The SCB NX2 10kV resin cast dry-type distribution transformer engineered with a capacity range of 100 kVA to 2,500 kVA provides reliable electrical energy conversion for commercial and industrial distribution projects. Designed to comply strictly with the GB20052-2024 Energy Efficiency Grade 2 standard, this transformer operates with significantly reduced active and reactive losses compared to legacy designs. Industrial engineers specifying equipment for energy-conscious facilities can rely on its advanced vacuum-cast construction to ensure long-term operational stability and lower lifecycle costs.
Modern facility managers face continuous challenges regarding energy consumption spikes, thermal management limits, and safety compliance in indoor substations. Traditional oil-immersed transformers present fire hazards and require costly containment infrastructure, while older dry-type units often suffer from high electrical losses and core degradation over time. The 10kV NX2 resin cast distribution transformer resolves these engineering hurdles by implementing advanced foil windings and a high-grade grain-oriented silicon steel core. The system utilizes a vacuum pressure casting process with epoxy resin to encase the high-voltage windings completely, protecting the copper or aluminum conductors from environmental moisture, chemical vapors, and mechanical stress. With standard vector groups like Dyn11 and Yyn0 delivering a low-voltage output of 0.4 kV, the unit effectively mitigates harmonic distortions and maintains balanced three-phase distribution across complex industrial networks.
Technical Specifications
Rated Primary Voltage: 10 kV @ 50 Hz
Rated Secondary Voltage: 0.4 kV @ No-Load
Capacity Range: 100 kVA - 2,500 kVA @ Continuous Duty
Energy Efficiency Standard: GB20052-2024 Grade 2 @ Reference Temperature 75°C
Winding Material: Copper or Aluminum Foil @ Customer Specification
Core Material: Cold-Rolled Grain-Oriented Silicon Steel Sheet @ High Permeability
Cooling Method: AN (Air Natural) or AF (Air Forced) @ Ambient Temperature 40°C max
Vector Group: Dyn11 or Yyn0 @ Standard Configuration
Insulation System Temperature Class: Class F (155°C) or Class H (180°C) @ Hot Spot Limit
Enclosure Protection Level: IP00 (Standard) or IP20/IP23 (With Enclosure) @ Indoor Installation
Partial Discharge Level: < 10 pC @ Rated Voltage
Product Overview and Key Features
The SCB NX2 10kV resin cast distribution transformer represents a state-of-the-art solution for indoor electrical distribution, operating within a system voltage of 10 kV and covering capacities from 100 kVA to 2,500 kVA. It serves as an advanced iteration exceeding conventional NX3 models by achieving superior energy efficiency under the GB20052-2024 Grade 2 standard. This classification ensures that active load and no-load power losses are driven down substantially, yielding continuous electricity savings throughout the operational lifespan of the equipment.
The vacuum-cast epoxy resin winding technology provides exceptional moisture resistance, mechanical strength against short-circuit electrodynamic forces, and low partial discharge values. The foil-wound configuration improves current distribution across turns, preventing localized hot spots and enhancing thermal dissipation. Its completely oil-free composition removes fire risks and eliminates fluid leakage concerns, making it an ideal choice for enclosed urban infrastructures and high-density commercial real estate.
Operating without flammable cooling oils also means routine fluid sampling and fire suppression system maintenance are entirely unnecessary. The low-noise acoustic profile allows engineers to place the unit close to actual load centers, minimizing secondary cable run lengths and associated copper losses. Furthermore, optional thermal monitoring suites incorporating PT100 sensors and RS485 communication ports enable real-time temperature tracking via remote supervisory control systems.
The core assembly relies on mitred-step joints made from high-permeability grain-oriented silicon steel sheets, drastically cutting down magnetic flux leakage and excitation current. Cooling is managed naturally via ambient air circulation (AN) or augmented through auxiliary fans (AF) when operating under sustained overload conditions. This design philosophy guarantees structural integrity, high thermal inertia, and dependable electrical isolation under demanding operating cycles.
Technical Specifications, Applications and Selection Guide
The deployment of this transformer spans multiple heavy-duty and sensitive application scenarios, including data centers, hospitals, commercial complexes, and industrial manufacturing plants. Facility planners in these sectors must prioritize acoustic emission limits, strict fire safety codes, compact spatial footprints, and high energy efficiency ratings. Data centers and healthcare facilities, in particular, demand continuous uptime and low operational noise, which makes the indoor-rated dry-type design exceptionally well-suited.
The selection workflow begins by verifying the primary system voltage and determining the required apparent power capacity between 100 kVA and 2,500 kVA based on peak load calculations. Next, engineers must specify the target energy efficiency tier, ensuring alignment with local regulatory mandates such as GB20052-2024 Grade 2. Enclosure requirements must then be matched to the installation environment, choosing between open chassis IP00 for dedicated electrical rooms or protective enclosures up to IP23. Finally, special environmental parameters and auxiliary monitoring features should be integrated into the specification sheet.
Customization pathways remain available for unique projects requiring non-standard vector groups, dual low-voltage outputs, higher ambient temperature tolerances, or specialized marine-grade anti-corrosion treatments. For complex requirements involving strict harmonic compliance or restricted vault dimensions, technical consultation ensures proper matching. Beijing Zhongping Technology provides expert guidance during this phase, assisting engineering teams with detailed cross-reference selections and matching replacement hardware to fit unique project constraints.
Installation, Integration and Compliance
Mechanical installation requires securing the transformer base to a reinforced concrete foundation using designated anchor bolts or utilizing integrated swivel rollers for precise positioning within substations. Enclosure protection levels must match environmental conditions, typically utilizing IP20 or IP21 for clean indoor substations to prevent foreign object ingress. High-voltage connections are established via secure terminal studs or separable elbow connectors, while low-voltage paths utilize flexible copper busbars or heavy-duty cables.
Taps for voltage adjustment are managed through off-circuit link boards located on the high-voltage winding terminals, and adjustments must strictly occur while the system is fully de-energized and grounded. Temperature monitoring equipment relies on embedded PT100 resistance temperature detectors placed directly inside the low-voltage windings. These sensors link to an external digital temperature controller providing programmable alarm and trip relay outputs, alongside optional RS485 or 4-20 mA analog signals for SCADA integration.
Cable routing procedures dictate that high-voltage cables should enter from designated floor trenches or overhead trays while maintaining appropriate electrical clearance from low-voltage control lines. All control wiring for temperature sensors and fan power supplies must utilize shielded twisted-pair cables to prevent electromagnetic interference from power conductors. Grounding loops must be avoided by connecting the core, enclosure framework, and neutral points securely to the facility earth grounding grid in compliance with relevant electrical safety codes.
Reliability and Environmental Durability
The internal structural layout is engineered to withstand extreme mechanical forces generated during sudden downstream electrical short circuits. Vacuum casting eliminates micro-voids within the epoxy resin matrix, ensuring high dielectric strength and preventing internal electrical tracking over decades of continuous operation. Thermal endurance is governed by Class F or Class H insulation systems, providing significant safety margins against temporary overloads.
The external surfaces of the cast windings resist airborne conductive dust, chemical moisture, and corrosive industrial atmospheres without degrading performance metrics. Routine maintenance is minimal, requiring only periodic visual inspections of the terminal connections and dry-air dusting of the cooling ducts during planned facility outages. Calculated Mean Time Between Failures remains exceptionally high, supporting uninterrupted industrial workflows.
Frequently Asked Questions (FAQ)
1. Q: What are the current stock availability levels and standard delivery timelines for this transformer?
A: Beijing Zhongping Technology maintains active regional reserves of standard configurations to ensure rapid dispatch and minimize operational downtime caused by long manufacturing lead times.
2. Q: What warranty coverage applies, and what is the standard protocol for handling RMA claims?
A: Units are backed by a comprehensive 12-month operational warranty supported by Beijing Zhongping Technology, which includes pre-shipment quality verification documents and technical assistance for replacement processing.
3. Q: What are the primary structural differences and application choices between copper and aluminum windings?
A: Copper windings offer higher electrical conductivity and superior mechanical strength, allowing for a more compact footprint, whereas aluminum windings provide a lighter and more cost-effective alternative for standardized installations.
4. Q: Can this 10kV resin cast transformer be installed outdoors?
A: The standard configuration is rated for indoor use within a protected enclosure; outdoor deployment requires a specialized weatherproof housing rated at least IP23 with anti-condensation heating provisions.
5. Q: What level of temporary overload capacity can this transformer handle safely?
A: The unit supports standard short-term overloads in accordance with IEC guidelines, provided that winding hot-spot temperatures do not exceed the thermal limits of the Class F or Class H insulation system.
6. Q: What specific maintenance procedures are required during routine operations?
A: Due to the solid-state resin encapsulation and oil-free design, maintenance is limited to periodic dust removal from cooling surfaces and torque checks on high- and low-voltage electrical terminals.
7. Q: How does the acoustic noise level perform in sound-sensitive environments like hospitals?
A: The core-coil assembly is mechanically isolated from the base frame using vibration dampening pads, keeping acoustic emissions well below standard building codes for noise-sensitive indoor spaces.
8. Q: What is the exact operational meaning of the GB20052-2024 Grade 2 energy efficiency rating?
A: This standard dictates stringent upper limits for both no-load core losses and load-dependent copper losses, guaranteeing that the transformer consumes less electrical energy during continuous operation than older legacy designs.
FAQ
1.Who are We?
Beijing Zhongping Technology Co., LTD., is a global industrial electrical automation service provider, is a scientific research, design, marketing, technical services, industrial Internet, international import and export services as one of the science and technology companies.
2.What can you buy from us?
PLC, inverter, human-machine interface, hydraulic products, low-voltage power distribution, industrial robots and core components
3.Is the item in stock or need to be purchased from another supplier?
We have a large inventory of goods and have our own warehouse.
4.What advantages do we have over other suppliers?
Our company has a large amount of inventory and a number of warehouses, but also in the country's important industrial provinces and cities with offices and a number of overseas service points. To provide you with intelligent manufacturing one-stop comprehensive services, save efforts, labor and cost.
5.Can you provide 100% new original authentic products?
We only sell new original genuine, no renovation, no fake, only for the original factory original!
6.How long is the delivery time?
If there is a stock, it will take 2-3 working days to ship, if the quantity is large, it will take 5-7 working days after receiving the payment, if it is not a conventional model, it will take some time, we will inform you of the specific delivery time.
7.Is there technical support available?
Of course, we have a professional technical team that can help you solve technical problems.
8.How do we guarantee quality?
We have three processes to control the quality of goods.
1) Our engineers will inspect the production and quality control in the factory regularly.
2) Incoming materials shall be inspected by experienced purchasing engineers before they can be stored.
3) At least 2 people in the logistics department cross-check the goods to be sent before delivery.
9.Can you guarantee the safe and reliable delivery of your products?
Yes, we strictly adopt the international standard packing. We also use special packaging for dangerous goods, and refrigerated shipping for items with temperature requirements. Special item packaging and general cargo standard packaging requirements may incur additional costs.
10.How about the freight?
The cost depends on how you choose to get the goods. Express is usually the fastest but also the most expensive way. Sea freight is the best solution for large quantities of goods. The exact shipping cost depends on the purchase amount、quantity and weight of your order. Please feel free to contact us for more information.
+86 010-64225983
+8613811814778
Building 26, Liyuan Community, Chaoyang District, Beijing, China
