Voltage class

Example

Use in Lemonergy

Relate protection to faults, detection and response.

This is a reference concept. No executable Lemonergy block has been verified for this term.

Connected concepts

Related concepts from the knowledge graph. Connections show context, not cause and effect. Hover or focus a linked term for its definition.

48 V system

A vehicle electrical architecture at 48 V, used for mild hybrids and heavy accessories. It stays below the 60 V threshold at which high-voltage safety rules begin, so it needs no orange cables or interlocks.

Extra-low voltage

Voltage low enough to need reduced shock protection: at most 50 V AC rms or 120 V ripple-free DC under IEC 61140. SELV is separated from higher voltages and from earth; PELV is separated but earthed; FELV is low in value only, without protective separation, so it is protected like the circuit feeding it. Vehicle rules draw their line lower, at 60 V DC.

High-voltage interlock loop

A low-voltage signal loop threaded through every high-voltage connector and cover. Opening any of them breaks the loop and the BMS drops the contactors, so a technician cannot reach a live conductor.

ISO 6469

The ISO series on electric vehicle safety: part 1 the on-board rechargeable energy storage system, part 2 vehicle operational safety, part 3 electrical safety, part 4 post-crash. It is the engineering standard behind the regulatory tests of R100.

Pack voltage

The nominal voltage of the full series string, about 400 V in most electric cars and 800 V in newer ones. Doubling the voltage halves the current for the same power, so cables, connectors and losses shrink and charging can be faster.

UN Regulation No. 100

The UNECE type-approval regulation for the electric powertrain of cars, buses and trucks, covering protection against electric shock and, in part II, the rechargeable energy storage system itself. A vehicle sold in the EU and most of the world must carry an R100 approval for its battery.

References & further reading

Further reading on this topic

These sources provide broader context; they are not presented as citations for every statement in this entry.

1. ISO 26262-1:2018 — Road vehicles — Functional safety — Part 1: Vocabulary

   International Organization for Standardization · 2018

   Topic background · Scope and terminology of automotive electrical/electronic functional safety. The catalogue is not the full standard.