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O
OA
OA
Occ
Occasional Traffic
OFD
OFDM
Off
Off Peak Power
Off-Load Tap Changer
Offset Bend
OHL
OHL
Ohm
Ohm
Ohm's Law
Oil
Oil Breakers
OLT
OLTC
Omn
Omni directional Antenna
On
On Load Tap Changer
One
One-Axis Tracking (Photovoltaic)
Ope
Open Link
Open-Circuit Voltage (Battery)
Opening Time
Operating Current
Operating Current (of a relay)
Operating time Characteristic
Operating Value
OPG
OPGW
Osc
Oscillograph
OSH
OSHA
OSHA 29 CFR 1910, Subpart S-Elec
OSI
OSI 7-layer model
Out
Outage
Outage, Forced
Outage, Scheduled
Output
Output common mode interface vol
Output Current of a transducer
Output Load
Output series mode interface vol
Output Span
Ove
Over current Relay
Over range
Overcharge (Battery)
Overload
Overshoot Time
Oxy
Oxygen Recombination
Ozo
Ozone
42 definitions under O
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