Topic :: Insulation
Insulation value of conductors with reference to earth is mentioned in (a) Ampere (b) Resistance (c) Voltage (d) Wattage
4 4559We know that, in case if there is a faulty insulation,or sc, the current is bypassed to earth through the earth wire that has low resistance.Actually, what will happen to that current that flows through gnd?In that case,if we come in contact with that faulty appliance, wont that current flow through us as we form a closed path by standing in gnd?Is grounding a safety measure?
3 5114how much insulation resistance 11kv & 33kv under ground cable between earth to phase & phase to phase.
4 276424-Why we measure the insulation resistance of main core and frame in spite of that must be connected with ground before energize the transformer?
3 10013-What should be minimum value of insulation resistance and maximum value of earth resistance at any electrical instillation and what is method of testing the same.
1581Why is shaft current insulation required on large motors & when should it be checked i.e. before or after assembly?
2 4168
What is the meaning of Insulation H for transformers????
7- What is the Dissipation Factor and the difference between it and Insulation Resistance Test? 8- What is the task (function) of DC and AC reactors in power plant? 9- What is the task (function) of (open delta with earthed) in some types in transformers? 10- What is the base of the selection of the vector group in transformers? 11- What is the zig-zag transformer and its function by drawing in large detail? 12- What is the polarity ? 13- Why we make short between phase(R) in high side and phase (r) in low side in vector group test? Where High Side ( R ,S and T ) and Low Side ( r ,s and t ). 14- What are the time on delay and time off delay? 15- What is the vector group? 15- What is the task (function) of different types of vector group such as Dyn11 , Dd0 , YNd1,……..,?
does any one know where we can purchase insulation oil for high voltage oil filled cables
-What should be minimum value of insulation resistance and maximum value of earth resistance at any electrical instillation and what is method of testing the same.
The D.C. spark test is applicable to single conductor cable & assemblies of insulated single conductor cables without insulation shield,metallic sheath or metalic armor?
Is it possible to measure correct value of earth resistance & cable insulation ristance with out disconncting earth lead & both sides of cable ends? If not, any other method to measure ER & CIR with out disconneting from the system.
what are the basic insulation levels & what its Unit
What are the insulation standerds for eg H clase and how many insulation standerds are there and its standerds??????
ho can we calculate the conductor insulation value according to their ratings like voltage,current etc.how insulation value related with voltage,current and power of amachine
Which Class insulation is prefered for the sandwich Busducts ? Why?
how to find 5 kilo meter long under ground 33 kv cable fault location if IR VALUE shows 0.05 M ohm @5000 volt.and cable fault locator shows some time fault distance 3 kilo meter ,3.7 kilo meter and some time 1 kilo meter? now how to find the fault location that where is leakage. note--it is tested with 5000 kv megger and insulation resistance is 0.05 M ohm. and some time 0.03 M ohm comes.
WHAT IS MEANT BY INSULATION CLEARANCE IN VACCUM?
how can motor both beasrings insulation resistance can be check?
what is program data insulation in dbms?
Why insulation level follows this order? transformer < bus bar < circuit breaker & Isolator < transmission line.
