Emerson UPS power supply is mainly frequency machine or high frequency machine
There are small machines are all high frequency machine, large machine frequency machine has, mainly to see customer needs
Ibid. The The Haha. The The South China Emerson agency reported,
Emerson UPS:
Model: UL33 (20-60KVA), UL31 (30 to 80KVA), Hipulse U (80-400KVA)
UHX (1-10KVA), UH31 (10,15,20 KVA), ITA (1-20KVA), NX series all models (NX are the beginning, 10-200KVA), APM (30-150KVA ), APL (300-800KVA)
All modular UPSs are high frequency machines.
(Low R & D cost is low, easy to manufacture), bulky, stable operation (internal bus voltage is relatively low, 450V below the DC), impact resistance load capacity is good, not Balanced load adaptability, the whole efficiency is low (less than 90% at half load), the battery hanging bus (battery charging capacity);
High-frequency machine small size, light weight, high technical content (not easy to do high-power), bus voltage (700V or more DC), the unbalanced load and impact load tolerance is poor, the whole high efficiency (half The battery needs to be connected to the DC bus through a bi-directional DC-DC converter (ie, the battery converter) (the charging power is limited by the battery converter, up to 15% of the total power);
The market is the largest machine sales Hipulse U and UL33, small machine ITA is currently selling very fire, the reason is very simple, buy big machine users focus on stability considerations, buy small machine users is to fight the price, buy cheap The
Overall, Emerson's UPS is good, stable, user-friendly, very good quality, the price is on the side.
