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
You are asked to design a circuit that indicates if a 12 V battery has been connected the correct way around to two terminals, A and B. To do this, you have chosen to use a special

Q. Adiodewith the i-v characteristic shown in Figure is used in series with a voltage source of 5 V (forward bias) and a load resistance of 1 k. (a) Determine the current and t

Question: (a) The conversion of a time varying analog audio signal into digital form is carried out using an electronic circuit known as a (signal) encoder. Draw a labeled bl

Series circuit Total resistance, R T = R1 + R2 + R3 The current I is the same in all parts of the circuit , I = I 1 = I 2 = I 3 The voltage drop at each resistor, V1,

a) Include a Smoothing Capacitor to the Rectifier circuit and calculate the Output Voltage and Frequency b) Include a 47Ω Load Resistor and sketch the schematic diagram of the c

Shunt DC motor In this arrangement, the armature and field coils are connected in parallel (the motor is called 'shunt connected').     Analysis With refere


Q. Determine the voltage transfer function of the low pass filter circuit shown in Figure, and find the expression for ω 0 .

Define inductance.Explain the classification of inductors

Q.  Explain the measurement of frequency in detail by using Wein's bridge. Sol. The Wein's bridge is presented here not only for its use as an AC bridge to measure frequency