WAPDA Specification P-10 & DISCO Standards — transformer approval guide.
Ensure 100% compliance and zero inspection rejections. TransfoLine manufactures, tests, and supplies distribution transformers engineered strictly to WAPDA Specification P-10 (DDS-84), meeting exact approval guidelines for LESCO, K-Electric, FESCO, MEPCO, IESCO, and GEPCO grid interconnections.
Engineered for absolute industrial reliability.
TransfoLine brings 18+ years of field engineering and 500+ completed substations across Pakistan.
Comprehensive technical execution scope.
WAPDA P-10 Loss Compliance
Strict adherence to maximum no-load iron losses and full-load copper losses ($I^2R$) across all standard ratings from 25 kVA to 630 kVA.
Dielectric & Impulse Clearance
Engineered to withstand 75kV Basic Impulse Insulation Level (BIL) and 28kV power frequency AC high-voltage withstand for 60 seconds.
Regional Utility Customization
Corrosion-resistant C5-M marine paint for K-Electric coastal zones; 50°C high-ambient thermal radiators for MEPCO/FESCO industrial heat.
Full Inspection Documentation
Complete submittal packs including factory routine test sheets, vector group diagrams (Dyn11), and impedance voltage (%Z) reports.
From concept to energized power.
A systematic 4-step engineering roadmap delivering transparent timelines and guaranteed performance.
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01
Step 1
Load Sanctioning & Demand Notice
Client applies for industrial/commercial load; DISCO issues Demand Notice specifying transformer kVA capacity.
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02
Step 2
WAPDA Spec Transformer Build
TransfoLine manufactures or supplies a compliant unit with certified factory routine test sheets.
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03
Step 3
Utility Pre-Energization Witness Test
DISCO inspection team verifies turns ratio, oil BDV (≥ 50kV), and 5kV Megger insulation on-site.
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04
Step 4
Meter Sealing & Grid Energization
Utility seals CT/PT metering cabinets, connects the 11kV drop-out cutouts, and energizes the substation.
Frequently asked questions.
Common questions about this service. Call our engineering team for anything else.
COMPLIANCE What is the difference between a WAPDA approved transformer and a private industrial transformer?
A WAPDA-approved transformer strictly meets WAPDA Specification P-10 / DDS-84 loss thresholds, BIL levels (75kV), and specific core/coil designs required for grid interconnection. Non-compliant units are rejected during DISCO inspection.
LIAISON Can TransfoLine help get my transformer approved by LESCO or K-Electric?
Yes. Every transformer supplied by TransfoLine comes with complete certified type-test dossiers, loss calculation sheets, and single line diagrams (SLD) guaranteed to meet utility approval guidelines.
RATINGS What are the standard kVA ratings under WAPDA Specification P-10?
Standard 3-phase ratings under WAPDA P-10 include 25 kVA, 50 kVA, 100 kVA, 200 kVA, 400 kVA, and 630 kVA. Higher capacities (1,000 kVA to 10 MVA) are built to custom DISCO industrial sub-station specifications.
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