T.W. Generators Limited

Used transformers

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Used transformers for sale and wanted

Make
kVA
HV
LV
Cooling class
Build date
Guide Price
South Wales Switchgear
 
(step-up transformer)
500
1130/565

433

ONAN
1980
 
In stock
Brush Transformers Limited
800
11000
433
ONAN
1987
  In stock

800kVABrushTransformer.JPG
800kVA Brush transformer

Transformer cooling class letter description

Letter

 Letter position

Description

O

1st Letter

(Internal cooling medium) 

Liquid with flash point less than or equal to 300 degrees Centigrade

K

1st Letter

(Internal cooling medium)

Liquid with flash point greater than 300 degrees Centigrade

L

1st Letter

(Internal cooling medium

Liquid with no measurable flash point

N

2nd Letter

(Internal cooling mechanism) 

Natural convection through cooling equipment and windings

 F

2nd Letter

(Internal cooling mechanism) 

Forced circulation through cooling equipment, natural convection in windings

 D

2nd Letter

(Internal cooling mechanism) 

Forced circulation through cooling equipment, directed flow in windings

 A

3rd Letter

(external cooling medium) 

Air

 W

3rd Letter

(external cooling medium) 

Water

 N

4th Letter

(external cooling medium) 

Natural convection

 F

4th Letter

(external cooling medium) 

Forced circulation

Please contact us if you require further details of the used stock transformer.  We also purchase used transformers and associated electrical equipment

Building 12, Marsworth Airfield South Site, Long Marston Road, Marsworth, TRING, Herts, England, HP23 4FE