Page 2 - Techno_Modular_Switchboards

Tests
Requirement : Design Verified Assemblies to AS/NZS 61439.1 & 2:2016.
Routine Tests: On completion of manufacture and at commissioning.
Injection Tests: Carry out primary and secondary injection testing on completion of manufacture to verify
correct operation of protection relays and controls.
Test Certificates: Demonstrating design and components used for deliverables, Short circuit withstand
capability, Size of conductors, Type of bus supports, distance between supports, sizes of
functional unit compartments and Temperature rise of busbars and functional units in
relation to the nominated current rating.

Internal arcing faults tests (Subject to agreement)
Standard or special tests shall be conducted in accordance with AS/NZS 61439.1:2016 Appendix ZD or IEC TR 61641.
Venting must be provided at the top of the switchboard, allowing overpressure to be safely discharged through chimneys.
Ventilation openings must not be located at the front, rear, or sides of the switchboard, as this could compromise operator safety.

Construction of Switchboard

General

Main Switchboards / Motor control Centers, shall be of free-standing modular construction, segregated in accordance with AS/NZS
61439.1:2016, Form 3b, Form 4a, or Form 4b (need to specify). The assemblies shall be fully wired, factory-tested, and complete in
every respect.
The degree of protection shall be IP43 or IP55 for indoor installations.
Access shall be provided from both the front and back, with provisions for top and bottom cable entries. The assemblies shall be
divided into cubicles, ensuring ease of access for initial installation, wiring, and testing, as well as for maintenance, equipment
replacement, and wiring modifications throughout the installation’s lifespan.
A logical layout shall be maintained to enable quick recognition of functional groups.

Structure & Framework

The main framework shall be made of minimum 2mm electro-galvanised powder coated sheet steel. The structural members
of the framework shall be screwed together to ensure rigidity and earth continuity. The structural parts, doors, covers, mounting
plates and other internal parts shall all be of the modular type with dimensions in multiples of 200mm.
Modular construction shall facilitate the ease of any future extensions and/or modifications. All structural components and
cladding shall be of the proprietary type.
Where back-to-back switchboards are needed, the depth framework shall be constructed using continuous members.
The maximum height of the framework (including plinth) shall be no more than 2325mm above finished floor level.
The plinth shall be a Modular type, minimum of 100mm in height and shall be 3mm Hot Dip Galvanized. The plinth profiles shall
include pre-punched holes to facilitate lifting of the switchboard.
Cable zones with cable holders shall be provided for every outgoing functional unit tier.

Doors and Covers
Doors shall be constructed from a minimum of 1.5mm thick steel with right-angle returns on all sides. Pretreated and power coated
finish and fitted with resilient sealing rubber for dust and moisture protection.
Mounted on corrosion-resistant internal hinges with approved door handles, locks, or latches shall be provided.
Maximum door width shall be 800 mm with a minimum swing of 120 degrees.
Covers shall be constructed from a minimum of 1.5mm thick steel with right-angle returns on all sides. Pretreated and power
coated finish.
Minimum 4 fixing screws shall be provided to secured to frames, each equipped with captive steel washers to ensure earthing of
the cover.
Dustproof seals consisting of permanently formed gaskets with polyurethane in a continuous run (seamless) applied during the
manufacture of doors and covers shall be provided. Clip on gaskets will not be accepted. The temperature resistance of the gasket
should be a minimum 80°C.

1300 556 601 | ipd.com.au | 27-05-2025