2 sentences

1. 电流过大导致保险丝熔断了。

   diàn​liú guò dà dǎo​zhì bǎo​xiǎn​sī róng duàn le.

   The excessive current caused the fuse to blow.

   Source: Dong Chinese Dictionary

2. 如果电流过大，保险丝就会自动熔断以保护电路。

   rú​guǒ diàn​liú guò dà, bǎo​xiǎn​sī jiù huì zì​dòng róng duàn yǐ bǎo​hù diàn​lù.

   If the current is too high, the fuse will automatically blow to protect the circuit.

   Source: Dong Chinese Dictionary