Product overview
YBM22 series pre-installed substation is a high-voltage electrical equipment, transformers, low-voltage electrical equipment combined into a compact complete set of power distribution devices, used in urban high-rise buildings, urban and rural buildings, residential areas, high-tech development zones, small and medium-sized factories, mines, oil fields and temporary construction electricity and other places, for the distribution system to receive and distribute electricity. The product has the characteristics of strong complete set, small size, compact structure, safe and reliable operation, convenient maintenance and movable. Compared with regular civil substations, the same capacity of box-type substations usually covers only 1/10~1/5 of regular substations, greatly reducing the design workload and construction volume, and reducing construction costs. In the power distribution system, it can be used in the ring network power distribution system, and can also be used in the dual power supply or radiation terminal power distribution system. It is a new complete set of equipment for the construction and transformation of urban and rural substations. YBM22 series prefabricated substation in line with GB/T17467-1998 "high voltage/low voltage prefabricated substation" national standard.
Model and meaning


Use of environmental conditions
Air temperature: upper limit ≤ 40 ℃, lower limit ≥-10 ℃;
◆ Solar radiation: ≤ 1000 W/m2;
◆ Altitude: ≤ 1000m;
◆ Icing: ≤ 20mm;
◆ Wind speed: ≤ 35 m/s;
◆ Humidity: daily average relative humidity <95%, monthly average relative humidity ≤ 90%, daily average relative water vapor pressure ≤ 2.2kPa, monthly average relative water vapor pressure ≤ 1.8kPa;
◆ Earthquake: ≤ 8 degrees;
◆ No fire, explosion hazard, serious pollution, chemical corrosion and severe vibration of the place.
Note: special conditions of use, when ordering proposed to negotiate with the manufacturer to resolve.
Main technical parameters
Main Technical Parameters | |||||
Serial Number | Name | Unit | High-voltage electrical equipment | Transformer | Low-voltage electrical equipment |
1 | Rated voltage | kV | 10 | 10/0.4 | 0.4 |
2 | Rated current | A | 630 | 100~2500 | |
3 | Rated frequency | Hz | 50 | 50 | 50 |
4 | Rated capacity | kVA | 100~1250 | ||
5 | Rated thermal stability current | kA | 20/4S | 30/1S | |
6 | Rated dynamic stability current (peak value) | kA | 50 | 63 | |
7 | Rated closing short-circuit current (peak) | kA | 50 | 15~30 | |
8 | Rated breaking short-circuit current | kA | 31.5 (fuse) | ||
9 | Rated breaking load current | A | 630 | ||
10 | 1min power frequency withstand voltage | kV | To the ground, interphase 42 Interfracture 48 | 35/28(5min) | 20/2.5 |
11 | Lightning impulse withstand voltage | kV | To the ground, between 75 and 85. | 75 | |
12 | Protection class of shell | IP23 | IP23 | IP23 | |
13 | Noise level | dB | Oil transformer 55, dry transformer 65 | ||
14 | Number of loops | One | 1~6 | 2 | 4~30 |
15 | Maximum reactive power compensation at low voltage side | kvar | 300 |