03-26-2006, 12:37 AM
"...large CRT televisions or montiors on it, or any high powered audio gear"
Not the case. You may be confusing voltage & amperage. CRTs, audio amps, etc. usually depend on High-Voltage circuits where laser printers, refrigerators, etc. require initial and/or substained draws of current (amps).
A CRT might use a flyback circuit producing 70kV but only draw 3 amps on its 115v supply. A refrigerator can surge to 23 amps of current when it first starts its compressor and then drop back to a constant 7 amp draw in normal operation.
A non-industrial, computer type UPS is basically batteries, a battery charger, and an inverter/step-up circuit to provide a LOW amperage 115 volt AC supply for a limited time.
Consider what's in a laser printer. Several motors, a heating element (fuser), and at least one High Voltage supply for the laser and corona wire assemblies (some have individual HV supplies). Draws lots of current to operate.
Not the case. You may be confusing voltage & amperage. CRTs, audio amps, etc. usually depend on High-Voltage circuits where laser printers, refrigerators, etc. require initial and/or substained draws of current (amps).
A CRT might use a flyback circuit producing 70kV but only draw 3 amps on its 115v supply. A refrigerator can surge to 23 amps of current when it first starts its compressor and then drop back to a constant 7 amp draw in normal operation.
A non-industrial, computer type UPS is basically batteries, a battery charger, and an inverter/step-up circuit to provide a LOW amperage 115 volt AC supply for a limited time.
Consider what's in a laser printer. Several motors, a heating element (fuser), and at least one High Voltage supply for the laser and corona wire assemblies (some have individual HV supplies). Draws lots of current to operate.