Pulsar Alternators Pure Copper 20KW 3 Phase |ED-DQT

Feature	Specification
Power Output	~20 kW (≈25 kVA)
Phase	3-Phase
Voltage	~380 V AC
Current	~47.5 A
Frequency	50 Hz
Speed	~1500 rpm
Winding	100 % Pure Copper
Cooling	Air-cooled
Insulation	Class H (typical)

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2,250,000.00 TSh

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A 20 kW 3-Phase Pure Copper Alternator is a heavy-duty alternator head designed to deliver robust three-phase power for industrial, commercial, and backup generator systems. With a rated output of ~20 kW, it is suitable for a wide range of applications where balanced, stable AC power is needed — from powering motors, compressors, pumps, HVAC systems, and workshop machinery to serving as the heart of a standby generator set.

Equipped with 100 % pure copper windings, this alternator offers better electrical efficiency, lower winding resistance, and improved heat tolerance compared with units using aluminium wire. It delivers a three-phase 380 V output at 50 Hz, which is standard in most regions for industrial power distribution and generator set compatibility.

The alternator typically features a rugged air-cooled design, stable voltage regulation, and robust structural elements ready for integration with diesel or gas prime movers. Its construction allows for durable continuous duty, low maintenance, and easy coupling with engines via a foot or flange mount.

Common Applications

Standby or prime power generators for commercial buildings
Industrial equipment power (motors, pumps, compressors)
Construction site power systems
Backup power for workshops, farms, and factories
Coupling to diesel engines or gas engines for generator sets

Electrical Output

Rated Power: ~20 kW (≈25 kVA @ 0.8 power factor) continuous three-phase output.
Phase: Three-phase AC, balanced power delivery.
Rated Voltage: ~380 V AC (standard 3-phase generator output).
Rated Current: ~47.5 A per phase (at 380 V).
Frequency: 50 Hz (matched to typical prime mover speeds).
Speed: ~1500 rpm synchronous (4-pole design).
Power Factor: ~0.8 lagging (design basis for generator sizing).

Winding & Construction

Winding Material: 100 % pure copper windings – higher conductivity, improved efficiency, and better heat handling compared with aluminum windings.
Excitation: Brush or brushless excitation (varies by model) with voltage regulator.
Cooling: Air-cooled design (common in generator alternators).
Insulation Class: Typically Class H or similar high-temperature insulation for durability.
Protection: Often IP23-rated for basic dust and splash resistance (model dependent).

Mechanical & Build Features

Poles: 4-pole construction (1500 rpm at 50 Hz).
Mounting: Base/flange mount for easy engine coupling.
Bearings: Heavy-duty sealed bearings for continuous operation.
Frame: Rugged steel/aluminum frame for structural strength and vibration resistance.

Performance & Regulation

Voltage Regulation: Typically includes Automatic Voltage Regulation (AVR) to maintain stable output under changing loads.
Load Handling: Designed for nominal rated load with occasional short-term overload tolerance (within manufacturer specs).

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