Features and Capabilities

1. The high-voltage switchgear, transformer, and low-voltage switchgear are integrated into a single, highly complete system.

2. High- and low-pressure protection systems are fully implemented, ensuring safe and reliable operation with minimal maintenance requirements.

3. Requires minimal space, involves lower investment, features a short production cycle, and is easy to move around.

4. The wiring solutions are flexible and versatile.

5. Unique Structure: The distinctive honeycomb-style, double-layer (composite panel) enclosure is robust, offering excellent thermal insulation while also providing efficient heat dissipation and ventilation. It boasts a sleek design and high protection levels. Available materials for the enclosure include stainless steel, titanium alloy, aluminum alloy, cold-rolled steel, and color-coated steel panels.

6. Diverse styles: available in universal, villa-style, compact, and other designs.

7. The high-voltage ring main unit can be equipped with a network automation terminal (FTU) to reliably detect short-circuit and single-phase-to-ground faults, featuring "four remotes" functionality for easy upgrades in distribution network automation.

Uses

Widely used in indoor and outdoor settings such as urban grid upgrades, residential communities, high-rise buildings, industrial and mining facilities, hotels, shopping malls, airports, railways, oil fields, ports, highways, and temporary power installations.

Normal operating conditions

● Altitude not exceeding 2,500 m.

● Ambient temperature: -25°C to +40°C.

● Relative humidity: The daily average should not exceed 95%, and the monthly average should not surpass 90%.

● Installation location: Areas free from fire hazards, explosion risks, conductive dust, chemically corrosive gases, and severe vibrations. If these conditions are not met, users are welcome to discuss alternative arrangements with our company.

High-voltage side

Intelligent integrated substations typically use load switch-fuse combination devices for high-voltage protection. Once a single phase fuse blows, the system triggers a three-phase coordinated trip. Load switches come in various types, including pneumatic, vacuum, and sulfur hexafluoride options, and can be equipped with electric operating mechanisms to enable automated upgrades. The fuses employed are high-voltage current-limiting fuses featuring striker mechanisms, ensuring reliable operation, robust breaking capacity, and performance meeting the key technical parameters outlined in the table below. For transformers rated above 800 kV, vacuum circuit breakers such as ZN12, ZN28, or VS1 are recommended for enhanced protection.

Low-pressure side

The main switch on the low-voltage side uses universal or intelligent circuit breakers for selective protection; the feeder switches are equipped with a new type of molded-case circuit breaker that is compact, features short arc distances, and can accommodate up to 30 circuits. Additionally, an intelligent automatic reactive power compensation device is available, offering users the choice between contactor-based and contactless switching methods.

Ordering Instructions (Please specify when placing your order)

1. Substation model and quantity.

2. Transformer model and quantity.

3. High-voltage and low-voltage primary wiring schemes, along with model numbers and parameters of the main components.

4. Material and color of the casing.

5. When attachments or spare parts are needed, please specify the type and quantity required.

6. If the switching equipment is to be used in special environmental conditions, other specific requirements should be clearly specified at the time of order placement.

Transformer

The intelligent integrated substation features low-loss, oil-immersed, fully sealed transformers from the S9, S10, and S11 series. Alternatively, eco-friendly dry-type transformers with resin insulation or NOMEX paper insulation can also be selected. Additionally, a trolley can be installed at the base, allowing for convenient in-and-out movement of the transformer.

Implementation Standards

This product complies with the following standards: GB/T 17467-1998 "High-Voltage/Low-Voltage Prefabricated Substations"; and DL/T 537-93 "Technical Specifications for Ordering 6-35kV Box-Type Substations."

Load Switch Technical Specifications

High-Voltage Fuse Technical Specifications

*Note: Determined by whether or not a striker is installed—N indicates no striker, while A indicates one is present.

Note: (80) refers to the polymer fracture type.

Installation, Use, and Maintenance

In addition to the various regulations required by the power sector for installation, acceptance, handover testing, operation, and maintenance of intelligent integrated substations, please pay attention to the following matters:

A. Upon receiving the goods, users should carefully inspect them according to relevant regulations. For products not installed immediately, they should be stored in an appropriate location under normal usage conditions.

B. The product should be lifted from the bottom using a dedicated lifting device, as shown in Figure 3.

C. The product is carefully placed on the pre-built foundation, and then the gaps between the product base and the foundation are sealed with cement mortar to prevent rainwater from entering the cable compartment. High- and low-voltage cables are subsequently connected through the bottom sealing plates of the high- and low-voltage rooms.

D. After the product is installed in place, ensure reliable grounding is achieved. The two main grounding terminals on the channel steel of the power station base, the neutral point and enclosure of the transformer, as well as the lower terminal of the surge arrester, must all be grounded separately by the installation department. All grounding connections should share a single grounding system, with a grounding resistance of less than 4 ohms. Additionally, at least two grounding conductors must extend from the grounding grid directly to this product.

E. Before putting the product into operation after installation or maintenance, the following inspections and tests should be conducted:

(1) Is the substation clean?

(2) Is the operating mechanism flexible?

(3) Whether the switching of main electrical appliances is flexible and reliable.

(4) Whether the switching of electrical auxiliary contacts is reliable and accurate.

(5) Verify whether the meter readings and relay operations are accurate and reliable.

(6) Are the transformation ratios and wiring polarities of instruments and current/voltage transformers correct?

(7) Are all electrical installation nuts tightened securely, and is the installation firm and reliable?

(8) Are the busbar connections secure, and are the supporting insulators and clamps reliably installed?

(9) Are the setting values of electrical devices compliant with requirements, and are the fuse elements properly specified?

(10) Do the contacts in the main and auxiliary circuits meet the requirements of the electrical schematic diagram?

F. Maintenance

(1) All components in the product shall be maintained according to their respective technical specifications.

(2) If the selected transformer is an oil-immersed type, an oil sample analysis check should be conducted at least once a year as required.

(3) After 20 load-carrying operations or 2,000 no-load switching operations, the high-voltage-side switchgear in operation should have its contacts inspected and the wear level of the arc-extinguishing device assessed. Any abnormalities found应及时 be addressed through repair or replacement.

(4) After a low-voltage switchgear trips automatically, the cause of the trip should be inspected and analyzed. Only after the fault has been resolved can the equipment be restarted.

(5) Lightning arresters should undergo a preventive test once every year before the onset of the rainy season.

*The product is accompanied by a packing list, certificate of conformity, installation and user manual, electrical wiring diagram, and manuals for the key components and equipment used in this product. It also includes the key-operated tool and spare parts provided according to the agreement.*

Figure 3: Schematic Diagram of Product Lifting