Podcast
Questions and Answers
What is included in the Supplier's Scope of Work?
What is included in the Supplier's Scope of Work?
- Design, material selection, manufacture, inspection, testing, stamping, and delivery (correct)
- Design, testing, and commissioning only
- Custom clearance and delivery only
- Only material selection and manufacture
What is the Supplier responsible for?
What is the Supplier responsible for?
- Only the design and manufacture
- Only the inspection and testing
- The design and delivery
- The design, selection of materials and components, manufacturing, and testing (correct)
What is the Supplier's responsibility regarding drawings and documents?
What is the Supplier's responsibility regarding drawings and documents?
- The production of all drawings and documents related to the electrical equipment and materials (correct)
- The production of all documents related to the electrical equipment only
- The production of all drawings only
- The production of all documents only
What is required as per approved Vendor list for electrical equipment and materials?
What is required as per approved Vendor list for electrical equipment and materials?
What does the Supplier's Scope of Work include if not all works and required material are expressly mentioned in the specification?
What does the Supplier's Scope of Work include if not all works and required material are expressly mentioned in the specification?
What is the purpose of including a positive 10% performance margin in the calculation of power required for all design cases?
What is the purpose of including a positive 10% performance margin in the calculation of power required for all design cases?
Why should the thyristors employed be sized to ensure that the maximum current flowing through them does not exceed 70% of their continuous rated current?
Why should the thyristors employed be sized to ensure that the maximum current flowing through them does not exceed 70% of their continuous rated current?
Why is it important to select the maximum watt density on the element surface to ensure no degradation of the process fluid/gas?
Why is it important to select the maximum watt density on the element surface to ensure no degradation of the process fluid/gas?
What is the purpose of verifying the element surface temperature and pressure drop across the heater using an industry recognized process design simulation package?
What is the purpose of verifying the element surface temperature and pressure drop across the heater using an industry recognized process design simulation package?
What requirement must be met for heaters to be designed to operate reliably at the maximum voltage?
What requirement must be met for heaters to be designed to operate reliably at the maximum voltage?
What is the design life requirement for the equipment mentioned in the specification?
What is the design life requirement for the equipment mentioned in the specification?
How should the power of each heater be controlled according to the specification?
How should the power of each heater be controlled according to the specification?
What should the capacity of the transformer feeding the heater be, in relation to the kVA rating of the heater?
What should the capacity of the transformer feeding the heater be, in relation to the kVA rating of the heater?
What type of control should be used instead of burst firing control for large loads fed from relatively weak supply systems susceptible to electrical disturbances?
What type of control should be used instead of burst firing control for large loads fed from relatively weak supply systems susceptible to electrical disturbances?
What must the design ensure regarding the mechanical stress and fatigue on the heater elements?
What must the design ensure regarding the mechanical stress and fatigue on the heater elements?
What is the purpose of utilizing a combination of fixed elements and a variable element in an electric heater?
What is the purpose of utilizing a combination of fixed elements and a variable element in an electric heater?
In what configuration should the load be set for a large electric heater?
In what configuration should the load be set for a large electric heater?
What protection measure should be included for the thyristors in an electric heater?
What protection measure should be included for the thyristors in an electric heater?
What type of input signal is required for the control circuit of an electric heater?
What type of input signal is required for the control circuit of an electric heater?
What is necessary if parallel operation of thyristors is required and approved by the company?
What is necessary if parallel operation of thyristors is required and approved by the company?
