British Standard dimensioned IEC fuses for motor circuit protection,
Medium Voltage Fuses and Fuse Links
British Standard dimensioned IEC fuses for motor circuit protection
British IEC Fuses
Specifications
Decription:
The Cooper Bussmann range of motor fuses are designed to meet the specific requirements necessary for motor protection.
Note:
During the starting cycle of direct on-line motors, the fuse elements will reach a considerably higher
temperature than during normal operation; (this is due to the high amount of current the motor will draw as it starts,
typically, 6 times its normal load current value). This results in expansion and contraction of the fuse elements and could cause premature operation of the fuse.
Cooper Bussmann motor fuses encompass an advanced design to minimize this effect. This therefore, negates the need to over specify the fuse rating due to high values of motor starting current.
Cooper Bussmann motor fuses operate extremely quickly under heavy fault currents, resulting from the time / current characteristic. Low power dissipation ensures low
temperature rise, important in multi-tier starters for example. Switching (Arc), voltages are lower than permitted values, therefore, 5.5kV fuses are also suitable for 4.8kV and
2.4kV circuits.
temperature than during normal operation; (this is due to the high amount of current the motor will draw as it starts,
typically, 6 times its normal load current value). This results in expansion and contraction of the fuse elements and could cause premature operation of the fuse.
Cooper Bussmann motor fuses encompass an advanced design to minimize this effect. This therefore, negates the need to over specify the fuse rating due to high values of motor starting current.
Cooper Bussmann motor fuses operate extremely quickly under heavy fault currents, resulting from the time / current characteristic. Low power dissipation ensures low
temperature rise, important in multi-tier starters for example. Switching (Arc), voltages are lower than permitted values, therefore, 5.5kV fuses are also suitable for 4.8kV and
2.4kV circuits.
Build-A-Code:
| Catalog Number Build-A-Code | ||
| kV | Basic Catalog Number | Amps |
| _ _ _ | _ _ _ _ _ | _ _ _ |
| Catalog Number | Volts | Breaking Capacity | Amp Ratings | Length | Diameter | Dimensional Standard |
| WJON6 | 3.6kV | 50kA | 5, 6.3, 10, 16, 20, 25, 31.5, 40, 50 |
7.56 (192) | 1.4 (35.6) | |
| WDOH6 | 3.6kV | 50kA | 50, 63, 80, 100, 125 | 7.56 (192) | 2 (50.8) | BS 2692 (TA1) or DIN 43625 |
| WFOH6 | 3.6kV | 50kA | 160, 200 | 11.5 (292.1) | 3 (76.2) | BS 2692 (TA1) or DIN 43625 |
| WDLSJ | 3.6kV | 50kA | 50, 63, 80, 100, 125 | 11.5 (292.1) | 2 (50.8) | DIN 43625 |
| WFLSJ | 3.6kV | 50kA | 160, 200 | 11.5 (292.1) | 3 (76.2) | DIN 43625 |
| WDFHO | 3.6kV | 50kA | 50, 63, 80, 100, 125 | 10 (254) | 2 (51mm) | BS 2692 (TA2) |
| WFFHO | 3.6kV | 50kA | 160, 200 | 10 (254) | 3 (76.2) | BS 2692 (TA2) |
| WKFHO | 3.6kV | 50kA | 250, 315, 355, 400 | 10 (254) | 3 (76.2) | BS 2692 (TA2) |
| VFNHA | 5.5kV | 60kA | 2R-6R | 15.86 (402.8) | 3 (76.2) | N. American Practice |
| VKNHA | 5.5kV | 60kA | 9R-24R | 15.86 (402.8) | 3 (76.2) | N. American Practice |
| WFNHO | 7.2kV | 40kA | 25, 31.5, 40, 50, 63, 80, 100, 125, 160 |
15.86 (402.8) | 3 (76.2) | |
| WKNHO | 7.2kV | 40kA | 200, 224, 250, 315 | 15.86 (402.8) | 3 (76.2) | BS 2692 (TA4) |
| WFMSJ | 7.2kV | 40kA | 25, 31.5, 40, 50, 63, 80, 125, 160 |
17.40 (442) | 3 (76.2) | DIN 43625 |
| WKMSJ | 7.2kV | 40kA | 200, 224, 250, 315, 355 | 17.40 (442) | 3 (76.2) | DIN 43625 |
