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

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

Q: What is the full load current of a 630 kVA transformer?

At standard 415V three-phase, a 630 kVA transformer produces 876.4 Amperes of low-voltage (LV) full load current: 630,000 / (1.732 × 415) = 876.4 A. On the 11 kV primary high-voltage side, the rated full load current is 33.1 Amperes.

Q: What main switchgear breaker is needed for a 630 kVA transformer?

An 1000A or 1250A Air Circuit Breaker (ACB) with a microprocessor-based trip unit (providing adjustable LSIG protection: Long-time, Short-time, Instantaneous, Ground-fault) is the engineering industry standard for 630 kVA substations.

Q: Can a 630 kVA transformer be supplied as a Cast Resin Dry-Type?

Yes. While outdoor units are oil-immersed (ONAN), TransfoLine manufactures and supplies 630 kVA Cast Resin Dry-Type (AN/AF) transformers for indoor basements, shopping malls, and hospitals where municipal fire safety regulations prohibit oil-filled equipment.

Q: What size PFI capacitor bank is required for a 630 kVA transformer?

A 200 kVAR to 250 kVAR automatic Power Factor Improvement (PFI) panel with 8 to 12 micro-gap steps and 7% detuned harmonic reactors is required to maintain plant power factor above 0.95 and avoid DISCO low power factor penalties.

The 630 kVA distribution transformer is the official WAPDA DDS-84 and IEC 60076 standard industrial powerhouse in Pakistan. Delivering a massive 876.4 Amperes of low-voltage full-load continuous current at 415V three-phase, this unit is engineered for heavy textile spinning mills, commercial high-rise towers, large chemical plants, and automotive parts manufacturing facilities across all industrial estates in Pakistan.

Rated LV Current 876.4 A

Rated HV Current 33.1 A

Full Load Efficiency 98.7%

Impedance (%Z) 4.5% - 5.0%

Request 630 kVA Quote & Specs → 📞 Call Substation Engineer: 0300 6919113 View Technical Datasheet ↓

630 kVA Unit Blueprint TL-630KVA-DDS84

✓ Pure Copper Windings: 99.99% conductivity, tested to withstand 50°C summer heat.

✓ Low Loss Standards: 1,100 Watts iron loss, 6,500 Watts copper loss at 75°C.

✓ DISCO Approval Guarantee: LESCO, FESCO, GEPCO, IESCO, MEPCO, KE inspection compliant.

Immediate Feeder Dispatch Ready 18-Month Warranty

Commercial Transparency

630 kVA Transformer Price in Pakistan — Key Cost Factors

Commercial pricing for a 630 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 950 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.

630 kVA Commercial Summary

A 630 kVA transformer represents a substantial industrial capital equipment investment. Pricing in Pakistan reflects the market cost of 740 kg of 99.99% pure electrolytic copper, high-permeability CRGO core laminations, 950 liters of Class-I mineral oil, and accredited third-party high-voltage laboratory routine testing. TransfoLine offers brand-new units (18-month warranty) and certified reconditioned units (12-month warranty) with 40% to 50% capital savings.

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Engineering Datasheet

630 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	630 kVA (504 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)	876.4 A	Continuous full load current at 415V secondary
Rated Primary Current (HV)	33.1 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)	4.5% - 5.0%	Guaranteed within ±10% IEC tolerance at 75°C reference
No-Load Losses (Iron Losses)	1,100 Watts	Measured at rated voltage and frequency (CRGO core)
Full-Load Losses (Copper Losses)	6,500 Watts	Measured at rated current at 75°C reference temperature
Transformer Mineral Oil Volume	950 Liters	Uninhibited Class-I mineral oil (BDV > 50 kV fresh)
Total Weight (with Oil & Fittings)	2,850 kg	Active copper winding weight: 740 kg
Overall Physical Dimensions	1,820 mm (L) × 1,250 mm (W) × 1,980 mm (H)	Overall clearance footprint including radiators and conservator
Recommended HT Drop-Out Fuse Link	50A Drop-Out Cutout or 11kV Vacuum Circuit Breaker (VCB)	11kV overhead cutout fuse link coordination
Recommended LT Main Circuit Breaker	1000A / 1250A Air Circuit Breaker (ACB) with LSIG Trip Unit	Thermal-magnetic or electronic trip unit coordination
Recommended Low Voltage Cabling	2 Runs of 3.5 Core 300mm² or Single Core 630mm² Cu / XLPE	Sized for <2.5% voltage drop at full load run
Civil Foundation Mounting	Dedicated Outdoor Substation Compound on Reinforced Concrete Plinth	A 630 kVA substation requires a formal civil foundation plinth (minimum 2500 psi concrete) with an oil-containment gravel sump, 2-meter protective security fencing, and a 1250A Air Circuit Breaker (ACB) equipped with overcurrent, short-circuit, and earth-leakage relays.

Industrial Applications

Where is a 630 kVA Transformer Deployed in Pakistan?

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

Continuous power for 8,000 to 12,000 spindle ring frames, auto-cone winders, humidification central fans, and high-pressure industrial compressor rooms in Faisalabad, Multan, and Sheikhupura.

Robust heat dissipation radiators for 50°C summer operation
Dial type oil thermometer with alarm and trip contacts
Full WAPDA DDS-84 loss compliance certification

Powers high-tonnage slurry pumps, rotary drying kilns, industrial chillers, and chemical exhaust blowers in Hattar, Kala Shah Kaku, and Landhi industrial corridors.

Hermetically sealed or conservator tank with silica gel breather
High dielectric oil breakdown voltage (>55 kV)
18-month comprehensive factory warranty

High-capacity power distribution for 15+ story commercial buildings with multi-zone centralized VRF air conditioning, 6 passenger elevators, fire fighting booster pumps, and basement parking ventilation.

Available in Cast Resin Dry-Type for basement fire compliance
Low acoustic vibration and humming noise (<56 dB)
Dual independent body and neutral grounding pits (<0.8 Ohm)

Quality Assurance

Testing Protocols & DISCO Grid Energization Approval

Every TransfoLine 630 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

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Technical Clarifications

630 kVA Transformer Technical & Procurement FAQ

Direct engineering answers to frequently asked questions about purchasing, installing, and maintaining a 630 kVA transformer in Pakistan:

What is the full load current of a 630 kVA transformer?

At standard 415V three-phase, a 630 kVA transformer produces 876.4 Amperes of low-voltage (LV) full load current: 630,000 / (1.732 × 415) = 876.4 A. On the 11 kV primary high-voltage side, the rated full load current is 33.1 Amperes.

What main switchgear breaker is needed for a 630 kVA transformer?