4　Installation of Power Transformer

4.1　Dominant Items

4.1.1　The neutral point and transformer cabinet，frame or case of dry-type transformer shall be grounded according to design requirements of low-voltage distribution system.The connection shall be proper and reliable，and the ground resistance shall be in accordance with design requirements.

4.1.2　The transformers operating in parallel must satisfy the requirements for parallel operation.

4.1.3　The transformers shall pass the commissioning test in accordance with the requirements specified in Article 2.1.5 of this code.