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WAPDA DDS-84 & IEC 60076 · 11kV/415V 50Hz · Dyn11

750 kVA Transformer in Pakistan — Price, Specs & Turnkey Supply

The 750 kVA distribution and power transformer is an industrial heavyweight designed for large-scale production facilities, textile finishing and processing plants, automotive stamping works, and commercial institutional campuses in Pakistan. Breaking through the four-digit current threshold with 1,043.4 Amperes of continuous low-voltage secondary current at 415V three-phase, this transformer handles heavy continuous inductive loads with outstanding thermal stamina and minimal voltage regulation drop.

Rated LV Current 1,043.4 A
Rated HV Current 39.4 A
Full Load Efficiency 98.7%
Impedance (%Z) 5.0%
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750 kVA (also supplied as 800 kVA) Unit Blueprint TL-750KVA-DDS84
750 kVA 11kV 1,043.4 A LV
✓ Pure Copper Windings: 99.99% conductivity, tested to withstand 50°C summer heat.
✓ Low Loss Standards: 1,250 Watts iron loss, 7,400 Watts copper loss at 75°C.
✓ DISCO Approval Guarantee: LESCO, FESCO, GEPCO, IESCO, MEPCO, KE inspection compliant.
Immediate Feeder Dispatch Ready 18-Month Warranty
⚡ Compare Capacity Ratings:
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Commercial Transparency

750 kVA (also supplied as 800 kVA) Transformer Price in Pakistan — Key Cost Factors

Commercial pricing for a 750 kVA (also supplied as 800 kVA) transformer in Pakistan is dictated by raw engineering commodities and technical configurations rather than an arbitrary sticker price. Here is how your commercial proposal is structured:

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Winding Conductor Purity

Prime 99.99% Electrolytic Copper provides maximum conductivity, lower I²R losses, and longer service life (25-30 years). EC Grade Aluminium windings provide a lower initial cost option for budget-sensitive seasonal agricultural projects.

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Dielectric Oil vs. Dry-Type

Standard mineral oil-immersed (ONAN) with 1,100 Liters of Class-I inhibited oil is optimal for outdoor substations. Cast resin dry-type (AN/AF) is required for indoor commercial basements where fire regulations strictly prohibit oil.

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Tap Changer Mechanism

Standard units include a 5-position Off-Circuit Tap Changer (OCTC: ±2.5%, ±5%) for seasonal grid adjustment. On-Load Tap Changers (OLTC) with automatic voltage regulating relays are available for sensitive manufacturing loads.

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New vs. Certified Overhauled

TransfoLine manufactures brand-new units (with 18-month guarantee) and supplies thoroughly overhauled certified reconditioned units (with 12-month replacement warranty) providing 40% to 50% capital expenditure savings.

750 kVA (also supplied as 800 kVA) Commercial Summary

A 750 kVA transformer price in Pakistan reflects over 840 kg of prime electrolytic copper, 1,100 liters of Class-I mineral oil, and heavy-duty structural steel fabrication. Brand-new units come with an 18-month warranty, while certified reconditioned units from our Lahore and Karachi yards provide immediate delivery and 40% to 50% capital cost savings with a 12-month full replacement warranty.

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Engineering Datasheet

750 kVA (also supplied as 800 kVA) Technical Specifications (WAPDA DDS-84 & IEC 60076)

Complete electrical, mechanical, and protection coordination data for electrical consulting engineers and DISCO inspection officers:

Technical Parameter Design Value / Rating Standard & Engineering Notes
Nominal Power Rating 750 kVA (also supplied as 800 kVA) (600 kW (at 0.8 PF)) Continuous maximum rating at 50°C ambient temperature
Primary High Voltage (HV) 11,000 Volts (11 kV) 3-Phase, 3-Wire delta configuration
Secondary Low Voltage (LV) 415 Volts (Line-Line) / 240 Volts (Line-Neutral) 3-Phase, 4-Wire star configuration with neutral bushing
Rated Secondary Current (LV) 1,043.4 A Continuous full load current at 415V secondary
Rated Primary Current (HV) 39.4 A Continuous full load current on 11 kV grid side
System Frequency 50 Hz ±5% WAPDA / NTDC National Grid synchronized
Vector Group Dyn11 Delta HV / Star LV with 30° phase lag neutral
Cooling Designation ONAN (Oil Natural Air Natural) Thermosiphon circulation through radiator panels
Percentage Impedance (%Z) 5.0% Guaranteed within ±10% IEC tolerance at 75°C reference
No-Load Losses (Iron Losses) 1,250 Watts Measured at rated voltage and frequency (CRGO core)
Full-Load Losses (Copper Losses) 7,400 Watts Measured at rated current at 75°C reference temperature
Transformer Mineral Oil Volume 1,100 Liters Uninhibited Class-I mineral oil (BDV > 50 kV fresh)
Total Weight (with Oil & Fittings) 3,250 kg Active copper winding weight: 840 kg
Overall Physical Dimensions 1,940 mm (L) × 1,320 mm (W) × 2,080 mm (H) Overall clearance footprint including radiators and conservator
Recommended HT Drop-Out Fuse Link 65A Drop-Out Cutout or 11kV Vacuum Circuit Breaker (VCB) 11kV overhead cutout fuse link coordination
Recommended LT Main Circuit Breaker 1250A / 1600A Air Circuit Breaker (ACB) with LSIG Microprocessor Thermal-magnetic or electronic trip unit coordination
Recommended Low Voltage Cabling 3 Runs of 3.5 Core 240mm² or 2 Runs of 3.5 Core 400mm² Cu / XLPE Sized for <2.5% voltage drop at full load run
Civil Foundation Mounting Dedicated Outdoor Substation Compound on Heavy Concrete Pad DISCO standards (LESCO, FESCO, GEPCO, IESCO, MEPCO, KE) require a dedicated fenced substation yard or indoor electrical room for 750 kVA installations. Protection must include an 11kV VCB or heavy drop-out cutouts, 9kV surge arrestors, dual copper earth pits (<0.8 Ohm), and an 1250A or 1600A Air Circuit Breaker (ACB).
Industrial Applications

Where is a 750 kVA (also supplied as 800 kVA) Transformer Deployed in Pakistan?

Real-world application engineering scenarios across Pakistani manufacturing complexes, commercial hubs, and industrial zones:

Textile Dyeing, Printing & Finishing Mills

500 to 600 kW Heavy Continuous Wet Processing

Powers continuous fabric stenter frames, rotary screen printing machines, high-pressure jigger dyeing machines, effluent treatment plants (ETP), and industrial steam boilers in Faisalabad and Karachi.

  • Extreme tolerance against corrosive atmospheric chemical vapours
  • Heavy-duty radiators ensuring top oil temperature rise <50°C
  • Multi-stage automatic PFI plant (250-300 kVAR)

Automotive Stamping & Parts Manufacturing

450 to 580 kW Heavy Press & Welding Load

Handles fluctuating shock-pulse loads from 200-ton to 500-ton hydraulic mechanical stamping presses, robotic spot welding cells, and industrial air compressors in Port Qasim and Lahore.

  • High mechanical bracing against electrodynamic short-circuit forces
  • Magnetic oil level gauge and dial thermometer with trip contacts
  • Full routine test certificates for ISO 9001 compliance

University Campuses & Teaching Hospital Complexes

500 to 600 kW Institutional Load

High reliability dual-feeder power for medical diagnostic imaging centers (MRI, CT scans, linear accelerators), centralized surgical suites, and multi-faculty university building blocks.

  • Available as Cast Resin Dry-Type for zero fire risk
  • Low acoustic noise level (<56 dB) for quiet institutional zones
  • Dual earthing grids with lightning dissipation protection
Quality Assurance

Testing Protocols & DISCO Grid Energization Approval

Every TransfoLine 750 kVA (also supplied as 800 kVA) transformer undergoes stringent factory routine testing before dispatch to ensure 100% first-time approval during DISCO departmental inspection:

Mandatory Routine Tests Lab Certified

Insulation Resistance (Megger Test) Tested at 2500V DC (HV-LV, HV-Earth, LV-Earth) ensuring insulation values exceed 2,000 Mega-Ohms.
Winding DC Resistance Measurement Measured across all primary tap positions and secondary phases using Kelvin bridge for balance verification.
Voltage Ratio & Vector Group Verification Confirming exact 11,000V to 415V transformation ratio and Dyn11 30-degree phase shift.
Oil Dielectric Breakdown Voltage (BDV) Verified with 2.5mm sphere gap electrode test exceeding 50 kV (brand new units exceed 60 kV).
Separate Source AC Withstand Test HV winding tested at 28 kV AC for 60 seconds; LV winding tested at 3 kV AC for 60 seconds.

DISCO Inspection & NOC Process Turnkey Assistance

Load Sanctioning File Preparation Preparation of single line diagrams (SLD), connected load lists, and tariff change applications.
Substation Civil Pad Inspection Verification of concrete foundation dimensions, gravel oil-sump, and earth pit clearance distances.
Dual Earth Pit Verification (<0.8 Ohm) Separate chemical/copper plate grounding pits for transformer tank body and neutral star point.
Departmental Testing & Meter Sealing Witnessing of testing by DISCO M&T (Metering & Testing) engineers and installation of bidirectional TOD meters.
Direct Quotation

Request Official Quotation for 750 kVA (also supplied as 800 kVA) Transformer

Specify your factory or commercial plaza parameters. Our high-voltage estimation team will calculate your feeder requirements and deliver an itemized quotation within 2 business hours.

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Technical Clarifications

750 kVA (also supplied as 800 kVA) Transformer Technical & Procurement FAQ

Direct engineering answers to frequently asked questions about purchasing, installing, and maintaining a 750 kVA (also supplied as 800 kVA) transformer in Pakistan:

What is the full load current of a 750 kVA transformer in Pakistan?

At standard 415 Volts three-phase, a 750 kVA transformer delivers 1,043.4 Amperes of low-voltage (LV) full load current: 750,000 / (1.732 × 415) = 1,043.4 A. On the 11,000V (11 kV) primary high-voltage side, the rated full load current is 39.4 Amperes.

What size main circuit breaker is required for a 750 kVA transformer?

A 1250A or 1600A Air Circuit Breaker (ACB) with a microprocessor-based trip unit providing adjustable Long-time, Short-time, Instantaneous, and Ground-fault (LSIG) protection is required for safe continuous operation.

What are the civil foundation requirements for a 750 kVA transformer?

A 750 kVA transformer weighs approximately 3,250 kg (3.25 metric tons). It requires a reinforced concrete foundation plinth (minimum 2500 psi concrete) measuring at least 2,400 mm × 2,000 mm × 350 mm deep, surrounded by an oil-soak gravel pit and 2-meter safety chain-link fencing.

What size PFI capacitor bank is needed for a 750 kVA transformer?

A 250 kVAR to 300 kVAR automatic Power Factor Improvement (PFI) panel divided into 10 to 14 micro-gap stages with 7% detuned harmonic reactors is required to maintain plant power factor above 0.95.

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