compact transformer substation, pad mounted transformer. from 3.3kV up to 34.5kV. 10kVA up to 5000kVA.

1. Pad mounted transformer
US-style
Catalogue
7.2kV up to 36kV
2004/3
Wenzhou Rockwill Electric Co.,Ltd.
Best solution for your power!

2. ++++General
YB()series pad mounted transformer is suitable for 7.2kV up to 36kV ring power supply and
terminal power supply system as HV distribution calculation and protection equipment. In the
substation except transformer there are 4 load switches, two-position load switch, protection fuse
and plug-in fuse in the HV side.
We can install control electrical,
distribution electrical,
compensation electrical and
meters. This substation can use
indoor or outdoor.
++++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 /0.4() 0.4()
Rated current A 630 3/75-75/1875() Less than 4000
Frequency Hz 50
Rated Capacity kVA 50-1250()()
Pfr withstand kV 42/50/70 2.5
BIL kV 75/125/170
Crust Protection Grade IP23 Omni seal IP33
Noisy Grade dB Oil type less than 55
Appearance Dimensions mm According to primacy wiring circuit schema
Inner view of transformer

3. ++++ Structure Characteristics
l The box structure of this product is divided into two parts. In front is HV and LV operation
room. In the HV room including HV terminals, load switch, off-load switchgear, plug-in fuse,
pressure relief valve, thermometer, oil level indicator and oil drain valve. In LV room
including LV terminals. In the back sector are oil tank and radiator, and transformer winding
and iron, load switch and protection fuse are in the oil tank..
l Color can be made by client's requirements
++++ Foundation Drawing of Pre-Fabricated Substation
++++ Each different outside coating style for client options.
A type steel sheet B type steel sheet S type AL alloy H type steel shee

4. ++++ Main Primacy Wiring Circuit Schemas
HV circuit schemas
Schema
No.
1 2 3 4
Primacy
circuit
schemas
Rated
current
630A
Main
switch
F11-12RD
CT / l
VT / l
Fuse l
Arrester l
Voltage
indicator
l
ES l
Note: we offer special customized products according to client’s requirement.
l mean with. / mean without.
LV circuit schemas
Schema
No.
1 2
wiring
schemas

5. ++++ Main Primacy Wiring Circuit Schemas
LV circuit schemas
Schema
No.
3 4
wiring
schemas
LV circuit schemas
Schema
No.
5 6
wiring
schemas
LV circuit schemas
Schema
No.
7 8
wiring
schemas

6. ++++ Main Primacy Wiring Circuit Schemas
LV circuit schemas
Schema
No.
9 10
wiring
schemas
LV circuit schemas
Schema
No.
11 12
wiring
schemas
LV circuit schemas
Schema
No.
13 14
wiring
schemas

7. ++++ Main Primacy Wiring Circuit Schemas
LV circuit schemas
Schema
No.
15 16
wiring
schemas
++++ Typical wiring scheme of pre-fabricated substation (Standard)
HV circuit schemas
Schema
No.
1 2 3
wiring
schemas
Current 100A-300A-600A 300A-600A 300A-600A
Function Incoming Ring incoming Two side power incoming
LV circuit schemas
Schema
No.
1-1 2-2 3-3
wiring
schemas
Current (60-225A)×12 (400-600A)×6 (60-225A)×9+(400-600A)×1
Function General M +12 feeder General M +6 feeder General M +10 feeder

8. ++++ Typical LV wiring scheme of pre-fabricated substation (US)
Normal type schemas
Schema
No.
1 2 3
wiring
schemas
Current 60~225A 160~630A 60~225A
Function General M +4feeder General M +5 feeder General M +6feeder
Additional functions schemas
Schema
No.
4 5 6
wiring
schemas
General
circuit
630~2000A 630~2000A 630~2000A
Sub
circuit
60~225A 60~400A 60~225A
General
switch
S(D)K controller with default phase protection
Function General M +4feeder General M +5 feeder General M +6feeder
++++Ordering Instructions
l Primacy wiring circuit schema for confirmation
l Other special requirements.
Http：//www.rockwill.cn E-mail：rockwill.sale@gmail.com