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Recent content by ema157

  1. ema157

    Types of battery used in UPS and Electrical Substations

    We use VRLA banks for 125 V protection in substations, typically either Exide Absolyte GP or Enersys SuperSafe TM.
  2. ema157

    Outdoor Disconnect Switches for use in Europe (IEC) - Suppliers?

    Looks like GE Vernova has 24 kV up to 4000 A, if you are ok with vertical break.
  3. ema157

    Earthing/Grounding of Structures beneath Transmission Lines

    As I believe you are in NZ, you could use the transmission company's service specification 07.23 (Work site and Mobile Plant temporary earthing and equipotential bonding of transmission lines) as a starting point.
  4. ema157

    7/8 - 14 2B

    Class 2B is standard/free fit for internal threads. See here or here.
  5. ema157

    Supply Side and Equipment Grounding Conductors in HV Substation

    I believe multiple single-point grounding can also be called sectionalised single point bonding, please see Figure 2.4 from CIGRE TB 797 below: The sheath voltage limiter is essentially 'open', like a surge arrestor, so only one end of the cable is directly grounded. The sheath/shield is not...
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