The basic requirements of the rectifier
Increased input power The rectifier / charger should have an initial power requirement of 20% of the rated load and gradually increase the input power to 100% of the rated capacity over a 10 second time interval. In redundant UPS systems, the input power of each rectifier / charger should be delayed by 5 to 300 seconds to reduce the impact on the generator
Battery charge voltage temperature compensation When using the remote temperature detector, the rectifier / charger should automatically adjust the battery float voltage (generally press -5mv / only / ℃). Usually the battery float voltage is 2.25V / only, the termination voltage is 1.67V / only,
Battery Charge Current Limit The rectifier / charger should have a battery charge current limiting circuit that limits the battery charge current to 15% of the UPS rated output capacity (KW). When the generator set is powered (when an external low voltage signal is received), the battery charge current should be limited to zero.
AC Input Current Limit The rectifier / charger should have an AC input current limit circuit that typically limits the AC input current to 115% of the full load current. When the generator is energized (where the rectifier receives an external low voltage signal, it is determined that the generator is powered), the AC input current should be limited to 100% of the full load current.
Input current Total harmonic distortion (THD) (total harmonic distortion THD: AC current harmonic current RMS value of the fundamental component of the effective value of the percentage) 6 pulse rectifier input current THD 6 pulse rectifier full load current Should be less than 33%; using input filter can reduce the input current distortion to 10%.
