FR Annex 1: Abbreviations and Definitions
"AC" means Alternating Current
"Applicant" means a producer of electricity through a SSDG installation
"CEB" means the Central Electricity Board
"Circuit breaker" means a switching device capable of making, carrying, and breaking currents under normal circuit conditions and also making, carrying for a specified time, and breaking currents under specified abnormal conditions such as those of short circuit
"DC" means Direct Current
"Dedicated transformer" means a transformer installed between the CEB's network and SSDG network that serves only the SSDG and attached loads, if any
"DG" means Distributed Generation
"Distributed generation" means electric generation facilities connected to the Utility network at the PCC
"Directional-power relay" means a relay that operates on a predetermined value of power flow in a given direction, or upon reverse power so that, when used with SSDG in a non-export configuration, it will prevent power flow into the CEB's Network
"Flicker" means a variation of input voltage sufficient in duration to allow visual observation of a change in electric light source intensity
"Fault" means a physical condition that causes a device, a component, or an element to fail to perform in a required manner, for example a short-circuit, a broken wire, an intermittent connection
"Frequency" means the number of complete cycles of sinusoidal variations per unit time
"Greenfield" means an installation of SSDG at a location without existing connection point
"Grid" means CEB's network that brings electricity from power stations to consumers
"THD" means Total Harmonic Distortion
"Harmonic distortion" means continuous distortion of the normal sine wave; typically caused by nonlinear loads or by inverters, measured in Total Harmonic Distortion (THD)
"IGBT" means Insulated-gate bipolar transistor
"Installer" means a person who has been certified by the supplier or has followed a course on Certified SSDG installation
"IPP" means an Independent Power Producer
"Islanding" means a condition in which a portion of the CEB's network is energised by one or more SSDGs through their PCC(s) while electrically separated from the rest of the system
"Isolated Generation" means a condition where the electrical path at the PCC is open and the SSDG continues to energise local loads
"kV" means kilovolt
"kVA" means Kilovolt Ampere
"kW" means Kilo Watt (1,000 W = 1,000 J/s)
"kWh" means Kilowatt hour (1,000 watt hours)
"LV" means Low Voltage (Voltage below 1,000 V)
"MW" means megawatt (1,000,000 W = 1,000,000 J/s)
"Parallel operation" means a condition where the SSDG is operating while connected to CEB's network
"PCC" means point of common coupling
"Point of Common Coupling (PCC)" means the point at which a SSDG is connected to the CEB's network
"Power factor" means ratio of real to total apparent power (kW/kVA) expressed as a decimal or percentage
"Producer" means a producer of electricity through a SSDG installation or the owner thereof
"PV" means photovoltaic
"PWM" means Pulse width modulation
"RE" means renewable energy
"SSDG" means Small Scale Distributed Generation up to 50 kW
"SWC" means Surge Withstand Capability, the immunity of this equipment to fast and repetitive electrical transients
"TT system" means in a TT earthing system, the protective earth connection of the consumer is provided by a local connection to earth
"Voltage-restrained over-current relay" means a protective relay in which the pickup and over-current tripping times are affected by the voltage