Yuchai 4J Series 50kVA-63kVA Diesel Generator, Emergency Standby Power for Small Commercial Buildings

Product Overview

WOPUSAI Yuchai 4J series 50kVA‑63kVA open‑frame diesel generator set adopts original Yuchai 4J series diesel engine, matched with TFW brush‑less all‑copper alternator. Running at 1500rpm 50Hz, it outputs stable 400V/230V three‑phase power. Compared with brushed generator units, this brush‑less TFW design eliminates carbon‑brush wear issues, cuts routine maintenance workload. Equipped with direct‑injection fuel system, mechanical governor and 24V DC electric start. Well‑suited for projects requiring long‑term continuous operation, such as commercial standby power, data‑room backup, engineering sites and remote area power supply.

‑ Product Series: Yuchai 4J Series 50kVA‑63kVA Diesel Generator Set

‑ Power Range: 50kVA‑63kVA, 50Hz, 1500rpm

‑ Engine: Yuchai 4J series diesel engine

‑ Alternator: TFW Brush‑less All‑Copper Synchronous Alternator

‑ Rated Voltage: 400V/230V three‑phase

‑ Starting Mode: DC 24V electric start

‑ Application: Commercial backup power, long‑time continuous running, construction site, remote area power supply

Product Showcase

Yuchai 4J Series 50‑63kVA Open‑Type Diesel Generator Complete open‑structure genset assembled with Yuchai 4J water‑cooled diesel engine and TFW brush‑less all‑copper alternator.

Yuchai 4J four‑cylinder engine adopts direct‑injection fuel supply, mechanical speed governing, 24V DC electric startup and 40℃ standard water‑cooled circulation cooling system. Air intake supports natural aspiration / turbo‑charging options. The TFW brush‑less all‑copper alternator features H‑class insulation, IP23 protection grade, star‑type connection and AVR automatic voltage regulation, power factor 0.8 lag. Without carbon‑brush components, it avoids carbon‑powder accumulation, improves operational stability for unattended long‑run scenarios. Open layout facilitates daily visual inspection of engine and alternator.

Key Specifications

Core Advantages

1. Proven Yuchai 4J Four‑Cylinder Diesel Engine Original Yuchai 4J power unit with mature industrial‑grade design. Direct‑injection combustion optimizes fuel consumption performance. Supports natural aspiration or turbo‑charging versions, delivers steady power output under fluctuating load, adapts to heavy‑duty continuous working conditions.
2. TFW Brush‑less All‑Copper Alternator (Core Differentiation from Brushed Type) Adopts TFW brush‑less full‑copper winding alternator. No carbon‑brush wearing parts, no frequent carbon‑brush replacement and carbon‑powder cleaning work. H‑class high‑temperature‑resistant insulation material, IP23 higher‑level enclosure protection, better dust and moisture resistance compared with brushed STC alternators. AVR keeps output voltage stable during load changes, ideal for unattended standby power scenarios.
3. 24V DC Electric Start & Reliable Water‑Cooling System 24V DC electric starting enables quick startup. Standard water‑cooled circulation system controls engine working temperature effectively during long‑hour continuous running. Mechanical governor structure is robust, low failure risk, easy for field technicians to troubleshoot.
4. Lower Long‑Term Maintenance Workload Brush‑less structure removes carbon‑brush‑related routine servicing. For sites where frequent maintenance is inconvenient, this unit greatly reduces after‑sales labour cost. Open‑frame design allows easy access for filter replacement and visual equipment check. Global‑available spare parts support after‑market repair.
5. High‑Quality Three‑Phase Power For Demanding Applications Three‑phase 400V/230V output, power factor 0.8 lag. Higher insulation and protection grade makes it fit for commercial buildings, small data backup, engineering projects and remote working sites, not limited to simple workshop temporary power supply.

🎯 Application Scenarios

‑ Commercial building & shopping mall emergency backup power ‑ Unattended standby power for small data‑rooms ‑ Construction site long‑duration temporary power supply ‑ Off‑grid power for remote industrial and mining sites ‑ Generator rental fleet focusing on low‑maintenance requirement projects

⚙️ Optional & Customization

‑ Silent canopy / rain‑proof canopy optional

‑ ATS automatic transfer switch for auto‑start & auto‑switch function

‑ Base integrated fuel tank, remote monitoring module optional

‑ Supply scope: Complete open‑type generator set

Custom Workflow: Requirement Confirmation → Quotation → Production → Pre‑shipment Load Running Test → Delivery

📦 Packaging Standards

‑ Packaging: Bare unit with anti‑rust treatment; export wooden case optional ‑ Comply with ISPM‑15 shipping requirement for sea & land transportation ‑ Attached documents: Operation manual, factory test report, packing list

🚛 Shipping & Delivery

‑ Full cargo insurance, whole‑process logistics tracking ‑ Heavy‑duty anti‑collision fixation for ocean transportation ‑ Complete customs‑declaration documents for cross‑border trade ‑ Standard production lead‑time: 10‑20 working days

🏢 Brand Introduction

WOPUSAI, located in Foshan, Guangdong, specializes in generator assembly and full‑range generator aftermarket spare‑parts. We assemble multiple series gensets powered by Yuchai, Shangchai and other well‑known engines, covering both brushed and brush‑‑less alternator configurations. All finished units pass strict no‑load and load testing before shipment. We provide one‑stop power solutions and professional technical support for global dealers and end‑users.