Electromagnets and Hz

[Geno03245]

If a 125V AC 1/3 HP clock motor is located near 120V AC electromagnets, can the magnetic field cause the clock motor to run fast? Fast is 1 hour per week.

Can the electromagnets change the frequency of the circuit?

What would cause the clock to run fast?
The voltage to clock can be changed between 120V and 240V using dip switches, but the clock is 125V AC.

Close up of circuit with clock and electromagnets.
**broken link removed**

Clock attaches with 3 wires
http://waterheatertimer.org/images/aug--042-GE-clock-600.jpg
Back of clock module
http://waterheatertimer.org/images/aug--050-GE-clock-600.jpg
Back of circuit board:
http://waterheatertimer.org/images/aug--065-GE-clock-600.jpg
Close up of clock gears
http://waterheatertimer.org/images/aug--052-GE-clock-600.jpg

See external wiring
How to wire GE 15207 timer

 

[colin55]

The motor is a synchronous motor and detects the main frequency of 60Hz. It cannot run fast or slow.

 

[JimB]

If a 125V AC 1/3 HP clock motor is located near 120V AC electromagnets, can the magnetic field cause the clock motor to run fast?

If you mean the small relays in the timer box, no they will not affect the motor speed.

Can the electromagnets change the frequency of the circuit?

No.

What would cause the clock to run fast?

If the supply frequency was higher than 60hz, that would make the clock run fast.
Does this clock ever run on a supply from a local generator? or is it always powered from the grid supply?

Is the 1 hour per week error constant or does it vary?

Has this timer ever worked correctly, or is it a new installation?

JimB

 

[Geno03245]

The timer in question it the GE 15207 series
How to wire GE 15207 timer
GE-15207-clock

Intel reliability is working on the problem.
According to one guy who gave me feedback, he has a new GE timer installed by electrician at his residence. No generator. No interference source nearby. Ordinary residence. His neighbors don't have clock problems, etc. They are using the timer on 240V water heater.

The timer has dip switches to select voltage between 120, 240, 277
The clock motor shows it to be 125V AC, but I don't know if the markings are accurate

Get this... the ground wire does not connect to timer ... when there is 120V connected to timer, the 125V clock motor has a neutral and hot. That seems ordinary.
However, when 240 is connected to timer ... the 125 volt clock motor has no neutral wire or ground wire ... just the two hot leads from the 240V circuit.
So the electronics are somehow converting 240 Volt to run a 125V AC clock motor without a neutral wire or ground wire.

How is that possible?
And how would that play into the clock running fast?