[quote=“adnan3986, post:, topic:”]
I have a 1000 VA Homage UPS but it has a very bad reputation of burning my adaptors. I cannot afford to take risk of connecting and burning another adopter to this UPS.
Kindly guide me what should I do so that both of my devices stay ON during load shedding.
Mainly the Power adapters are of two kind:
1) Conventional / Analog power Adapters.
These adapters use iron core transformer and directly convert the incoming AC voltage to a lower level AC voltage. This lowered AC voltage is then converted to DC and then (may or may not be ) regulated. You can easily recognize these kind of adapters because they are big and bulky. Since these contain iron core, so they don’t like anything except pure sine wave input. They are more likely to burn out when driven with non-sine waveforms, even if they don’t burn out they make noise and vibration and heat up much.
1) Switch Mode Adapters.
This type contains ferrite core transformers and first of all, the incoming AC is converted to DC and then stepped down using ferrite core transformers (which operate at high frequency, thus smaller transformers). They are light weight, smart units. Even if you feed them with step sine or a square wave, it makes no difference because AC is converted to DC in the first step. However, this type is sensitive to voltage spikes / surges. Generally they work well with any UPS. These days, 99.9% of mobile chargers are this type of power adapters.
Let us know which type of adapters you have ?