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  1. Askarel27

    HOW TO ADD ROD STAINLESS STEEL 316L IN ETAP

    ETAP is limited to Stainless Steel, S304 grounding rod and our client is requiring Stainless Steel, S316L for grounding rod. I have tried to add stainless steel S316L using GRDLib.mdb using microsoft Access but it is not working. Is there any method to show and add Stainless steel S316L in...
  2. Askarel27

    Is line contactor not required. what is his purpose?

    The soft starter used in this project is Siemens 3RW40, the application is for pump for lift station.
  3. Askarel27

    Is line contactor not required. what is his purpose?

    In the attached file, line and bypass contactor are provided. One operation engineer from the client side commented to remove the line contactor. Is it ok to remove the line contactor, if it is not remove thus it give additional protection. I want to know also what is the purpose of the line...
  4. Askarel27

    HVAC Total Power Input in kW

    The client has asked me to provide the total power input in kW of a Package AC. The electrical data for the Package AC are: MCA = 63.8 Amps ; MOCP = 90 Amps Compressor RLA (2 ea) = 22.4 Amps & LRA = 150 ; Fan Motor = 1.7 Amps. Note: Voltage is 460-3ph-60Hz. Based on the above data, How can i...
  5. Askarel27

    Determine if the motor is WYE or DELTA

    The motor that has no nameplate and has only 3 wires out. How could we know the connection of a motor if it is star or delta?
  6. Askarel27

    PUMP MOTOR SIZE DUE TO FLUID TEMPERATURE OF ABOVE 40 DEG C

    The fluid is industrial waste water, TDH = 30 m, Duty = 885 m3/hr, Sunction = Flooded, Fluid temp = 60deg C, Sump depth = 3m , Motor Voltage 460V, 3ph, 60HX, Exd, IE3 efficiency. The vendor calculated at fluid temp at 40degC, the selected motor rating is 112kW (150hp).However, when he changed...
  7. Askarel27

    PUMP MOTOR SIZE DUE TO FLUID TEMPERATURE OF ABOVE 40 DEG C

    Can someone explain the effect of fluid temperature to the motor size. Mostly, Vendor provided to size of motor at 40 deg C to be 112kW (150hp). However, as per our client the fluid temperature shall be used is 60 deg C. Again, the pump vendor have size the motor to 160kW (200hp). My question...
  8. Askarel27

    Electrical Ground Bus Bar

    Is it mentioned in any standard to provide Ground Bus for Electrical in a Electrical room. Can someone provide me standard reference regarding ground bus bar for electrical.
  9. Askarel27

    Ground Fault Setting

    In any electrical code, is their a limit that the setting of a ground fault protector to be maximum say t(s)= 1.0 and I(g)= 1.0 . Is their any calculation? The breaker rating is 150A. see attached. Our inspection is asking a setting...
  10. Askarel27

    NEC understanding about continuous load that have been decreased by demand load?

    This question is for code book understanding. Article 220 is reasonably clear as to the definition of continuous and non-continuous loads and how they affect the size of feeders and services. My question is, "How does the NEC expect the designer/engineer to treat the loads that have been...
  11. Askarel27

    tripping of main feeder breaker 150A trip when the UPS is pre-commissioned.

    The main feeder 150AF/150AT is installed in a outdoor switchrack has a 150a ground fault detection feature (EATON ELJBN3150W). It is supplying a UPS (10kVA, 480V) inside a building from a 100AF/30AT circuit breaker. The ground fault unit setting at the switchrack is t(s) = "1.0" and the Ig (A)...
  12. Askarel27

    34.5KV XLPE cables for Low Voltage Application

    Contractor has a 34.5kV 1C x 300sqmm Cu/XLPE cable in their warehouse and suggested to used it in a 600V/1kV application. Is this possible?
  13. Askarel27

    Soft Starter Rating for 700hp 4.16kV Motor

    Our Client is adding 700hp 4.16kV Squirrel Cage Motor for Compressor. Then Vendor quote 400A Bus rating and Current Rating is 110 A. How is the Soft Starter rating is selected? Is their a chart or code define the sizing of the Soft Starter Controller. Please help Additional Data: Motor is S1...

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