Draft Details
- Single-Phase And Three-Phase Liquid-Filled Dis...
- DRAFT STANDARD
- Legal Notice for Draft Standards
- Preface
- CAN/CSA-C2.1
- + 1 Scope
- 1.1
- 1.2
- 1.3
- 1.4
- 1.5
- 2 Reference publications
- 3 Definitions
- + 4 Electrical characteristics
- + 4.1 kVA ratings
- 4.1.1 Single‑phase transformers
- 4.1.2 Three‑phase transformers
- + 4.2 Temperature rise
- 4.2.1
- 4.2.2
- + 4.3 Loading capabilities
- 4.3.1
- 4.3.2
- + 4.4 Off‑circuit voltage taps
- 4.4.1
- 4.4.2
- 4.5 Rated voltages
- 4.6 Operating voltage range
- 4.7 Radio interference
- 4.8 Audible sound level
- + 4.9 Short‑circuit capabilities
- 4.9.1 Transformers with secondary voltages of 6...
- 4.9.2 Transformers with impedance greater than ...
- + 4.10 Impedance
- + 4.10.1 Transformers with secondary voltages of ...
- 4.10.1.1
- 4.10.1.2
- 4.10.1.3
- 4.10.2 Transformers with secondary voltage of 2...
- 4.11 Energy efficiency
- + 5 Electrical connection and designation
- + 5.1 Voltage Designation
- 5.1.1 Polarity
- 5.1.2 Angular displacement
- 5.1.3 Core to tank bonding
- 5.1.4 Standard high‑voltage winding connection
- 5.1.5 Low‑voltage winding connection for 120/24...
- 5.1.6 GrdY‑GrdY connected transformers
- + 5.2 Grounding and bonding
- 5.2.1 Tank grounding, pole‑mounted transformers...
- 5.2.2 Tank grounding, transformers other than p...
- + 5.2.3 Low‑voltage system bonding strap
- 5.2.3.1
- 5.2.3.2
- 5.2.3.3
- + 6 Bushings, terminals and connectors
- + 6.1 Bushings, general
- 6.1.1 Bushings electrical characteristics
- + 6.2 Terminals and connectors, general
- 6.2.1
- 6.2.2
- 6.2.3
- 6.2.4
- 6.2.5
- + 6.3 Terminals and bushing location, single‑phas...
- + 6.3.1 High‑voltage terminals and bushings
- 6.3.1.1 Location
- 6.3.1.2
- 6.3.1.3 Polemounted 167kVA and below
- 6.3.1.4 Non-Polemounted or pole/platform mounte...
- 6.3.1.5
- 6.3.1.6
- + 6.3.2 Low‑voltage terminals and bushings
- 6.3.2.1 Location
- 6.3.2.2 Low voltage 120/240 V
- 6.3.2.3 Low voltage other than 120/240 V or 240...
- 6.3.2.4 Series‑parallel connections, for transf...
- 6.3.2.5 Series-parallel connections, for transf...
- 6.3.2.6 Polymer Bushings
- + 6.4 Terminals, three‑phase transformers
- 6.4.1 Arrangement and location
- + 6.4.2 Neutral terminal of three‑phase transform...
- 6.4.2.1
- 6.4.2.2
- 6.4.2.3
- 6.5 External clearances
- + 7 Off‑circuit tap changer and dual-voltage sele...
- 7.1 Type and tap designation
- 7.2 Location
- + 8 Mechanical characteristics
- 8.1 Construction
- 8.2 Tank operating pressure
- 8.3 Pressure relief
- 8.4 Floor installation
- 8.5 Pole mounting
- 8.6 Lifting
- 8.7 Gaskets
- 8.8 Space below secondary bushings
- + 8.9 Liquid insulant
- 8.9.1 Nature
- 8.9.2 Oil specification
- 8.9.3 Liquid level
- + 8.10 Exterior finish
- 8.10.1 Finish performance
- 8.10.2 Colour
- + 8.11 Hardware
- 8.11.1 General
- 8.11.2 Threaded receptacles for stainless steel...
- 8.13 Welding
- 8.14 Tolerances
- 8.15 Handhole
- 8.16 Accessories
- + 9 Tests
- 9.1 General
- + 9.2 Routine tests
- 9.2.1 Standard routine tests
- 9.2.2 Optional routine tests
- 9.2.3 Reports and documentation for routine tes...
- + 9.3 Tolerances for routine tests
- 9.3.1 Ratio
- + 9.3.2 Losses and exciting current
- 9.3.2.1 Losses
- 9.3.2.2 Individual transformers
- 9.3.2.3 Average for two or more transformers
- + 9.3.3 Tolerances for impedance
- 9.3.3.1 Guarantee
- 9.3.3.2 Nameplate
- + 9.4 Type tests
- 9.4.1 General
- 9.4.2 Standard type tests
- 9.4.3 Optional type tests
- 9.4.4 Reports and documentation for type tests
- + 9.5 Dielectric tests
- 9.5.1 Applied voltage test
- 9.5.2 Induced voltage test
- 9.5.3 Single‑phase transformers with one high‑v...
- 9.5.4 Three‑phase transformers, permanently gro...
- 9.5.5 Impulse strength tests
- + 9.6 Temperature rise test
- 9.6.1 Method
- 9.6.2 Ambient temperature
- 9.7 Short‑circuit tests
- 9.8 Transformer enclosure fault current capabil...
- + 9.9 Mounting bracket tests
- 9.9.1 Vertical loading
- 9.9.2 Horizontal loading
- + 10 Markings
- 10.1 Label materials
- + 10.2 Nameplate and connection diagram
- 10.2.1 Combination nameplate
- 10.2.2 Location
- 10.2.3 Information on nameplate
- 10.2.4 Information Plate
- + 10.3 Warning labels
- 10.3.1 Welded cover
- 10.3.2 Off‑circuit switches
- + 10.4 Tank markings
- 10.4.1 Information on exterior of the tank
- 10.4.2 Selector switches
- 10.4.3 Off‑circuit tap changer
- 10.4.4 Non‑PCB sticker
- 10.4.5 Information on the inside of the transfo...
- 10.4.6 Liquid Insulant Type Label
- 11 Optional items
- + 12 Quality assurance
- Table 1
- Table 2
- Table 3
- Table 4
- Table 4 (Concluded)
- Table 5
- Table 6
- Table 7
- Table 8
- Table 9
- Table 10
- Table 11
- Table 12
- Table 13
- Table 14
- Table 15
- Table 16
- Figure 1
- Figure 2
- Figure 3(a)
- Figure 3(b)
- Figure 4(a)
- Figure 4(b)
- Figure 5
- Figure 6(a)
- Figure 6(b)
- Figure 7(a)
- Figure 7(b)
- Figure 8
- Figure 9
- Figure 10(a)
- Figure 10(b)
- Figure 11
- Figure 12(a)
- Figure 12(b)
- Figure 13
- + Annex A (informative)
- A.1 General
- A.2 Test conditions:
- A.3 Test Procedures
- + Annex B (normative)
- B.1 Purpose
- B.1 Material
- + B.1 Location
- B.1.1
- B.1.2
- Figure B.1
- Figure B.2
1.1
This Standard specifies the requirements for distribution transformers with the exception of those distribution transformers that are covered by CSA C2.2, C227.3, and C227.4.
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
1.2
This Standard applies to single‑ and three‑phase, 60 Hz, liquid‑filled distribution transformers rated at 1000 kVA or below for single phase and at 3000 kVA or below for three phase, up to 34.5 kV system nominal voltage.
1.3
This Standard includes voltage ratings, kVA ratings, certain mechanical characteristics, and test procedures. Also included are 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 also applies to self‑protected transformers, with the exception of the protective equipment.
1.5
Except as specified by other CSA Standards, this Standard does not apply to auto‑, testing, dry‑type, welding, furnace, rectifier, network, or subway type transformers, or special‑purpose transformers, or to step‑voltage regulators.
You may comment on any section of this document by clicking the “Submit Comment” link at the bottom of the relevant section.