American box type YBW series prefabricated compact substation
• Standards: IEC60076,IEC1330,ANSI/IEEE C57.12.00 ,C57.12.20 ,C57.12.90,BS171,SABS 780
• The box type substation is based on advantage of European box YBW substation,which reduces the cost,and solves such defects ad high cost,incomplete protection and poor ventilation and radiation of the European products.
• The products is applicable for various wind power plants and is the best fitted product for wind power generation system.
Service conditions of American box type substation
| Normal service conditions of substationas follows: | |
| Ambient temperature: | |
| Maximum | +40°C |
| Maximum 24 hour average | +35°C |
| Minimum (according to minus 15 indoor classes) | -25°C |
| Ambient humidity: | |
| Daily average relative humidity | less than 95% |
| Monthly average relative humidity | less than 90% |
| Earthquake intensity | less than 8 degree |
| Height above sea level | less than1000m |
This product should not be used under conditions of fire, explosion, earthquake and chemical corrosion environments.
Technical specification of American box type substation
|
No. |
Description |
Data |
|
1 |
General |
|
|
Standard of production & testing |
IEC62271-1, IEC62271-200,IEC62271-202,IEC60076,IEC61439, IEC60529,IEC62262, IEC60721 |
|
|
Composition of distribution substation |
||
|
No. of medium voltage compartment |
1 |
|
|
No. of transformer compartment |
1 |
|
|
no. of low voltage compartment |
1 |
|
|
2 |
Medium Voltage compartment |
|
|
protection class |
IP43 |
|
|
Service rated voltage ( kV) Available |
15 ( suitable in 10 , 11, 13.8,) KV |
|
|
Voltage variation of the system, % |
10% |
|
| 1min power frequency withstand voltage (to-ground/between open contacts) | 32/36 42/48 | |
| Lightning impulse withstand voltage (to-ground/between open contacts) | 60/70 75/85 | |
|
2.1 |
Ring Main Unit (RMU) |
incoming 2 + outgoing 1 (can be choosed & decided by the clients) |
|
load break switch with earthing switch |
2 |
|
|
type |
SF6 |
|
|
Frequency |
50/ 60 Hz |
|
|
Power frequency withstand voltage ,kV(Rms) |
38 |
|
|
Rated lightning impulse withstand voltage,kV (Peak) |
95 |
|
|
rated current |
630 A |
|
|
Rated short-time withstand current for 1s |
25 kA |
|
|
2.2 |
Vacuum circuit breaker with earthing switch and isolator |
1 |
|
type |
vacuum |
|
|
nominal voltage |
15kV( suitable in 10 , 11, 13.8, ) |
|
|
Rated power frequency withstand voltage |
38 kV |
|
|
Rated lightning impulse withstand voltage |
95kV |
|
|
Current rating, A |
Depends on the rating of the transformer |
|
|
Rated short-time withstand current for 1S |
25kV |
|
|
2.3 |
High voltage load disconnecting switch + fuse
|
1
|
|
type |
Air insulated |
|
|
nominal voltage |
15kV |
|
|
Rated power frequency withstand voltage |
42 kV |
|
|
Rated lightning impulse withstand voltage |
75 kV |
|
|
rated current |
630 A |
|
|
Fuse rated voltage |
12kV |
|
|
Fuse rated Solution current |
40,100,125 |
|
|
3 |
Low Voltage compartment |
|
|
Size of cubicle |
||
|
protection class |
IP 23 |
|
|
Main ACB (Air circuit breaker) |
||
|
Nominal voltage |
400 V |
|
|
Rated frequency |
50 /60 Hz |
|
|
Power frequency withstand voltage, kV (RMS) |
3 for one minute |
|
|
rated lightning impulse withstand voltage, kV(Peak)( 1.2 /50 ms) |
||
|
rated current (Amp) |
2500 |
|
|
rated short-time current rating |
50 KA |
|
|
3.1 |
MCCB /ACB |
|
|
Nominal voltage |
0.4 KV |
|
|
Rated current |
2500 A |
|
|
Rated short-time current rating |
50 KA |
|
|
3.2 |
Current Transformer ( CT) |
|
|
QTY for each s/s |
3 |
|
|
voltage rating |
380V |
|
|
current transformer ratio |
2500 /5 A |
|
|
Frequency |
50 /60 Hz |
|
|
Burden |
15 VA |
|
|
Class |
1 |
|
|
3.3 |
Ammeter |
|
|
qty |
3 |
|
|
current range |
0 -2500 A |
|
|
3.4 |
Voltmeter with selector switch |
1 |
|
voltage range |
0 -500 V |
|
|
4 |
Transformer backpack |
|
|
protection class |
IP 23 |
|
|
Technical characteristics of the distribution transformer |
||
|
cooling method |
Air cooling |
|
|
NO. OF phase |
3 |
|
|
standard |
IEC 60076 |
|
|
Frequency |
50 /60 Hz |
|
|
rated continuous power on HV & LV side |
2500 KVA (depends on the requirements of the client) |
|
|
Rated voltage on HV side |
15 KV( suitable in 10 , 11, 13.8, 20, 24, 30, 33 , 35 ,36 ) |
|
|
Rated voltage on LV side |
0.4 KV |
|
|
Vector group |
Dyn5 ( or Dyn11..etc) |
|
|
No-load loss at rated voltage and frequency |
≤ 0. 95 KW |
|
|
Full load loss , KW |
≤ 11.0 |
|
|
Color of the transformer |
gray |
|
|
Thickness of surface treatment (µm) |
140 |
|
|
Ability to withstand unbalanced load |
≥ 90 % |
|
|
Average temperature rise , windings /top oil |
60 /55 |
|
|
windings material |
100% copper |
|
Structural drawing
The feature
1. Strong overload capacity, allowing overload 2 times 2 hours, overload 1.6 times 7 hours without affecting the variable life of the box.
2.Adopt elbow type plug connector, can be very convenient to connect the high-voltage incoming cable, and can be used as load switch in emergency, can be charged plug.
3.Adopt double fuse protection, insert fuse is short circuit fault of double sensitive fuse (temperature, current) protection box.
4.Backup Current Limiting Protection Fuses (ELSP) are used to protect the high voltage side when a fault occurs inside the protection box.
5.Transformers generally use high ignition point oil.
6.All components used for high voltage load switch protection, such as fuse, transformer core and winding, are placed in the same oil tank
