Yes David;
The voltage drop from the knife blade to the incoming lug and from the knife blade to the outgoing lug.
Each switch will have 6 points of measurement.
Look for outliers.
The test is done CAREFULLY with the switch closed and under load.
It depends.
My method:
I measure the milli-amps milli-volts across each contact area and measure the Amps.
Then I calculate the joint resistance in Ohms and the watts loss in the joint.
I use a switch with higher current and lower resistance as a benchmark.
Watch for black copper oxide...
Dress the fixed contacts. If the fixed contacts are not making good contact over a sufficient area local heating may cause welding.
What amperage are you running compared to the solenoid rating?
Contact welding is often associated with higher than rated currents.
A starter has almost no...
LEDs work on DC, right?
Power factor is the cosine of the phase angle.
There is no phase angle on DC.
The power factor seen by the utility is caused by the LED driver, and how much the manufacturer spends on the driver circuit..
Three phase on a VFD versus a single phase motor;
Less points of failure on a three phase motor compared to a single phase motor.
Lower starting surge with a VFD.
More breakaway torque to overcome sticktion with a three phase motor compared to a single phase motor.
Even more breakaway torque to...
If there are transformers or reactor coils dropping the voltage for the LEDs that may be the source of the poor PF.
Also, is this displacement PF or distortion PF?
It appears that the driver may be more to blame for poor PF than the LED itself, but considering the non-linear nature of diodes...
Most of the switches in an MCC should be fine. Clean and lubricate any outliers.
Once those are taken care of, you can lubricate all switches.
By the way, don't forget the influence of current.
Lightly loaded switches will run much cooler than switches loaded to their rating.
Don't forget I2R
I would hesitate to use Penetrox on moving parts.
Penetrox is not a lubricant, it is a joint compound.
From the Penetrox data sheet:
The zinc particles help penetrate the ubiquitous oxide film on aluminum, but may lead to accelerated wear on switch blades.
For an application where the switch is...
Some common pumps use a flooded case and a venturi.
The impeller drives case fluid through the impeller back into the case.
As the impeller draws in fluid, the pressure builds in the case and fluid is forced out the discharge,
These pumps will handle much more entrained air than a straight...
There is no need for protection.
In the case of a short circuit the current will be to little to do any damage.. The thermo-couple just won't work and the gas won't turn on.
In the case of an open circuit the voltage will be to little to pose any danger. The thermo-couple just won't work and...
Sorry. No actuator.
No circuit board.
Google thermo-couple.
The copper tube is actually a co-axial cable.
The different material inner conductor is a different material from the sheath.
Atemperature difference between the hot end and the connection end will develop enough EMF/current to hold in...
If it works it's okay.
No safety issue.
If it shorts there is not enough current do do any damage.
If if goes open, the gas won't turn on.
To test, put the hot end in a flame and check for either voltahe or current at the connector. There should be a potential between the center contact and the...
