Bussmann 12TDLEJ63 transformer protection fuse

Bussmann 12TDLEJ63 DIN Dimensioned IEC Fuse,ABPower_A bussmann fuse world.    

Fuse Application:

Transformer Protection

fuse rating:

12KV,63amp; 

fuse type:

DIN medium voltage fuse. 

Fuse cross reference: 

Cooper Xian fusegear, SDLDJ-12kV/63A.

Fuse size:

Current limiting fuse Caution

To ensure proper application of Bussmann current limiting fuse, it’s important that following additional rules be applied.

1, Current limiting fuse produce arc voltages that exceed the system voltage.

 Care must be taken to make sure that the peak voltage does not exceed the insulation level of the system. If the fuse voltage rating is not permitted to exceed 140% of the system voltage, there should not be a problem. This does not mean that a higher rated fuse cannot be used, but points out that one must be assured that the system insulation level (BIL) will handle the peak arc voltage produced.

2, As with the expulsion fuse, Bussmann current-limiting fuses must be properly coordinated with other protective devices on the system. For this to happen the rules for applying an expulsion fuse must be used at all currents that cause the fuse to interrupt in 0.01 seconds or greater.

When other current-limiting protective devices are on the system it becomes necessary to use I2t values for coordination at currents causing the fuse to interrupt in less than 0.01 seconds. These values may be supplied as minimum and maximum values or minimum melting and total clearing I2t curves. In either case, the following rules should be followed.

1, The minimum melting I2t of the fuse should be greater than the total clearing I2t of the downstream current-limiting device.

2, The total clearing I2t of the fuse should be less than the minimum melting I2t of the upstream current- limiting device.

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