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  1. Shanaya

    How do I calculate permeability of magnetic core? Where it is used?

    Hello, Thats a quite advanced question for a student like yourself. I would like to suggest first get your basics clear then decide to work on such level of project. For your reference you can follow this article https://nicoreindia.com/magnetic-core-and-where-is-it-used/
  2. Shanaya

    Looking for ideas on Electrical Enclosures

    Electrical boxes (like light switches) can work. Radio Shack is offering project boxes. Small projects fit comfortably into the Altoids tin.
  3. Shanaya

    Protection of Manual Trasnfer Switches

    When designing a power system and defining a transfer switch, the best practise approach is to use circuit breakers for ATS safety. Breaker upstream shielding a transfer switch has a deliberate short time delay of 0.1 such transfer switches would need a 65kA 3 cycle, WCR.
  4. Shanaya

    Will a larger Thermocouple wire gauge change temperature readings?

    Thicker wires mean that you heat the 'cold' end more (and, as in the commentary) by extracting more heat from the hot end. The no-load voltage is proportional to the temperature difference between the ends for a rough approximation. Long thick wire (long enough the cold end does not heat...
  5. Shanaya

    Ain't it beautiful?

    Better to lock out that electricity than drop out of this world.
  6. Shanaya

    Is Glowforge worth the money?

    Glowforge makes its own laser-safe materials that have been engineered. It 's certainly not a cheap investment, but it was worth 100 per cent to me.
  7. Shanaya

    ATEX multiple circuits / one breaker

    The ATEX Directive consists of two EU directives specifying minimum protection criteria for the workplace and equipment used in explosive atmospheres.
  8. Shanaya

    Surge Arrestors Testing

    To help ensure full service life and reduce the risk of sudden failure, surge arresters should be maintained and electrically tested at regular intervals. Inspection and testing should also be carried out as part of the new systems prior to commissioning. Mechanical / Visual Inspection: The...
  9. Shanaya

    Transformer In rush current

    When a transformer is energised, it may draw a large transient current from the grid supply, resulting in a temporary voltage dip at the point of connection (POC) where customers are connected. The voltage dip is dependent upon the magnitude of the transformer inrush current which in turn...
  10. Shanaya

    What happens with Stator Rewinds

    Not only is it due to rewinding, it can reduce performance due to wear and tear and long use. Generally, when the motor burns and has to be sent for rewound means, the motor gets older and naturally loses its originality. This occurs a few times after rewinding when mounting the rotor, the end...
  11. Shanaya

    Servo motor inertia ratio

    Although it seems sensible that a 1:1 inertia ratio will be the target, it is not always feasible or cost-effective. Many servo motor manufacturers recommend keeping the inertia ratio at or below 10:1, although there are many applications that work well at much higher ratios. The best inertia...
  12. Shanaya

    Motor Starter vs Thermal Overload Relay

    The NEC electrical code includes thermal overload safety for all 1/3 HP and above motors, so circuit breakers and fuses need to be oversized to allow the motor to start up current, which is around 6 times the full-load current. We are permitted to over-size the breaker or the fuse so as not to...
  13. Shanaya

    Pilot Isolation Transformer Working Principle?

    Insulation transformers often minimise the high-frequency noise being transmitted either from the line to the connected device or from the device back to the line. This is due to the inductance of the transformer series and the grounded Faraday shield, which decreases the capacitive coupling of...

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