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2. Automobile auxiliary power outlet - Wikipedia

   en.wikipedia.org/wiki/Automobile_auxiliary_power...

   For the 12 volt systems, the center contact is the positive terminal and the shell is the negative terminal. Most automobiles connect the negative terminal to the frame of the vehicle (negative ground). 12 volt auto connectors are made to comply with a standard by Underwriters Laboratories for safety. UL2089 was developed to cover the ...

3. Voltage converter - Wikipedia

   en.wikipedia.org/wiki/Voltage_converter

   The output will usually be DC in the range 1.5–24 V. Power supplies that output either 100–120 V AC or 210–240 V AC are available; they are called inverters, due to the conversion from DC to AC rather than the voltage change. The output frequency and waveform of an inverter may not accurately replicate that supplied by mains electricity ...

4. Power inverter - Wikipedia

   en.wikipedia.org/wiki/Power_inverter

   A solar inverter is a balance of system (BOS) component of a photovoltaic system and can be used for both grid-connected and off-grid (standalone) systems. Solar inverters have special functions adapted for use with photovoltaic arrays, including maximum power point tracking and anti-islanding protection.

5. GM Voltec powertrain - Wikipedia

   en.wikipedia.org/wiki/GM_Voltec_powertrain

   The Voltec drivetrain was initially demonstrated as the E-Flex Propulsion System in the 2007 Chevrolet Volt concept vehicle that debuted at that year's North American International Auto Show. [ 1 ] [ 3 ] [ 4 ] GM touted E-Flex as an attempt to standardize many components of possible future electrically propelled vehicles, and to allow multiple ...

6. Extra-low voltage - Wikipedia

   en.wikipedia.org/wiki/Extra-low_voltage

   The three-phase system is 110 V phase-to-phase and 63 V to neutral / earth. This system voltage is slightly above the ELV limit, but is still very commonly used for cord-powered hand tools and temporary lighting in hazardous areas. As it is transformer-derived, the exposed voltage during an earth fault is depressed below the ELV level.

7. Variable-frequency drive - Wikipedia

   en.wikipedia.org/wiki/Variable-frequency_drive

   Small variable-frequency drive Chassis of above VFD (cover removed). A variable-frequency drive (VFD, or adjustable-frequency drive, adjustable-speed drive, variable-speed drive, AC drive, micro drive, inverter drive, or drive) is a type of AC motor drive (system incorporating a motor) that controls speed and torque by varying the frequency of the input electricity.