Sincro GKR 4 Steel Alternators Brushes with Digital AVR 4 poles/1-phase
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Sincro GKR 4 Series – 4-Pole Single-Phase Alternators with Digital AVR
Brushes – Digital AVR | Self-Regulated | 1500–1800 RPM | IP23
The Sincro GKR 4 Series offers premium performance in a compact, steel-housed alternator with brush-type excitation and a Digital AVR system for enhanced voltage stability. These 4-pole, single-phase alternators are built for quiet, low-speed operation, delivering reliable, self-regulated 230V output for residential, commercial, and industrial applications.
With industry-standard couplings including IM B34, IM B35, SAE 3/4/5, the GKR 4 series integrates seamlessly into fixed and mobile generator systems.
Key Features:
4-pole operation: 1500 rpm (50 Hz) or 1800 rpm (60 Hz)
Digital AVR for precise voltage regulation (±1%)
Self-regulated, brush-type excitation
Single-phase 230V standard output
Short-circuit current greater than 3 × In
IP23 protection class for ventilated installations
Coupling options: IM B34, IM B35, SAE 3, SAE 4, SAE 5
Reinforced steel frame for long-lasting durability
Technical Overview (Plain Text):
GKR 4 MB
• Power @ 50 Hz: 13.5 kVA – Efficiency: 81%
• Power @ 60 Hz: 16.2 kVA – Efficiency: 83%
• Weight: 72 kg (IM B34/B35), 80 kg (SAE)GKR 4 LA
• Power @ 50 Hz: 16.0 kVA – Efficiency: 83%
• Power @ 60 Hz: 19.2 kVA – Efficiency: 84%
• Weight: 90 kg (IM B34/B35), 98 kg (SAE)GKR 4 LB
• Power @ 50 Hz: 17.5 kVA – Efficiency: 85%
• Power @ 60 Hz: 21.0 kVA – Efficiency: 86%
• Weight: 104 kg (IM B34/B35), 112 kg (SAE)
Applications:
Stationary generators for homes, farms, and workshops
Mobile generator units for field service and commercial use
Backup power systems for sensitive single-phase loads
OEM generator platforms requiring digital AVR precision
Telecom, irrigation, and rural electrification projects
Standard Voltage: 230 V – 50 Hz
Excitation System: Brushes with Digital AVR
Protection Rating: IP23
Couplings: 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 (%) |
|---|---|---|---|---|
| GKR 4 MB | 13.5 | 16.2 | 81 | 83 |
| GKR 4 LA | 16 | 19.2 | 83 | 84 |
| GKR 4 LB | 17.5 | 21 | 85 | 86 |
*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
GKR 4 MB 662x 300x 280 mm
GKR 4 LA 662x 300x 280 mm
GKR 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:
