Box type substationPRODUCT Mini Substation

Mini Substation

Rated voltage	10KV
Rated capacity	30–2000kVA
Application scenarios	used in urban power grid transformation, residential communities, industrial parks, commercial centers, airports, stations, ports, and other electrical power distribution applications.

Product Overview

The compact and intelligent prefabricated substation is more flexible than conventional substations.
It is widely used in urban power grid transformation, residential communities, industrial parks, commercial centers, airports, stations, ports, and other electrical power distribution applications.

The prefabricated substation (also called compact substation) consists of high-voltage switchgear, transformer, and low-voltage distribution equipment. The enclosure is generally divided into three compartments: high-voltage chamber, transformer chamber, and low-voltage chamber, arranged in a “目” or “品” shaped structure. The transformer serves as the main body, while the high-voltage load switch and fuse are installed inside the transformer tank, forming an integrated compact structure.

Functions and Features

The compact and intelligent European-style prefabricated substation combines the advantages of high-voltage load switches, high-voltage current-limiting fuses, and low-voltage circuit breakers. It provides reliable electrical and mechanical protection against overload and short-circuit faults.

The enclosure adopts advanced anti-corrosion treatment technology, offering excellent corrosion resistance and durability. The structure is flexible, convenient for transportation and installation, occupies less space, and operates safely and reliably.

The compact European-style substation uses high-performance insulating materials and advanced electrical design, making the overall structure compact and aesthetically pleasing while meeting modern power distribution requirements. It also features low investment cost and high economic efficiency.

YB□-12 Compact European-Type Substation

Low Voltage Side

The low-voltage side main switch uses a universal or molded-case circuit breaker with selective protection.
The outgoing switch adopts a new type plastic-case switch featuring compact size and flexible operation, with up to 30 outgoing circuits available.

It can be equipped with reactive power compensation devices, supporting both contactor and non-contact automatic reactive power compensation solutions.

Transformer

The intelligent integrated substation can be equipped with dry-type transformers, oil-immersed transformers, fully enclosed S9, S10, and S11 series transformers, as well as amorphous alloy transformers and NOMEX insulated dry-type transformers.

A base frame with rollers is installed beneath the transformer for convenient movement and installation.

Technical Parameters

Load Break Switch Technical Parameters

No.	Item	Unit	FN12-12 Load Break Switch	FZN25-12 Indoor Vacuum Load Break Switch
1	Rated Voltage	kV	10	10
2	Maximum Operating Voltage	kV	12	12
3	Rated Frequency	Hz	50	50
4	Rated Current	A	630	630
5	Rated Short-Time Withstand Current	A	630	630
6	Rated Short-Circuit Making Current (RMS)	kA/s	20/2	20/4
7	Dynamic Stability Current	kA	50	50
8	Short-Time Withstand Current (Peak)	kA	50	50
9	Full Load Breaking Times	Times	20	10000
10	Mechanical Life	Times	2000	10000
11	1 min Power Frequency Withstand Voltage (Phase-to-Phase / Phase-to-Ground)	kV	42	42
12	Lightning Impulse Withstand Voltage (Phase-to-Phase / Phase-to-Ground)	kV	75	75

High Voltage Fuse Technical Parameters

British Model	Domestic Model	Rated Voltage (kV)	Rated Current (A)	Breaking Current (kA)	Fuse Rated Current (A)
SDL*J		12	40	31.5	6.3, 10, 16, 20, 25, 31.5, 40
SFL*J	XRNT-12	12	100	31.5	50, 63, 71, 80, 100
SKL*J		12	125	31.5	25

Low Voltage Circuit Breaker Technical Parameters

Model	Trip Unit Type	Rated Current of Trip Unit (A)	Breaking Capacity kA (AC380V)
DW15-630	Thermal-Magnetic Type	315, 400, 630	40
DW15-1000	Electronic Type	630, 800, 1000	50
DW15-1600		1600	50
DW15-2500		1600, 2000, 2500	60
CW1-2000	Intelligent Type	630, 800, 1000, 1250, 1600, 2000	65(80)
CW1-3200		2000, 2500, 3200	100

High Voltage Unit

Item	Unit	Parameter
Rated Frequency	Hz	50
Rated Voltage	kV	6 / 10 / 35
Maximum Operating Voltage	kV	6.9 / 11.5 / 40.5
Rated Current	A	400, 630, 1250
Transfer Current	A	1200–3150
Power Frequency Withstand Voltage (to Ground & Between Phases / Isolation Fracture)	kV	42/48
Lightning Impulse Withstand Voltage (to Ground & Between Phases / Isolation Fracture)	kV	75/85
Rated Short-Circuit Breaking Current (Current Limiting Fuse)	kA	31.5