Page 9 - Evolution Distributionboard Technical Catalogue

ALL ABOUT AS/NZS 61439

MAIN CHANGES IN THE NEW AS/NZS 61439 STANDARDS

1. The concept of Type Tested Assemblies (TTA) and Partially Type Tested
Assemblies (PTTA) has been replaced with Design Verification Tests.
2. Seven type tests listed in Table 7 of the superseeded standard have been
replaced by 13 design verification tests that cover constructional and
performance requirements. The 13 Design Verification tests provide three
options with limits and conditions.
3. Responsibilities between the Original Manufacturer (the organisation that is
responsible for the original design and carried out the design verification as
per the standards) and the Assembly Manufacturer (i.e. the switchboard
builder or contractor) have been clearly defined.
4. New tests to cover Constructional Requirements have been added:
• Resistance to corrosion tests
• Resistance to abnormal heat and fire due to internal electric effects
• Lifting tests
• Marking tests

5. Conditions & limits imposed on device substitution.
6. Power frequency withstand voltage tests and impulse withstand voltage tests
are mandatory requirements.

7. Verification of the Forms of Internal Separation is a mandatory requirement.
8. AS/NZS 61439.3 is specific for distribution boards that are intended to
be operated by ordinary persons (DBOs). They must not exceed a current
rating of 250A or have any outgoing circuits exceeding 125A as well as a
number of other addition requirements in addition to those detailed in
AS/NZS 61439.2.

KEY POINTS

MANUFACTURER TYPES

Original Manufacturer
Organisation that carried out the original design and
associated verification.

Assembly Manufacturer
Organisation responsible for the completed assembly.

Evolution DB

NOTE :
Where the Assembly Manufacturer is different to the Original Manufacturer and has done modifications to the original tested
arrangement, this person/company is deemed to be the Original Manufacturer and has to carry out or prove design
verification.

Evolution Distribution Boards-V3
Phone: 1300 556 601 www.ipd.com.au 7