Transformers for Municipal Power Grid Renovation

The Pain Point:

Municipal grid renovation projects also demand minimal disruption to existing underground and overhead infrastructure — distribution transformers must match legacy footprint dimensions exactly while delivering next-generation efficiency. Additionally, low-noise requirements (≤45dB for residential-area substations) are now mandatory in urban planning regulations across major cities.

S13-M Series — Drop-in Replacement Efficiency

• Identical mounting footprint to legacy S9/S11 units (base channel spacing, bushing positions, cable box orientation), enabling same-day replacement with zero civil works modification.
• No-load loss reduced to 65W (100kVA) vs. 200W for S9 and 150W for S11 — representing a 67% efficiency gain over the S9 fleet still operating in many networks.
• Amorphous metal core option (S13-M.RL) achieves further no-load loss reduction to ~35W (100kVA) with Metglas 2605SA1 ribbon.

SCB14 Dry-Type — Urban Indoor Retrofits

• ≤45dB(A) sound pressure level at 1m for units ≤800kVA — compliant with the strictest residential substation noise ordinances.
• SF6-free, non-flammable cast-resin insulation — eliminates the fire-risk and oil-containment infrastructure required by oil-type transformers in underground/basement substations.
• Forced air cooling (AF) mode provides 150% overload capacity for 2 hours — critical during summer peak-demand hours in rapidly urbanizing districts.

YBM Box-Type Compact Substations

• Factory-assembled, pre-tested package: MV switchgear + distribution transformer + LV distribution panel in a single weatherproof enclosure.
• Low-profile design (≤1.8m height option) for deployment in landscaped areas and pedestrian zones without visual intrusion.
• Available in both S13 oil-immersed and SCB dry-type configurations.

30–2500 kVA

Drop-in S9/S11 replacement

50–1600 kVA

70% lower no-load loss than S9

100–3150 kVA

≤45dB(A) low-noise design

100–1600 kVA

Pre-assembled, streetscape-friendly

Operational Track Record

• Supplied 800+ units of S13-M replacement distribution transformers for a major metropolitan grid modernization program over a 3-year period.
• Successfully retrofitted a 60-unit underground substation complex with SCB14 dry-type distribution transformers, eliminating oil-containment requirements and reducing fire-risk insurance premiums.
• Multiple YBM box-type compact substations currently serving high-density residential developments, with 4+ years of uninterrupted service.
• Active framework agreement with a utility's annual procurement program for continuous distribution transformer fleet renewal.

Technical Parameter Quick Reference