Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
This standard is developed in accordance with the rules given in GB/T 1.1-2009.
This standard was proposed by China Machinery Industry Federation.
This standard is under the jurisdiction of the National Technical Committee on Wires and Cables of Standardization Administration of China (SAC/TC 213).
This standard is issued for the first time.
Power cable with silicone rubber insulation for rated voltages of 0.6/1 kV
1 Scope
This standard specifies the code, model, product representation method and specification, technical requirements, test methods, inspection rules, delivery length, packaging, transportation and storage of power cable with silicone rubber insulation for rated voltages of 0.6/1kV used in high temperature environment or occasion with corrosion of acid and alkali.
This standard is applicable to power cable with silicone rubber insulation for rated voltages of 0.6/1kV (hereinafter referred to as cables) with high temperature resistance or acid and alkali corrosion resistance.
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 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 2951.14-2008 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 3048.4 Test methods for electrical properties of electric cables and wires - Part 4: Test of DC resistance of conductors
GB/T 3048.5 Test methods for electrical properties of electric cables and wires - Part 5: Test of insulation resistance
GB/T 3048.8 Test methods for electrical properties of electric cables and wires - Part 8: AC voltage test
GB/T 3048.9 Test methods for electrical properties of electric cables and wires - Part 9: Spark test of insulated cores
GB/T 3956-2008 Conductors of insulated cables
GB/T 4909.2 Test methods for bare wires - Part 2: Measurement of dimensions
GB/T 6995.3 Markings for electric cables and wires - Part 3: Identifications of cables and wires
GB/T 12706.1-2008 Power cables with extruded insulation and their accessories for rated voltages from 1kV (Um=1.2kV) up to 35kV (Um=40.5kV) - Part 1: Cables for rated voltage of 1kV (Um=1.2kV) and 3kV (Um=3.6kV)
GB/T 19666 Flame retardant and fire resistant wires and cables
JB/T 8137 (All parts) Delivery drums for electric wires and cables
JB/T 10696.7 Test methods for determining mechanical, physical and chemical properties of electric cables and wires - Part 7: Tear test
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
rated voltage
reference voltage for cable design, service and electrical property test
Note: rated voltage is expressed by U0/U.
U0 represents the voltage r.m.s. between any main insulated conductor and the "ground" (metallic shield, metallic sheath or surrounding medium); U represents the voltage r.m.s. between any two-phase conductors of multicore cable or single-core cable system.
For AC system, the rated voltage of the cable is at least equal to the nominal voltage of the system using the cable, and this condition applies to both U0 and U values; for DC system, the nominal voltage is not greater than 1.5 times the rated voltage of the cable.
The working voltage of the system is not greater than 1.1 times the nominal voltage of the system.
3.2
nominal value
value by which a quantity is designated and which is often used in tables
Note: in this standard, the quantity value evolved from nominal value is generally inspected through measurement with consideration of the specified tolerance.
3.3
median value
value in the middle of several values obtained from test which are arranged in increasing or decreasing order in the case that the number of values is odd, or the average of two values in the middle of such values arranged as above in the case that the number of values is even
3.4
fictitious diameter
value calculated according to Annex A, GB/T 12706.1-2008
3.5
routine tests
R
tests carried out by the manufacturer on all manufactured lengths of the finished cables
3.6
sample tests
S
tests carried out by the manufacturer on the samples of finished cables or on some components taken from finished cables at a specified frequency
3.7
type tests
T
tests carried out on a type of cable covered by this standard before supply according to general commercial principle
Note: these tests are 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.
4 Service characteristics
4.1 Rated voltage: U0/U is 0.6/1kV.
4.2 The maximum working temperature of conductor (rated working temperature of cable) is 180℃ during normal operation, while that is 350℃ in case of short circuit (lasts for 5s at most).
4.3 The minimum ambient temperature for cables under service is -45℃.
4.4 Allowable vending radius of cables:
——for cables without armour or shielding structure, it shall not be less than six times the outer diameter of cable;
——for cables with armour or shielding structure, it shall not be less than 12 times the outer diameter of cable.
5 Code, model, product representation method and specification
5.1 Code
5.1.1 Conductor code
Classes 1 and 2 copper conductors: omitted;
Class 5 copper conductor (flexible structure): R.
5.1.2 Insulation code
Silicone rubber insulation: G.
5.1.3 Code of inner sheath
Silicone rubber inner sheath: G.
Note: including the extruded inner covering and separation sheath.
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Service characteristics
5 Code, model, product representation method and specification
5.1 Code
5.2 Model
5.3 Product representation methods
5.4 Combustibility
5.5 Cable specification
6 Conductor
7 Insulation
7.1 Material
7.2 Thickness
7.3 Property
8 Cabling and filler
8.1 Cabling
8.2 Filler and separator
9 Inner sheath
9.1 Structure
9.2 Materials
9.3 Thickness
10 Metallic armour
10.1 Metallic armour type
10.2 Materials
10.3 Dimensions of armoured metallic wire and tape
10.4 Structure
11 Outer sheath
11.1 General
11.2 Materials
11.3 Thickness
11.4 Property
12 Finished cables
12.1 Conductor resistance
12.2 Insulation resistance
12.3 Voltage test
12.4 Mechanical and physical properties of insulation
12.5 Mechanical and physical properties of sheath
12.6 Additional aging test for finished cable segment
12.7 Low-temperature property tests for insulation and sheath
12.8 Combustibility
12.9 Sign of finished cable
13 Test methods and inspection rules
14 Delivery length
15 Packaging, transportation and storage
Annex A (Normative) Nominal sectional area of neutral conductor of multicore cable
Annex B (Normative) Test method for acid and alkali resistance
B.1 General
B.2 Test conditions
B.3 Property requirements
Table 1 Cable models
Table 2 Cable specification
Table 3 Nominal thickness of insulation
Table 4 Mechanical and physical properties of silicon rubber insulation and sheath
Table 5 Spark test voltage
Table 6 Nominal thickness of inner sheath
Table 7 Nominal diameter of armoured round metallic wire
Table 8 Nominal thickness of armoured metallic tape
Table 9 Inspection rules for finished cables
Table A.1 Nominal sectional area of neutral conductor of multicore cable
