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Compact / Prefabricated Substations — YB Series

A complete load-center unit — transformer, HV switchgear, LV switchgear, and enclosure — built to GB/T17467, the national HV/LV prefabricated substation standard. 50–1000kVA, IP33 enclosure protection.

Type Description

One enclosure, fully erected at the load center.

The YB series prefabricated substation is made in accordance with GB/T17467, comprising the transformer, HV switchgear, LV switchgear, and enclosure as a single unit. It can be erected directly at the load center, with the advantages of small size, reliability, and easy installation — suitable for residential communities, mining industry sites, hotels, hospitals, parks, stations, oil fields, airports, and other outdoor temporary facilities.

  • 1
    Compact, transport-ready structure with anticorrosion, heat-proof, and moisture-proof measures matched to the service environment, and color painting coordinated with the surrounding site.
  • 2
    Ventilated cooling system combining natural ventilation ducts and cooling fans, with a thermal barrier in the enclosure to keep operation stable under overload or overheat conditions.
  • 3
    Complete monitoring, alarming, and protection function built in for operator convenience and protection.
YB series compact prefabricated substation enclosure
StandardGB/T17467
Capacity50–1000kVA
EnclosureIP33
Loops≤22 LV / 3 HV
Engineering Data Sheet

Primary side, transformer, and secondary side ratings.

SubjectUnitPrimary SideTransformerSecondary Side
Rated VoltagekV1010/0.40.4
Max. Working VoltagekV12—0.4
Rated CapacitykVA—50–1000—
Rated CurrentA≤630—≤1600
Rated Short-Circuit Breaking CurrentkA52—30, 50
Rated Short-Time Withstand CurrentkA/s20/220/330/1, 50/1
Rated Short-Circuit Closing CurrentkA50—63, 105
Rated Peak Withstand CurrentkA / s50/0.3—50/0.3
Power-Frequency Withstand (1min)kV35/28—2.5/2.0
Sound LeveldBOil type ≤55 / Dry type ≤65
Number of LoopsUnit31≤22
Protection Degree—IP33—Isolation break: 48mm · Phase-to-phase / phase-to-ground: 42mm

Above data reproduced as published in the source datasheet; actual value to be confirmed by factory at order placement.

Service Conditions

Rated environment envelope — substation enclosure.

Ambient Temperature−30°C to +40°C
Altitude≤ 1000m
Relative Humidity≤ 90% (+25°C)
Wind Speed≤ 35 m/s
Seismic — Horizontal≤ 0.4 m/s²
Seismic — Vertical≤ 0.2 m/s²
Site RestrictionsKeep clear of fire, explosion risk, dirty/chemically corrosive atmosphere, and strenuous vibration sources

Siting a load center for a new development or temporary facility?

Tell us the capacity and site conditions and our engineers will return a certified GB/T17467 substation specification.

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