Electric-Light
Senior Member
Look up the schematic for microwave oven door interlock. It's an ingenious and probably the most aggressive protective mechanism in use.
GFCI after dimmer??
- Thread starter mint402
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Look up the schematic for microwave oven door interlock. It's an ingenious and probably the most aggressive protective mechanism in use.
I wasn't suggesting dimming the receptacle. Have the receptacle at full voltage and put the dimmer on whatever is plugged into it.
SG-1
Senior Member
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- Ware Shoals, South Carolina
I tested one of the old, not self testing, models made by P&S. The GFCI stopped working at 103 volts with the external plug in type recp. tester.
I presumed that at 103 volts the test circuit was not passing the required 4-6 mA.
I did not try to simulate an actual fault at low voltage or use the built in push to test. Maybe later this evening.
kwired
Electron manager
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That is too logical, besides the customer wants to have the dimmer elsewhere
SG-1
Senior Member
- Location
- Ware Shoals, South Carolina
Leviton GFTR1-KI
Leviton GFTR1-KI
Push to Test Button worked at zero volts !
No reset.
The voltage source for this test was a normal sine wave provided by a variable auto-transformer.
Voltage was measured by a Fluke 289 in Low Z mode.
I will use a dimmer later this weekend.
Using a 1000 ohm resistor as a ground fault:
Unit tripped down to & including 50 Volts. Below this voltage threshold it tried, but could not release the latch, just growled.
Reset was functional down to 78 volts.
Leviton GFTR1-KI
Push to Test Button worked at zero volts !
No reset.
The voltage source for this test was a normal sine wave provided by a variable auto-transformer.
Voltage was measured by a Fluke 289 in Low Z mode.
I will use a dimmer later this weekend.
Using a 1000 ohm resistor as a ground fault:
Unit tripped down to & including 50 Volts. Below this voltage threshold it tried, but could not release the latch, just growled.
Reset was functional down to 78 volts.
SG-1
Senior Member
- Location
- Ware Shoals, South Carolina
Using a Leviton Dimmer DSL06 600W INC /300W LED / 300W CFL for the voltage source:
The Push to trip operated, but the device would not reset at full voltage.
Full voltage out for the dimmer was around 108 volts.
Reconnected the unit to normal line & reset (by-passed the dimmer). Reset at 78 volts as before.
The unit tripped down to 50 volts on a ground fault as before.
The above tests do not prove the GFCI could or should be operated in this manner. They only prove the GFCI can operate for a short period of time in this manner & you only get one trip, because it will not reset while powered by the dimmer.
The shape of the input wave form did not matter to the trip circuit so long as the RMS value of the voltage was present.
The shape of the wave form did matter to the reset circuit.
Electric-Light
Senior Member
I would've expected the other way around. The reset/arm is usually purely mechanical and arms the spring. The test/trip is a trigger that causes the spring to briskly split the contacts apart. Can you make a quick video flick of activating and cancelling peak max on 289?
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I believe that the newer self testing units use a mechanical-only TEST button and the 6ma threshold is checked during the self test initiated by the RESET button.
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SG-1
Senior Member
- Location
- Ware Shoals, South Carolina
PM me, so far, I understand you would like a video that shows how to use the min/max function for voltage showing how to reset the peak ?
brantmacga
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- Georgia
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- Former Child
I've been seeing RF receps online that are standard configuration AND dimmable; good to know they are changing this.
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