Pad mounted transformer

US-style

Catalogue

7.2kV up to 36kV

2004/3

Wenzhou Rockwill Electric Co.,Ltd.

Best solution for your power!

++++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

++++ 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

++++ 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

++++ 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

++++ 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

++++ 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

++++ 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.

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