- With reference to the Electrical Circuit Diagram:
(a) state the purpose of this circuit;
(b) describe the functions the areas marked within the dotted lines numbered 1, 2, 3 and 4.
- With reference to storage batteries, explain EACH of the following:
(a) the term UPS;(3)
(b) the operation of an inverter, stating why it may be required;(4)
(c) the term 150 Ah.(3)
3.
(a) Sketch the relationship between true power (kW), apparent power (kVA), reactive power (kVAr) and power factor (coso) in a.c. electrical generation.(4)
(b) Explain how true power (kW) and reactive power (kVAr) is shared between two generators connected in parallel.(4)
(c) State how kW and kVAr load sharing stability is achieved.(2)