WE are using a 63A MCCB(SIEMENS MAKE) for one of the feeder in LV substation panel.It is supplying to a lighting & power socket DB.Settings in the MCCB is Ir = 63 * 1 , Isd = 8 times of Ir , tsd = 0.5 sec( I2 t off). Sometimes this MCCB is tripping .But no trip in DB MCB. Can anybody tell me reason ? From where i can know about the MCCB settings?
5 9572What is the difference between double compression
Bhel, Hyundai, Orchid Chemicals and Pharmaceuticals, PDO, Prefamac,
7 56577Why PT voltages are measured with respect to ground? What do u mean by voltage or current polarized.
1910Post New Electrical Engineering Questions
What is the settings of distance protection relay in 400 kv line
whatis the commertial spec. of distribution boards ?
I need HT sphere gap calibration table. Can any body help me.
Explain the operation of grid connected central solar inverter ?
HOW TO WORK A VFD?SAY SIMPLE METHOD
Can u Explain about the electronic trivector meter and the use of data converters in them?
what is the function of choke in the flourcent tube lights and why the colour is in white mostly in flourcent tube lights
what is the path of thunderlightening? once both a buffalo and a person were standing 5m apart but lightening hit and killed buffalo not person?
What are the operation carried out in thermal power station?
Write a note on materials used as a fuse element.
I am designing new project sub station with 220 kV / 11 kV, 40 MVA capacity. This project have many recifier sets, which can generate 3rd harmonics. Now I have to select vector group of This transformer. To minimise 3rd harmonics, what care should I take in selection of Transformer Vecrtor group? If it is Y-Y with open Delta tertiary then what should be the rating & voltage of Tertiary Winding?
What will be the output voltage of a transformer if it is primarily energized from a square wave voltage source?
why we setting 95 deg and 105 deg in wti and oti of distibution transformer ? give the reson for that ?
when generator short circuit condition, the current how dissipates. or at short circuit voltage not available then current how can flow?
When are the directional relays used?
