Microwave and converter fried at campground
Just got set up at a campground in Colorado Springs and I have a big problem. Everything seemed to be working correctly electrically initially but when we came back to camp I found the front air condi...
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SPST 120 coil relay
L1 or L2 through piezo annuniator to earth ground. Use NC contacts
L1 or L2 through RELAY coil then to L0 neutral
No connection relay coil no function. Contacts are closed but no alarm power
Connection with neutral. Contacts pull open breaking piezo circuit.
Disconnection from neutral but valid line connection. Relay contacts close enabling piezo annunciator.
Extremely low power device. Long-life relays are inexpensive. Unlimited power available from line to earth for annunciator. Searchlight. Air Raid Siren.
BTW a power management center or any surge suppression circuit can only protect in an extremely low-order lightning strike event. Even modest events will vaporize the most expensive consumer devices on earth. Spoken from practical experience.
L1 or L2 through piezo annuniator to earth ground. Use NC contacts
L1 or L2 through RELAY coil then to L0 neutral
No connection relay coil no function. Contacts are closed but no alarm power
Connection with neutral. Contacts pull open breaking piezo circuit.
Disconnection from neutral but valid line connection. Relay contacts close enabling piezo annunciator.
Extremely low power device. Long-life relays are inexpensive. Unlimited power available from line to earth for annunciator. Searchlight. Air Raid Siren.
BTW a power management center or any surge suppression circuit can only protect in an extremely low-order lightning strike event. Even modest events will vaporize the most expensive consumer devices on earth. Spoken from practical experience.
