Box-type substation is a fully enclosed and movable steel structure box that combines multiple high-voltage switchgear systems, armored busbars, substation integrated automation system, communication, remote control, measuring, capacitor compensation, and DC power supply electrical units.
It is characterized by electromechanical integration, fully enclosed operation, and advanced safety features such as no exposed live parts, corrosion resistance, and fireproof insulation.
The substation has a high degree of automation and can achieve unmanned operation through a comprehensive microcomputer automation system.
It is prefabricated in the factory, shortening the design and manufacturing cycle, and on-site installation only requires a few days.
The combination method is flexible and can be customized according to actual needs, and it is cost-effective, reducing investment by 40% to 50% compared to conventional substations.
The substation has a small footprint, occupying minimal land, making it suitable for use in densely populated areas.
The box-type substation is widely applicable in urban and rural power grids, industrial and mining enterprises, and other power users, and it will play an increasingly important role in the construction of power grids and the improvement of power supply reliability.

Specification

Rated Voltage	12/17.5/24kV	36kV
Standard applicable	IEC 62271 – 202 (IEC 61330)	IEC 62271 – 202 (IEC 61330)
Normal ambient temperature	40 ° C	40 ° C
Maximum ambient temperature	50 ° C	50 ° C
Enclosure construction	Modular	Modular
Ventilation	Natural	Natural
Temperature class (Std.)	K 10	K 10
MV and LV compartment	IP 54	IP 54
Transformer compartment	IP 23	IP 23
Rated voltage (kV)	12/24kV	36kV
Power frequency (kV rms)	28/50	70
Impulse (kV p)	75/125	170
Rated frequency (Hz)	50/60	50/60
Rated normal current (A)	630	630
Breaking capacity (A)	630	630
Making capacity (kA)	52.5 / 40	50
Rated normal current (A)	630	630
Breaking capacity (kA)	21/16	20
Making capacity (kA)	52.5 / 40	50
Rated power (kVA) – oil type	2500	2000
Rated power (kVA) – Dry type	2500	2000
Rated secondary voltage (V)	433	433
Vector group	Dyn 11	Dyn 11
Tapping range	+ 5 in steps of 2.5%	+ 5 in steps of 2.5%
IP	Yes	Yes
Internal arc	Yes	Yes
Enclosure class	Yes	Yes
Impact test	Yes	Yes
Short circuit test on earthing	Yes	Yes