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How we connect a analog ammeter for three phase current measurment upto 15 Amp. without CT with a rotery switch (Amp. selector switch)

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skychief2001
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SOURCE: how to measure battery current using analog ammeter

This is the car and truck section, so you may want to ask this in a different section.
You can only measure current as it moves thru a circuit. You can measure voltage in a contained space with a volt meter.

Posted on May 30, 2013

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SOURCE: How to measure battery Current using ammeter!!

Current is the flow of electrons from positive to negative and the amount of current (amps) is the rate that electrons flow. Voltage is the pressure that makes the electrons flow. So you can measure the pressure(voltage) with you multimeter and you can measure the flow (amps) with an ammeter but you cannot measure what is not in the battery.( No flow)

Posted on Jun 01, 2013

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IF I SET UP AN AMMETER TO MEASURE CURRENT ENTERING BATTERY, WHAT WOULD I EXPECT TO READ


I wouldn't assume your figures, at (a nominal) 6v that puts the lamp wattages at 7.5 watts each, at 12V around 15W each, both very low.
Given your figures the total current is 2.4, but in the real world it would be around 7.5 to 8 amps with a 12V system.

Jun 22, 2014 | New Complete 7" Headlight With Ammeter...

1 Answer

How to measure battery Current using ammeter!!


Current is the flow of electrons from positive to negative and the amount of current (amps) is the rate that electrons flow. Voltage is the pressure that makes the electrons flow. So you can measure the pressure(voltage) with you multimeter and you can measure the flow (amps) with an ammeter but you cannot measure what is not in the battery.( No flow)

May 30, 2013 | Ammco Combination Disc/Drum Brake Lathe

1 Answer

How to measure battery current using analog ammeter


This is the car and truck section, so you may want to ask this in a different section.
You can only measure current as it moves thru a circuit. You can measure voltage in a contained space with a volt meter.

May 30, 2013 | Cars & Trucks

1 Answer

New battery went dead. pulled the fuses and checked for a short. Found the fuse that shows a short just don't know what it goes too


A voltmeter is NOT the correct tool to check for an "ignition-off draw". A voltmeter will show 12 volts if ANYTHING is operating.

There are some things that are SUPPOSED to keep operating when the vehicle is shut off. These include, but are not limited to:
> Powertrain Control Module keep-alive memory
> Radio preset memory
> Clock
> Security/ alarm system
> Remote control recievers (door locks, etc.)

What you need to know is how many AMPS are being drawn from the battery when the vehicle is shut off. This is done by using a shunt bar connected between the battery terminal and the battery cable connector.

Set the ammeter to the lowest setting (usually 2 or 5 amp scale) Connect the ammeter leads accross the shunt bar. Turn off all electrical accessories, ignition switch, etc. and wait for a minimum of 45 minutes for all of the computer systems to go into "sleep" mode. Then open the shunt bar and read the amperage.

The "rule of thumb" is 300 milliamps (or 0.3 amps). This is where you have a problem. Anything less than this is not a problem and is not the cause of your dead battery. My experience is that most vehicles built in the last 15 years or so, will usually measure around 150 milliamps if there is no aftermarket equipment installed. Please note that even this 150 milliamps will measure as 12 volts if measured with a volt meter. A 2 amp draw will also measure as 12 volts....However, a 2 amp draw will kill your battery overnight and the 150 milliamp draw won't.

May 22, 2012 | 1999 Jeep Cherokee

1 Answer

How do I switch the wiring for a Garland Model S 686 -2 Stove from Single Phase to 3 Phase?


If the oven is a three phase oven currently wired on single phase there will be three active terminals at the terminal block. There will be links or bridges which connect the single phase to each of these active terminals. Remove these links and connect each phase to each terminal.

Feb 24, 2011 | Garland S686 Electric Kitchen Range

1 Answer

A voltmeter should be connected in a series with a component?


A Voltmeter is connected in parallel with a component because in voltage mode it has a high impedance and measures the voltage drop across the component being tested and does not affect any parts of the circuit.
An Ammeter on the other hand is connected in series with a component because in current mode it has a low impedance and measures the actual current through the component being tested

Nov 20, 2010 | Mbt ZTS Inc. Mini-MBT, Mini Multi-Battery...

1 Answer

How do you calculate low phase voltage of a three phase four wire system without useing voltmeter?


u can take three incadescent bulbs of same rating, connect them in 3 phase star connection, means 3 phase 4 wire connection..connect it across supply..the bulb connected across low voltage phase will glow dimmer than other two

Jun 19, 2010 | Zenith ZTG Nema-3R, 400 Amps Three Phase,...

2 Answers

Something drains the battery . I've put in new alternator, still something electrical drains the battery.


to find the draw Switch off all electrical loads such as lights, radio equipment, auxiliary equipment and make sure the vehicle ignition system is turned off. Remove all ground paths from the negative battery terminals. Connect a jumper lead from theground cable to the negative battery terminalYou are now feeding the electrical current requirements of the entire vehicle through the jumper lead. Do not activate any other electrical equipment while the jumper lead is supplying the vehicle current. Wait five minutes to allow all electrical devices to shut down and go to standby mode. While waiting for the vehicle electronics to go to sleep, set up a digital ammeter, such as the Fluke 88to read amps (automatic scale) and make sure the test leads are plugged in to the correct connectors to read amps (COM and A). Connect the COM ammeter lead to the negative battery stud and the positive lead to the connected ground cable After five minutes with the jumper and the ammeter connected in parallel, remove the jumper lead from the three connected cables to the negative battery stud as shown in Figure 3. The vehicles entire current requirements (parasitic load) will now be going through the ammeter. Read the current flow in milliamps. Remember that 1000 milliamps is equal to 1 amp. If the readout has ma after the reading youre measuring milliamps, if the readout has A after the reading youre measuring amps. If at any time during this process the current flow is interrupted (a connector falls off) you must begin again with the jumper connected for five minutes before attempting to remove it leaving the ammeter passing all current and measuring the parasitic load, Under normal conditions, while parked, a vehicle equipped with a standard electronics package should be drawing less than 50 milliamps. If the parasitic load is more than this the vehicles battery storage life will be shortened. If excessive current draw is observed, remove the fuses one at a time until a significant current drop is noted. Do not pull and reinstall the fuses as this may wake up some circuits and cause excessive surge current through the meter. Make note of fuse locations as they are pulled so they can be reinstalled in the proper fuse panel location when testing is complete. When high current draw devices are isolated consider relocating their power feed from a power source that is inactive when the ignition switch is turned to OFF. Sorry So long but hope it helps

Mar 06, 2010 | 1996 Chevrolet Express

1 Answer

Make a connection of a 6-leads, 3-phase motor in delta and wye connection


connection would be easier in the wye. single phase current is easier to pull of of one leg in the wye to get your common that you would not have in a delta connection. three phase doesnt require a nuetral. just 3 phase 120degrees out of phase from each other

Dec 04, 2009 | Electric 1HP Century Single Phase Extra...

1 Answer

My 2004 GMC Sierra 1500 has been losing battery charge


Try to locate the cause of the discharge current as below:-

While vehicle electrical system shutdown as for overnight storage, connect an ammeter (with suitable current capacity and sensitivity) across the main ground connection between the battery -ve terminal and vehicle chassis/frame - (-ve of the ammeter to -ve battery terminal post, +ve to vehicle frame),
Carefully disconnect the main battery ground cable from the chassis,
The ammeter will now measure the battery discharge current - a discharge current in the order of 0.5 amp or more is of concern.
If all is well, the current draw should not exceed 50- 100 mA.
Note- Do not switch on any load while ammeter is connected, as ammeter damage or overload will occur.
If an excessive discharge current is observed, remove all fuses etc to eliminate / locate cause.

Oct 14, 2009 | 2004 GMC Sierra

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