YBW-40.5 type series preinstalled substation
YBW-40.5 type series preinstalled substation

Product overview

Preinstalled substation This series of preinstalled substation is a kind of outdoor whole set equipment which is prefabricated in the factory with high-voltage switchgear, distribution transformer and low-voltage distribution equipment according to the one-circuit scheme required by users. Each independent unit is equipped with perfect control, protection, live display and station lighting system. Automatic temperature and humidity control device and regulated ventilation system can be installed in the cabinet.

Range of application

This series of preinstalled substation is suitable for 40.5kV power supply system, urban high-rise buildings, residential areas, industrial and mining enterprises, subways, docks, hotels, shopping malls, parks, stations, schools, hospitals, oil fields, airports, ports and power supply for temporary facilities, power grid connection for wind power generation systems, power supply for road lighting, etc.

Product features

1. Outdoor design, long service life.  
2. Compact design, high practical efficiency.
3. Each compartment spacing board incoming and outgoing line sleeve prevent dust and moisture from entering each compartment.
4. The door, top cover and side plate are equipped with thermal insulating layer, with heat insulation function.
 5. Assemble type structure, replacing every individual unit is very convenient.
6. It's very convenient to disassemble and install each component and part.
7. Can prevent condensation effectively.  
8. The shell is made of recyclable materials and meets environmental requirements.  9. Multi-purpose design, in harmony with the environment.

Main technical parameters

ClassificationProject nameUnitMain technical parameters
High voltage unitRated frequencyHz50
Rated voltagekV7.21240.5
Main busbar rated currentA630 1250 1600
Rated short-time withstand current/timekA/s20/4 25/3 31.5/4
Rated peak withstand currentkA50 63 80
1min Power frequency withstand voltage(to ground/ fracture)kV32/3642/4895/115
Lightning impulse withstand voltage(to ground/ fracture)kV60/7075/85185/215
Rated short-circuit breaking currentkA20 25 31.5
Ground loop short-time withstand current/timekA/s20/2 20/4
Main circuit rated short-circuit making currentkA50 63 80
Rated active load breaking currentA630
Rated closed loop breaking currentA630
Rated cable-charging breaking currentA10
Rated cut-off no-load transformer capacitykVA1250
Rated transfer currentA1700
Mechanical lifeNumber of times3000500010000
Low voltage unitRated frequencyHz50
Rated voltagekV0.4/0.23
Rated insulation voltageV690
Main loop rated currentA100~3200
Rated short-time withstand currentkA/s30/1 50/1 100/1
Rated peak withstand currentkA63 105 176
5s Power frequency withstand voltagekV2.5
Lightning impulse withstand voltage(to ground/ fracture)kVJune 8th
Transformer unitType Oil-immersed typedry-type
Rated frequencyHz50
Rated voltagekV12(7.2)/0.4(0.23)
Rated capacitykVA30~1600
1min Power frequency withstand voltagekV35(25)28(20)
Lightning impulse withstand voltagekV75(60)
Impedance voltage%4 6
Tapping range ±x2.5% ±x5%
Join groups Y,yn0 D,yn11
Box bodyHigh voltage and low voltage chamber protection grade IP33D
Transformer chamber protection grade IP23D
Sound level(oil-immersed type/ dry-type)dB≤50/55
Secondary circuit withstand voltage levelkV1.5/2