Best Rated threads in ⏚ Electrical Engineeringshow all threads
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demand of Reactive power at motor stalling
I have a question about the demand of Reactive power at motor stalling. It is always mention that "reactive power demands of load increase with motor stalling". However, should it be the other way...
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16 years ago
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Blowing Light Bulb..
Hi, An interesting thing happened in the drawing room tonight.. a standard 40W incandescent lamp failed as I switched the room lights on. What I saw was a bright flash and a red/white hot something...
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16 years ago
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Ampere turn diagram
Hello Guys I've been looking at some old engineering documents that relate to the calculation of transformer reactance, it goes on to explain the use of ampere turn diagrams as an aid to reactance...
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17 years ago
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Mechanical Drafting for Dummies?
Please forgive me if this post is off-topic. I've been retasked from tech writing for a special project, creating dimensional drawings for a metal fab shop. I have Corel Draw X3 and Corel Draw 9...
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17 years ago
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The rotor shaft is loose as a goose.
I have this induction motor, the rotor shaft is attached to the rotor core with an interference fit, the shaft is cooled and the core is heated and then they are pressed together. My problem is that...
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17 years ago
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7 | |
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led belt buckle hack
Bought one of those LED belt buckles...not to wear! I want to hook it up to a serial line and control it from a pc. My hope was that there were some dev points on the board that I could tap into....
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17 years ago
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8 | |
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Corroded Neutral Lug on main meter socket
I have recently experienced issues where high amp devices will dim the lights considerably (even resetting some appliances - phones, computers, etc.) I had the utility company come out and he removed...
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17 years ago
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14 | |
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SIMPLE WIRING DIAGRAM / VOLTAGE HELP?
PLEASE EXCUSE THE CAPS...... AT MY FACILITY WE JUST PURCHASED A NEW FILTRATION PUMP FOR A LARGE POND WE HAVE. ITS A 5 HP MOTOR THAT I ORDERED THROUGH A SALESMAN THAT UNDERSTOOD WE HAVE 3 PHASE 480 AT...
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17 years ago
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12 | |
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Replacing brushes
People, I'm not sure if this is the best group for my query but I'lll give it a try. I have an electric lawn mower that was made by Sears way back in 1975. The nameplate rating is 120VAC - 10A. No...
8
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17 years ago
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8 | |
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How test LED?
I have a light consisting of one super-bright white LED which plugs into the USB port of my PC. It was flickering and now does not illuminate. The supply leads to the LED are delivering 5v from the...
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17 years ago
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34 | |
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rewinding a motor
I have a 5hp capacitor start motor from an older radial arm saw. The part is no longer available from the manufacturer. I had the motor tested and was told that the starter winding is blown. The...
14
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17 years ago
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15amp thermostat on a 20amp circuit breaker?
Hai I'm wondering if I can install a 15amps thermostat on a 20 amps circuit breaker? right now my baseboard heat will use like approximately 1500 watt. This is what I'm trying to do; I'm trying to...
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17 years ago
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software for Reliance MaxPak III DC Drive
Does anyone out there have the communication software to permit a PC to talk to a MaxPak III S6 drive. The owner's manual states that the filename is "MONMP3.EXE" Thanks, Craig Dieter...
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17 years ago
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Compound-source static exciter analysis
Hi, i am currently analysing a static exciter setup of which i included the following link to the schematic: is a compound-source exciter, e.g. power to the generator field is delivered by a voltage...
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17 years ago
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Actual Ampacity Rating ROMEX SIMPull Type NM-B in a residential attic.
Please help me keep from tearing my hair out. I am installing a subpanel in an existing, small 22 by 8 foot (176 sqft) addition to my home. The original wiring was not done to code and has since been...
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17 years ago
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Hum in Conduit
I posted a question earlier and received a bunch of helpful answers and tried them all and still a hum. I have realized that I am only running black or "hot" wires in this conduit with the white...
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17 years ago
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Nana Electronics power module ID?
Nana Electronics Co., LTD power module in DC motor controller is in series with H-bridge thermistor and both are in series with AC mains and motor load. Label on module says "MC-0005G". Any idea where...
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18 years ago
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2005 NEC Table 310.16 Online Calculator for electricians and electrical designers
I have completed the online Table 310.16 wire size, ocpd, and voltage drop calculator. I can't find anymore bugs but maybe you can. It took me about 10 weeks during the last 10 years to build this...
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18 years ago
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7 | |
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replacing a varistor
I need to replace a varistor on a circuit board and I cant find any markings on a good varistor still on the board. The board consists of several triac circuits which all operate the same type of...
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18 years ago
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The dangers of using too many volts and amps from a power adapter
Hello, I recently received a motorized telescope that runs off of 8 AA batteries. A power adapter is available but I have yet to find one available and my local telescope stores. The power...
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18 years ago
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