这是CSA C227的第四版。3、带可分离绝缘高压连接器的薄型、单相、垫装式配电变压器。在1991年出版的之前版本中， 1979年和1974年1月1日。1. 本标准规定了带有可分离绝缘高压连接器且主要用于电力设施运行的单相、垫装式配电变压器的要求。 注:非电力公司按照本标准操作变压器时，可能会受到具有管辖权的电气检查机构的附加要求的约束。 1.2 本标准适用于单相、垫装、60 Hz、充液配电变压器，其带有可分离绝缘高压连接器，设计用于在有效接地的Y形系统上运行，额定电压为167 kV。A或以下，绝缘等级为18 kV或以下，适合安装在户外无需额外防护外壳的垫板上。1.3 本标准包括额定电压，kV。A额定值、某些机械特性和试验程序。该标准还包括以下性能特征:能效（符合CAN/CSA-C802.1）、温升、负载能力、声级和无线电影响电压（RIV）。 1.4 本标准涵盖的设备主要用于有效接地的地下配电系统，其首选额定电压如表1所示，二次配电电压为240/120 V，三线制。1.5 本标准旨在允许相同基本物理尺寸、但由不同制造商制造的焊盘安装单元之间的互换性，而无需修改电缆或焊盘。本标准涵盖回路馈电系统的端子布置，包括某些最小尺寸和某些特定尺寸，但不确保一个制造商的电缆入口隔间。 s的变压器与另一个变压器匹配。1.6 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。附注随附条款 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附件 （强制性）或信息性（非强制性）来定义其应用。

This is the fourth edition of CSA C227.3, Low-profile, single-phase, pad-mounted distribution transformers with separable insulated high-voltage connectors.It supersedes the previous editions published in 1991, 1979, and 1974.1 Scope1.1 This Standard specifies the requirements for single-phase, pad-mounted distribution transformers with separable insulated high-voltage connectors and intended primarily for operation by electric utilities. Note: The operation of transformers complying with this Standard by other than an electric utility can be subject to additional requirements by the electrical inspection authority having jurisdiction.1.2 This Standard applies to single-phase, pad-mounted, 60 Hz, liquid-filled distribution transformers with separable insulated high-voltage connectors designed for operating on an effectively grounded wye system, rated at 167 kV.A or less, with an insulation class of 18 kV or less, and suitable for mounting outdoors on pads without additional protective enclosures.1.3 This Standard includes voltage ratings, kV.A ratings, certain mechanical characteristics, and test procedures. The Standard also includes the following performance characteristics: energy efficiency (in accordance with CAN/CSA-C802.1), temperature rise, loading capabilities, sound level, and radio influence voltage (RIV).1.4 This Standard covers equipment intended primarily for operation on effectively grounded underground distribution systems having preferred rated voltages as shown in Table 1 and a secondary distribution voltage of 240/120 V, three-wire.1.5 This Standard is intended to allow for interchangeability between pad-mounted units of the same basic physical size but made by different manufacturers, without modifying the cables or the pad. This Standard covers terminal arrangements for a loop-feed system, including certain minimum dimensions and certain specific dimensions, but does not ensure that the cable entrance compartment of one manufacturer.s transformer matches that of another.1.6 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.