Rockwill Electric Group
Pad Mounted Transformer
China Pad mounted transformer manufacturer. YBM series pad mounted transformer is ANSI standard compact transformer substation which is manufactured by Rockwill Electric. Excellent cooling and drying system inside. High quality and low cost. ...

Detailed description

  • Description
  • Technical data
  • 12kV/24kV/36kv Prefabricated Substation
  • 36kV/40.5kV Prefabricated Substation
  • Underground Prefabricated substation
  • Miniaturization

Pad mounted transformer

YB() American-pattern tank-type transformer, also called pad-mounted transformer, is a functional and energy saving combined transformer which integrates the high voltage device, low voltage device, transformer and other components. Its small but strong body and high efficiency make it suitable for outdoors and indoors usage. 

The sealed tank is made from high quality stainless steel with special design which helps to protect the devices and reduce the heat inside. Excellent cooling and drying system.

Temperature control system and humidity control system are installed. When the temperature or humidity reaches certain levels, the systems automatically work to maintain the safe condition inside the tank.

It owns loop or dual power supply and terminal power supply two ways of power supply. Therefore, it can serve as a substation. Lower cost and higher efficiency.

It costs less than the traditional distribution house and only covers the area of about 3cbm.

Safe

All the devices are isolated by thick steel board. The efficient insulation system helps to protect the people from electric accident. Easy installation and maintenance
The installation only requires connecting the cables. The fully sealed transformer design keeps the oil away from the air, so it is free of maintenance.

Working conditions:

  • Application: outdoor
  • Working temperature: -25°C ~ +45°C
  • Average temperature of the hottest month: +30℃;
  • Lowest temperature: -25°C
  • Max. difference in daily temperature: 25K
  • Altitude: ≤1,000m
  • Wind pressure: ≤700Pa
  • Daily average humidity: ≤95% (at 25°C)
  • Monthly average humidity: ≤95% (at 25°C)
  • Installation place leaning angle: <3°
  • Ambience requirement: free from fire, blast, chemical corrosion, avoid vibration

 

Item
Unit
Parameter
Rated Voltage Un
HV main loop
kV
12
LV main loop
0.4
Rated Thermal steady current
HV main loop
kA
16
LV main loop
As customer requirement
Rated dynamic steady current
HV main loop
kA
40
LV main loop
kA
As customer requirement
1minPower frequency withstanding voltage
HV switch loop
kV
42
LV main loop
kV
2.5
Assistant loop
kV
2
Lightening impulse withstanding voltage
kV
75
Backup-type fuse short circuit current
kV
40
Insert-type fuse short circuit current
kA
2.5
Sound level
dB
≤50
Protection level
 
IP33

StructureView
HV:1.Manometer; 2.Oil level gauge; 3.Air valve; 4.Oiling plug; 5.Fuse; 6.Thermometer; 7.Load switch operation indicator plate; 8.Load switch; 9.HV cable contactor; 10.Hanging; 11.Tap changer; 12.Earthing&earthing label;13.Dual-purpose valve; 14.HV cable bracket.

LV: 15.Measuring equipment; 16.LV branch; 17.Measurement lead sealing;18.Transformer oil tank.

General

YB() series products is a kind of set of equipment which assembles the MV switch apparatus, transformer, LV distribution equipment together according to fixed connection scheme. This series substation is suitable for neighborhood unit, hotel, large-scale work site and high building that the voltage is 12kV /24kV/36kV/40.5kV, the frequency is 50Hz and the capacity is under 2500kvA.

Rockwill pad mounted transformer manufacturer

Service environment

a) Air temperature: Maximum temperature: +40℃; Minimum temperature:-25℃
b) Humidity: Monthly average humidity 95%; Daily average humidity 90% .
c) Altitude above sea level: Maximum installation altitude: 2500m
d) Ambient air not apparently polluted by corrosive and flammable gas, vapor etc.
e) No frequent violent shake

 

Main technical specifications

Name   Unit   HV equipment   Transformer   LV Equipment  
Rated voltage   kV   12/24/36   (12/24/36)/0.4   0.4
Rated current   A   630 3/75-150/3750 Less than 4000
Frequency   Hz   50
Rated Capacity   kVA   50-2500
Pfr withstand   kV   42/50/70/95 2.5
BIL   kV 75/125/170/185  
Crust Protection Grade     IP23 Oil type 55; dry type 65 IP23
Noisy Grade   dB      
Appearance Dimensions   mm According to primacy wiring circuit schema
hv compart of compact substation LV compart of compact substation transformer compart of compact substation
HV Room   LV Room Transformer Room

 

Main Designation Characteristics

The crust of the substation is designed according to the foreign advanced technology and physical reality. We provide many kinds of crust material such as aluminum alloy steel composite stainless steel board and non metal material(glass fiber).

The HV side use charge switch or vacuum circuit breaker. The transformer could be oil type hermetically-sealed type and dry type.

The proof of the box is double layers structure and between the layers is filled with foam. There are independent boards in HV and LV room, and in the transformer room will install auto thermal controller heater and cooling equipment.

Note: we offer special customized products according to client’s requirement.

compact substation with different appearance

36kV/40.5kV Prefabricated Substation Characteristics

This type substations are the HV side 40.5 kV, LV side 0.4-12 kV and 3 phase outdoor completeequipment .It is wide used in cities , towns ,factories and oil fields, wharfs etc. It is also used insome construction sites. The characteristics are small volume, convenient installation, low cost,high automation safe and reliable operation. Substation is combined with HV switch room,LVswitch room, relay room and transformer room.

 

Main technical specifications for 36kV/40.5kV Prefabricated Substation

Name
Unit
HV equipment
Transformer
LV Equipment
Rated voltage
kV
40.5
40.5/12/0.69/0.4
12/6.3/0.69/0.4
Rated current
A
Less than 1250
 
Less than 4000
Frequency
Hz
50
Rated Capacity
kVA
1250-20000
Pfr withstand
kV
70/95
42/2.5(Auxiliary)
BIL
kV
170/185
75
Crust Protection Grade
 
IP23
Oil type 55; dry type 65
IP23
Noisy Grade
dB
 
 
 
Appearance Dimensions
mm
According to primacy wiring circuit schema
36kV/40.5kV prefabricated transformer substation

 

Main Primary Wiring Circuit Schemas for Substation(40.5kV)

36kV/40.5kV Prefabricated Substation wiring type A

36kV/40.5kV Prefabricated Substation wiring type B

36kV/40.5kV Prefabricated Substation wiring type C

36kV/40.5kV Prefabricated Substation wiring type D

Note: we offer special customized products according to client’s requirement.

This equipments also belong to this Prefabricated substation category with a compact and special function of HV, LV and Transformer are all underground. People can enter into it through a well.

This substation is suitable for installing in square seeded strip and park The clients can choose half-buried type or whole-buried type.

Underground Prefabricated substation

Sketch map of half-buried substation

Sketch map of half-buried substation

Sketch diagram of whole-buried substation

Sketch diagram of whole-buried substation

Miniaturization Intelligent Prefabricated Substation

This series pre-fabricated substation uses imported SF6 ring switch as its HV incoming and outgoing network realized the power ring system easily. And the substation selects integrated automation system which can realize unattended mode.

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