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Pressurized Explosion-proof Resistive Load Bank 500KWThe CNWINNEX 500KW Pressurized explosion-proof load bank is a high-power resistive load testing unit designed specifically for explosive hazardous areas. Rated at 400Vac, 50Hz, three-phase four-wire (3P4W) with a power factor of 1.0, it delivers high-precision and repeatable on-load testing for generator sets, UPS systems, power grids and energy storage systems. Built with a containerized structure and side-discharge airflow design, and equipped with a Siemens SIMATIC S7-200 SMART PLC and HMI touch screen, the unit supports both local and remote (Modbus TCP) control modes, combining industrial-grade durability with flexible deployment.
CNWINNEX BT35-11-11.2 Explosion-Proof Stainless Steel Axial Fan: 67,892 m³/h High-Volume Airflow for Centralized Ventilation Power in Large Hazardous SpacesIn large refinery process areas, hazardous-material storage warehouses, and onshore terminals of offshore platforms, the central contradiction in ventilation systems is often not whether explosion-proof certification exists, but whether sufficient air volume can be moved through the hazardous area per unit of time. When spatial scale rises to thousands of square meters, ceiling heights exceed ten meters, or duct routes cross multiple fire compartments, the air-change rate that conventional small and medium fan sizes achieve only through multiple parallel units can be delivered by a single high-volume unit—reducing installation nodes, and with them, the explosion-proof interfaces and maintenance touchpoints at every node.
CNWINNEX BT35-11-6.3 Explosion-Proof Stainless Steel Axial Fan: 18,250 m³/h Medium-High Airflow for Reliable Ventilation Boundaries in Corrosive Hazardous WorkshopsIn the routine ventilation design of chemical workshops, hazardous-material warehouses, and oil and gas stations, equipment selection often faces an implicit contradiction: explosion-proof compliance answers whether a fan can be used at all, but the corrosion degradation of impellers and casings in carbon steel or aluminum alloy units under humid, mildly corrosive, or sulfur-bearing atmospheres steadily erodes the boundary of how long it remains usable. A fan that runs safely in a Zone 1 area for three years may still require premature replacement because pitting on the blades throws off dynamic balance and reduces airflow—a problem that explosion-proof certification alone does not address, but that material and process engineering must answer.
The CNWINNEX BT35-11-6.3 Explosion-Proof Stainless Steel Axial Fan is designed for precisely this contradiction: stainless steel casing and impeller confront corrosive gases and humid environments, ATEX Directive 2014/34/EU and EN 60079 series
CNWINNEX BT35-11-3.15 Explosion-Proof Stainless Steel Axial Fan: ATEX-Compliant High-Efficiency, Low-Noise VentilationIn the explosive hazardous areas of petrochemical plants, oil and gas stations, hazardous-material storage facilities, and offshore platforms, ventilation equipment is not merely a process accessory—it is a foundational line of defense for the working environment. Conventional fans often struggle to reconcile material durability with explosion-proof reliability when faced with high salt spray, corrosive gases, and explosive atmospheres. The CNWINNEX BT35-11-3.15 Explosion-Proof Stainless Steel Axial Fan is engineered precisely for the ventilation demands of Zone 1 and Zone 2 high-risk environments. The product addresses corrosion challenges through stainless steel construction, establishes its explosion-proof baseline on ATEX and EN 60079 series standards, and balances 3,076 m³/h airflow with low-noise operation within a compact frame.
CNWINNEX Explosion-Proof Compressor: Full Coverage of 9 Refrigerants and Precise Pressure Control for Uncompromised Safety BoundariesIn hazardous-area explosion-proof refrigeration systems, refrigerant selection is often dictated by a project's regional environmental regulations, thermal control requirements, and system design. As the "heart" of the system, a compressor's ability to be compatible with multiple refrigerants while maintaining absolute safety control under various pressure conditions is a key indicator of engineering maturity in explosion-proof equipment.
CNWINNEX EX-ART2 2-Cylinder Explosion-Proof Compressor: Compact Architecture and Robust Parameters for Precise Cooling in Confined Hazardous SpacesIn offshore platform analyzer rooms, small explosion-proof control cabins, or space-constrained electrical equipment rooms, explosion-proof HVAC equipment faces strict physical size limits and exceptionally high safety compliance requirements. As China’s only independently IECEx-certified explosion-proof compressor company, CNWINNEX’s affiliated company introduces the EX-ART2 series 2-cylinder explosion-proof compressors—engineered specifically for these "space-premium and high-risk" working conditions.
Centered on static positive-pressure protection (pxb) and integrated with an increased-safety junction box and intrinsically safe protection components, the series carries the marking Ex eb ib mb pxb IIC T4 Gb. Through a compact 2-cylinder structure and two size matrices, it provides a solid, compliant refrigeration heart for cooling capacity requirements ranging from 3.39kW to 11.2kW.- CNWINNEX EX-ART4 Explosion-Proof Compressor: A Modular Matrix and Wide-Voltage Range Customized for Global Hazardous-Area Thermal ControlIn hazardous-area thermal control systems, a compressor must not only deliver sufficient cooling capacity but also guarantee absolute explosion-proof reliability. As China’s only independently IECEx-certified explosion-proof compressor company, CNWINNEX’s affiliated company introduces the EX-ART4 series 4-cylinder explosion-proof compressors. Centered on static positive-pressure protection (pxb) and integrated with increased safety (eb), intrinsic safety (ib), and encapsulation (mb), this series provides a rock-solid safety foundation alongside a highly modular model design and broad electrical parameter matrix—delivering a precisely matched, highly robust core for global explosion-proof HVAC systems.
- CNWINNEX Explosion-Proof Compressor: Static Pressurization + Multi-Layer Intrinsic Safety, an IECEx-Certified “Compliant Heart”The safety of an explosion-proof air conditioner is never determined by the enclosure alone. As the core moving component of the refrigeration cycle, the compressor is both the center of energy conversion and one of the potential ignition sources that most requires systematic control in hazardous areas. CNWINNEX’s affiliated company is China’s only explosion-proof compressor company holding an independent IECEx certificate. The compressor uses static positive-pressure protection as its primary structure, combined with an increased-safety junction box, intrinsically safe sensing and protection components, and a certified solenoid valve—forming a clearly layered, independently traceable explosion-proof system. Marking: Ex eb ib mb pxb IIC T4 Gb; ambient temperature range: -25°C ≤ Tamb ≤ +60°C.
Pressurized Explosion-proof Resistive Load Bank 500KW
Product Overview
The CNWINNEX 500KW Pressurized explosion-proof load bank is a high-power resistive load testing unit designed specifically for explosive hazardous areas. Rated at 400Vac, 50Hz, three-phase four-wire (3P4W) with a power factor of 1.0, it delivers high-precision and repeatable on-load testing for generator sets, UPS systems, power grids and energy storage systems. Built with a containerized structure and side-discharge airflow design, and equipped with a Siemens SIMATIC S7-200 SMART PLC and HMI touch screen, the unit supports both local and remote (Modbus TCP) control modes, combining industrial-grade durability with flexible deployment.
The unit carries dual explosion-proof markings: for gas atmospheres, Ex db eb ib mb pxb ⅡC T4 Gb, suitable for Zone 1 and Zone 2 explosive gas hazardous areas; for dust atmospheres, Ex ib mb pxb tb ⅢC T130℃ Db, suitable for Zone 21 and Zone 22 combustible dust hazardous areas. Designed and manufactured in compliance with ATEX Directive 2014/34/EU and the EN 60079 series of explosion protection standards, a single unit covers both gas and dust risk scenarios, meeting the complex area classification requirements of petrochemical, offshore energy, mining and bulk powder processing projects.
As a professional load bank manufacturer, CNWINNEX provides complete solutions ranging from generator load testing, UPS load testing and grid balancing to data centre server load simulation and battery energy storage system (BESS) testing, with customized configurations available for voltage, power rating and interface requirements.
Core Features
High-precision load testing
With a minimum load resolution of 1kW, the unit combines 12 load stages (1kW, 2kW, 2kW, 5kW, 10kW, 10kW, 20kW, 50kW and 100kW×4) to achieve 500kW continuously adjustable loading, with a load element tolerance of ≤±3%. A three-phase digital meter displays voltage, current, power, frequency and power factor in real time, providing reliable data for generator set and UPS performance verification.
Side airflow design for flexible installation
Horizontal side air intake and horizontal discharge prevent hot air from blowing directly onto equipment and personnel. The containerized structure with four castors allows flexible movement and placement in machine rooms, workshops and outdoor sites, with an airflow of 70 m³/kW/h ensuring stable long-duration operation at 500kW full load.
Industrial-grade resistive elements
The load core adopts nickel-chromium (Ni-Cr) alloy heating resistive elements connected by copper busbars, offering high-temperature resistance, oxidation resistance and long service life. It withstands long-term full-load and frequent switching duty, operating within an ambient temperature range of -20℃ to +50℃.
Intelligent control system (local and remote)
Equipped with a Siemens SIMATIC S7-200 SMART PLC, the unit performs staged loading, parameter setting and status monitoring locally via the HMI touch screen, and remote control and data acquisition via an RJ45 Ethernet interface and PC software using the Modbus TCP protocol. The 12 load commands are executed through intermediate relays, safety interlocks and 3-pole contactors, with PLC digital inputs reading back auxiliary feedback from each stage to form a complete control loop.
Comprehensive safety protection
The unit builds a fail-safe (normally closed) hardwired trip chain integrating six protective layers: fan overload protection, fan low-airflow protection, thermal emergency cut-off, control circuit MCCB, local/remote control mode interlock and E-stop. Fan operation with sufficient airflow is a precondition for load engagement; any protective action automatically unloads and locks out loading, safeguarding both personnel and equipment.
Robust structure and customizable design
The whole unit adopts a containerized structure with IP54 protection for the complete unit and IP55 for the control cabin, a noise level of 85±3 dB(A), and dimensions of 1155×1205×1120mm (W×D×H), offering robust construction and convenient transportation. Customization is available for customer voltage levels, power capacity, communication interfaces and test protocols. Each unit ships with free spare parts including intermediate relays, branch load fuses, air pressure switches, Ni-Cr heating elements and indicator buttons to support long-term maintenance.
Main Technical Specifications
Table 1 Main technical specifications of the CNWINNEX 500KW explosion-proof load bank
Application Scenarios
In the generator sector, the unit performs factory testing, acceptance testing and maintenance on-load testing of diesel and gas generator sets, verifying output stability and protective actions at rated power. For UPS systems, it verifies full-load capability, transfer time and battery discharge characteristics. In the power grid sector, it supports grid balancing and load regulation testing.
In data centres, it simulates the heat load of server racks for room cooling and airflow organization verification; in the energy storage sector, it is suitable for charge/discharge capability and grid-connection performance testing of BESS. The equipment serves oil and gas, chemical, energy storage stations, pharmaceutical plants, port terminals and underground mines where explosive gas or combustible dust hazards exist.
Contact Us
The CNWINNEX 500KW explosion-proof load bank delivers industrial-grade load testing capability for all types of power systems through 500kW pure resistive load, 1kW fine staging, intelligent local/remote dual control and sixfold safety protection. Contact the CNWINNEX engineering team for quotations, technical selection and customized solutions. Website: www.cnwinnex.com; Email: info@cnwinnex.com.
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