substation prefabricated electric compact substation box type
transformer
product description
The light box type underground box substation is mainly composed of
an underground transformer (including a prefabricated pit)
installed underground and an outdoor advertising light box type
high-voltage switchgear installed on the ground. Among them, the
underground transformer is a new type of distribution transformer
with high-voltage fuse protection and can be submerged in water for
a period of time. It has been widely used in airports, highways,
bridges, tunnels and other places in my country. ; The interior of
the outdoor light box type high and low voltage switchgear is an
outdoor high and low voltage distribution cabinet, and the outside
of the box is an advertising light box. The content of the poster
can be designed according to the surrounding environment and user
requirements. The entire product occupies a small area, is
beautiful and generous, not only can be highly coordinated with the
surrounding environment, but also can achieve the role of
advertising.
Model and its meaning
① Pre-installed
② Substation
③ Underground
④ Transformer rated capacity (kVA)
⑤ Rated voltage of high voltage side (kV)
⑥ Rated voltage of low voltage side (kV)
Conditions of Use
• Relative humidity: the daily average value is not more than 95%;
the monthly average value is not more than 90%
• The installation slope should not exceed 3 degrees, and there is
no place with frequent severe vibration and shock.
• The surrounding air is non-explosive, free from obvious pollution
such as corrosive or flammable gas.
Technical Parameters
high pressure switch unit | Rated frequency | Hz | 50 |
| Rated current | A | 630 |
| Imin power frequency withstand voltage (to ground and phase to
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 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/ls | 30 |
| Rated peak withstand current | kA | 63 |
| Number of branch circuits | Way | 0-32 |
| Protection level | IP34 | |
underground Type transformer | Rated voltage of transformer unit | kV | 10 |
| Rated Capacity | kVA | 30-1600 |
| Frequency withstand voltage | kV | 35 |
| Lightning impulse voltage | kV | 95 |
| Connection level | Dynll | |
| Impedance voltage | 4%/4.5% | |
| loss | Sil | |
| Protection level | IP68 | |
Installation dimension drawing
Conditions of Use
Note:
• This product is composed of an underground transformer, a light
box outdoor high/low voltage switch cabinet and a preset pit.
•The light box type outdoor high/low voltage switch cabinet is a
double-door design, even if the light box is damaged, the high and
low voltage equipment still has independent enclosure protection.
•The pre-built pit is a fully sealed and waterproof design; the pit
cover is covered with high decorative floor tiles, and a lockable
manhole cover is set.
• Both the high-voltage side and the low-voltage side of the
underground transformer adopt the connection method of three-phase
cable plugging and unplugging at the same time, and the sealing
performance reaches the IP68 level, and it can be immersed in water
for a long time.
