Power Supplies A to Z

We've included this handy glossary to help with the terminology & abbreviations relating to power products. Pick a letter below to begin, or download the glossary to refer to it whenever you like.

A From 'A' To 'AWG'
B From 'Back Electromotive Force (Back EMF)' To 'Bus Converter '
C From 'C' To 'Curve B (or Class B)'
D From 'dB' To 'Dynamic Load'
E From 'Earth' To 'External Fusing'
F From 'F' To 'Fusible Link'
G From 'Galvanic' To 'Grounded'
H From 'H' To 'Hz'
I From 'I ' To 'Isolation Voltage'
J From 'J ' To 'Junction Field Effect Transistor (JFET)'
K From 'K' To 'kWh'
L From 'L ' To 'LVD'
M From 'Magnetic Amplifier (Mag Amp)' To 'Multi-Resonant Topology (MRT)'
N From 'Nano ' To 'NTC'
O From 'OCV' To 'OVP'
P From 'P' To 'PWM '
Q From 'Quarter Brick ' To 'Quarter Brick '
R From 'R' To 'RS485'
S From 'S' To 'System International d’Unites (SI)'
T From 't' To 'TUV '
U From 'U' To 'USB'
V From 'V' To 'Vss'
W From 'W' To 'Working Voltage'
X-Z From 'X ' To 'Zetta '
# From '°C ' To '°F '

Term of the day : 'Series'

Connecting two or more power supplies (+ve of PSU 1 to -ve of PSU 2 and so on) to increase the output voltage (which will simply be the sum of all output voltages). This is only possible with isolated outputs and particular care needs to be paid to short circuit currents. It is better to only series connect outputs which have the same or similar output currents. The maximum output current will be the lowest of each of the series connected power supplies. For example. Connecting a 24V / 10A power supply in series with a 12V / 20A power supply will provide 36V / 10A (the sum of 24V and 12V for the output voltage and the lowest of 20A and 10A or the output current). Care needs to be taken when connecting outputs in series to ensure that the output isolation to ground is not exceeded.

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