What is the main disadvantage of phase advancers?
Answer : In split phase motor main winding is of thick wire placed at the bottom of the slots.
Answer : The main disadvantage of the Ward-Leonard control method is high initial cost, high maintenance cost, low efficiency at light loads.
Description : Write one advantage and one disadvantage each for spring control method and gravity control method.
Answer : Advantages of Spring Control Method: 1) The spring-controlled meters may be used in any position. 2) In some instruments, springs can be used as current leads. 3) As springs are light in weight ... only. 2) Scale is non-uniform. 3) Control weights add to the weight of instrument.
Description : List one advantage and one disadvantage of one wattmeter method.
Answer : Advantages: 1) Only one wattmeter is used. 2) Less number of connections. 3) Cost required is less. Disadvantages: 1) Used only for 3- Φ balanced load and not for ... be accessible for connecting the Pressure coil. 3) Delta connection must be opened to connect current coil.
Description : What are the main electrical equipment used in HPS ? State the function of each parts of it in brief.
Answer : Following Main Electrical Equipment used in HPS & their function: 1. Alternator 2. Exciter 3. Transformer 4. Switchgear Function : 1) Alternator:- Alternator is coupled to ... part from the healthy section. It contains circuit breaker, relays, switches and other control devices.