这是CSA C301的第二版。1、单相潜水配电变压器。它取代了1976年出版的第一版。1本标准涵盖了额定值为25至333 kV的单相潜水变压器的特点。A.注:对于本文未涵盖的细节，应参考CSA C2。1.1.2本标准仅适用于单相配电变压器装置，该装置拟用于地面以下的通风拱顶或外壳中，所有终端和附件均已安装或接近安装，以便在地面以上运行。它不适用于（a）与地面接触的直埋变压器；（b） 永久浸入式变压器；或（c）网络型变压器。 1.3本标准涵盖的变压器仅适用于电力公司在一次电压高达16.0/27.6 kV（含16.0/27.6 kV）且接地Y的有效接地地下配电系统上运行。注:非电力公司按照本标准运行变压器时，可能需要遵守电气检查的附加要求有管辖权的当局。1.4本标准涵盖的设备通常具有双高压套管，设计用于变压器箱内的电路回路馈电。通常连接在该内部回路馈电元件和变压器高压绕组之间的高压熔断器保护不在本标准范围内，且由买方指定。 1.5在CSA标准中，“应”用于表示要求，即用户有义务满足的条款，以符合标准；“应该”用于表示建议或建议但不需要的建议；“可”用于表示一种选择或在标准范围内允许的选择；“can”用来表示可能性或能力。注释随附条款不包括要求或替代要求；随附条款的注释的目的是将解释性或信息性材料与文本分开。表和图的注释被视为表或图的一部分，可以作为要求编写。附件被指定为规范性（强制性）或信息性（非强制性）- 必须）定义其应用程序。

This is the second edition of CSA C301.1, Single-phase submersible distribution transformers.It supersedes the first edition, published in 1976.1 Scope1.1 This Standard covers the features of single-phase submersible transformers rated 25 to 333 kV.A. Note: For details not covered herein, reference should be made to CSA C2.1.1.2 This Standard applies only to single-phase distribution transformer units intended for use in a ventilated vault or enclosure below grade level, with all terminations and accessories cover mounted, or nearly so, for operation above grade. It does not apply to (a) directly buried transformers in contact with the earth; (b) permanently submerged transformers; or (c) network-type transformers.1.3 The transformers covered by this Standard are intended only for operation by electrical utilities on effectively grounded underground distribution systems having primary voltages up to and including 16.0/27.6 kV grounded Y. Note: The operation of transformers complying with this Standard by other than an electric utility may be subject to additional requirements by the electrical inspection authority having jurisdiction.1.4 The equipment covered by this Standard typically has dual high-voltage bushings designed for circuit loop feed within the transformer tank. High-voltage fuse protection normally connected between this internal loop feed element and the transformer high-voltage winding is not covered by this Standard and specified by the purchaser.1.5 In CSA Standards, "shall" is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the standard; "should" is used to express a recommendation or that which is advised but not required; "may" is used to express an option or that which is permissible within the limits of the standard; and "can" is used to express possibility or capability. Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material. Notes to tables and figures are considered part of the table or figure and may be written as requirements. Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application.