if we have 380 KVA DG. how to calculate Power Factor. With detailed formula1 4498
why ht11kv supply needs discharging during shut down time1 2424
What is corona? and what is the purpose of corona belt in substation ? why they connect these end of the buses ?2 4841
What are the difference between CT/PT operated Meter and RRAMR Meter for HT/LT application?1415
why rating of generator is kva but motor is kw ?4 9947
how to identify small motor and generator?1 2731
what safety use in electrical panel3 4374
What is class X ct? What rare its uses?2 4248
1.What do you mean by inductive and capacitive parts of an electric circuit. 2.What do you mean by decrease of inductane and capacitance of a network? Please dont give me the text book answer.3. What is class X ct and its applications?2 2712
list the type of vfd? wich is sutable for heating kiln?1157
How to calculate & connection of 900KVA generator 2 sets & load(1500A)? How to choose cable size and ACB size for this load & generator? please explain me detail. Regards, Mr.Han3 8226
working principle of AC Servo Motor with its construction
what is IP65 & What is its advantages1 3370
how to reduce the transformer size in ups ?2 3588
Why efficiency in thermal power plant is low?
Anybody know how schematic diagram for reverse power relay? RPR for generator protection
HELLO EVERYONE, I RECENTLY HAVE FOUND ONE PROBLEM, I WAS TAKING NO LOAD TRIAL OF AN HT MOTOR 920 MOTOR , 1440 RPM , 6.6 KV, WITH AUTO TRANSFORMER. AT 450 V, LOAD WAS 40 AMP AND SPEED WAS 250 RPM. BUT AS WE INCREASE VOLTAGE FROM 450 TO 480V, LOAD BECOME 41 AND SPEED REDUCED TO SOME RPM . SO WHICH PHENOMENON ACTED HERE FOR REDUCING SPEED.?? AND IS IT HAPPENING ALWAYS OR IT IS RARE? I ALSO HAVE FACED SUCH PROBLEM WITH FEW LT MOTOR ALSO.
Can any one give an explanation about rating factors of cable? if we are laying the cable on the air with an temp 15 degree then rating factors will be 1.15 and if we are laying the cable on the air an temp 60 degree then rating factor will be 0.76 please describe it and what is the difference between rating factor and derating factor?
what is the voltage rating of chiller unit sensors
What is speed mode?
A 400 V, 50 Hz, Δ connected synchronous generator has a field reactance of 0.1 Ω and armature resistance of 0.015 Ω. At full load, the machine supplies 1200 A at 0.8 pf lagging. Under full-load conditions, the friction and windage losses are 40 KW and the core losses are 30 KW. What is the machine’s overall efficiency? Ignore any field circuit losses.
What is I to C?
Shall I use 40A semiconductor Fuses in 32 A SFU ? Frame size is same. What Happen if Fuses burn on SFU?
How many types of losses occur in a transformer?
What is the difference between isolators and electrical circuit breakers?
How to derive detailed design of Suitable bus Bar for 100A for 6.6KV?
What is the function of under voltage release ?
describe the Tranformer testing procedure
how current is reverse from its normal direction during the fault?