Historical
CSA C22.2 No. 281.1-2012
Standard for safety for personnel protection systems for electric vehicle (EV) supply circuits: General requirements (Tri-national standard, with UL 2231-1 and NMX-J-668/1-ANCE)
Preface
This is the harmonized ANCE, CSA Group, and UL Standard for Personnel Protection Systems for Electric Vehicle (EV) Supply Circuits: General Requirements. It is the First edition of NMX-J-668/1-ANCE, the First edition of CSA C22.2 No. 281.1, and the Second edition of UL 2231-1. This edition of UL 2231-1 supersedes the previous edition published in 2002.Scope
1.1 These requirements cover devices and systems intended for use in accordance with Annex A, Ref. No. 1, to reduce the risk of electric shock to the user from accessible parts, in grounded or isolated circuits for charging electric vehicles. These circuits are external to or on board the vehicle. 1.2 The devices and systems covered by these requirements are compatible with the designs of charging systems and vehicles where use is intended and are rated accordingly. To assure compatibility, the charging system, the vehicle, or both, are in accordance with the features contained in 1.3 - 1.5. 1.3 The type of vehicle covered by these requirements, including all accessible conductive parts on the vehicle, has one or more of the following:- Provision for the connection of an equipment grounding conductor during battery charging, unless the vehicle has a system of reinforced or double insulation or all of the circuitry on the vehicle is electrically isolated from the supply circuit,
- Provision for the connection of ground-monitoring conductors, where required,
- Reinforced insulation, or is double-insulated from the supply circuit, or
- No direct connection between current-carrying conductors and the vehicle chassis.
- A fault current to ground exceeds some predetermined value that is less than that required to operate the overcurrent protective device of the supply circuit,
- The grounding path becomes open-circuited or becomes an excessively high impedance, or
- A path to ground is detected on an isolated (ungrounded) system.
- Either end-grounded or centrally grounded when the operating voltage is 150 Vrms or less,
- Centrally grounded when the operating voltage is greater than 150 Vrms, or
- Isolated (ungrounded).
- The type of current (60 Hz AC, DC, a combination of AC and DC, or AC at frequencies greater than 60 Hz) present in the circuit to be protected, and
- Voltage.
Content Provider
CSA America, Inc. [csa]