1 General provisions
1.0.1 This standard is formulated with a view to meet the requirement of hand-over test of the electric equipment-- electric equipment installation engineering and promotes popularization and application of new technique for the hand-over test of electric equipment.
1.0.2 This standard is applicable to hand-over test of 500kV and less voltage newly installed electric equipment which is eligible according to relevant works test standard of the nation. This standard is not applicable to electric equipments installed under the colliery well or other site with explosive risk.
1.0.3 Hand-over test of mechanical parts of the relay protection, automatism, telemechanism, communication, measurement, rectifying device and electric equipment shall be in accordance with the relevant provisions of standards or codes respectively.
1.0.4 Electric equipment shall make AC withstand voltage test according to this standard, but if this standard not specifies requirement for electric equipment with voltage of 110kV and higher, it may not make AC withstand voltage test.
Making AC withstand voltage test, time shall be increased to duration time after standard voltage of the test, if no special requirement is made, it shall be 1min.
When the withstand test voltage value is calculated as multiple of the nominal voltage, dynamo and electromotor shall be calculated according to nominal voltage in the nameplate, and the cable may be calculated according to method specified in Chapter 18 of this standard.
AC withstand test voltage of off-standard voltage electric equipment may be calculated according to adjacent voltage proportions with interpolation method when no special requirement is made.
When making insulation test, it should make single test by separating the equipments link together in addition to the complete set of equipment assembled by the builder’s. Equipment with same touchstone may be tested together. In order to convenient for field test work, same voltage but different touchstone electric equipments with works test records may be tested together when single test is difficult. Touchstone shall adopt the minimum standard among all the connected equipments.
Insulation test for oil-immersed type transformer and reactor shall be made suffusing with corrected oil. After standing for a certain period of time, it may be carried out after the elimination of air bubbles. Standing time complies with the builder’s requirement, when builder’s hasn't any requirement, electric equipment with 500kV voltage shall be standing for more than 72h; 220~330kV for more than 48h; and 110kv and lower for more than 24h.
1.0.5 When only individual item fells short of the requirement of this standard during the measuring and testing process on electric insulation, it shall make a comprehensive judgement on the test records, and the eligible one may be put into operation.
1.0.6 When rated voltage and rated operational voltage in-service use are different, it shall determine the testing voltage according to the following requirements:
1 It shall be made according to touchstone for rated voltage of the equipment when reinforcing insulation with electric equipment with higher rated voltage;
2 It may make test according to touchstone for rated operational voltage of equipment in-service use when adopting electric equipment with higher voltage that meets the requirements of product commonality and mechanical strength;
Contents
1 General provisions
2 Terms
3 Synchronous generator and rotary condenser
4 Direct current dynamo
5 Intermediate frequency generators
6 Alternating current motor (AC motor)
7 Power transformers
8 Reactor and arc-suppression coil
9 Instrument transformers
10 Oil circuit breakers
11 Air and magnetic blast breaker
12 Vacuum circuit breakers
13 Sulphur hexafluoride circuit breakers
14 Sulfur hexafluoride gas insulated switchgear
15 Isolating switch, load switch, and high voltage fuse
16 Bushing
17 Suspension insulator and pillar insulator
18 Power cable line
19 Capacitors
20 Insulating oil and SF6 gas
21 Arresters
22 Electrostatic precipitators
23 Secondary circuits
24 1KV and less voltage power distribution equipment and feeder line
25 Overhead power line above 1kV
26 Grounding connection
27 Low-voltage electrical apparatus
Appendix A Voltage Standard for the Power Frequency Withstand Voltage Test of the Insulation of High-voltage Electrical Appliance
Appendix B the Reduction Coefficient of Ohmic Value Recalculation for the Winding Insulation of Electric Machine Stator-to Working Temperature
Appendix C Test Method for Partial Discharge of Transformer
Appendix D Reference Value for the DC Leakage Current of Oil-immersed Power Transformer Winding
Appendix E Measuring Method for the Current Transformer Excitation Curve of Protection Level
Appendix F Test Method and Requirements of the Transposition and Interconnection System of Power Supply Cable
Appendix G Specific Test Project
Explanation of Wording in This Standard
