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High frequency machine: ( 220V + 10%)
Is a business model, has the
advantages of low cost, light weight, stable performance of the same, but the
voltage is low or high city or hot and humid environment, and to high frequency
radiation interference and small. For example, hospitals and other occasions,
the inferior side.
Low frequency machine: ( 160V-265V )
industrial supplies, weight ratio of high frequency confidential, has stable and
reliable impact resistance, can adapt to bad environment, has the defects of
Line-Interactive, such as the Inter series of STK. The so-called line interactive UPS, refers to the input power is normal, UPS inverter is reverse to charge the battery pack, in the city of electrical anomaly inverter work immediately, the battery voltage is converted to the alternating current output, therefore on-line interactive UPS also has the conversion time. Compared with the backup UPS, online interactive UPS protection function is stronger, the inverter output voltage waveform is better, the general is sine wave, and its biggest advantage is a strong function of the software, such as Inter series UPS random with monitoring software, can easily access to UPS remote control and intelligent management.
Mostly it is caused by weak battery. You may leave the UPS charging overnight and see if it works. If it still does not work, you may try to replace UPS batteries. For any question about battery replacement for different models, please contact your local agent for technical support.