1. Product Description
The ZF-145 Gas-Insulated Metal-Enclosed Switchgear (GIS) represents state-of-the-art technology in high-voltage switchgear, serving as critical equipment in power transmission and transformation systems. This product adopts three-phase common tank design with compact and aesthetically pleasing dimensions (bay width only 0.8m), featuring standardized modular construction to meet diverse customer requirements.
The equipment offers remarkable installation flexibility, suitable for both indoor and outdoor installations with space constraints, including seismically active regions. Its small footprint, flexibility and high reliability make it particularly suitable for space-limited locations like residential areas or urban centers. Maintenance requirements are minimal with extended service intervals, approaching maintenance-free operation, significantly reducing lifecycle costs.
Incorporating intelligent design concepts, the ZF-145 GIS can be configured for conventional electrical control or smart digital control with online fault diagnosis and detection capabilities. The circuit-breaker employs thermal expansion plus assisted blowing self-extinguishing technology, delivering superior breaking capacity, short arcing time, extended mechanical life, and reduced operating energy, fully meeting modern substation requirements for fire prevention and oil-free operation.
This product has successfully entered international markets, particularly in Europe and Latin America. By 2024, it has supplied 175 bays to five countries/regions including Spain, with 11 bays of ZF12B-145(L) GIS successfully installed in Bogotá, Colombia, supporting local electric rail transit systems.
2. Application Scope
The ZF-145 GIS demonstrates extensive international applicability, particularly suited for the following scenarios and voltage levels:
International Standard Compliance: Compliant with IEC 62271-200 “High-voltage switchgear and controlgear” requirements, suitable for 145kV/60Hz power systems in international markets. Simultaneously compatible with domestic 126kV/50Hz standards, possessing dual bidding qualifications.
Special Environment Adaptation: Specifically designed for harsh conditions including extreme cold, high altitude, high humidity/heat, and heavy pollution. Successfully deployed in Latin American regions such as Bogotá, Colombia, and European countries including Spain.
Urban Grid Applications: With compact structure and minimal environmental impact, particularly suitable for substation construction in densely populated urban centers and residential areas. The space-saving design facilitates installation in space-constrained urban locations.
Transportation Power Systems: Successfully implemented in Bogotá’s Regiotram electric rail transit power supply system, providing stable power support for urban rail transportation.
Industrial Applications: Widely used in three-phase AC power systems across critical industries including power generation, metallurgy, coal mining, petrochemicals, and railway transportation.
The equipment has passed complete type tests at China National High Voltage Apparatus Quality Supervision and Inspection Center and CESI Italy, ensuring reliability and compatibility in international markets.
3. Product Description
The ZF-145 Gas-Insulated Metal-Enclosed Switchgear (GIS) represents state-of-the-art technology in high-voltage switchgear, serving as critical equipment in power transmission and transformation systems. This product adopts three-phase common tank design with compact and aesthetically pleasing dimensions (bay width only 0.8m), featuring standardized modular construction to meet diverse customer requirements.
As a flagship product of companies like TGOOD Electric Co., Ltd. and Pinggao Electric, the ZF-145 GIS has undergone complete type tests at 145kV voltage level, demonstrating exceptional reliability. With substantial design margin, it achieves 22 consecutive breaking operations (domestic innovation) and mechanical endurance exceeding 10,000 operations, far surpassing industry standards. The fully enclosed structure houses all high-voltage components within grounded metal enclosures filled with high-performance SF6 gas insulation, ensuring safe operation under various harsh conditions.
The equipment offers remarkable installation flexibility, suitable for both indoor and outdoor installations with space constraints, including seismically active regions. Its small footprint, flexibility and high reliability make it particularly suitable for space-limited locations like residential areas or urban centers. Maintenance requirements are minimal with extended service intervals, approaching maintenance-free operation, significantly reducing lifecycle costs.
Incorporating intelligent design concepts, the ZF-145 GIS can be configured for conventional electrical control or smart digital control with online fault diagnosis and detection capabilities. The circuit-breaker employs thermal expansion plus assisted blowing self-extinguishing technology, delivering superior breaking capacity, short arcing time, extended mechanical life, and reduced operating energy, fully meeting modern substation requirements for fire prevention and oil-free operation.
This product has successfully entered international markets, particularly in Europe and Latin America. By 2024, it has supplied 175 bays to five countries/regions including Spain, with 11 bays of ZF12B-145(L) GIS successfully installed in Bogotá, Colombia, supporting local electric rail transit systems.
4. Product Configuration Composition
The ZF-145 GIS comprises a highly integrated system with multiple functional modules, each meticulously designed and optimized:
Circuit-Breaker Module: The core component utilizing thermal expansion plus assisted blowing self-extinguishing principle, equipped with high-performance spring operating mechanism. This breaker features exceptional breaking capacity, short arcing time, extended electrical endurance, mechanical life exceeding 10,000 operations, and 22 short-circuit breaking operations, fully meeting modern power system reliability and safety requirements.
Disconnector/Earthing Switch Combination: Innovative three-position switch design integrating disconnector and maintenance earthing switch in one module. This space-saving design enhances operational safety and reliability through mechanical and electrical interlocks. Some models include fast earthing switches for maintenance safety.
Measurement and Protection Devices: Include high-accuracy current transformers and voltage transformers for precise electrical parameter measurement; zinc oxide surge arresters provide effective overvoltage protection. These components use imported epoxy resin materials identical to those used by multinational corporations, ensuring stable insulation performance and superior anti-fog flashover capability.
Busbar System: Three-phase common tank design with aluminum alloy enclosure offering lightweight, corrosion resistance, and reduced eddy current losses. A typical double busbar bay weighs approximately 3,500kg, significantly lighter than traditional steel enclosures, reducing foundation requirements and civil engineering costs.
Line/Cable Connections: Multiple connection options including bushings and cable terminations to accommodate various project requirements. All connection parts undergo rigorous electric field calculation analysis and optimization for long-term operational reliability.
Intelligent Monitoring System: Advanced secondary control, measurement and monitoring devices forming complete protection and control systems. Mature intelligent solutions enable online temperature monitoring, partial discharge detection, and circuit-breaker condition monitoring.
Enclosure Structure: Aluminum alloy enclosure offers aesthetic appeal while reducing losses, weight, and civil engineering requirements. The operating mechanism box features fully enclosed micro-positive pressure design (Patent No.: 201120124105.X), fundamentally resolving contamination and corrosion issues, significantly enhancing reliability in harsh environments.
5. Primary Product Functions
The ZF-145 GIS serves as critical equipment in modern power systems with the following primary functions:
Power Control and Protection: Primarily for switching 72.5kV-145kV normal power circuits to achieve power load transfer. During system faults, it can rapidly isolate faulty equipment or line sections, ensuring power system safety and normal operation while preventing fault propagation.
Safety Earthing Function: Provides reliable earthing protection to safely earth de-energized equipment or lines, effectively ensuring safety for power lines, equipment, and maintenance personnel. The three-position integrated disconnector/earthing switch design with mechanical and electrical interlocks ensures operational safety.
System Monitoring and Diagnostics: Equipped with intelligent monitoring systems for real-time equipment condition monitoring. Functions include online temperature monitoring, partial discharge detection, and circuit-breaker condition monitoring, enabling comprehensive equipment health assessment and fault预警. Data can be transmitted to control centers via digital interfaces, supporting unmanned substation operation.
Flexible System Configuration: Modular design with building-block combination capability accommodates various main connection schemes. This design suits diverse substation layouts and facilitates future expansion/retrofitting, particularly suitable for phased construction projects.
Harsh Environment Adaptation: Specifically designed for extreme conditions including extreme cold, high altitude, high humidity/heat, and heavy pollution. Fully enclosed structure and aluminum alloy enclosure withstand severe contamination, fog, hail, and other weather conditions.
Energy Efficiency and Environmental Protection: Oil-free and gas-free design meets modern environmental requirements. Aluminum alloy enclosure reduces eddy current losses with low radio interference levels, minimizing environmental impact for installation near urban residential areas.
International Grid Compatibility: Dual-standard compatibility meets both domestic 126kV/50Hz and international 145kV/60Hz requirements, supporting global applications. Certified through complete type tests at China National High Voltage Apparatus Quality Supervision and Inspection Center and CESI Italy.
6. Product Features
The ZF-145 GIS integrates multiple technological innovations and design advantages with the following distinctive features:
Compact Space-Saving Design: Three-phase common tank structure with only 0.8m bay width represents one of the most compact designs among domestic comparable products. This highly compact structure reduces footprint by over 40%, particularly suitable for space-constrained urban substations and underground power facilities.
Exceptional Insulation Performance: Substantial insulation margin with stable performance, having passed complete type tests at 145kV voltage level. Insulation components use imported epoxy resin materials identical to multinational corporations, ensuring stable insulation performance and superior anti-fog flashover capability in humid, contaminated environments.
Advanced Arc Quenching Technology: Circuit-breaker employs thermal expansion plus assisted blowing self-extinguishing technology for enhanced breaking capacity, extended mechanical life, and reduced operating energy. The entire breaker uses only one spring mechanism achieving over 10,000 mechanical operations and 22 short-circuit breaking operations, meeting modern substation fire prevention and oil-free requirements.
Modular Flexible Design: Fully modular design offers flexible structural arrangements to easily accommodate various connection requirements. Building-block combination enables versatile schemes suitable for diverse substation layouts while facilitating future expansion and retrofitting.
Lightweight Corrosion-Resistant Enclosure: Aluminum alloy enclosure provides lightweight (typical double busbar bay ~3,500kg), corrosion resistance, and reduced eddy current losses. Lower foundation requirements significantly reduce civil engineering costs while easing transportation and installation.
Intelligent Monitoring System: Configurable for conventional electrical control or smart digital control with online fault diagnosis and detection. Mature intelligent secondary control and monitoring solutions support remote monitoring and unattended operation.
High Environmental Adaptability: Specifically designed for environments, having passed operational verification under extreme cold, high altitude, high humidity/heat, and heavy pollution conditions. The operating mechanism box employs fully enclosed micro-positive pressure patented design, fundamentally resolving contamination and corrosion issues.
International Certification and Track Record: Product certified by international authoritative bodies with dual-standard domestic/international compatibility. By 2024, nearly ten thousand bays have been deployed globally, with successful market entry in Europe and Latin America, demonstrating international competitiveness.
