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Power Transformer Testing

Transformer Ohmmeter TOS1

Brand: Megger
Available on order
Product description
High accuracy ±0.1% of the standard ohmmeter
Robust construction for field use
Designed for use with large test clips or banana-type inputs
Four-wire Kelvin – no lead compensation
Universal standard for use with all ohmmeters
The TOS1 transformer ohmmeter is designed for use with ohmmeters as a high-precision resistance standard. This unique standard provides resistance measurements across a wide range of applications during ohmmeter calibration and is intended for use as a laboratory calibration standard or as a portable control standard for verifying any ohmmeter's resistance in field conditions.

TOS1 is mainly intended for calibration centers requiring precise resistance values and can be used with any single-phase or three-phase ohmmeter. When testing three-phase ohmmeters with TOS1, use the single-phase excitation method.