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Home > Electrical & Electronics > Passive Components > Capacitor > 15-40kVA Three-Phase Dry Type Isolation Transformer 660V to 400V/380V/220V for Mining Equipment

15-40kVA Three-Phase Dry Type Isolation Transformer 660V to 400V/380V/220V for Mining Equipment

15-40kVA Three-Phase Dry Type Isolation Transformer 660V to 400V/380V/220V for Mining Equipment thumbnail-3

15-40kVA Three-Phase Dry Type Isolation Transformer 660V to 400V/380V/220V for Mining Equipment thumbnail-4

15-40kVA Three-Phase Dry Type Isolation Transformer 660V to 400V/380V/220V for Mining Equipment thumbnail-5

15-40kVA Three-Phase Dry Type Isolation Transformer 660V to 400V/380V/220V for Mining Equipment photo-1

15-40kVA Three-Phase Dry Type Isolation Transformer 660V to 400V/380V/220V for Mining Equipment photo-2

15-40kVA Three-Phase Dry Type Isolation Transformer 660V to 400V/380V/220V for Mining Equipment photo-3

15-40kVA Three-Phase Dry Type Isolation Transformer 660V to 400V/380V/220V for Mining Equipment photo-4

15-40kVA Three-Phase Dry Type Isolation Transformer 660V to 400V/380V/220V for Mining Equipment photo-5

Product Spotlights

Designed for harsh mining environments, this 15-40kVA three-phase dry-type isolation transformer safely steps down 660V to 400V/380V/220V. Its oil-free construction ensures safety and low maintenance, while robust Class H insulation resists dust, moisture, and thermal stress. Offers galvanic isolation to protect sensitive equipment, configurable outputs, and high efficiency. Ideal for powering crushers, conveyors, and drills with reliability.

US$ 159 ≥1 Unit

Key Specifications

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Type:

Other, Dry Type, Isolation

Application:

Other, Power Supply for Mining Equipment

Power Rating:

15-40 kVA

Contact Supplier Request Quote Chat Now

Jinhua Dika Electrical Equipment Co., Ltd.

1Yr

Payment & Shipping

Payment Methods:

Port of Shipment:

China

Delivery Detail:

Delivery time depends on order quantity.

Product Details
Company Profile
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Type Other, Dry Type, Isolation

Application Other, Power Supply for Mining Equipment

Power Rating 15-40 kVA

Primary Voltage 660V

Secondary Voltage 400V/380V/220V

Phase Three-Phase

Cooling Method AN/AF (Air Natural/Air Forced)

Insulation Class Class H (180°C)

Protection Level IP23 (Standard), Higher IP ratings optional

Mounting Floor-mounted or wall-mounted options

As a specialized manufacturer with over a decade of expertise in electrical equipment, Jinhua Dika Electrical Equipment Co., Ltd. proudly presents its robust 15-40kVA Three-Phase Dry Type Isolation Transformer. Engineered specifically for the demanding environments of the mining industry, this transformer provides a critical and reliable solution for stepping down 660V power to safe and usable 400V, 380V, or 220V levels. Our commitment to quality, evidenced by a comprehensive management system, ensures that every unit delivers exceptional performance, safety, and durability where it matters most.

This transformer is designed to be the backbone of your mining power distribution, offering isolation to protect sensitive equipment from power surges, harmonics, and ground loops. Its dry-type construction eliminates fire and environmental hazards associated with liquid-filled transformers, making it a safer choice for underground and surface mining applications.

Core Product Features & Technical Advantages:

Robust Construction for Harsh Environments: The transformer core and windings are meticulously crafted using high-grade, low-loss silicon steel and high-temperature enameled copper/aluminum wire. The entire assembly is vacuum-impregnated with Class H (180°C) insulation varnish and resin, providing superior resistance to moisture, dust, chemicals, and thermal stress commonly found in mining operations.
Flexible Voltage Configuration: The secondary side offers multiple tap connections, allowing output voltages to be configured as 400V, 380V, or 220V three-phase, catering to various international standards and specific equipment requirements within the mine.
Enhanced Safety & Protection: As a true isolation transformer, it provides galvanic separation between the primary (660V) and secondary circuits. This critical feature safeguards personnel and equipment from electric shock hazards and protects downstream mining machinery from voltage spikes and noise on the primary supply.
Low Maintenance & High Efficiency: The dry-type design requires no oil monitoring, filtering, or containment, drastically reducing lifetime maintenance costs. Optimized electromagnetic design ensures high energy efficiency across the 15-40kVA load range, leading to lower operational expenses.
Adaptable Enclosure & Cooling: Standard units feature a sturdy, ventilated enclosure with IP23 protection. For areas with excessive dust or moisture, higher IP ratings (e.g., IP54, IP55) are available. Cooling is achieved through natural convection (AN) or forced air (AF) for higher density installations, ensuring stable operation even under full load.

Detailed Technical Specifications:
The table below outlines the key parameters for our standard 15-40kVA isolation transformer series. Custom specifications are available upon request.

Parameter	Specification
Rated Capacity	15 kVA, 20 kVA, 25 kVA, 30 kVA, 35 kVA, 40 kVA
Frequency	50Hz / 60Hz
Primary Voltage	660V AC, Three-Phase
Secondary Voltage	400V / 380V / 220V AC, Three-Phase (Configurable)
Vector Group	Dyn11, Yyn0, or as required
Insulation Class	Class H (180°C)
Temperature Rise	≤ 125K (by resistance)
Noise Level
Cooling Method	AN/AF (Air Natural / Air Forced)
Protection Degree (Enclosure)	IP23 (Standard), IP54/IP55 (Optional)
Standards	IEC 60076, GB 1094.11, or other equivalent standards

Benefits for Your Mining Operation:

Equipment Longevity: By providing clean, stable, and isolated power, the transformer significantly reduces electrical stress on costly mining equipment like crushers, conveyors, pumps, and drilling rigs, extending their service life.
Operational Safety: The isolation feature and flame-retardant dry-type construction minimize risks of electrical fires and toxic spills, enhancing overall site safety for personnel.
Reduced Downtime: High reliability and minimal maintenance requirements translate into fewer unexpected failures and higher overall equipment availability.
Global Compliance: Manufactured in a facility adhering to recognized management standards, our transformers are designed to meet international electrical norms, facilitating their use in diverse markets from North America and Europe to Southeast Asia and Africa.

Backed by Jinhua Dika's proven track record of exporting to over a dozen global regions including North America, Eastern Europe, Southeast Asia, Africa, and Oceania, and supported by an annual export value reflecting consistent quality and customer trust, this transformer series represents a reliable investment. Our capability to ship from major Chinese ports like Shanghai, Tianjin, Guangzhou, and Ningbo ensures efficient logistics. Choose our 15-40kVA Three-Phase Dry Type Isolation Transformer to power your mining equipment with confidence, safety, and efficiency. Contact us today for a detailed quotation or to discuss your specific application requirements.

Frequently Asked Questions (FAQ):

Q: Why is a dry-type transformer preferred over an oil-filled one for mining?
A: Dry-type transformers use air or solid insulation, eliminating risks of oil leaks, fires, and environmental contamination. This makes them inherently safer for confined or hazardous spaces like mines and requires less complex installation (no oil containment pits).
Q: Can this transformer handle voltage fluctuations common in mining power grids?
A: Yes, it is designed with robust insulation and core materials to withstand typical voltage variations. For extreme or frequent fluctuations, optional voltage regulation or tap changers can be incorporated.
Q: What is the delivery lead time for a standard 30kVA unit?
A: For standard specifications, lead time is typically 15-30 working days after order confirmation. Expedited production may be available.
Q: Are these transformers suitable for outdoor installation at the mining site?
A: The standard IP23 enclosure is for indoor use. For outdoor installation, we strongly recommend ordering a higher protection degree (e.g., IP54 or IP55) to guard against rain, dust, and particulates.
Q: Do you provide custom voltage ratios outside of 660V to 400V/380V/220V?
A: Absolutely. As a manufacturer, we can design and produce transformers with various primary and secondary voltage combinations to match your specific site distribution voltage.
Q: What kind of after-sales support and warranty do you offer?
A> We provide comprehensive technical support and a standard warranty period. Specific warranty terms are provided with the commercial quotation.
Q: Can the transformer be configured for different electrical system earthing arrangements?
A: Yes, by selecting the appropriate vector group (like Dyn11 or Yyn0), the transformer can be adapted for systems requiring isolated neutral, grounded neutral, or other specific earthing needs.
Q: What are the main installation requirements?
A: The unit requires a solid, level foundation (for floor-mounted types) or a sturdy wall (for wall-mounted types) with adequate clearance for ventilation as per the installation manual. All electrical connections must be performed by qualified personnel.