Three different types of power supplies (transformers) are:
- Stationary or portable, single-phase or polyphase, air-cooled (natural or forced) isolating and safety isolating transformers.
- Stationary or portable, single-phase or polyphase, air-cooled (natural or forced) separating transformers, auto-transformers, variable transformers and small reactors.
- Power supply units
Prior to being offered for sale in New Zealand, a Power Supply or Charger that are within the following definitions are subject to a Supplier Declaration of Conformity.
An electrical device which—
- provides an output not exceeding 50V ac or 120V ripple free dc; and
- is a type to provide supply to separate luminaires; or
- is a household type for either charging batteries or to provide a supply to separate equipment.
Class 0 and 01 appliances are not permitted in New Zealand.
Power supply or charger must comply with either:
- The following Standards listed under Schedule 4 of the Electricity (Safety) Regulations 2010:
- ‘Household and similar electrical appliances’ (Battery Chargers); and
- ‘Audio and Video Products’; and
- ‘Information technology equipment’; and
- ‘Power transformers, power supplies, reactors and similar products’.
- AS/NZS 3820:2009 Essential safety requirements for electrical equipment
- The Conformity Co-operation Agreement (China – NZ).