Bad workmanship, Electrical Engineering

Bad Workmanship

Bad workmanship contributes importantly towards increasing distribution losses. Efforts should, thus, be made to have the best probable workmanship. In this context the following points should be borne in mind:

i) Joints are a source of power loss. Thus, the number of joints should be remaining to a minimum. Proper jointing methods should be used to ensure firm connections.

Quite often joints are made through wrapping the conductors along with GI wires. In case PG clamps are used, the PG clamps should be of adequate size and GI nuts/bolts with spring washers should be used. All PG clamps required a re-tightening after around 1 year as the clamps become loose and a layer of coating gets deposited in the contact surfaces. It is, therefore, best to have sleeve joints and crimp the joints along with a crimping tool.

Although making the joints, the two ends of the cut out stranded conductor will tend to get loose. The recommended practice is to wrap the loose ends tightly using GI wire before making a joint. Loose strands are frequent a cause for heating and related damage. For mid-span joints, tension jointing of bundles in mid-span must be prevented. At erection, while a choice exists, the bundles must be joined at the non-tension bond position of a pole top. For shackle joints, the jumper connector at shackle points is better along with PG clamps other than it is advisable to use crimped or fire wedge connections.

ii) Connections to the transformer bushing-stem, isolator, drop out fuse, and LT switch and etc. should be periodically inspected and proper pressure managed to prevent sparking and heating of contacts.

iii) Replacement of deteriorated services and wires should also be made in a timely manner to avoid leakage and loss of power.

 

Posted Date: 2/6/2013 6:07:05 AM | Location : United States







Related Discussions:- Bad workmanship, Assignment Help, Ask Question on Bad workmanship, Get Answer, Expert's Help, Bad workmanship Discussions

Write discussion on Bad workmanship
Your posts are moderated
Related Questions
Q. What do you mean by Conductors and Insulators? In order to put charge in motion so that it becomes an electric current, one must provide a path through which it can flow eas

it''s 3 assignments and each assignment have 7 questions so each assignment have 1 hour when I open it I have only 1 hour to finish it I can show him or her the practice question t

Explain the working principle, Surface finish, material removal, accuracy,advantages and application of Electrochemical Grinding(ECG). (a) In electro chemical machining of pure

Q. Using two 8-to-1multiplexers and one 2-to-1multiplexer, show how a 16-to-1 multiplexer can be obtained in the form of a block diagram.

Q. Common-Drain JFET Amplifier? Figure (a) shows a CD JFET amplifier in which resistors R 1 , R 2 , and R SS are selected by the bias design, and capacitors CG and CS are chos

Q. Show the Overall output limitations of Speed Control? The overall output limitations are as shown in Figure. With base speed defined as the full-field speed of themotor at t

Develop and execute a program to analyze the circuit shown in Figure (a), and use PROBE for plotting v C (t).

Add Register and Carry with Accumulator The contents  of register R and the  carry flag are added to the  contents of the  accumulator  and result of  addition  is also  sto


Explain the meaning of Synchronous Counters? In the synchronous counters the clock inputs of all the flip-flops are connected together and are triggered by the input pulses, the