WOPUSAI YD490 Series 15kVA-30kVA Open Frame Diesel Generator, Prime Power for Outdoor Temporary Jobs

Product Overview

The WOPUSAI YD490 series 15kVA‑30kVA diesel generator set is equipped with original Yangdong YD490 inline 4-cylinder water-cooled diesel engine, matched with STC brushed self-excited alternator. This economical compact genset provides stable prime power and reliable emergency backup power for small commercial and light industrial applications. Adopting naturally aspirated air intake and direct injection fuel supply system with mechanical speed regulation, the unit features simple structure, easy operation and low maintenance cost. The compact open-frame design occupies little installation space, which is ideal for small workshops, retail shops, construction sites, villas and residential backup power supply.

Product Showcase

Complete open-frame genset assembly, Yangdong YD490 series diesel engine unit, STC brushed self-excited alternator, basic control cabinet, complete piping assembly and compact water cooling radiator.

Key Specifications

Core Advantages

1. Original Yangdong YD490 4-Cylinder Economical Powertrain Yangdong YD490 series 4-cylinder naturally aspirated engine is well known for simple structure and stable performance, specially tuned for generator operation. Direct injection fuel system ensures reliable combustion, and mechanical governor delivers stable running for basic standby power scenarios. The cast iron cylinder block brings good durability for intermittent load operation. Spare parts are widely available in global markets, greatly reducing maintenance expenditure.
2. STC Brushed Self-excited Alternator STC brushed self-excited alternator is mature and cost-effective for low-power gensets. It adopts reliable winding technology and supports AVR automatic voltage regulation to stabilize output voltage during load changes. E-class insulation and IP22 protection grade protect the generator against light dust and splash water, suitable for normal indoor and simple outdoor working environments. The brushed design has simple circuit structure and convenient repair.
3. Stable Mechanical Speed Control System The mechanical governor is robust and easy to adjust, not sensitive to high temperature and humidity environment. It maintains steady rotation speed and frequency under regular load fluctuations. DC12V electric starting system enables fast and convenient startup, no complicated preheating operation required for daily use.
4. Compact Base Frame & Simple Maintenance Design The integrated welded base is compact in size and moderate weight, lowering the requirement for installation foundation and transportation cost. The oil filling ports, filters and inspection covers are arranged for easy access. Each finished genset will go through full-load aging test before delivery to check all mechanical and electrical performance indicators.
5. Cost-effective Customization For Light-duty Backup Power The open-frame design reserves installation space for auxiliary accessories. Optional configurations include silent canopy, ATS automatic transfer cabinet, basic protection control box and extended fuel tank, meeting power demand for small workshops, stores, construction sites and villa emergency backup.

🎯 Application Scenarios

‑ Small processing workshops, light industry factory standby power supply

‑ Retail shops, supermarkets, small office emergency backup power

‑ Construction sites, temporary engineering field power supply

‑ Villas, residential communities and rural off-grid power supply

‑ Small farms, water pump stations and mini municipal projects

⚙️ Optional & Customization

‑ Silent canopy / sound‑insulated enclosure

‑ ATS automatic transfer switch for auto‑start & mains‑failure auto‑switch

‑ Multi‑protection control cabinet, basic monitoring module 

‑ Large‑capacity extended fuel tank, cold‑region preheating device

📦 Packaging Standards

Export‑grade heavy‑duty iron frame packaging, anti‑rust coating for metal surfaces. Complete operation manual, spare‑parts kit are included inside the package.

🚛 Shipping & Delivery

Support full container and LCL transportation. Available for FOB, CIF and other international trade terms. Production lead‑time subject to order quantity, negotiable delivery schedule for bulk orders.

🏢 Brand Introduction

WOPUSAI Mechanical and Electrical

WOPUSAI focuses on R&D, assembly and global supply of industrial diesel generator sets. We maintain long‑term strategic cooperation with Yangdong, Weichai, Cummins, Shangchai Power, Yuchai and other well‑known engine manufacturers. Our product portfolio ranges from small portable gensets to large‑scale heavy‑duty industrial power equipment. Strict quality inspection runs through every production procedure. We provide worldwide customers with full‑set solutions covering model‑selection guidance, technical consultation and after‑sales support.

Introduction of Yangdong Engine

Yangdong engine is a famous domestic small bore diesel power brand. YD490 series inline 4-cylinder naturally aspirated engine features low purchase cost and easy maintenance. Widely used in small diesel generator sets, it is a preferred economical power solution for light-duty emergency backup power projects.