Temporary power supply for projects -- Construction issues with box-type substations
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The project is about to start soon, and temporary electricity supply is required in the initial stage. An agreement has been reached with the power supply authority to allocate an appropriate amount of electricity for the project. But now we need to build a temporary substation on our own. Which colleague is familiar with the relevant procedures in this area? Thank you so much! ! 1. The project requires a transformer manufacturer with the qualifications to handle electrical facilities, and it is planned to order in small batches. 2. What specific specifications, manuals, and standards are required? 3. Are there any specific requirements regarding the distance between the box substation and the fence? We have a 10/0.4 400 kVA unit. Thank you everyone! !
Find a good, larger manufacturer of box-type transformers; I think Chint and Delta would be suitable. Communicate with them – they have professional factories for producing box-type transformers as well as the necessary technology!
The barriers to installing box substations are not high; since you have projects, you can have the project’s construction contractor handle the installation.
The specifications for box-type substations are primarily based on two standards: GB/T17467-1998 \"High/Voltage Prefabricated Substations\" and DL/T537-2002 \"Technical Requirements for Ordering 6–35kV Box-Type Substations\". GB1094.1-1996 Power Transformers – Part 1: General Rules; GB1094.2-1996 Power Transformers – Part 2: Temperature Rise; GB1094.3-2003 Power Transformers – Part 3: Insulation Level and Insulation Testing; GB1094.5-2003 Power Transformers – Part 5: Ability to Withstand Short Circuits; GB/T11022-1999 Common Technical Requirements for Standards of High-Voltage Switching and Control Equipment; GB/T14048-1993 General Rules for Low-Voltage Switching and Control Equipment; GB6450-1986 Dry-Type Transformers; GB7251-2005 Low-Voltage Switchgear and Controlgear Assemblies; GB3906-1991 AC Metal-Enclosed Switchgear for 3–35 kV; GB3804-2004 AC High-Voltage Load Switches for 3–63 kV; GB16926-1997 AC High-Voltage Load Switches – Fused Circuit Breakers; DL/T791-2001 Guidelines for the Selection of Indoor AC Gas-Insulated Switchgear; IEC 62042:1990 High-Voltage AC Load Switches – Fused Circuit Breakers; GB3096-1993 Standards for Environmental Noise in Urban Areas. There is no strictly defined requirement regarding the distance from enclosing walls, but it is necessary to ensure that there are sufficient areas for installation, maintenance, and repair. At least 1.5 to 1.8 meters of space should be left for the high and low voltage rooms as well as the transformer doors.
2# gzwangpeng Thank you! Since it is a small box-type substation, with a contract value of just a few hundred thousand, large manufacturers are unwilling to take on such projects; it’s sufficient to find a reputable local manufacturer.
4# qhwangyz That’s great! I was looking for the first standard; I just can’t remember its name (it’s from another field). Hehe, thanks!