CAN CSA C802.1-13 (2022) PDF

Full title and description

CAN/CSA‑C802.1‑13 (R2022) — Minimum efficiency values for liquid‑filled distribution transformers. This document provides minimum energy‑efficiency values, guidance on the Total Ownership Cost (TOC) methodology for utilities, and procedures for applying efficiency modifications for single‑phase and three‑phase, 60 Hz liquid‑filled distribution transformers.

Abstract

This standard specifies minimum efficiency requirements and related test/procedural guidance for liquid‑filled distribution transformers commonly used by electric utilities and other users. It promotes selection based on lifecycle (TOC) considerations and provides tabulated minimum efficiency values, modification rules for special features, and test method references. The R2022 entry is a reaffirmation/reissue of the CAN/CSA C802.1 series prior to the 2023 edition.

General information

• Status: Reaffirmed as CAN/CSA‑C802.1‑13 (R2022); later superseded by CSA C802.1:23 (third edition).
• Publication date: Issued/reaffirmed in 2022 (listed as 01‑Jan‑2022 for the R2022 entry).
• Publisher: CSA Group / Canadian Standards Association (CSA).
• ICS / categories: Electrical engineering — transformers; energy efficiency and performance standards for distribution transformers (industry classification: power/transformer standards).
• Edition / version: CAN/CSA‑C802.1‑13 with R2022 reaffirmation (commonly cited as CAN/CSA‑C802.1‑13 (R2022)).
• Number of pages: Original 2013 edition listed as 17 pages; the later CSA C802.1:23 edition is 23 pages. (R2022 is a reaffirmation of the C802.1‑13 material prior to the 2023 third edition.)

Scope

The standard applies to single‑phase and three‑phase, 60 Hz liquid‑filled distribution transformers (typical kVA ranges: single‑phase ~10–833 kVA; three‑phase ~15–3000 kVA; insulation class 34.5 kV and below; low‑voltage windings ≤600 V as applicable). It defines minimum energy‑efficiency values, explains the application of TOC methodology for utilities, and describes allowable efficiency modifications for special features. Exclusions include autotransformers, testing/welding/furnace/rectifier/network/grounding transformers and other special‑purpose units, plus transformers with frequencies other than 60 Hz or extreme tap ranges.

Key topics and requirements

• Minimum individual efficiency values for liquid‑filled distribution transformers (tabulated by kVA/rating and configuration).
• Total Ownership Cost (TOC) methodology guidance for electric utilities to select transformers based on lifecycle cost, including loss valuation multipliers and loss evaluation formula.
• Procedures for adjusting efficiency values to account for special electrical features (impedance ranges, special core/coil designs, tap ranges, etc.).
• Test methods and procedures referenced for determining no‑load and load losses and calculating efficiencies.
• Marking and information requirements to support conformity assessment and procurement decisions.

Typical use and users

Used by electric utilities, transformer manufacturers, procurement/specification engineers, regulatory bodies, and testing laboratories. The standard supports utility procurement policies, manufacturer design/marketing for energy‑efficient distribution transformers, and compliance testing for minimum efficiency claims.

Related standards

Commonly cited or used alongside: CAN/CSA C802.2 and C802.3 (other transformer efficiency and power transformer guidance), CSA C2.1 / C2.2 series for distribution transformer product requirements, CSA C227.x series for pad‑mounted transformer construction and related CSA/IEEE test methods (and relevant IEEE test codes such as IEEE C57.12 and C57.12.90 where referenced).

Keywords

liquid‑filled distribution transformer; minimum efficiency; energy efficiency; Total Ownership Cost (TOC); transformer losses; no‑load loss; load loss; CSA; CAN/CSA‑C802.1‑13; R2022.

FAQ

Q: What is this standard?

A: It is CAN/CSA‑C802.1‑13 (R2022), the CSA Group standard that sets minimum efficiency values and guidance for liquid‑filled distribution transformers, including TOC methodology for utilities.

Q: What does it cover?

A: Minimum energy‑efficiency values for single‑ and three‑phase liquid‑filled distribution transformers, associated test/procedure references, rules for efficiency modification for special features, and guidance on lifecycle cost assessment (TOC). It specifies the transformers to which the values apply and lists exclusions.

Q: Who typically uses it?

A: Electric utility planners and procurement teams, transformer designers and manufacturers, test laboratories, energy program administrators, and procurement/specification engineers working on distribution transformer selection and compliance.

Q: Is it current or superseded?

A: The CAN/CSA‑C802.1‑13 (R2022) entry was a reaffirmation of the C802.1 series; it was subsequently superseded by the third edition published as CSA C802.1:23 (published December 1, 2023). Users specifying or complying with minimum efficiencies should refer to the latest CSA C802.1:23 edition for the most up‑to‑date values and harmonization notes.

Q: Is it part of a series?

A: Yes — C802.1 is part of the CSA transformer efficiency series (C802.x) and is related to other CSA product and test standards for distribution transformers (for construction, testing and installation), including C802.2/C802.3 and the CSA C227 and C2 series.

Q: What are the key keywords?

A: transformer efficiency, liquid‑filled, distribution transformer, minimum efficiency values, TOC, losses, CSA, CAN/CSA‑C802.1, R2022.