IEC 61442 pdf download

IEC 61442 pdf download Test methods for accessories for power cables with rated voltages from 6 kV (U m = 7,2 kV) up to 30 kV (U m = 36 kV)
1 Scope
This International Standard specifies the test methods to be used for type testing accessoriesfor power cables with rated voltage from 3,6/6 (7,2) kV up to 18/30(36)kv.Test methods arespecified for accessories for extruded and paper insulated cables according to lEC 60502-2and lEC 60055-1 respectively.
2Normative 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 editionof the referenced document (including amendments) applies.
IEC 60055-1: Paper-insulated metal-sheathed cables for rated voltages up to 18/30 kV(withcopper or aluminium conductors and excluding gas-pressure and oil-filled cables) – Part 1:Tests on cables and their accessories
IEC 60060-1:1989，High-voltage test techniques – Part 1: General definitions and testrequirements
IEC 60230:1966,lmpulse tests on cables and their accessories
IEC 60270:2000，High-voltage test techniques – Partial discharge measurements
IEC 60502-2:2005，Power cables with extruded insulation and their accessories for ratedvoltages from 1 kV(Um = 1,2 kV) up to 30 kV(Um = 36 kV) – Part 2: Cables for rated voltagesfrom 6 kv (Um = 7,2 kv) up to 30 kv (Um = 36 kv)
IEC 60811-1-2:1985,Common test methods for insulating and sheathing materials of electricand optical cables – Part 1: Methods for general application – Section Two: Thermal ageingmethods
IEC 60885-3:1988,Electrical test methods for electric cables – Part 3: Test methods forpartial discharge measurements on lengths of extruded power cables
IEC 60986:2000，Short-circuit temperature limits of electric cables with rated voltages from6 kV (Um= 7,2 kV) up to 30 kV (Um = 36 kV)
IEC 61238-1:2003，Compression and mechanical connectors for power cables for ratedvoltages up to 30 kV(Um = 36 kV) – Part 1: Test methods and requirements
3 Test installations and conditions
3.1The test methods described in this standard are intended to be used for type tests.
3.2Test arrangements and the number of test samples are given in the relevant standard.
3.3 The test conditions are specified in Clauses 4 to 20 of this standard.When they are not,they shall be as specified in the relevant standards.
3.4Unless otherwise stated, the testing parameters and the requirements are given in therelevant standard.
3.5 For transition joints (either extruded insulation to extruded insulation or extrudedinsulation to paper insulation), the testing parameters (voltage and conductor temperature)are those for the lower rated cable.
3.6 The tests shall be started not less than 24 h after the installation of the accessories onthe cable test loops,unless otherwise specified by the manufacturer.The time interval shallbe recorded in the test report.
3.7 Cable screens, and armour if any, shall be bonded and earthed at one end only toprevent circulating currents.
3.8 All parts of an accessory which are normally earthed shall be connected to the cablescreen.Any supporting metalwork shall also be earthed.
3.9Ambient temperature shall be (20 ± 15)°c.
3.10Tap water shall be used for all tests in water.
4Ac voltage tests
4.1Dry test for all accessories4.1.1 Installation
The set(s) of accessories shall be erected with all associated metalwork and fittings. Theaccessories shall be clean and dry before applying the test voltage.
4.1.2 Method
Unless otherwise specified， the test shall be made at ambient temperature, and theprocedure for voltage application shall be as specified in Section 5 of lEC 60060-1.
4.2Wet test for outdoor terminations
4.2.1 Installation
The terminations shall be erected in a vertical position，unless they are to be specificallyinstalled in another orientation，with the relative spacing as under’service conditions andaccording to manufacturer’s instructions.