Megger OTS PB/OTS AF Insulating Oil Breakdown Tester | Fully automatic, 60/80/100 kV, built-in IEC 60156, ASTM D877/D1816 and other standards

Megger OTS PB/OTS AF Fully Automatic Insulating Oil Breakdown Tester

Overview

The OTS PB and OTS AF are Megger fully automatic insulating oil dielectric breakdown voltage testers for breakdown and withstand voltage testing of mineral, ester and silicone oils. The PB series is compact and can run on battery, suited to field use; the AF series has a larger test chamber, an alphanumeric keypad and barcode scanner support, suited to laboratories. Pressing any key during a test cuts off the high voltage.

Key Specifications

• Test voltage: OTS60PB/OTS60AF 0–60 kV rms; OTS80PB/OTS80AF 0–80 kV; OTS100AF 0–100 kV
• Ramp rate: Per standard 0.5 / 2.0 / 3 kV/s; custom 0.5–10 kV/s
• Voltage accuracy: Resolution 0.1 kV; ±1% ±2 dgt at 5 kV/s or below
• Built-in standards: IEC 60156 (including the 2018 edition), ASTM D1816, ASTM D877, GB/T 507, JIS C 2101 and others; plus 3 custom sequences
• Test vessel and temperature: 400 ml (optional 150 ml), lockable electrode gap; continuous oil temperature measurement 10–65 °C
• Power: 85–265 V AC; PB models also have a NiMH 24 V 2 Ah battery, approx. 10 test sequences
• Interface: 3.5-inch color QVGA; built-in dot-matrix printer; export to USB flash drive; PowerDB Lite included
• Dimensions and weight: PB 520 × 340–380 × 250 mm, 16.8–20.8 kg; AF 580 × 420 × 290 mm, 30 kg; IP30

Applications

• Periodic breakdown voltage testing of insulating oil in transformers and switchgear.

Specifications per the Megger product page and OTS PB/AF datasheet (V10) (retrieved 2026-10-21).