Features
1. Small size, compact structure and convenient installation;
2. It can be used in ring networks and terminals to reliably
protect personal safety;
3. low damage, low noise, superior performance;
4. The box body adopts anti-theft structure;
5. Low temperature rise and strong overload capacity.
Advantages of American box change
Advantages: small size, small area, easy to place, easy to
camouflage, easy to coordinate with the environment of the
community. The length of low-voltage cables can be shortened, the
line loss can be reduced, and the cost of power supply matching can
be reduced.
Overview
Box-type substation is also called prefabricated substation or
prefabricated substation. It is a kind of high-voltage switchgear,
distribution transformer and low-voltage power distribution device.
It is a factory-prefabricated indoor and outdoor compact power
distribution equipment arranged according to a certain wiring plan.
It organically combines functions such as transformer step-down and
low-voltage power distribution. At the same time, it is installed
in a moisture-proof, rust-proof, dust-proof, rodent-proof,
fire-proof, anti-theft, heat-insulating, fully enclosed, and
movable steel structure box. It is especially suitable for urban
network construction and transformation. A brand new substation.
The box-type substation is suitable for mines, factories,
enterprises, oil and gas fields and wind power stations. It
replaces the original civil power distribution rooms and power
distribution stations, and becomes a new type of complete set of
power distribution devices. Box-type substations are suitable for
residential quarters, urban public transformers, bustling
downtowns, construction power supplies, etc. Users can choose
box-type transformers according to different usage conditions and
load levels. Since its inception, box-type substations have
developed extremely rapidly. Developed countries in Europe have
accounted for 70% of distribution transformers, and the United
States has accounted for 90%. The rapid development of China's
urban modernization and the continuous renewal and transformation
of urban power distribution networks will surely be widely used.
The main technical parameters:
| Serial number | name | unit | technical parameter |
| 1 | Rated voltage | kV | 10／0.4 (high pressure/low pressure) |
| 2 | Maximum working voltage | kV | 12 (High pressure side) |
| 3 | Rated frequency | Hz | 50 |
| 4 | Rated Capacity | KVA | 50-1600 |
| 5 | 1 minute power frequency withstand voltage | kV | 35 |
| 6 | Lightning impulse voltage | kV | 75 |
| 7 | cooling method | | Oil-immersed natural cooling |
| 8 | High-voltage backup fuse breaking current | kA | 50 |
| 9 | Plug-in fuse breaking current | kA | 2.5 |
| 10 | Ambient temperature | ℃ | -35~40 |
| 11 | Allowable temperature rise of coil | K | 65 |
| 12 | No-load voltage regulation | | ±5％or±2x2.5％ |
| 13 | Noise level | dB | 50 |
| 14 | Protection level | | IP44
|
About the maintenance of American box substation
After the American box substation is installed and used, there is
basically no need to maintain it. However, due to various reasons,
the maintenance of the box substation is indispensable for the
products produced in China.
Due to the technical problems of the surface treatment of the
shell, the rust condition should be strengthened;
The oil filled in the tank of American tank transformers is
generally FR3 insulating oil, which has an ignition point of 312°C,
and has excellent electric heating characteristics, high insulation
strength, good lubricity, strong arc extinguishing ability,
non-toxic, and can be biodegraded. Therefore, the harm to the
environment and health is minimized. FR3 insulating oil does not
form sediments like traditional mineral oil, and most of the
domestically produced American box transformers are filled with 25#
ordinary mineral oil. In addition, under normal circumstances, the
upper part of the oil tank of the American box change is filled
with inert gas to prevent the water in the air from being exchanged
into the oil. The domestically produced American box substation may
not have an enterprise to do this work. Over time, the performance
of the oil will be reduced, and its sealing performance cannot meet
the requirements of 7 Psigs, so the oil must be changed regularly.
