ROCKWILL YB Series Compact Substation Solution

1. Introduction​
ROCKWILL Electric presents its advanced YB Series Prefabricated (Compact) Substation solution, designed to deliver safe, reliable, and efficient power distribution for diverse applications. Engineered with modularity, factory prefabrication, and intelligent integration, this solution optimizes space, reduces deployment time, and ensures long-term operational stability. Compliant with international standards (IEC, CEI, GB, JB, DL) and offering customization, ROCKWILL provides complete design, assembly, testing, and support services.

​2. Solution Overview​
The YB Series Compact Substation integrates Medium Voltage (MV) switchgear, power transformers, and Low Voltage (LV) distribution equipment into a single, factory-prefabricated enclosure. Available in US-style and EU-style configurations, it caters to a wide range of voltage levels (12kV, 24kV, 36kV, 40.5kV) and transformer capacities (up to 2500kVA standard, up to 20,000kVA for 40.5kV).

• ​Key Advantages:​​
• ​Rapid Deployment:​​ Factory assembly and pre-commissioning significantly reduce on-site construction and commissioning time compared to traditional substations.
• ​Space Optimization:​​ Compact design ideal for space-constrained locations.
• ​Operational Reliability:​​ Factory-controlled production ensures consistent quality, stability, and long-term performance.
• ​Flexible & Customizable:​​ Wide range of configurations, voltage levels, and enclosure options to meet specific project requirements.
• ​Reduced Maintenance:​​ Modular design allows for easy replacement of functional units.
• ​Cost-Effectiveness:​​ Lower overall project lifecycle costs due to faster installation and reduced footprint.
• ​Compliance & Safety:​​ Adheres to stringent international safety and performance standards.

​3. Core Technical Features​

• ​Modular Design:​​ The substation is divided into independent, pre-tested functional modules:
• High Voltage (HV) Switchgear Compartment
• Transformer Compartment (Oil-immersed Hermetically-Sealed or Dry Type)
• Low Voltage (LV) Distribution Compartment
• Secondary System & Control Compartment
• Building Structure Module
• Benefit: Facilitates transportation, swift on-site assembly, and easy module replacement during maintenance.
• ​Factory Prefabrication & Integration:​​
• Core electrical equipment assembled, wired, and pre-commissioned in controlled factory conditions.
• Secondary systems integrated and pre-wired.
• Building structures precision-manufactured for strength and environmental protection.
• Benefit: Guarantees quality consistency, reliability, and readiness for quick site energization.
• ​Intelligent Integration:​​
• Real-time monitoring of electrical parameters (current, voltage, temperature, etc.) via integrated sensors.
• Communication capabilities for remote monitoring, control, and data analysis.
• Predictive maintenance potential through operational data insights.
• Benefit: Enhances operational visibility, enables remote management, and improves reliability.
• ​Standardized Interfaces:​​
• Unified electrical and mechanical interfaces between modules.
• Benefit: Ensures compatibility, simplifies assembly, improves system stability, and allows potential integration of modules from other compliant manufacturers.
• ​Robust Enclosure Design:​​
• Double-layer structure with foam insulation for thermal and sound protection.
• Wide range of material options for client selection:
• Aluminum Alloy
• Composite Board
• Stainless Steel
• Galvanized Steel
• Non-Metallic (Glass Fiber Reinforced)
• Standard Protection Grade: IP23 (compartments).
• Independently ventilated/compartments with auto thermal control (heaters/cooling in transformer compartment).

​4. Applications​
The YB Series Compact Substation is ideally suited for:

• Urban Grid Renovation & Expansion
• Residential Complexes, Hotels, High-Rise Buildings
• Industrial Plants & Large-Scale Construction Sites
• Commercial Centers
• Remote Area Power Supply
• Temporary Power Requirements
• Infrastructure Projects requiring fast-track deployment.

​5. Environmental Specifications​

• ​Ambient Temperature:​​ -25°C to +40°C
• ​Relative Humidity:​​ Average Monthly ≤ 95%; Average Daily ≤ 90%
• ​Max. Altitude:​​ 2500m above sea level
• ​Environment:​​ Non-corrosive, non-flammable atmosphere; minimal severe vibration.

​6. Key Technical Parameters​

​7. Working Principles​

• ​Power Conversion:​​ Utilizes transformers to step down incoming HV (e.g., 12-40.5kV) to usable LV (e.g., 400V). Current transformers (CTs) scale currents for measurement/protection.
• ​Power Distribution:​​ Uses busbar systems within the LV compartment to collect and distribute power to outgoing circuits, controlled by switchgear (breakers, isolators).
• ​Protection & Control:​​ Equipped with relay protection devices to detect faults (short circuit, overload) and trip breakers. Automated control systems enable real-time monitoring and adjustment.
• ​Communication:​​ Secondary systems transmit measurement, protection, and control signals internally. Network connectivity enables remote data transmission to control centers for SCADA integration.

​8. Customization & Service​

• ​Custom Solutions:​​ ROCKWILL specializes in providing tailored designs based on specific client requirements, including primary wiring schematics (e.g., Type B, Type D for 40.5kV).
• ​Comprehensive Support:​​ Offers full solutions encompassing design, manufacturing, assembly, testing, and commissioning.
• ​After-Sales Service:​​ Provides competent, trained field service representatives for installation guidance, maintenance, repair, and warranty support.