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DOL
Direct On Line Motor Starter – The simplest form of Motor Starter for induction motor. Direct-on-line starting is the method most commonly used, the most usual consideration being whether the generator and the distribution system can withstand the starting current without excessive voltage dips.

FASD
Fully Automatic Star-Delta Motor Starter – In this type of motor Starters, the motor starts in ‘Star’ when the green button is pressed and a timer automatically performs the change over to ‘Delta’.

SASD
Semi Automatic Star-Delta Motor Starter – In this type of motor starters, the motor starts in ‘Star’ when the green button is pressed and the change over to ‘Delta’ when the button is released. This button must only be released when the motor reaches the normal speed.

HRC
High Rupturing Capacity or High Breaking Capacity denotes the ability of the Fuse Link to interrupt extremely high fault currents.

BIS
Bureau of Indian Standards – Formerly known as Indian Standards Institution (ISI). A government body based in India that is responsible for harmonious development of standardization, marking and quality certification for various products such as Electrical, Electronic items, Food Products, etc.

BVQI
Bureau Veritas Quality International - BVQI, the independent certification body of Bureau Veritas, is widely recognized by international and national authorities through more than 30 accreditations, underlining the legitimacy of its activities. A key strength of BVQI is its unparalleled portfolio of services across the areas of Quality, Health & Safety, Environment, Social Responsibility and Security.

IEC
International Electrotechnical Commission – The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes international standards for all electrical, electronic and related technologies. These serve as a basis for national standardization and as references when drafting international tenders and contracts.

VDE
VDE Standard (Verband Deutscher Elektrotechniker). The dimensions of German Fuse Links (now widely adopted in many parts of the world) are specified to Din 43620 for Low Voltage Fuse Links. Note: Din (Deutsche Industrie Norm) is a dimensional standard only.

SCPD
Short Circuit Protector Device - A device intended to protect a circuit or parts of a circuit against short circuit currents by interrupting them.

gG
Full range breaking capacity for general application.
"g" FUSE LINK
Formerly known as general purpose Fuse Link. A current-limiting fuse link capable of breaking under specified conditions all currents, which cause melting of the fuse element up to its rated breaking capacity.

"a" FUSELINK
Formerly known as Back-Up Fuse link. A current limiting fuse link capable of breaking under specified conditions all currents between the lowest current indicated on its operating time-current characteristic and it’s rated breaking capacity.

DOWNLOAD
The data transfer from the controller to a personal computer.

RATED VOLTAGE
The maximum voltage that the Fuse Link is designed to interrupt. Rated voltage may be in volts ac, dc or both. Fuse Links are voltage sensitive devices, and it is important to note that satisfactory operation of a Fuse Link under fault conditions is dependent upon the applied voltage. They must not therefore be applied in circuits above their voltage capability. They can however be used satisfactorily in circuits at lower voltages.

CURRENT RATING
The value of current that a Fuse Link will carry continuously without deterioration under specified conditions. The continuous current rating of the Fuse Link should not be less than the full load current of the circuit.

AMBIENT TEMPERATURE
The ambient air temperature is that of the air surrounding the fuse (at a distance of about 1m from the fuse or its enclosure, if any). Fuse Links are thermal devices and as such may require some de-rating when used at elevated ambient temperatures. A de-rating in terms of current of 0.5% per degree centigrade above an ambient of 35—C is recommended.

POWER DISSIPATION
The power released in a Fuse Link carrying rated current under specified conditions. The quoted power dissipation of a Fuse Link must be the maximum value at the extremity of the tags. The power loss values relate to a maximum test ambient temperature of 25—C.

MINIMUM FUSING CURRENT
The minimum value of current required for melting the fusible elements.

FUSE
A device that by the fusing of one or more of its specially designed and proportioned components opens the circuit in which it is inserted by breaking the current when this exceeds a given value for a sufficient time. The fuse comprises all the parts that form the complete device. It is common practice to refer to a "fuse link" as a "fuse".

FUSE HOLDER
The combination of the fuse base with its fuse carrier.

FUSE BASE (FUSE MOUNT)
The fixed part of a fuse provided with contacts, terminals and covers, where applicable.

FUSE CARRIER
The movable part of a fuse designed to carry a fuse link.

FUSE LINK (CARTRIDGE FUSE LINK)
The part of a fuse including the fuse element(s), intended to be replaced after the fuse has operated. It is common practice to refer to a "fuse link" as a "fuse".

FUSE CONTACT
Two or more conductive parts designed to ensure circuit continuity between a fuse link and the corresponding fuse holder.

FUSE ELEMENT
A part of a fuse link designed to melt when the fuse operates. The fuse link may comprise several fuse elements in parallel.

STRIKER
A mechanical device forming part of a fuse link which, when the fuse operates, releases the energy required to cause operation of other apparatus, or indicators, or to provide interlocking.

CIRCUIT BREAKER
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 circuit conditions such as those of short circuit.

DISCONNECTOR
A mechanical switching device, which, in the open position, complies with the requirements specified for the isolating function.

ENCLOSURE
A part providing a specified degree of protection against certain external influences and a specified degree of protection against approach to or contact with live and moving parts.

FUSE BOARD
An enclosure containing bus bars, with fuses, for the purpose of protecting, controlling or connecting more than one outgoing circuit fed from one or more incoming circuits. (Also known as a Distribution Fuse board).

FUSE COMBINATION UNIT
A combination of a mechanical switching device and fuses in a composite unit.

ISOLATION
Function intended to cut-off the supply from all or a discrete section of the installation by separating the installation or section from every source of electrical energy for reasons of safety.

INTEGRALLY FUSED CIRCUIT BREAKER
A combination, in a single device, of a circuit breaker and fuses, one fuse being placed in series with each pole of the circuit breaker.

SWITCH (MECHANICAL)
A switching device capable of making, carrying and breaking currents under normal circuit conditions which may include specified operating overload conditions and also carrying for a specified time currents under specified abnormal circuit conditions such as those of short circuit.

SWITCH DISCONNECTOR
A switch, which in the open position, satisfies the isolating requirements specified for a disconnector.

SWITCH DISCONNECTOR FUSE
A switch disconnector in which the poles have a fuse in series in a composite unit

STARTER
The combination of all the switching means necessary to start and stop a motor, in combination with suitable overload protection.

SHORT CIRCUIT MAKING CAPACITY
A making capacity for which prescribed conditions include a short circuit at the terminals of the switching device.

CUT-OFF CURRENT CHARACTERISTIC
A curve giving the cut-off current as a function of the prospective current under stated conditions of operation.

TIME-CURRENT CHARACTERISTICS
A curve giving the pre-arcing time or operating time as a function of the prospective current under stated conditions of operation.