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This prefabricated substation — also called a box-type or compact substation — integrates a 12 kV high-voltage unit, a 30-2000 kVA transformer and a 400 V low-voltage unit into a single corrosion-protected, IP23-rated enclosure. It is designed for urban and rural distribution networks, industrial parks, residential communities and renewable-energy collection stations.
Technical Specifications
Item
Unit
Parameters
HV Unit
Rated Voltage
kV
12
Rated Main Busbar Current
A
630
Rated Short-time Withstand Current
kA/s
25/2
Rated Peak Withstand Current
kA
63
Rated Short-time Making Current
kA
50
Fuse Breaking Current
kA
31.5 / 40
LV Unit
Rated Voltage
V
400
Rated Main Circuit Current
A
100～4000
Rated Limited Short-circuit Breaking Capacity
kA
80
Rated Operating Short-circuit Breaking Capacity
kA
50 (65)
Rated Short-time Withstand Current
kA/1s
50 (65)
Branch Current, Compensation Capacity
--
As per user's request
Transformer Unit
Rated Capacity
kVA
30～2000
Impedance Voltage
%
4 / 4.5
Tapping Range
%
±2*2.5 / ±5
Connection Symbol
--
Y,yn0 / D,yn11
Enclosure
Protection Level
--
IP23
Sound Level
dB
≤ 55
Key Features
Robust Corrosion-Proof Frame — made of antiseptic groove steel and angle steel for high mechanical strength and rigidity
Flexible Enclosure Materials — available in cold-rolled steel plate, stainless steel plate, aluminum alloy plate or composite color plate
Modular Compartment Layout — separate chambers that can be arranged in various layouts to fit the site
Convenient Maintenance — all rooms equipped with lighting for easy monitoring and servicing
Thermal Control — double-layer roof reduces thermal radiation; transformer cooled by natural ventilation with automatic top axial-flow fan
Damp-Proof Sealing — all rotating connection parts fitted with sealing devices for good moisture resistance
Five-Prevention Safety Interlock — complete anti-misoperation functions on HV side to ensure maintenance safety
Compact & Clean Design — neat appearance that blends into the surrounding environment
Applications
Urban & Rural Distribution Networks — incoming and outgoing feeders for medium-voltage distribution
Industrial Parks & Factories — reliable power supply for production facilities
Residential & Commercial Communities — compact substations for housing estates and commercial areas
Renewable Energy — collection and step-up for wind and solar power stations
Temporary & Construction Power — rapid-deployment supply for construction sites and mining operations
Frequently Asked Questions (FAQ)
What is a prefabricated (box-type) substation?
It is a compact substation that combines the high-voltage switchgear, transformer and low-voltage distribution equipment into one factory-built, pre-wired enclosure, delivered ready for on-site installation.
What voltage and capacity ratings are available?
The HV unit is rated 12 kV, the LV unit 400 V, and the transformer capacity ranges from 30 to 2000 kVA.
What does IP23 mean?
IP23 means the enclosure protects against solid objects larger than 12.5 mm and against water spray, making it suitable for typical outdoor installations.
What is the "five-prevention" function?
It is a set of five anti-misoperation interlocks on the high-voltage side (e.g. preventing opening/closing under load, closing while earthed, entering a live compartment) that protect operators during maintenance.
What is the noise level?
The substation operates at a sound level of 55 dB or below.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Exporter,Trading Company,Seller
Year Established:
1969
Total Annual:
250000000-300000000
Employee Number:
3000~3500
Ecer Certification：
Verified Supplier
Ningbo Tianan (Group) Co, Ltd is a famous leading influential enterprise of the power transmission equipment manufacturing in China.It was founded in 1969,currently under the group, we have 1 national-level R&D center, 2 provincial-level R&D center, 10 professional companies, 70 sales office... Ningbo Tianan (Group) Co, Ltd is a famous leading influential enterprise of the power transmission equipment manufacturing in China.It was founded in 1969,currently under the group, we have 1 national-level R&D center, 2 provincial-level R&D center, 10 professional companies, 70 sales office...
