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WAPDA DDS-84 & IEC 60076 · HEAVY POWER SUBSTATION EPC

6000 kVA Transformer in Pakistan (6 MVA) — Price, Specs & Turnkey Supply

The 6000 kVA (6 MVA / 6.3 MVA) heavy power transformer represents the pinnacle of industrial power distribution and grid interconnection in Pakistan. Delivering an enormous 8,347.2 Amperes of low-voltage secondary current at 415V three-phase (or stepping down 132kV/33kV to 11kV/6.6kV/3.3kV), this transformer powers large primary steel melting arc and induction furnaces (15-ton to 25-ton crucible), chlor-alkali electrolysis complexes, 6 MW solar energy parks, and heavy chemical industrial zones across Pakistan.

Rated LV Current 8,347.2 A (or custom MV distribution)
Rated HV Current 314.9 A @ 11kV (26.2 A @ 132kV)
Full Load Efficiency 99.1%
Impedance (%Z) 7.5% - 8.0%
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6000 kVA (6 MVA / 6.3 MVA Utility & Heavy Power) Unit Blueprint TL-6000KVA-IEC60076
6000 kVA POWER 8,347.2 A (or custom MV distribution)
✓ Prime Electrolytic Copper: 4,950 kg active copper with reinforced electrodynamic clamping.
✓ High Dielectric Oil: 6,400 Liters of Class-I mineral oil tested above 60 kV BDV.
✓ Grid Protection Integration: Buchholz relay, PRD, and RTD temperature sensors included.
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Commercial Transparency

6000 kVA Transformer Price in Pakistan (6 MVA / 6.3 MVA Utility & Heavy Power) — Key Cost Factors

Commercial pricing for a 6000 kVA (6 MVA / 6.3 MVA Utility & Heavy Power) 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 6,400 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.

6000 kVA (6 MVA / 6.3 MVA Utility & Heavy Power) Commercial Summary

A 6000 kVA (6 MVA) power transformer represents a monumental industrial capital asset. Commercial pricing in Pakistan is governed by over 4,950 kg of pure 99.99% electrolytic copper, 6,400 liters of Class-I mineral oil, high-permeability laser-scribed CRGO core steel, motorized On-Load Tap Changer (OLTC) with RTCC panel, and comprehensive third-party high-voltage laboratory testing under WAPDA DDS-84 and IEC 60076. TransfoLine supplies brand-new 6 MVA units (18-month warranty) and certified reconditioned 6 MVA units (12-month warranty) with 40% to 50% capital savings.

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Engineering Datasheet

6000 kVA (6 MVA / 6.3 MVA Utility & Heavy Power) 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 6000 kVA (6 MVA / 6.3 MVA Utility & Heavy Power) (4,800 kW (at 0.8 PF)) Continuous maximum rating at 50°C ambient temperature
Primary High Voltage (HV) 11,000 Volts (11 kV) / 33 kV / 132 kV 3-Phase, 3-Wire delta configuration (or customized)
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) 8,347.2 A (or custom MV distribution) Continuous full load current at 415V secondary
Rated Primary Current (HV) 314.9 A @ 11kV (26.2 A @ 132kV) Continuous full load current on 11 kV grid side
System Frequency 50 Hz ±5% WAPDA / NTDC National Grid synchronized
Vector Group Dyn11 / YNd11 Delta HV / Star LV with 30° phase lag neutral
Cooling Designation ONAN / ONAF / OFWF Thermosiphon circulation through radiator banks (forced cooling available)
Percentage Impedance (%Z) 7.5% - 8.0% Guaranteed within ±10% IEC tolerance at 75°C reference
No-Load Losses (Iron Losses) 6,800 Watts Measured at rated voltage and frequency (CRGO core)
Full-Load Losses (Copper Losses) 48,000 Watts Measured at rated current at 75°C reference temperature
Transformer Mineral Oil Volume 6,400 Liters Uninhibited Class-I mineral oil (BDV > 60 kV fresh)
Total Weight (with Oil & Fittings) 18,000 kg (18 Tons) Active copper winding weight: 4,950 kg
Overall Physical Dimensions 4,350 mm (L) × 2,950 mm (W) × 3,900 mm (H) Overall clearance footprint including radiators and conservator
Recommended HT Protection Switchgear 11kV / 33kV / 132kV Vacuum or SF6 Circuit Breaker with Differential & REF Relays 11kV Vacuum Circuit Breaker with IDMT and Differential Relays
Recommended LT Main Circuit Breaker Multiple 4000A ACBs / Busbar Trunking (BBT) or 11kV Outgoing VCB Switchgear Microprocessor-based electronic LSIG trip unit coordination
Recommended Low Voltage Cabling / Busway Heavy Copper Busbar Trunking System (BBT) Rated 8000A+ or 11kV MV Feeder Cables Copper Busbar Trunking (BBT) system sized for heavy current
Civil Foundation Mounting Dedicated Outdoor Substation Compound on Heavy Reinforced Plinth & Oil Retention Sump A 6000 kVA (6 MVA) substation is classified under DISCO B-4 industrial tariff or independent power producer (IPP) grid code. Installation mandates a formal 11kV, 33kV, or 132kV bay with SF6/vacuum circuit breakers, differential protection (87T), restricted earth fault (REF), neutral grounding resistors (NGR), and dual copper grounding grids (<0.5 Ohm).
Industrial Applications

Where is a 6000 kVA (6 MVA / 6.3 MVA Utility & Heavy Power) Transformer Deployed in Pakistan?

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

Primary Steel Smelting & Arc Furnaces (15-Ton to 25-Ton Crucible)

4,200 to 4,800 kW Extreme Cyclic Smelting Duty

Built with ultra-reinforced winding clamping to withstand violent electromagnetic stresses, severe current harmonics, and rapid thermal cycling from large steel scrap melting furnaces in Lahore, Sheikhupura, and Karachi.

  • Available as OFWF forced oil-water cooling or ODAF forced oil-air
  • Buchholz relay, pressure relief device (PRD), and multi-channel winding temperature RTD sensors
  • Heavy-duty radiators ensuring top oil temperature rise <50°C

6 MW Industrial Solar Park Grid Interconnection

Up to 5,000-6,000 kW Solar Inverter Export Capacity

Primary utility grid-interconnection substation stepping up multi-inverter solar energy to 11kV, 33kV, or 132kV for national grid export under NEPRA licensing standards.

  • Electrostatic shielding against inverter harmonics
  • Low impedance voltage regulation under shifting solar irradiance
  • Complete synchronization testing with DISCO and NTDC

Heavy Chemical Electrolysis & Petrochemical Complexes

4,000 to 4,800 kW Continuous 24/7 Electrochemical Duty

Supplies stable, continuous power for massive DC rectifiers, membrane cell electrolyzers, hydrogen/chlorine compressors, and heavy refrigeration chillers in Port Qasim and Kala Shah Kaku.

  • Multi-coat anti-corrosive chemical epoxy paint finish
  • Motorized On-Load Tap Changer (OLTC) with 17 tap steps
  • Class-I inhibited mineral oil tested above 60 kV BDV
Quality Assurance

Testing Protocols & DISCO Grid Energization Approval

Every TransfoLine 6000 kVA (6 MVA / 6.3 MVA Utility & Heavy Power) 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 transformation ratio and Dyn11/YNd11 phase shift.
Oil Dielectric Breakdown Voltage (BDV) Verified with 2.5mm sphere gap electrode test exceeding 60 kV fresh.
Separate Source AC Withstand Test HV winding tested at 28 kV AC (or 230kV AC for 132kV units) for 60 seconds.

DISCO Inspection & NOC Process Turnkey Assistance

B-3 / B-4 Load Sanctioning File Preparation Preparation of single line diagrams (SLD), protection coordination studies, 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 (<0.5 Ohm) Separate copper grounding grid for transformer tank body, neutral star point, and lightning arrestors.
Departmental Testing & Meter Sealing Witnessing of testing by DISCO M&T (Metering & Testing) engineers and installation of bidirectional TOD meters.
Direct Quotation

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Specify your factory or substation 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

6000 kVA (6 MVA / 6.3 MVA Utility & Heavy Power) Transformer Technical & Procurement FAQ

Direct engineering answers to frequently asked questions about purchasing, installing, and maintaining a 6000 kVA (6 MVA / 6.3 MVA Utility & Heavy Power) transformer in Pakistan:

What is the full load current of a 6000 kVA (6 MVA) transformer?

At standard 415V three-phase line-to-line, a 6000 kVA transformer delivers 8,347.2 Amperes of low-voltage (LV) full load current: 6,000,000 / (1.732 × 415) = 8,347.2 A. On the 11 kV primary high-voltage side, the rated full load current is 314.9 Amperes. On 132kV transmission, primary current is 26.2 Amperes.

What switchgear is required for a 6000 kVA (6 MVA) substation?

On the high-voltage side, an 11kV, 33kV, or 132kV Vacuum/SF6 Circuit Breaker panel equipped with numerical differential (87T), overcurrent (50/51), and earth-fault (50N/51N) protection relays is mandated. On the secondary side, multiple 4000A Air Circuit Breakers (ACB) or outgoing medium-voltage 11kV/6.6kV/3.3kV feeder panels are utilized.

What are the foundation requirements for a 6000 kVA transformer?

A 6000 kVA transformer weighs approximately 18,000 kg (18 metric tons). It requires a heavy reinforced concrete foundation plinth (minimum 3500 psi concrete) measuring at least 4,600 mm × 3,200 mm × 550 mm deep, surrounded by an oil-soak gravel pit capable of containing 100% of the 6,400 liters of oil, enclosed by 2.4-meter security chain-link fencing.

What size PFI capacitor bank is required for a 6000 kVA substation?

A 1,800 kVAR to 2,400 kVAR automatic Power Factor Improvement (PFI) panel divided into 16 to 24 microprocessor-controlled capacitor steps with 7% detuned harmonic reactors is required to maintain plant power factor above 0.95.

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