IEC 61821 pdf download

IEC 61821 pdf download.Electrical installations for lighting and beaconing of aerodromes – Maintenance of aeronautical ground lighting constant current series circuits
1 Scope
This International Standard applies to the maintenance of AGL constant current series circuits. This International Standard • covers constant current series circuits for AGL installed at aerodromes and heliports; • concentrates on providing the safety requirements for the maintenance of an AGL constant current series circuit. It is recognised that AGL constant current series circuits of different design characteristics and parameters are in existence; • is mainly concerned with safety to persons by specifying the rules and fundamental principles for the maintenance of AGL constant current series circuits; • is not intended to apply to AGL primary series circuits supplied directly from a mains constant voltage source; • is not intended to be used for public street lighting, roadway lighting or any other installation requiring the use of constant current series circuits.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60903:1988, Specification for gloves and mitts of insulating material for live working IEC/TS 62143, – Electrical installations for the lighting and beaconing of aerodromes – Aeronautical ground lighting systems – Guidelines for the development of a safety life-cycle methodology 1) IEC/ISO Guide 51:1999, Safety aspects – Guidelines for their inclusion in standards
3 Definitions
For the purpose of this International Standard the following definitions apply.3.1 aerodrome authority organisation accountable for the safety and security of persons, aircraft operations and facilities at an aerodrome 3.2 AGL constant current series circuit apparatus configured as an electrical circuit designed to produce and operate with a constant current, independent of specified load variations, in order to provide a specified light for aeronautical purposes 3.3 AGL operator person responsible for the control of the AGL to permit the safe movement of aircraft 3.4 caution sign non-metallic safety sign attached to equipment conveying a warning against interference with such equipment 3.5 constant current regulator (CCR) apparatus which produces a current output at a constant r.m.s. value independent of varia- tions in the constant current series circuit load, input voltage and service conditions as specified 3.6 contractor organisation or person(s) given a written order to provide a service or undertake specified work 3.7 dead free from any electrical connection to a source of potential difference and from electric charge; not having a potential different from that of the earth 3.8 earthed connected to the general mass of earth in such a manner as to ensure at all times an immediate discharge of electrical energy without harm 3.9 electrical equipment anything used, intended to be used or installed for use, to generate, provide, transmit, trans- form, rectify, convert, conduct, distributes, control, store, measure or use electrical energy 3.10 harm physical injury or damage to the health of people either directly, or indirectly, as a result of damage to property or to the environment. [ISO/IEC Guide 51, 3.3, modified]3.11 hazard potential source of harm. NOTE The term includes hazards to persons arising within a short time scale (for example, fire and explosion) and also those that have a long-term effect on a person’s health (for example, release of a toxic substance). [ISO/IEC Guide 51, 3.5, modified] 3.12 hazardous event occurrence, with possible hazardous consequences, arising as the result of a hazardous condition 3.13 hazard sign non-metallic safety sign that conveys a warning against risk of harm 3.14 isolate disconnect and separate electrical equipment from the normal source(s) of electrical energy in such a way that the disconnection and separation is secure 3.15 live electrically connected to a source of electricity or which has acquired a charge by other means 3.16 maintenance act of diagnosing and physically repairing, or preventing, equipment failures 3.17 personal protective equipment equipment used to protect persons from harm in the working environment NOTE Personal protective equipment includes such items as special tools, protective clothing, insulating screening, safety harnesses and safety signs.