Sincro GT4 series Steel Alternators 4-poles/1-phase, Brushes - Compound
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Sincro GT4 Series – 4-Pole Three-Phase Steel Alternators
Brushes – Compound | Self-Regulated | 1500–1800 RPM | IP23
The Sincro GT4 Series is a robust line of 4-pole, three-phase alternators designed to deliver stable, high-efficiency power output in demanding industrial and commercial environments. Featuring brush-type compound excitation, these self-regulated alternators are built for reliable performance, particularly under variable and inductive loads.
Enclosed in heavy-duty steel housings and compatible with IM B34, IM B35, SAE 3, 4, and 5 couplings, the GT4 series is ideal for integration into large generator sets for backup, mobile, or off-grid energy applications.
Key Features:
4-pole design: 1500 rpm @ 50 Hz or 1800 rpm @ 60 Hz
Three-phase output: 230/400 V – 50 Hz standard
Compound excitation (brushes) for consistent voltage and torque
Self-regulated output with excellent dynamic response
Short circuit current > 3 × nominal current
IP23 protection rating – suitable for ventilated environments
Steel casing ensures durability in harsh conditions
Coupling options: IM B34, IM B35, SAE 3/4/5
Suitable for continuous-duty or variable-load operation
Technical Overview (Text Format):
GT 4 MB
22 kVA @ 50Hz, 87% efficiency
26.4 kVA @ 60Hz, 88.2% efficiency
Weight: 92 kg (IM B), 108 kg (SAE)GT 4 LA
27 kVA @ 50Hz, 88% efficiency
32.4 kVA @ 60Hz, 89% efficiency
Weight: 110 kg (IM B), 126 kg (SAE)GT 4 LB
30 kVA @ 50Hz, 89.2% efficiency
36 kVA @ 60Hz, 90.1% efficiency
Weight: 128 kg (IM B), 147 kg (SAE)
Applications:
Industrial and commercial generator systems
Mobile generator units for construction and logistics
Backup and emergency power supply for large equipment
Powering machinery with high start-up demands
Generator OEM builds for export and heavy-duty use
Continuous operation or rental applications requiring durability
Standard Voltage: 230/400 V – 50 Hz
Excitation System: Brushes – Compound
Protection: IP23
Short Circuit Current: > 3 In
Mounting: IM B34, IM B35, SAE 3/4/5
Technical Specifications
| Model | Power 50 Hz (kVA) | Power 60 Hz (kVA) | Efficiency η 50 Hz (%) | Efficiency η 60 Hz (%) |
|---|---|---|---|---|
| GT 4 MB | 22 | 26.4 | 87 | 88 |
| GT 4 LA | 27 | 32.4 | 88 | 89 |
| GT 4 LB | 30 | 36 | 89 | 90 |
*Power- S1 40°C • H class (kVA 230/240V 50/60Hz) – Continuous power output (S1 duty) at 230/240V, 50/60Hz, 40°C ambient, H class insulation; η (%) 50/60Hz – Efficiency at 50/60Hz
Dimensions
GT 4 MB 563x 300x 280 mm
GT 4 LA 662x 300x 280 mm
GT 4 LB 662x 300x 280 mm
*Values may vary — see the GK series catalog for details.
Catalog:
Download main catalog Sincro 2 and 4 pole alternatorsfor portable and mobile gen-sets
Detailed information about the GK series:
