Lumaktaw sa nilalaman
AmpSize

Battery arc flash and class

Battery DVC, hazard class, arc flash energy at PPE level.

AS/NZS 5139

Reads AS/NZS 5139:2019. Tables checked 1 Oct 2026.

Subukan ang isang job 4

Nilalagyan ng halimbawang value ang bawat job. Palitan ang mga ito ng sarili mong value.

Mga input

Worked example gamit ang mga default na input.

Kimika
Lithium ion
Pre-assembled ayon sa Best Practice Guide, o casing na may rating na V0
Hindi
Voltage ng baterya, pinakamataas na d.c.
51.2 V
Bolted fault current sa lugar ng trabaho
6 kA
Arcing time
2 s
Working distance
45 cm
Housing
Enclosure o cabinet ng baterya (factor 3)
Location
Sa loob o sa bahay

Arc flash incident energy

4.55cal/cm²

PPE level
Level 2
Antas ng kahihinatnan
Katamtaman
Arc flash boundary
876mm
Decisive voltage class
A
Antas ng panganib sa sunog
Level 1

Design aid lang ang resultang ito. I-verify ito laban sa kasalukuyang standard.

Mga hakbang ng kalkulasyon

  1. Mapagpasyang klase ng boltaheA

    AS/NZS 5139:2019 Table 3.2

  2. Antas ng panganib sa sunogLevel 1

    AS/NZS 5139:2019 Table 3.1

  3. Mga tinukoy na panganibElectrical, energy, mechanical, explosive gas, at toxic fume

    AS/NZS 5139:2019 Table 3.1

  4. Arcing current, kalahati ng bolted fault current3kA

    AS/NZS 5139:2019 Eq 3.2.4(2)

  5. Multiplying factor3

    AS/NZS 5139:2019 Cl 3.2.4.3

  6. Enerhiya ng arc flash incidentResulta4.55cal/cm²

    AS/NZS 5139:2019 Eq 3.2.4(1)

  7. Arc flash boundary876mm

    AS/NZS 5139:2019 Eq F.4

  8. Antas ng PPELevel 2

    AS/NZS 5139:2019 Table 3.3

  9. Antas ng kahihinatnanKatamtaman

    AS/NZS 5139:2019 Table 6.1

Tungkol sa calculator na ito

How this is calculated

AS/NZS 5139 asks for a battery system to be classed before it is installed: which hazards its chemistry carries, which voltage class it is in, and how much energy an arc at its terminals would release. This tool works all three from a few inputs and reads the tables that follow from them.

The hazards and the fire hazard level come from the chemistry. Lithium ion is fire hazard level 1, lead acid and nickel alkaline level 2. A note to the table lifts the level for pre-assembled lithium equipment that meets the industry Best Practice Guide, and for lead acid or nickel alkaline in cases rated V0. The decisive voltage class comes from the battery's highest d.c. voltage.

The arc flash energy uses the standard's equation. It multiplies the battery voltage, the arcing current, the arcing time divided by the working distance squared, and a factor for where the arc is: at least 3 in an enclosure and 1.5 in a room. The arcing current is half the bolted fault current. The working distance is 45 cm at most. The arcing time is 2 s where the protective device's time is not known, or where the work is on its battery side. The boundary is the distance where the energy falls to 1.2 cal/cm². The appendix tables are this equation at 45 cm and a factor of 3, and a test runs every printed row through it.

The energy then sets the PPE level, the consequence level for the risk assessment, and, in a home or outside one, the limits on where the system may go.

StepTable or clauseWhat it decides
Hazards and fire hazard levelAS/NZS 5139 Table 3.1What the chemistry carries
Decisive voltage classAS/NZS 5139 Table 3.2DVC-A, B or C from the d.c. voltage
Arcing current and energyAS/NZS 5139 Cl 3.2.4The incident energy at the working distance
Arc flash boundaryAS/NZS 5139 Equation F.4Where the energy falls to the boundary level
PPE levelAS/NZS 5139 Table 3.3The arc-rated clothing level
Consequence levelAS/NZS 5139 Table 6.1The consequence for the risk assessment
Home and outdoor limitsAS/NZS 5139 Cl 6.3.2.3Where the system may go at that energy

Worked examples

Limits

The tool works the energy at one point with one arcing time. It does not find the bolted fault current, which comes from the battery maker or the home battery tool, or a fuse's clearing time at that current, which comes from its curve. It does not grade the likelihood side of the risk matrix.

The tool reads the 2019 edition as published. Amendment 1 (2025) is not on hand, so check any change it makes before relying on a figure.

See also: Home battery, Arc flash and Battery.

Mga tanong

Design aid ang resulta. I-verify ito laban sa kasalukuyang standard.

Paano kinakalkula ang battery arc flash energy?

Pinaparami ng AS/NZS 5139 Cl 3.2.4 ang battery voltage, ang arcing current, ang arcing time na hinati sa working distance na naka-square, at ang factor para sa enclosure. Kalahati ng bolted fault current ang arcing current.

Anong arcing time ang dapat kong gamitin?

Gamitin ang 2 s kapag hindi alam ang operating time ng protective device, o kapag ang trabaho ay nasa battery side nito. Sa kabilang panig, gamitin ang oras ng device sa fault current na iyon. Pinapaikli ng fuse sa pagitan ng mga string ang oras at ang energy.

Ano ang decisive voltage class ng battery?

Inuuri ng AS/NZS 5139 Table 3.2 ang d.c. battery bilang DVC-A hanggang 60 V, DVC-B hanggang 120 V, at DVC-C kapag higit pa. Ang DVC-B o DVC-C system ay low voltage installation sa ilalim ng AS/NZS 3000.

Puwede bang lumampas sa 4 cal/cm² ang home battery?

Oo, sa ibaba ng 40 cal/cm². Kapag higit sa 4, dapat nasa dedicated na room o enclosure na hindi nakakabit sa gusaling may habitable rooms, o dapat nakakatugon sa fire hazard level 1, at hindi sa loob o nakadikit sa ganoong gusali. Puwedeng ibaba ito ng inter-string protection.

Aling PPE level ang kailangan ko?

Itinatakda ng AS/NZS 5139 Table 3.3 ang PPE level ayon sa enerhiya: level 1 hanggang 4 cal/cm², level 2 hanggang 8, level 3 hanggang 25 at level 4 hanggang 40. Kapag higit sa 40, walang PPE level na nalalapat.

Mga worked example

Background

Mga clause at table na binabasa ng tool na ito

Bawat clause at table, kasama kung paano ito na-verify

Huling na-check ang mga table noong 1 Oct 2026.

Mga kaugnay na tool

Nakatulong ba ito?

May tanong, o may value na mukhang mali? Makipag-ugnayan sa amin.