Product overview
The light box type underground box transformer is mainly composed of two parts: an underground transformer installed in the ground (including a prefabricated pit) and an 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, and has been widely used in airports, highways, Bridges, tunnels and other places in China. The interior of the outdoor light box type high and low voltage switchgear is the outdoor high and low voltage distribution cabinet, and the outside of the box is the advertising light box. The content of advertising can be designed according to the surrounding environment and user requirements. The whole product covers a small area, beautiful and generous, not only can be highly coordinated with the surrounding environment, but also can realize the advertising role.
Technical parameters
Name | Unit | Parameter | |
High voltage switch unit | Rated frequency | Hz | 50 |
Rated current | A | 630 | |
1min power frequency withstand voltage (to ground and phase/isolation fracture) | kV | 42/48 | |
Lightning impulse voltage | kV | 75/85 | |
Rated short-time withstand current | kA/2s | 20 | |
Rated peak withstand current | kA | 50 | |
Protection level | IP67 | ||
Low voltage switching unit | Low voltage unit rated voltage | kV | 0.4 |
Main circuit rated current | A | 50-3200 | |
Rated short-time withstand current | kA/1s | 30 | |
Rated peak withstand current | kA | 63 | |
The number of branch circuits is Way | Way | 0~32 | |
Protection level | IP34 | ||
Underground transformer | Transformer unit rated voltage | kV | 10 |
Rated capacity | kVA | 30~1600 | |
Frequency resistance voltage | kV | 35 | |
Lightning impulse voltage | kV | 95 | |
Connection level | Dyn11 | ||
Impedance voltage | 4%/4.5% | ||
Loss of | S11 | ||
Class of pr | IP68 |
Installation diagram
