Does the ballast immediately begin to send current to the pulse start lamp after the power is restored and how much?
A. There is no current flow through the lamp until the lamp starts. When the lamp starts initially, there is a higher current draw because the voltage in the arc tube is low at first; the current draw increases until the lamp reaches its operating voltage range. This information about (line input) open circuit can be found in the Ballast Specification Sheets. If there is a momentary power outage, the lamps may be too hot to restart. This can possibly cause a line circuit breaker to trip if there is not enough allowance for open circuit current, especially if there has been a retrofit to the same wattage controlled current pulse start reactor gear from the old pinch style CWA. Neither CWA ballasts nor controlled current reactor ballasts should be a problem, if the installation was planned right.. But controlled current reactor ballasts draw approximately 125% more open circuit current than a CWA ballast does. So, if you are retrofitting an installation with reactor gear, be very careful
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