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Tap-changers - Part 1: Performance requirements and test methods
:
Available format(s): Hardcopy, PDF
Language(s): Spanish, Castilian, English
Published date: 27-05-2015
Publisher: Asociacion Espanola de Normalizacion
1 Scope2 Normative references3 Terms and definitions4 Service conditions 4.1 Temperature of tap-changer environment 4.2 Temperature of motor-drive mechanism environment 4.3 Overload conditions5 Requirements for on-load tap-changers 5.1 General requirements 5.1.1 Rating 5.1.2 Liquid filled compartments for diverter and selector switches 5.1.3 Liquid-level gauges 5.1.4 Safety requirements for protection against increase in pressure 5.1.5 Limiting devices for the protection against transient overvoltages 5.1.6 Change-over selector recovery voltages 5.1.7 Coarse fine regulation leakage induction switching 5.2 Type tests 5.2.1 Temperature rise of contacts 5.2.2 Switching tests 5.2.3 Short-circuit current test 5.2.4 Transition impedance test 5.2.5 Mechanical tests 5.2.6 Dielectric test 5.2.7 Type-test certificate 5.3 Routine tests 5.3.1 Mechanical tests 5.3.2 Sequence tests 5.3.3 Auxiliary circuits insulation test 5.3.4 Pressure and vacuum tests 5.4 Special tests 5.4.1 General 5.4.2 Dielectric discharge tests6 Requirements for motor drive mechanisms for on-load tap-changers 6.1 General requirements 6.1.1 Compliance of component parts 6.1.2 Permissible variation of auxiliary supply 6.1.3 Step-by-step control 6.1.4 Tap position indicator 6.1.5 Tap-change in progress indication 6.1.6 Limiting devices 6.1.7 Parallel control devices 6.1.8 Direction of rotation protection 6.1.9 Overcurrent blocking device 6.1.10 Restarting device 6.1.11 Operation counter 6.1.12 Manual operation of the motor-drive mechanism 6.1.13 Motor-drive cubicle 6.1.14 Protective device against running-through 6.1.15 Protection against access to hazardous parts 6.2 Type tests 6.2.1 Mechanical load test 6.2.2 Overrun test 6.2.3 Degree of protection of motor-drive cubicle 6.3 Routine tests 6.3.1 Mechanical tests 6.3.2 Auxiliary circuits insulation test7 Requirements for off-circuit tap-changers 7.1 General requirements 7.1.1 Rated characteristics 7.1.2 Types 7.1.3 Handles and drives 7.1.4 Glands 7.1.5 Interlocks 7.1.6 Mechanical end stops 7.2 Type tests 7.2.1 General 7.2.2 Temperature rise of contacts 7.2.3 Short-circuit current test 7.2.4 Mechanical tests 7.2.5 Dielectric tests 7.2.6 Type test certificate 7.3 Routine tests 7.3.1 Mechanical tests 7.3.2 Pressure and vacuum tests8 Requirements for motor drive mechanisms for off-circuit tap-changers 8.1 General requirements 8.1.1 Compliance of component parts 8.1.2 Permissible variation of auxiliary supply 8.1.3 Tap position indicator 8.1.4 Limiting devices 8.1.5 Operation counter 8.1.6 Manual operation of the motor-drive mechanism 8.1.7 Motor-drive cubicle 8.1.8 Protection against access to hazardous parts 8.2 Type tests 8.2.1 Mechanical load test 8.2.2 Overrun test 8.2.3 Degree of protection of motor-drive cubicle 8.3 Routine tests 8.3.1 Mechanical tests 8.3.2 Auxiliary circuits insulation test9 Nameplate 9.1 Tap-changers (on-load and off-circuit) 9.2 Motor-drive mechanisms10 Off-circuit tap-changer warning label11 Manufacturers operating instructionsAnnex A (normative) Supplementary information on switching duty relating to resistor type tap-changersAnnex B (normative) Supplementary information on switching duty relating to reactor type tap-changersAnnex C (normative) Method for determining the equivalent temperature of the transition resistor using power pulse currentAnnex D (informative) Simulated circuits for service duty and breaking capacity testsAnnex ZA (normative) Normative references to international publications with their corresponding European publications
Applies to on-load tap-changers of both resistor and reactor types, off-circuit tap-changers, and their motor drive mechanisms.
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