Ground DC isolation

G-DCI 1
Are all components verified as not having been issued with a recall notice from manufacturers or regulators?

Applicable rating: Needs rectification

G-DCI 2
Are installed DC isolator(s) on the Electrical Regulator Authorities Council (ERAC) list?

Applicable rating: Needs rectification

G-DCI 3
Is there evidence of loose connections in the DC cables and connections with signs of heat (sight, smell etc)?

Applicable rating: Unsafe

AS/NZS 3000:2018 Clause 3.7.2.3

AS/NZS 5033:2021 Clause 3

G-DCI 27
Is there evidence of loose connections in the DC cables and connections with no signs of heat (sight, smell etc)?

Applicable rating: Needs rectification

AS/NZS 3000:2018 Clause 3.7.2.3

AS/NZS 5033:2021 Clause 3

G-DCI 5
Is the DC isolator (or DC C/B) able to be secured in the open position?

Applicable rating: Needs rectification

G-DCI 6b
Do all PCE adjacent and physically separate load break disconnection devices conform to the following requirements:

• are readily available?
• are adjacent to the PCE?
• are contained in metal enclosures of at least 0.2mm thickness OR are mounted on a non-combustible surface that extends at least 200mm beyond the sides of the disconnector OR are mounted on non-combustible shrouds that are made of metal surface at least 0.2mm thickness?
• have any penetrations through a surface that protects against the spread of fire, with internal diameter greater than 5mm, sealed with a fire-retardant material?

Applicable rating: Improvements identified (For Information)

G-DCI 7
Have all load break disconnection devices been labelled with the following text? "PV ARRAY d.c. ISOLATOR".

Applicable rating: Improvements Identified (For Information)

G-DCI 8
Do all DC enclosure(s) at the inverter have the required IP rating (minimum IP55 if outdoors, minimum IP2X if indoors)?

Applicable rating: Improvements identified (For information)

G-DCI 30
Are all dedicated individual enclosures containing switch disconnection devices protected against the effects of weather and water as per appendix K of AS/NZS 5033:2021?

Applicable rating: Needs rectification

G-DCI 31
Have all enclosures containing d.c. conductor terminations been installed in line with the following conditions:

• enclosure has been mounted onto its mounting bracket or wall using the screw locations and screw types specified by the manufacturer?
• enclosures do not have debris or dust from installation process left inside once mounted?
• all return conductors routed through an enclosure containing terminations maintain double insulation?

Applicable rating: Needs rectification

G-DCI 32
Do all entry/exits into enclosures containing DC conductor terminations conform to the following requirements:

• conduit entry/exits and fittings are installed in accordance with manufacturer's instructions, including water ingress requirements such as being glued?
• only manufacturer provided entry/exit points have been used?
• cable glands, conduits and fitting do not enter/exit the top face of the enclosure (excluding entry/exit points between disconnection device/s, and PCE/s mounted indoors)?
• silicone or sealant products are not used for sealing entry/exit points unless specified by the disconnector manufacturer's instructions?

Applicable rating: Needs rectification

G-DCI 33
Do all cable glands connected to DC enclosures containing DC conductor termination and used in an outdoor environment conform to the following installation requirements:

• are used to enter/exit enclosures containing conductor terminations?
• are installed so each cable enters/exits through an individual hole?
• are rated to at least IP 56?
• have a hole diameter to maintain IP rating for the cables used?
• have any spare holes sealed with gland manufacturer's approved sealing plug?

Applicable rating: Needs rectification

G-DCI 34
Where cable glands enter/exit the side face of an enclosure containing d.c. conductor terminations and installed in an outdoor environment, has an appropriate drip loop been installed, and are all glands located within a protected zone of 30 degree as outlined in figure 4.8 and 4.9 of AS/NZS 5033:2021?

Applicable rating: Needs rectification

G-DCI 36
For all continuous conduit systems that have a section installed in an outdoor environment, and that terminate into an enclosure containing a disconnection device, have all conduit ends been sealed with a gland conforming to AS/NZS 5033:2021 Cl 4.4.7.2.2?

Applicable rating: Needs rectification

G-DCI 35
For all continuous conduit systems that have a section installed in an outdoor environment, and that terminate into an enclosure containing a disconnection device, has a liquid draining device been installed at the lowest point of the conduit system that is rated to at least IP56?

Applicable rating: Needs rectification

G-DCI 29
Is there evidence of water found in ground DC enclosures containing conductor terminations?

Applicable rating: Needs rectification

AS/NZS3000:2018 Clauses 4.1.2 and 4.1.3

AS/NZS 5033:2021 Clause 4.4.6 and 4.4.7

G-DCI 10
Are there signs of water damage observed at ground DC enclosures containing conductor terminations?

Applicable rating: Unsafe

AS/NZS3000:2018 Clauses 4.1.2 and 4.1.3

AS/NZS 5033:2021 Clause 4.4.6 and 4.4.7

G-DCI 11
Are the DC isolator(s) at the inverter readily available and do they facilitate safe operation, inspection, testing and maintenance?

Applicable rating: Needs rectification

AS/NZS 3000:2018 Cl 1.4.19, 1.6.1(d) and 2.3.2.2.1

AS/NZS 5033:2021 Clause 4.3.5.3.1 (b)

G-DCI 12
Do all ground DC isolators conform to these requirements:

• are rated for DC use?
• conform with switch disconnector requirements of AS 60947.3 with utilization category d.c.-PV2?
• interrupt all live conductors simultaneously?
• are capable of being secured in the open position?
• have an independent manual operation?
• are not polarity sensitive?

Applicable rating: Needs rectification

G-DCI 14
Is the DC isolator(s) at the inverter correctly wired?

Applicable rating: Needs rectification

AS/NZS 5033:2021 Clause 4.4.3.3

AS/NZS 3000:2018 Clause 4.1.2

G-DCI 15
Is the load breaking DC isolator(s) located adjacent to the inverter correctly rated for the required DC voltage and current?

Applicable rating: Unsafe

G-DCI 16
If multiple DC isolators are installed at the inverter, are they grouped/ganged so that they operate simultaneously, or grouped/ganged in a common location?

Applicable rating: Improvements identified (For information)

G-DCI 17
If multiple DC isolators are installed at the inverter, is there a sign stating "WARNING: MULTIPLE d.c. SOURCES - TURN OFF ALL d.c. ISOLATORS TO ISOLATE EQUIPMENT".

Applicable rating: Needs rectification

G-DCI 18
Number of DC isolators installed at the inverter.

Applicable rating: No rating is applied

G-DCI 20
Isolator Manufacturer at the inverter.

Applicable rating: No rating is applied

G-DCI 21
Isolator Model No. at the inverter.

Applicable rating: No rating is applied

G-DCI 22
Voltage rating per leg (V).

Applicable rating: No rating is applied

G-DCI 23
Current rating per leg (I).

Applicable rating: No rating is applied

G-DCI 24
Number of modules in.

Applicable rating: No rating is applied

G-DCI 25
Number of modules in parallel.

Applicable rating: No rating is applied