Physics, electricity, engineering

AI Thread Summary
Using two different switches for low and high voltage sources in electric motors, such as lift machines, enhances safety and operational efficiency. Low voltage switches are smaller and easier to operate, reducing the risk of accidental activation. This separation also minimizes the danger associated with high voltage, making it safer for users. The design ensures that operators can control the motor without directly handling high voltage components. Overall, this dual-switch system improves both safety and functionality in electrical engineering applications.
wally25feb
Messages
6
Reaction score
0
Why do they use two different switches, one for the low voltage source and another for the high voltage source, to operate electric motors such as lift machines?
 
Engineering news on Phys.org
Welcome to PF!

It is easier to flip a low voltage switch than a high voltage switch because they are physically smaller
 
Thanks Russ.
Does it also mean it is safer ?
 

Thread 'Why does the amperage go real high if there is a low voltage short?'

I used to be an HVAC technician. One time I had a service call in which there was no power to the thermostat. The thermostat did not have power because the fuse in the air handler was blown. The fuse in the air handler was blown because there was a low voltage short. The rubber coating on one of the thermostat wires was chewed off by a rodent. The exposed metal in the thermostat wire was touching the metal cabinet of the air handler. This was a low voltage short. This low voltage...
View full post »

Thread 'How might electronics be different if AC voltage was 72V at 45 Hz?'

Hey guys. I have a question related to electricity and alternating current. Say an alien fictional society developed electricity, and settled on a standard like 73V AC current at 46 Hz. How would appliances be designed, and what impact would the lower frequency and voltage have on transformers, wiring, TVs, computers, LEDs, motors, and heating, assuming the laws of physics and technology are the same as on Earth?
View full post »
Thread 'How Does Jaguar's 1980s V12 Dual Coil Ignition System Enhance Spark Strength?'

Thread 'How Does Jaguar's 1980s V12 Dual Coil Ignition System Enhance Spark Strength?'

I have come across a dual coil ignition system as used by Jaguar on their V12 in the 1980's. It uses two ignition coils with their primary windings wired in parallel. The primary coil has its secondary winding wired to the distributor and then to the spark plugs as is standard practice. However, the auxiliary coil has it secondary winding output sealed off. The purpose of the system was to provide a stronger spark to the plugs, always a difficult task with the very short dwell time of a...
View full post »

Similar threads

Why does the amperage go real high if there is a low voltage short?
Replies
17
Views
285
Antique electric railway maintenance equipment
Replies
1
Views
429
How might electronics be different if AC voltage was 72V at 45 Hz?
Replies
29
Views
330
Mexico Voltage: 460V/60Hz to 127V Explained
Replies
5
Views
10K
Self excited induction generators and grid connected solar inverters?
Replies
9
Views
2K
Faraday disc voltage increase
Replies
3
Views
1K
Can Gyms Be Used to Generate Electricity?
Replies
1
Views
2K
Beginner circuits / ↓ the voltage & ↑ the efficiency
Replies
12
Views
2K
Relay Control of Induction Motors
Replies
5
Views
834
Importance of Science History for my Understanding of Science
Replies
10
Views
2K

Hot Threads

Recent Insights

Back
Top