1. What Is GB/T 17467? (General Specification for Package Substations)
GB/T 17467 = High-/Low-Voltage Prefabricated SubstationA national standard specifying the structure, temperature rise, ingress protection, insulation, and grounding requirements for package substations. It is the fundamental basis for package substation design and acceptance testing in China.
2. Temperature Rise Requirements (Key Clauses)
| Component | Permissible Temperature Rise (K) |
|---|---|
| Transformer winding | ≤ 65 |
| Busbar/contacts | ≤ 65 |
| Enclosure | ≤ 30 |
| Operating handle | ≤ 15 |
3. Ingress Protection (Enclosure Protection)
Outdoor package substation enclosure ≥ IP54(dust-proof and splash-proof), ventilation openings IP2X (finger-safe). High-voltage compartment doors must have interlocks that cut power when opened.
4. Grounding Requirements (4 Items)
- Grounding grid: resistance ≤ 4Ω, independent grounding
- Grounding busbar: copper bar ≥ 40×4mm
- Metal enclosure grounding: enclosure reliably connected to grounding grid
- PE busbar: connection between the low-voltage side PE busbar and the grounding grid
5. Insulation Level (withstand voltage)
High-voltage unit power-frequency withstand voltage: 32 kV/1 min for 6 kV systems, 42 kV/1 min for 10 kV systems. Low-voltage unit power-frequency withstand voltage: 2500 V/1 min. Every Golden Unicorn unit undergoes a power-frequency withstand voltage test before shipment, with a report included.
FAQ FAQ
Which standard must a package substation comply with?
GB/T 17467 (package substations) — the primary basis for package substation design and acceptance.
What are the temperature rise limits for a package substation?
Transformer windings ≤ 65K, enclosure ≤ 30K.
What is the ingress protection rating for an outdoor package substation?
≥ IP54, with ventilation openings rated IP2X.
What is the grounding resistance for a package substation?
≤ 4Ω, with an independent grounding grid.
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