1 Scope
This Part of GB 10230 applies to on-load tap-changers of both resistor and reactor types, off-circuit tap-changers, and their motor drive mechanisms. It applies mainly to tap-changers immersed in transformer oil 1) according to IEC 60296 but may also be used for tap-changers with gas insulation or immersed in other insulating liquids insofar as conditions are applicable.
1) The oil referred to in this Part includes other liquid media as appropriate, unless otherwise specified.
It applies to power and distribution transformers of all types and also to reactors.
It does not apply to traction transformers and reactors.
Note: tap-changers of traction transformers and reactors may make reference to this Part and relevant performance indexes shall be determined through negotiation between the manufacturer and the user.
2 Normative References
The following standards contain provisions which, through reference in this text, constitute provisions of this Part of GB 10230. For dated reference, subsequent amendments to (excluding correction to), or revisions of, any of these publications do not apply. However, the parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards. For undated references, the latest edition of the normative document referred to applies.
Foreword i
1 Scope
2 Normative References
3 Terms and Definitions
4 Service Conditions
4.1 Temperature of Tap-changer Environment
4.2 Temperature of Motor-drive Mechanism Environment
4.3 Overload Conditions above Nameplate Rating
5 Technical Requirements for On-load Tap-changers
5.1 General Technical 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 Inductance Switching
5.2 Type Tests
5.2.1 Temperature Rise Tests 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 Tests
5.2.7 Type Test Certificate
5.3 Routine Tests
5.3.1 Mechanical Tests
5.3.2 Sequence Test
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 Tests
6 Technical Requirements for Motor Drive Mechanisms for On-load Tap-changers
6.1 General Technical Requirements
6.1.1 Normalization 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 Indication
6.1.6 Limiting Devices
6.1.7 Parallel Control Devices
6.1.8 Rotation Direction Protection
6.1.9 Overcurrent Blocking Device
6.1.10 Restarting Device
6.1.11 Operation Counter
6.1.12 Manual Operation of a 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 Test
7 Requirements for Off-Circuit Tap-Changers
7.1 General Technical 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 Tests
8 Requirements for Motor Drive Mechanisms for Off-Circuit Tap-Changers
8.1 General Technical 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 Test
9 Nameplate
9.1 Tap-Changers (On-Load and Off-Circuit)
9.2 Motor-Drive Mechanisms
10 Off-Circuit Tap-Changer Warning Label
11 Manufacturers Operating Instructions
Annex A (Informative) Comparisons between the Chapter and Article Numbers of This Part and Those of IEC 60214-1: 2003
Annex B (Informative) Technical Differences between This Part and IEC 60214-1: 2003 and Causes
Annex C (Normative) Supplementary Information on Switching Duty Relating To Resistor Type Tap-Changers
Annex D (Normative) Supplementary Information on Switching Duty Relating to Reactor Type Tap-Changers
Annex E (Informative) Simulated Circuits for Service Duty and Breaking Capacity Tests
Annex F (Normative) Method for Determining the Equivalent Temperature of the Transition Resistor Using Power Pulse Current
Annex G (Informative) Rated Withstand Voltages – IEC 60214-1: 2003
Annex H (Informative) Performance Requirements and Test Methods for Electronic Controller and Electronic Display
Annex I (Informative) Performance Requirements and Test Methods for On-line Oil Purifier
Bibliography
