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  • Users: RajT
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  1. RajT

    Failure due to harmonics

    I am on a project where we are commisioning new installed equipment. The plant UPS system feeds several 110Vac “Beacons” ( stroboscopic lights used by the PA system) . The unit ratg is about 50VA. We are finding that these beacons are failing after a few days in service. The supplier of the...
  2. RajT

    Electric Fire Water Pump Feeder design

    We are requred to provide a 6.6kV DOL vacuum contactor feeder to a 500kW motor forming part of a Fire water pump package. I understand that the NEC or some other standards require that the contactor design must be of a mechanically latched type vs the conventional magnetically held type. I can...
  3. RajT

    Laying of IS and nonIS circuit cables

    We have an application of a 6.6kV feeder to a motor on a offshore platform. The motor is located in (div 2) Zone 2 area. The main motor cable is a 3c laid in ladder rack. Along side this cable we have a cable ( 7c screened) also going to the motor RTDs. The cables are not touching and have an...
  4. RajT

    CT Curves

    Can anyone suggest how one can obtain ( through the web perhaps) a set of mag curves for a range of CT ratios

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