1 Scope
This standard specifies various technical requirements which shall be complied with upon manufacturing and selection of three-phase oil-immersed on-load capacity regulating power transformers (hereinafter referred to as "capacity regulating power transformer") with rated frequency of 50Hz, voltage grade of 10KV and rated capacity of 160 (50)~630(200)kVA.
This standard is applicable to 10KV power distribution system within the business area of the State Grid Corporation of China.
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 normative document (including any amendments) applies.
GB 1094.1 Power Transformers - Part 1: General
GB 1094.2 Power Transformers - Part 2: Temperature Rise
GB 1094.3 Power Transformers - Part 3: Insulation Levels, Dielectric Tests and External Clearances in Air
GB 1094.5 Power Transformers - Part 5: Ability to Withstand Short Circuit
GB 1094.5 Power Transformers - Part 7: Loading Guide for Oil-immersed Power Transformers
GB 2536 Transformer Oils
GB 4208 Degrees of Protection Provided by Enclosure (IP Code) (IEC 60925-2001, IDT)
GB/T 6451 Specification and Technical Requirements for Three-phase Oil-immersed Power Transformers
GB/T 10230.1 Tap-changers - Part 1: Performance Requirements and Test Methods
GB/T 10230.2 Tap-changers - Part 2: Application Guide
GB/T 13384 General Specifications for Packing of Mechanical and Electrical Product
GB/T 15153.1 Telecontrol Equipment and Systems - Part 2: Operating Conditions - Section 1: Power Supply and Electromagnetic Compatibility (idt IEC 870-2-1:1995, MOD)
GB/T 17468 The Guide for Choice Power Transformers
JB/T 501 Test Guide for Power Transformers
DL/T 572 Operation Specification for Power Transformer
DL/T 597 Specification of Low-voltage Reactive Compensation Controls for Order
DL/T 698.1 Data Acquisition and Management System for Electrical Energy - Part 1: General Consideration
JB/T 3837 Identification Method of Transformers Product Type
JB/T 10088 Sound Level for 6kV~500kV Power Transformers
JB/T 10778 Three-phase Oil-immersed Adjusting Power Transformers
Q/GDW 200 Selection Guide for 10KV Regulating Capacity Power Transformer
IEC 60870-5-101 Transmission Protocols - Companion Standard for Basic Telecontrol Tasks
3 Terms and Definitions
For the purposes of this standard, the terms and definitions specified in GB/T 2900.1, GB 1094.1 and JB/T 10778 and those listed below apply.
3.1
Capacity regulating power transformer
The power transformer equipped with two different rated capacities and with the connection mode of high-voltage winding and low-voltage winding changed according to load change and can reliably operates under different rated capacity conditions.
3.2
On-load capacity regulating power transformer
The power transformer realizing capacity conversion under transformer excitation or load.
3.3
On-load capacity regulating tap-changers
A tap-changer capable of simultaneously changing the winding connection mode on high- and low-voltage sides of capacity regulating power transformer under capacity regulating power transformer excitation or load.
3.4
On-load capacity regulating controller
A control device capable of transferring relevant information and realizing the reliable conversion between high- and low-gear rated capacity operation modes through automatic detection and judgment according to actual loading condition of transformer under transformer excitation or load.
Foreword I
1 Scope
2 Normative References
3 Terms and Definitions
4 Product Model and Implication
5 Technical Requirements
6 Test
7 Type Selection Method
8 Marking, Packaging, Transportation and Storage
9 Installation, Operation and Maintenance
10 Delivery Documents and Information Required to be Provided during Bidding
