Current Transformer
A current transformer with switch selectable 30, 60, or 120 amp settings.
Clamps Around Existing Cable
Current transformers clamp around a single current- carrying wire and transform the amperage into a 0 to 5 VDC signal suitable for input into the I/O ports of a WeatherGoose Climate Monitor.
Each WeatherGoose Climate Monitor (except the MiniGoose) contains a three-port I/O connector, called the “C123C” port. Up to three individual current transformers can be attached to this port. If more are required, a CCAT serial bus interface can be added. Up to 16 CCATs can be added to the serial bus.
The current transformer uses swing-open jaws to clamp around a current carrying wire. Note that a single wire is necessary for current measurement. If two wires are placed in the transformer, their magnetic fields will cancel each other and the current measurement will not be accurate.
Self-powered, Linear Output
The transformer is manufactured by Flex-Core and further specifications are at: http://www.flex-core.com.
No power supply is required; the transformer is parasitically powered from the line current.
The sensors connect to the WeatherGoose with 24 AWG solid copper wire. Runs of over 100 feet can be used.
The output is linear. Note that the current values displayed are 0 - 100 in the WeatherGoose. If a CCAT interface is used, a current range can be specified.
Specifications
Range: 0 to 30, 60, 120 amps, switch selectable
Output: 0 - 5 VDC
Response time: 2 seconds
Size: 2.9" L x 2.58" W x 1.04" H
Wire opening: 1.1" L x 0.9" W
Approvals: UL listed E150462
Model Number: CT-30/60/120 (includes 15' of cable)
Cable Length
Cable runs of 100' and more are common. Use 22 or 24 AWG solid wire for easy insertion into the C123C I/O ports.
The jaws swing open, and a wire can be inserted.
Connect the sensors to the C123C I/O ports connection block. Note polarity on current transformers. CCAT interface can also be used.