elmatador
Electrical
- Jun 10, 2009
- 22
Hi Folks,
I am carrying out a motor starting study. I have a 3100HP 4000V motor being started across the line at a system voltage of 4160V. Motornis a centrifugal with closed valve start. The main transformer is a 12MVA transformer. The voltage dip is 13% for 1.5s. This dip is also seen on the 480V bus. I am trying to figure out if this dip would extinguish the High Pressure Sodium lights. I have researched as much as possible and the only thing I could find is that these types of fixtures can handle +/-10% variation in voltage. I am unable to find any literature that states the voltage dropout value for HPS ballasts. This fixture is NOT the auto regulating type. Its a basic 277V HPS with 0.9pf.
Should I be concerned? All other equipment can handle -15% variation. My main concern is the lighting. Please chime in. Thanks.
I am carrying out a motor starting study. I have a 3100HP 4000V motor being started across the line at a system voltage of 4160V. Motornis a centrifugal with closed valve start. The main transformer is a 12MVA transformer. The voltage dip is 13% for 1.5s. This dip is also seen on the 480V bus. I am trying to figure out if this dip would extinguish the High Pressure Sodium lights. I have researched as much as possible and the only thing I could find is that these types of fixtures can handle +/-10% variation in voltage. I am unable to find any literature that states the voltage dropout value for HPS ballasts. This fixture is NOT the auto regulating type. Its a basic 277V HPS with 0.9pf.
Should I be concerned? All other equipment can handle -15% variation. My main concern is the lighting. Please chime in. Thanks.