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Megger MTO210 Transformer Ohmmeter

Manufacturer part number: MTO210
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Key Features and Functions

The Megger MTO210 transformer ohmmeter is a line-operated, field-portable instrument designed specifically to measure the dc resistance of all types of magnetic windings safely and accurately. It can test transformers and rotating machine windings and perform low-current resistance measurements on connections, contacts, and control circuits.

The Transformer Ohmmeter is extremely useful when testing the windings and contact resistance of tap-changers with “make-before-break” contacts and voltage regulators. This action will check for pitted or misaligned contacts as the instrument will give an indication if either condition occurs.

  • Direct 2-channel digital reading (10 µΩ to 2000 Ω)
  • DC test current up to 10 A maximum
  • 0.25% measurement accuracy
  • Integrated demagnetization feature
  • Tests operation of on-load tap-changers
  • Very fast auto safety discharge circuit

Input: 85-264 V, 47-63 Hz, 720 VA

DC Output

  • User Selectable Current Ranges: up to 10 mA, up to 100 mA, up to 1 A, up to 10 A
  • Open-Circuit Test Voltage: 40 V dc
  • Measurement Voltage: up to 20 V dc
  • Max Power: 200 VA continuous
Accuracy: +/-0.25% Range +/-0.25% Rdg

Dimensions: 8.5 H x 21.5 W x 13 D in (216 H x 546 W x 330 D mm)

Weight: Net 29 lb (13.1 kg)

Description

Key Features and Functions

The Megger MTO210 transformer ohmmeter is a line-operated, field-portable instrument designed specifically to measure the dc resistance of all types of magnetic windings safely and accurately. It can test transformers and rotating machine windings and perform low-current resistance measurements on connections, contacts, and control circuits.

The Transformer Ohmmeter is extremely useful when testing the windings and contact resistance of tap-changers with “make-before-break” contacts and voltage regulators. This action will check for pitted or misaligned contacts as the instrument will give an indication if either condition occurs.

  • Direct 2-channel digital reading (10 µΩ to 2000 Ω)
  • DC test current up to 10 A maximum
  • 0.25% measurement accuracy
  • Integrated demagnetization feature
  • Tests operation of on-load tap-changers
  • Very fast auto safety discharge circuit