Product overview

YBD – 12 series landscape underground box substation mainly consists of underground transformer (including prefabricated pit) installed underground and outdoor advertising light box type high and low voltage switchgear installed on the ground. Among them, the underground transformer is a new type of distribution transformer with high – voltage fuse protection, which can be submerged in water for a period of time. It has been widely used in airports, highways, bridges, tunnels and other places in China; the interior of outdoor light box type HV/LV switchgear is outdoor HV/LV distribution cabinet, and the exterior of the box is advertising light box. We can design the content of the poster according to the surrounding environment and user requirements. The whole product covers a small area, and is beautiful and generous, not only can be highly coordinated with the surrounding environment, but also can achieve the advertising role.

Model and meaning

Service condition

● Altitude: no more than 1000m;

● Ambient temperature: maximum temperature +50 ℃, minimum temperature -25℃;

● Relative humidity: daily average value is not more than 95%; the monthly average value shall not be greater than 90%. The installation slope shall not exceed 3 degrees, in place without frequent severe vibration and impact;

● The surrounding air shall be free from explosive, corrosive, combustible gas and other obvious pollution;

Note: When ordering this product beyond the above conditions, please consult with our company.

Technical parameter

● Rated voltage level: 35kV and 10kV and below

● Frequency: 50Hz

● Insulation level (see the table below)

	Rated voltage of high-voltage unit	kV	10
High voltage switch unit	Rated frequency	Hz	50
	Rated current	A	630
	1min power frequency withstand voltage (to ground and interphase/isolating distance)	kV
	Lightning impulse voltage	kV	75/85
	Rated short-time withstand current	kA/2s	20
	Rated peak withstand current	kA	50
	Degree of protection	IP67
Low voltage switch unit	Rated voltage of low-voltage unit	kV	0.4
	Rated current of main circuit	A	50~3200
	Rated short-time withstand current	kA/1s	30
	Rated peak withstand current	kA	63
	Number of branch circuits	Way	0~32
	Degree of protection	IP34
Underground transformer	Rated voltage of transformer unit	kV	10
	Rated capacity	kVA	30~1600
	Power frequency withstand voltage	kV	35
	Lightning impulse voltage	kV	95
	Connection level	Dyn11
	Impedance voltage	4%/4.5%
	Loss	S11
	Degree of protection	IP68