Sincro FK4 series Alternators 4 poles/1-phase, Brushless/Capacitor

Sincro FK4 Series – 4-Pole Single-Phase Alternators

Brushless – Capacitor | 1500–1800 RPM | Self-Regulated | IP23

The Sincro FK4 Series alternators are engineered for low-speed, high-stability power generation. Designed with a brushless, capacitor-based excitation system, these 4-pole single-phase alternators offer excellent voltage consistency, efficient operation, and long service life in continuous-duty applications. Ideal for installations requiring quieter, low-RPM performance.

Key Features

• 4 Poles: Low-speed operation at 1500 rpm (50Hz) or 1800 rpm (60Hz)

• Brushless, Self-Regulated: Maintenance-free with capacitor excitation

• Voltage Stability: High efficiency and consistent output

• Short Circuit Protection: Current > 3 × nominal

• Protection Class: IP23 – for ventilated environments

• Coupling Options: IM B34, IM B35, SAE for flexible installation

Applications

• Stationary generator sets for continuous use

• Power supply for low-noise and low-vibration environments

• Agricultural and workshop machinery

• Backup systems for sensitive equipment

• Rural electrification and off-grid applications

Technical Overview

Model: FK 4 MBS

• Power @ 50Hz: 5.5 kVA — Efficiency: 77%

• Power @ 60Hz: 6.8 kVA — Efficiency: 78%

• Weight: 36 kg

Model: FK 4 MCS

• Power @ 50Hz: 6.5 kVA — Efficiency: 79%

• Power @ 60Hz: 8.1 kVA — Efficiency: 80%

• Weight: 46 kg

Model: FK 4 MDS

• Power @ 50Hz: 8.0 kVA — Efficiency: 81%

• Power @ 60Hz: 10.0 kVA — Efficiency: 82%

• Weight: 56 kg

Standard Voltage: 230 V – 50 Hz
Excitation System: Brushless – Capacitor
Couplings: IM B34, IM B35, SAE
Protection: IP23
Short Circuit Current: > 3 × In