Guys,
I've read about 50Hz running on 60Hz system and vice versa. We have a centrifuge machine coupled with a motor 415V, 3P 50Hz @ 1500RPM. Our system is 480V 60Hz, and we are planning to put up a step-down transformer at the motor in-feed to level the voltage at 415V. I've read that the...
Hi Guys,
Our receiving power is 69kV from our Utilty w/c passes thru our 10MVA 69kV/13.8kV Delta-wye Power Transformer. Our distribution voltage is 13.8kV. and Back-up Power is a 5 Units 2000kVA, 480V, 3P, Diesel Generating Sets which connected to our 13.8kV sytem thru 5 units Step-up...
Hi guys,
We purchase a Altas Copco compressor coupled to a Siemens brand motor with nameplate data, 750 kw, 460 volt delta, 60 hz, 0.88pf, nominal efficiency 95.8% Full load Amphere(FLA)= 1100 amps, Service Factor(SF)= 1.15, SFA= 1300 Amps, RPM= 1788, Insulation Class F, Temperature rise 40...
Hi, can someone explain to me this phenomena. We are connected to a 34.5kV Overhead T/L serving as our incoming power, distributed in 3-1MVA transformer, one in each 3 building. For the past years we haven't encountered surge arrester to blown out (fail). Last week during heavy rains one of our...
Hi, we have purchase a 2500kVA 13.8kV/440V Power Transformer connected delta-wye. The Primary High Voltage BIL rating is only 95kV... The Utility where we will connect the later is requiring a 110kV BIL at 13.8kV. Could someone explain to me the risk of installing a Transformer @ 95kV BIL to...
Is a 50mm2 XLPE Power Cable rated 230A can withstand a starting current of a motor with a magnitude of 640A for about 3-5 cycles? Is is possible for us to have a 10-15 motor start-up/day... The power cables is rated for 90C continuous operation and can carry a 250C short-circuit rating. Is there...
We are supposed to build a battery house with a 120V DC 60 units 2V 1000AH battery, However since we have a constraint regarding space, Is it possible that we make a Nema 3R Enclosure for this with a adequate ventilation. We are planning to use a maintenance free sealed type battery, Do we...
