipments include one pair of spherical electrodes, one pair of mushroom (VDE) electrodes, one pair of flat disc electrodes, precision gap adjustment gauges (1.0 mm, 2.0 mm, 2.5 mm), a magnetic stirring bar, and a heavy-duty transport case.

A: An annual calibration interval is recommended to maintain compliance with ISO 9001 and ISO/IEC 17025 audit guidelines. Calibration can be performed using standard HV divider calibration kits or sent to authorized local calibration centers.

A: Standard BDV and Karl Fischer units ship within 5 to 7 business days. Specialized multi-parameter lab systems or units requiring non-standard power input adapters ship within 2 to 3 weeks from order confirmation.