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This standard is developed in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB/T 9330.1-2008 Plastic insulated control cables - Part 1: General requirements, GB/T 9330.2-2008 Plastic insulated control cables - Part 2: Polyvinyl chloride insulated and sheathed control cables and GB/T 9330.3-2008 Plastic insulated control cables - Part 3: Cross-linked polyethylene insulated control cables.
This standard is developed based on GB/T 9330.1-2008, incorporating part of the contents of GB/T 9330.2-2008 and GB/T 9330.3-2008; the following main technical changes have been made with respect to GB/T 9330.1-2008:
——The copper/plastic composite tape (foil) screen has been added (see 4.1.3);
——The "conductor of fixed laying cable" has been modified to "conductor of hard structure cable" and "conductor of mobile laying cable" to "conductor of soft structure cable" (see 7.1.2; 6.1.2 of Edition 2008);
——The shrinkage test and water absorption test of XLPE insulation have been added (see Table 5);
——The requirements for the thickness of the thinnest part of metal layer of metal (composite) tape, the lapping rate of metal (composite) tape screen and the assessment requirement of diameter of single wire of metal wire braided screen have been added (see 7.4);
——The test indexes of thickness of extruded or lapped inner covering and average thickness measurement of lapped inner covering have been added (see 7.5.3);
——The assessment requirements for the thickness of armouring steel tapes and the diameter of armouring steel wire and the test method for the size of armour layer have been added (see 7.6.2);
——The requirements for sheath spark test have been added (see 7.7.2);
——The requirements for mechanical and physical properties of insulation have been added (see Table 5);
——The ST3 sheath has been deleted (see Table 7 of Edition 2008);
——The requirements for mechanical and physical properties of sheath have been added (see Tables 12 and 13);
——The provisions for measuring the number of cores through test have been added (see clause 8);
——The requirements for halogen-free property of cable nonmetallic materials have been added (see Table 15);
——The requirements for inspection have been added (see Table 19);
——The calculation method of the upper limit of cable outer diameter has been added (see A.2.7).
This standard was proposed by China Electrical Equipment Industrial Association.
This standard is under the jurisdiction of SAC/TC 213 National Technical Committee on Wires and Cables of Standardization Administration of China.
The previous editions of the standard are as follows:
——GB/T 9330.1-1988 and GB/T 9330.1-2008;
——GB/T 9330.2-1988 and GB/T 9330.2-2008;
——GB/T 9330.3-2008.
Plastic insulated control cables
1 Scope
This standard specifies the product code and representation method, cable name and model specification, finished cable marking and insulated core identification, technical requirements, test methods and inspection rules, service characteristics and packaging of extruded PVC and cross linked polyethylene (XLPE) insulated, PVC, polyethylene and halogen-free polyolefin sheathed control cables with AC rated voltage U0/U of 450V/750V.
This standard is applicable to the control cables which are fixedly laid and used in control or monitoring circuits and protection lines with AC rated voltage U0/U of 450V/750V or below.
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.
GB/T 2900.10 Electrotechnical vocabulary - Electric cables
GB/T 2951.11-2008 Common test methods for insulating and sheathing materials of electric and optical cables - Part 11: Methods for general application - Measurement of thickness and overall dimensions - Tests for determining the mechanical properties
GB/T 2951.12-2008 Common test methods for insulating and sheathing materials of electric and optical cables - Part 12: Methods for general application - Thermal ageing methods
GB/T 2951.13-2008 Common test methods for insulating and sheathing materials of electric and optical cables - Part 13: Methods for general application - Measurement for determining the density - Water absorption tests - Shrinkage test
GB/T 2951.14-2008 Common test methods for insulating and sheathing materials of electric and optical cables - Part 14: Methods for general application - Test at low temperature
GB/T 2951.21-2008 Common test methods for insulating and sheathing materials of electric and optical cables - Part 21: Methods specific to elastomeric compounds - Ozone resistance, hot set and mineral oil immersion tests
GB/T 2951.31-2008 Common test methods for insulating and sheathing materials of electric and optical cables - Part 31: Methods specific to PVC compounds - Pressure test at high temperature - Test for resistance to cracking
GB/T 2951.32-2008 Common test methods for insulating and sheathing materials of electric and optical cables - Part 32: Methods specific to PVC compounds - Loss of mass test - Thermal stability test
GB/T 2951.41-2008 Common test methods for insulating and sheathing materials of electric and optical cables - Part 41: Methods specific to polyethylene and polypropylene compounds - Resistance to environmental stress cracking - Measurement of the melt flow index - Carbon black and/or mineral filler content measurement in polyethylene by direct combustion - Measurement of carbon black content by thermogravimetric analysis (TGA) - Assessment of carbon black dispersion in polyethylene using a microscope
GB/T 3048.4-2007 Test methods for electrical properties of electric cables and wires - Part 4: Test of DC resistance of conductors
GB/T 3048.5-2007 Test methods for electrical properties of electric cables and wires - Part 5: Test of insulation resistance
GB/T 3048.8-2007 Test methods for electrical properties of electric cables and wires - Part 8: AC voltage test
GB/T 3048.9-2007 Test methods for electrical properties of electric cables and wires - Part 9: Spark test of insulated cores
GB/T 3048.10-2007 Test methods for electrical properties of electric cables and wires - Part 10: Spark test of extruded protective sheaths
GB/T 3956-2008 Conductors of insulated cables
GB/T 4909.2-2009 Test methods for bare wires - Part 2: Measurement of dimensions
GB/T 6995.1-2008 Markings for electric wires and cables - Part 1: General requirements
GB/T 19666 Flame retardant and fire resistant wires and cables
JB/T 8137 (all parts) Delivery drums for wires and cables
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 2900.10 and the following apply.
3.1
routine tests
R
test carried out, by the manufacturer, on all manufactured lengths of the finished cables in order to inspect whether all cables meet the specified requirements
3.2
sample tests
S
tests made by the manufacturer on samples of completed cable or elements taken from a completed cable so as to verify that the finished product meets the specified requirements
3.3
type tests
T
test carried out on a type of cable specified in this standard before supply according to general commercial principle in order to verify that the cable properties meet the intended service conditions
Note: This test is characterized by the fact that once the type test is conducted, it is unnecessary to repeat it unless the cable characteristic is potentially changed due to the change in material, design or manufacturing process of cable
3.4
rated voltage
reference voltage for cable structure design and electrical performance test
Note: It is expressed by U0/U in V; U0 is the voltage r.m.s. between any insulated conductor and the "ground" (cable metallic protective layer or surrounding medium); U is the voltage r.m.s. between any two-phase conductors of multicore cable system.
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4 Product codes and representation methods
4.1 Product codes
See Table 1 for product codes.
Table 1 Product codes
Item name Code
Series Control cable K
Material characteristic Copper conductor Omitted
PVC insulation V
XLPE insulation YJ
PVC sheath V
Polyethylene or halogen-free polyolefin sheath Y
Structure characteristic Braided screen P
Copper tape screen P2
Aluminum/plastic composite tape (foil) screen P3
Copper/plastic composite tape (foil) screen P4
Flexible structure R
Double-layer steel tape armouring 2
Steel wire armouring 3
PVC oversheath 2
Polyethylene or halogen-free polyolefin oversheath 3
Note: Aluminum/plastic composite tape (foil) may be referred to as aluminum/plastic composite tape for short; copper/plastic composite tape (foil) may be referred to as copper/plastic composite tape for short; copper tape, aluminum/plastic composite tape (foil) and copper/plastic composite tape (foil) may be collectively referred to as metal (composite) tape.
4.2 Product representation methods
4.2.1 The products shall be expressed by model, specification and standard number.
4.2.2 If the products has requirements for combustibility, the representation method of the product shall meet the requirements of GB/T 19666.
4.2.3 Cables of the same type and specification having different conductor structures shall be expressed separately, with Class 1 conductor expressed by (A) (omitted), and Class 2 conductor expressed by (B), which shall be indicated after the specification.
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4.2.4 The green-yellow insulated cores in the cable shall be indicated separately from other cores.
Example 1: Copper conductor PVC insulated and sheathed control cable, 24 cores, 1.5mm2 (structure of Class 1 conductor), with a rated voltage of 450V/750V and green-yellow insulated core, is expressed as:
KVV-450/750 23×1.5+1×1.5 GB/T 9330-2020
Example 2: Copper conductor PVC insulated and sheathed control cable, 24 cores, 1.5mm2 (structure of Class 2 conductor), with a rated voltage of 450V/750V and green-yellow insulated core, is expressed as:
KVV-450/750 23×1.5(B)+1×1.5(B) GB/T 9330-2020
Example 3: Copper conductor XLPE insulated PVC sheathed copper-tape screened control cable, 24 cores, 1.5mm2 (structure of Class 1 conductor), with a rated voltage of 450V/750V, without green-yellow insulated core, shall be expressed as:
KYJVP2-450/750 24×1.5 GB/T 9330-2020
Example 4: Copper conductor PVC insulated and sheathed Category B flame-retardant flexible control cable, 24 cores, 1.5mm2, with a rated voltage of 450/750V, without green-yellow insulated core shall be expressed as:
ZB-KVVR-450/750 24×1.5 GB/T 9330-2020
Example 5: Copper conductor XLPE insulated polyolefin sheathed steel wire armored halogen-free low-smoke flame-retardant Category A fire-resisting control cable, 24 cores, 1.5mm2 (structure of Class 1 conductor), with a rated voltage of 450V/750V, without green-yellow insulated core, shall be expressed as:
WDZAN-KYJY33-450/750 24×1.5 GB/T 9330-2020
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Product codes and representation methods
5 Name, type and specification of cables
6 Markings for finished cables and identifications of insulated cores of cables
7 Technical requirements and test methods
8 Finished cables
9 Delivery length
10 Inspection rules
11 Service characteristics
12 Packaging
Annex A (Normative) Calculation method of assumed values
