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

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

Q: What is the full load current of a 100 kVA transformer in Pakistan?

At standard 415 Volts three-phase line-to-line voltage, a 100 kVA transformer delivers approximately 139.1 Amperes of low-voltage (LV) full load current: 100,000 / (1.732 × 415) = 139.1 A. On the primary high-voltage (HV) side at 11,000 Volts (11 kV), the rated full load current is 5.25 Amperes.

Q: What size main circuit breaker is required for a 100 kVA transformer?

For a rated current of 139.1A, an electrical engineer typically specifies a 160A or 200A Molded Case Circuit Breaker (MCCB) with adjustable thermal-magnetic or electronic trip units. This provides adequate protection against low-voltage overloads while allowing high motor starting inrush currents.

Q: Can a 100 kVA transformer be mounted on electricity poles?

Yes. A 100 kVA transformer has an approximate total weight of 680 kg, making it fully suitable for standard WAPDA two-pole H-frame mounting using heavy-duty galvanized channel irons. It can also be installed on a ground-level concrete plinth if site space allows.

Q: How much does a 100 kVA transformer cost in Pakistan?

The price depends strictly on whether you require brand-new 99.99% copper windings (with 18-month warranty) or a certified reconditioned unit (with 12-month warranty), as well as current international copper rates and DISCO testing fees. Contact TransfoLine for an itemized commercial quotation based on current yard inventory.

The 100 kVA distribution transformer is Pakistan's most versatile commercial and light-industrial rating. Engineered for an operational full-load secondary current of 139.1 Amperes at 415V three-phase, this unit delivers high-efficiency power distribution for cold storage facilities, commercial retail plazas, poultry farms, fuel filling stations, and light manufacturing workshops across all DISCO utility networks.

Rated LV Current 139.1 A

Rated HV Current 5.25 A

Full Load Efficiency 98.2%

Impedance (%Z) 4.0%

Request 100 kVA Quote & Specs → 📞 Call Substation Engineer: 0300 6919113 View Technical Datasheet ↓

100 kVA Unit Blueprint TL-100KVA-DDS84

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

✓ Low Loss Standards: 260 Watts iron loss, 1,550 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

100 kVA Transformer Price in Pakistan — Key Cost Factors

Commercial pricing for a 100 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 210 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.

100 kVA Commercial Summary

A 100 kVA transformer in Pakistan varies in price based on conductor material (electrolytic copper vs. aluminium), condition grade (factory brand-new with 18-month warranty vs. certified reconditioned with 12-month warranty), tank construction (corrugated fins vs. tubular radiator), and whether turnkey civil plinth installation is included. For auxiliary or agricultural use, certified reconditioned units typically yield 40% to 50% savings over new units while maintaining complete WAPDA testing compliance.

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Engineering Datasheet

100 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	100 kVA (80 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)	139.1 A	Continuous full load current at 415V secondary
Rated Primary Current (HV)	5.25 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)	4.0%	Guaranteed within ±10% IEC tolerance at 75°C reference
No-Load Losses (Iron Losses)	260 Watts	Measured at rated voltage and frequency (CRGO core)
Full-Load Losses (Copper Losses)	1,550 Watts	Measured at rated current at 75°C reference temperature
Transformer Mineral Oil Volume	210 Liters	Uninhibited Class-I mineral oil (BDV > 50 kV fresh)
Total Weight (with Oil & Fittings)	680 kg	Active copper winding weight: 165 kg
Overall Physical Dimensions	1,100 mm (L) × 750 mm (W) × 1,250 mm (H)	Overall clearance footprint including radiators and conservator
Recommended HT Drop-Out Fuse Link	6A / 10A Drop-Out Cutout Fuse Link	11kV overhead cutout fuse link coordination
Recommended LT Main Circuit Breaker	160A / 200A Molded Case Circuit Breaker (MCCB)	Thermal-magnetic or electronic trip unit coordination
Recommended Low Voltage Cabling	3.5 Core 70mm² to 95mm² Cu / PVC / SWA Cable	Sized for <2.5% voltage drop at full load run
Civil Foundation Mounting	Pole-Mounted H-Frame or Ground Concrete Plinth	Under DISCO regulations (LESCO, FESCO, GEPCO, IESCO, MEPCO, PESCO, QESCO, K-Electric), a 100 kVA transformer requires B-2 (industrial) or C-1 (commercial) sanctioned load documentation. Pole-mounted structures require standard double-pole H-frame steel cross-arms with 11kV drop-out fuse cutouts and 9kV lightning arrestors.

Industrial Applications

Where is a 100 kVA Transformer Deployed in Pakistan?

Real-world application engineering scenarios across Pakistani commercial facilities, textile mills, and agro-industrial clusters:

Supplies clean, regulated 415V/240V power to multi-story shopping plazas (10-18 commercial shops) operating heavy inverter air conditioning, commercial refrigeration, elevator lifts, and common area lighting without utility voltage drop.

Individual shop sub-metering coordination
Internal PFI capacitor bank (30 kVAR)
Direct LESCO / K-Electric B-2 commercial billing

Critical power source for modern broiler poultry sheds requiring uncompromised 24/7 ventilation fans, evaporative cooling pads, feed auger motors, and automated climate control systems in rural Punjab and Sindh.

High ambient heat tolerance (50°C rating)
Dual earthing protection against lightning surges
Compatible with automatic transfer switch (ATS) generator backup

Powers 25HP to 40HP semi-hermetic refrigeration compressors, blast chillers, and potato/onion cold storage warehouses across Gujranwala, Sialkot, Multan, and Okara agricultural belts.

High inrush motor starting capability
Off-circuit tap adjustment for low rural voltage feeders
Corrosion-resistant exterior tank coating

Quality Assurance

Testing Protocols & DISCO Grid Energization Approval

Every TransfoLine 100 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 (<1.0 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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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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Specific Requirements (Turnkey Installation, LT Panels, Cabling)

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Technical Clarifications

100 kVA Transformer Technical & Procurement FAQ

Direct engineering answers to frequently asked questions about purchasing, installing, and maintaining a 100 kVA transformer in Pakistan:

What is the full load current of a 100 kVA transformer in Pakistan?

At standard 415 Volts three-phase line-to-line voltage, a 100 kVA transformer delivers approximately 139.1 Amperes of low-voltage (LV) full load current: 100,000 / (1.732 × 415) = 139.1 A. On the primary high-voltage (HV) side at 11,000 Volts (11 kV), the rated full load current is 5.25 Amperes.

What size main circuit breaker is required for a 100 kVA transformer?