|
|
|
.png)
Temperature measurements should be taken at the top center of the enclosure. This can be done with a thermo couple type device or a simple bulb type thermometer held down to the surface with a piece of clay.
All ventilation openings should be clear and the distance from the wall as stated on the nameplate must be maintained. The table below indicates the maximum enclosure temperature allowed. See the trouble shooting guide for additional information.
|
Ventilated Design with 220* C Insulation System |
|||
|
Winding Temp. |
Enclosure |
Maximum |
|
|
Rise By |
Temperature |
Maximum |
Enclosure |
|
Resistance |
Rise |
Ambient* |
Temp. |
|
*C *F |
*C *F |
*C *F |
*C *F |
|
80 (B) 176* |
35* 95* |
40* 104* |
75* 167* |
|
115 (F) 239* |
45* 113* |
40* 104* |
85* 185* |
|
150 (H) 302* |
50* 122* |
40* 104* |
90* 194* |
|
Encapsulated Design with 180*C or 105*C Insulation System |
|||
|
115 (F) 239* |
65* 113* |
25* 77* |
90* 194* |
|
55 (A) 131* |
65* 149* |
25* 77* |
90* 194* |
*Ambient of 25* C specified by UL 506 for enclosed transformers.
Ambient of 40* C specified by UL 506 for industrial control transformers.
