What is magnetic susceptibility balance?

April 21, 2020 Off By idswater

What is magnetic susceptibility balance?

An Evans balance, also known as a Johnson-Matthey balance (after the most prolific producer of the Evans balance) is a device for measuring magnetic susceptibility. Magnetic susceptibility is related to the force experienced by a substance in a magnetic field.

How does a magnetic balance work?

A device for determining the repulsion or attraction between magnetic poles, in which one magnet is suspended and the forces needed to cancel the effects of bringing a pole of another magnet close to one end are measured.

How does magnetic susceptibility vary with magnetic field?

The magnetic susceptibility of a material, commonly symbolized by χm, is equal to the ratio of the magnetization M within the material to the applied magnetic field strength H, or χm = M/H. Paramagnetic susceptibility is inversely proportional to the value of the absolute temperature.

What is the value of magnetic susceptibility?

χ>0
Magnetic susceptibility is χ>0 which means it is always a small positive value for paramagnetic materials. These materials are temperature dependent and are weekly attracted by magnets with relative permeability 1.00001 to 1.003.

What is magnetic balance?

The magnetic balance test is a most commonly used proactive test is performed only on three-phase transformers to detect the faults in the core and to verify the imbalance in the magnetic circuit also to identify inter-turn faults in the transformer at the early stage of manufacturing work.

How is magnetic current measured?

  1. Put a material in a magnetic field.
  2. Run a current through this material.
  3. The magnetic field will create a “sideways” change in electric potential across the material – which you can measure.
  4. Using this change in potential and the size of the material, you get the magnitude of the magnetic field.

What is the difference between magnetic susceptibility and magnetic permeability?

Magnetic permeability of a material is the ability of a material to support the formation of a magnetic field inside itself. Magnetic susceptibility is the measure of magnetic properties of a material which indicates whether the material is attracted or repelled from an external magnetic field.

What is magnetic susceptibility used for?

Quantitative measures of the magnetic susceptibility also provide insights into the structure of materials, providing insight into bonding and energy levels. Furthermore, it is widely used in geology for paleomagnetic studies and structural geology.

Why magnetic balance test is done?

Magnetic balance test is conducted only on three-phase transformers to check the imbalance in the magnetic circuit. Result of this test indicates uniform distribution of flux insulation. This test is carried out by applying 3 phase 400V AC to one winding, measured induced voltages on other two winding on same side.

How do you perform a magnetic balance test?

Transformer Magnetic Balance Test Procedures:

  1. Keep the transformer Tap Changer in an ordinary position.
  2. Apply a single-phase AC voltage on one of the terminals of the HV winding.
  3. Measure the voltage between the two other HV terminals.
  4. Repeat the test for each of the three phases. Left side phase.