Q: What does the PF% mean on your LED Drivers?
A: PF stands for "Power Factor".
Power factor is the relationship (phase) of current and voltage in AC electrical distribution systems. Under ideal conditions, current and voltage are “in phase” and the power factor is “100%” or equals to 1. If inductive loads (LED drivers, motors etc) are present, power factor of less than 100% can occur. Low power factor, electrically speaking, causes heavier current to flow in power distribution lines in order to deliver a given number of kilowatts to an electrical load.
What are the effects?
The power distribution system in a building, or between buildings, can be overloaded by excess (useless) current. Example: With unity power factor (100%), it would take 2,000 KVA (kilo-volt-ampere) of generating and distribution network capacity to deliver 2,000 KW. If the power factor dropped to 85%, however, 2,353 KVA of capacity would be needed. Thus, we see that lower power factor has an averse effect on generating and distribution capacity.
Low power factor overloads generating, distribution, and networks with excess KVA.
Hi-Line Lighting's IP67 Premium Series LED Drivers come with exceptionally high PF ratings of 0.9 and above. For those more budget-conscious, we also stock "Economy Class" Drivers, which offer a lower power factor but the efficiency and quality of the driver is still very high.