A Glossary of Electrical Terms
A
- A
- AA
- AAAC
- AAC
- AAC/TW
- AASHTO
- Absorbed Glass Mat
- ACAR
- ACB
- Access Point
- Accuracy Class
- ACSR
- ACSR/AW
- ACSR/TW
- ACSS
- ACSS/AW
- ACSS/TW
- Active Material (Battery)
- Active Power
- Adjustment
- Admittance
- ADSL
- AEIC
- Aeolian Vibration
- Aerial Cable
- AFCI
- AFD
- AFI
- AIC
- Air Blast Breakers
- AIS
- Alley Arm
- All-or-Nothing Relay
- Alternating Current
- Ambient Temperature
- American Wire Gage (AWG)
- Amorphous Semiconductor
- Ampacity
- Ampere
- Ampere-Hour
- Ampere-hour capacity (storage battery)
- Ampere-hour meter
- Anneal
- Anode
- ANSI
- Antenna Gain
- Anti-Pumping Device
- Apparent Power (volt-amps)
- AR
- Arc
- Arcing Time
- Arc Flash
- Arc Thermal Performance Value
- Arrester
- Askeral
- ASTM
- ATC
- ATP
- Automatic line sectionalizer
- Automatic Recloser
- Autonomous Photovoltaic System
- Autotransformer
- Auxiliary Power
- Auxiliary Relay
- AWG
- Azimuth
- A-H
- A/D Conversion
B
- Balanced Load
- Balanced polyphase system
- Ballast
- Bandwidth
- Basic impulse level (BIL)
- Basic Insulation Level
- Battery Cell
- Battery Tray
- Bay-O-Net
- Beacon
- Beam Spread
- Biased Relay
- Bias Current
- Blowing
- Bluetooth
- Bonding
- Booster Transformer
- Boost Charge
- Breakdown Voltage
- Brownout
- Buck
- Bulb Envelope
- Bull Line
- Bull Wheel
- Bunched Stranding
- BURD
- Burden
- Buried Urban Residential Distribution
- Bushing
C
- Cable Pulling Lubricant
- Cable Sheath
- Cable Tray
- CAIDI
- CAIFI
- Calibration
- Calorie
- Candela (cd)
- Candlepower
- Candlepower Distribution Curve
- Capacitance
- Capacitor
- Capacitor bank
- Capacitor Voltage Transformer
- Capacity (Battery)
- Category 5 Cable
- Cathode
- CB
- CDMA
- Cell-Reversal (Battery)
- Characteristic Angle
- Characteristic Curve
- Characteristic Impedance Ratio (C.I.R.)
- Charge Controller
- Charge Rate (Battery)
- Charge (Battery)
- Charge-Retention (Battery)
- Check Protection System
- Chlorinated Polyethylene
- CH2H2
- CH4
- Circuit
- Circuit Breaker
- Circuit Insulation Voltage
- Circuit Switchers
- Circuit Voltage
- Circular-Mil (cmil)
- Closing Impulse Time
- Closing Time
- CO
- Coaxial Cable
- Coefficient of Utilization (CU)
- Coil Loss
- Collector Roadway (Lighting)
- Combination Unilay
- Compact Stranding
- Competition Transition Charge (CTC)
- Compliance Voltage
- Compression Splice
- Concentric Stranding
- Conductivity
- Conductor
- Conductor Shield
- Conduit
- Conduit Fill
- Conjunctive Test
- Constant Current Charge
- Constant Potential Charge
- Continuous Load
- Continuous Rating
- Conversion Coefficient
- Copolymer
- Core Balance Current Transformer
- Core Loss
- Corona Discharge
- Coulomb
- Counter EMF
- Counting Relay
- CPE
- Creepage Distance
- Crest Value
- Cross-Linked Polyethylene (XLPE)
- CSP
- CST
- Cu
- Current
- Current Limiting Fuse
- Current Transducer
- Current Transformer
- Current Transformer Ratio
- Cutoff Angle (Lighting)
- Cutoff (Lighting)
- Cut Off Voltage
- CU (Lighting)
- Cycle
- C-Rate
- C2H4
- C2H6
D
- DA Bolt
- decibel
- Deep Discharge (Battery)
- Delta-Wye
- Dependent Time Measuring Relay
- Depth of Discharge
- Derating
- DES
- Design Load
- Device Control Point
- De-energized
- De-ionization Time
- DFT
- Dielectric
- Dielectric Constant
- Dielectric Grease
- Dielectric Strength
- Dielectric Test
- Dielectric Withstand
- Dielectric Withstand Voltage Test
- Digital Signal Processing
- Digital Signal Processor
- Dipole Antenna
- Dip Tolerance (Lighting)
- Directional Relay
- Direct Current
- Direct-on-Line
- Discharge Current
- Discharge Rate (Battery)
- Discharge (Battery)
- Disconnect Switch
- Distortion Factor
- Distribution Automation
- Distribution Transformer
- Distribution Voltage
- Disturbed Network Protocol
- DMZ
- Double Arming Bolt
- Draw-Lead
- Drop-Out
- Dry Charge (Battery)
- Dry-Type Transformers
- DTIM
- Dual Voltage Switch
- Dual Voltage Transformer
- Duct Bank
E
- Earthing Transformer
- Earth Fault Protection System
- Eddy Current
- EEI
- EERA
- Effectively Grounded
- Effective Internal Resistance (Battery)
- Electrically Safe Work Condition
- Electrical Hazard
- Electrical Relay
- Electrolyte (Battery)
- Electromechanical Relay
- Electromotive Force
- Embedded Generation
- EMTP
- End Point Voltage
- End-of-Discharge Voltage
- End-Point Voltage
- Energy Management System
- Entrainment (Battery)
- EPDM
- EPR
- EPROM
- Eutectic
- Exciting Current
- Extra High Voltage
F
- F
- FA
- Farad
- Fault Close Rating
- Fault Current
- Fault Indicator
- Federal Energy Regulatory Commission (FERC)
- Feeder
- Ferro resonance
- Fiducial Value
- Field Current
- Flame Resistance
- Flashover
- Flash Hazard
- Flash Hazard Analysis
- Flash Protection Boundary
- Flash Suit
- Float Charge
- Flooded Cell
- Fluorescent Lamp
- Foot-candle (fc)
- FPI
- Frequency
- Frequency Transducer
- Fulgurate
- Full Scale Output
- Fuse
- Fused Cutout
- Fuse Arcing Time
- Fuse Link
- Fuse Melt Time
G
H
I
- I
- ICEA
- ICT
- IEC
- IED
- IEEE
- IESNA
- IGBT
- ILL (Lighting)
- Impedance
- Impulse Test
- Incandescent Lamp
- Incident Energy
- Independent Time Measuring Relay
- Induced Current
- Induced Voltage
- Inductance
- Influence Quantity
- Initial Lamp Lumens (Lighting)
- Inrush Current
- Insolation
- Instantaneous Relay
- Instrument Transformer
- Insulated Gate Bipolar Transistor
- Insulation
- Intermediate Class Arrester
- Internal Impedance (Battery)
- Internal Resistance (Battery)
- International System of Units (SI)
- Interrupter Switch
- Interrupting Medium
- Interrupting Rating
- Interruption
- Intrinsic Error
- Inverse Time Delay Relay
- Inverter
- ISM Band
- Isolation Link
- Isotropic Antenna
- I.D.M.T.
- I2t
L
- L
- Ladder Diagram (LD)
- Lag
- Lamp Lumen Depreciation, LLD (Lighting)
- Lateral Circuit
- Lateral Light Distribution
- Lay Direction
- Lay Length
- LCD
- LDC
- LDD
- Lead
- Lead Acid Battery
- Lead Acid (Battery)
- Lead Dioxide (Battery)
- Lead Sulfate
- LED
- Lighting Arrester
- Lighting Maintenance Factor (MF)
- Lightning & Switching Impulses
- Light Loss Factor (LLF)
- Limited Approach Boundary
- Limiting Value of the output current
- Limit Switch
- Line Hose
- Line Traps
- LLF (Lighting)
- Load
- Load break
- Local Control Mode
- Local Roadway (Lighting)
- Long Distribution (Lighting)
- Long-Term Stability
- LPW
- Lumen
- Lumens Per Watt (LPW)
- Luminaire
- Luminaire Dirt Depreciation Factor (LDD)
- Luminaire Dirt Depreciation (LDD)
- Luminance
- Lux
- LV
M
- MAC address
- Main Protection
- Maximum Permissible Values of the input current and voltage
- MCC
- MCCB
- Mean-Sensing Transducer
- Measuring Element
- Measuring Range
- Measuring Relay
- Medium Distribution (Lighting)
- Medium Voltage
- Megohmmeter
- Melt Time
- Mercury Vapor Lamp (MV)
- Metal Clad (Switchgear)
- Metal Enclosed (Switchgear)
- Metal Halide Lamp (MH)
- Metering (non-tariff)
- Metering (tariff)
- MHR (Lighting)
- Mid Point Sectioning Substation
- Mobile Transformer
- Momentary Rating
- Mortality Curve
- Motion Resistant Conductor
- MOV
- Multi-Crystalline (Photovoltaic)
- Multi-element transducer
- Multi-section transducer
- Multi-shot reclosing
- MVA
- MW
- MWH
N
O
- Off Peak Power
- Off-Load Tap Changer
- OHL
- Ohm
- Ohm’s Law
- Oil Breakers
- Omni directional Antenna
- One-Axis Tracking (Photovoltaic)
- On Load Tap Changer
- Open Link
- Open-Circuit Voltage (Battery)
- Operating Current
- Operating Current (of a relay)
- Operating time Characteristic
- OPGW
- OSHA 29 CFR 1910, Subpart S-Electrical
- OSI 7-layer model
- Outage
- Output common mode interface voltage
- Output Current of a transducer
- Output Load
- Output series mode interface voltage
- Output Span
- Overcharge (battery)
- Overshoot Time
- Over current Relay
- Oxygen Recombination
P
- Pad Mounted Transformer
- Parallel Connection
- Parametric Conjuctive Test
- Parking Bushing
- Parking Stand
- Pasted Plate (Battery)
- PCB
- PCC
- PE
- Peak to Peak
- PED
- Phase Angle
- Phase Angle Transducer
- Phase Rotation
- Photovoltaic
- Photovoltaic Array
- Photovoltaic Cell
- Photovoltaic Concentrator
- Photovoltaic Conversion Efficiency
- Photovoltaic Efficiency
- Photovoltaic Module
- Photovoltaic Panel
- Photovoltaic Stand-Alone System
- Photovoltaic System
- Pick up ratio
- Pilot Channel
- Pilot Line
- Plante Plate (Battery)
- PLC
- Plug Setting Multiple
- Pocket Current Transformer
- Point of Common Communication
- Polarity
- Pole Spacing (Lighting)
- Polyethylene
- Polymer Concrete
- Polyphase
- Polyvinyl Chloride
- Potential
- Potential Transformer
- POW
- Power Electronics Device
- Power Factor
- Power Line Carrier Communication
- Power Transformer
- Prohibited Approach Boundary
- Protection Relay
- Protection Scheme
- Protective Device Numbers, ANSI
R
- Rated Capacity (Battery)
- Rated Lamp Life
- Rated Output
- Ratio Correction
- RCD
- Reactance
- Reactive Power
- Real Power
- Recloser
- Recombination (Battery)
- Regulating Transformer
- Regulator
- Relay
- Remote Control Point
- Resealable Cap (Battery)
- Residual Current
- Residual Voltage
- Resistance
- Restricted Approach Boundary
- Reversible Output Current
- Ridge Pin
- Ripple
- Ripple Content of the Output
- RJ-11
- RJ-45
- RMU
- ROCOF
- Root-Mean-Square
- RTU
S
- SAIDA
- SAIFI
- SCADA
- Scaling Resistor
- SCP
- SCS
- Sealed Cell (Battery)
- Self Discharge (Battery)
- Semi-cutoff (Lighting)
- Separator (Battery)
- SER
- Series Connection
- Service Entrance Cable
- Service Life (Battery)
- SEU
- SFC
- Shock Hazard
- Short Circuit
- Short Distribution (Lighting)
- Shotgun Stick
- Sidewall Pressure
- Simplex Communications System
- Single Element Transducer
- Single-Phase
- Single-Shot Reclosing
- Sintered Plate (Battery)
- SOTF
- Spacing-to-Mounting Height Ratio
- Specific Conjuctive Test
- Specific-Gravity (Battery)
- Split Phase
- Spread Spectrum
- Spring Winding Time
- Stability Limits of a Protection System
- Stability of a Protection System
- Stability of Transducer
- Stage 3 Emergency
- Standard calibration
- Starting Current
- Starting Relay
- Starved Cell (Battery)
- STATCOM
- Static Relay
- Static Var Compensator
- Static Wire
- STC
- Stranded Conductor
- Stringing Block
- Substation Configuration Language
- Sub-Transmission System
- Sulfation (Battery)
- Sulfur-Hexafluoride (SF6)
- Super Draw Lead
- Surge Withstand
- Surge Withstand Capability (swc) Test
- Sweeling (Battery)
- Switchgear
- Switching Surges
- Switch, Network
- System Disturbance Time
- System Impedance Ratio
- S.I.R.
T
- Tap Changer
- TC57
- Tensile Strength
- Thermoplastic
- Thermoset
- Thin Film (Photovoltaic)
- Three-Phase
- Through Fault Current
- Thumper
- Time Delay Relay
- Tow Axis Tracking (Photovoltaic)
- TPI
- Tracking Array (Photovoltaic)
- Transducer
- Transducer Error
- Transducer Factor
- Transducer with Live Zero
- Transducer with Suppressed Zero
- Transformer
- Transformer Insulation
- Transformer Ratio
- Transformer Voltage Regulators
- Trickle Charge (Battery)
- True RMS Amps
- True RMS volts
- TRXLP
- Tubular Plate (Battery)
- Tungsten Halogen Lamp
- TW
- Twisted Pair
U
V
- V
- VA
- VAC
- Vacuum Circuit Breakers
- Vacuum Interrupter
- Valve Regulated Sealed Cell (Battery)
- Vapor Phase
- VCB
- VDC
- Vector Group Compensation
- Veiling Luminance
- Venting (Battery)
- Vent Cap (Battery)
- Vent Valve (Battery)
- Volt
- Voltage Class
- Voltage Drop
- Voltage Rating
- Voltage Regulation
- Voltage Sag
- Voltage Spread
- Voltage Swells
- Voltage Transducer
- Voltage Transformer
- Voltage Transformer Ratio
- Voltage Transients
- Voltage Withstand Test
- VR Cable
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