HV Connector Test — LV 215 / USCAR / IEC 60512

What Is HV Connector?

The high-voltage connector test evaluates the connectors providing the connection between battery, inverter and motor in electric vehicles, for durability and safety. HV connectors carry touch protection that prevents contact with live parts when separated, and an HVIL (high-voltage interlock) circuit that detects a broken connection; these functions are additionally verified.

Purpose of HV Connector

The purpose is to verify that the connector safely carries its declared current and voltage, maintains contact quality under vibration and thermal cycling, and that touch protection is effective.

Which Products Is HV Connector Applied To?

Battery output connectors
Inverter and motor connection connectors
Charge-inlet connectors
Service disconnect switches (MSD)

In Which Sectors Is HV Connector Used?

AutomotiveElectrical & Electronics

Standards Related to HV Connector

IEC 60512 series
LV 215-1
USCAR-2
ISO 6469-3
IEC 60529degree of protection provided by enclosures (IP code) test
ISO 20653Protection against dust, water and contact (IP) in vehicles test

HV Connector Conditions

Temperature rise: The rise at the contact points is measured at rated current
Mating–unmating: The number of cycles prescribed by the standard or the customer's specification
Touch protection: Verified with IPXXB / IPXXD test fingers and probes

Equipment for HV Connector

Temperature-rise test rig
Micro-ohmmeter
Vibration shaker and thermal-cycling chamber
Mating–unmating endurance rig
Dielectric-strength and insulation tester
IP test probes and rigs
Salt fog chamber

Sample Requirements for HV Connector

Connector pair (male and female) and cable connections
Multiple specimen sets for different tests
The declared rated current, voltage, IP class and number of cycles must be stated
Cable cross-section and terminal crimp configuration must represent production

Duration of HV Connector

A complete durability campaign (mechanical, thermal, environmental) takes several weeks.

HV Connector Procedure

1Sample description and nominal values are recorded.
2Initial contact-resistance and insulation measurements are taken.
3The temperature-rise test is carried out.
4Mating–unmating cycles are applied.
5Vibration and thermal-cycling tests are performed.
6Touch protection and the HVIL function are verified.
7Corrosion and IP tests are applied.
8Electrical measurements are repeated after the test.

HV Connector Acceptance Criteria

The acceptance criterion is the temperature-rise limits and post-durability contact-resistance change tolerances of the applied standard or OEM specification (e.g. LV 215, USCAR-2). Meeting the IPXXB/IPXXD requirements is required for touch protection.

Evaluation of Results

Comparing contact resistance before and after durability testing is essential. In HV connectors, even a small increase in contact resistance leads to marked heating under high current.

HV Connector Report

Specimen description and rated values
Applied standard/specification and test list
Temperature-rise results
Electrical measurements before and after durability testing
Touch-protection and HVIL verification
Environmental test findings and photographs

Accreditation

EUROLAB holds internationally recognised accreditation obtained from accreditation bodies party to the IAF and ILAC multilateral recognition arrangements, under ISO/IEC 17025 for laboratory testing, ISO/IEC 17020 for inspection and surveillance, and ISO/IEC 17021-1 and ISO/IEC 17065 for system and product certification. This chain ensures the reports and certificates issued are accepted worldwide.

Whether this test can be offered within accredited scope depends on your product and the standard applied; since accreditation is method-based, the scope is confirmed in writing at the quotation stage.

Scope and authorisations

Related Regulations

ISO 6469-3 electrical safety
UNECE R100

Otomotiv Testleri — What Does This Testing Field Cover?

The section below describes the field that the HV Connector test belongs to; the conditions and acceptance criteria of this particular test are given in the sections above. The scope specific to your product is confirmed in writing at the quotation stage.

Automotive testing shows that a component keeps working under conditions representing the loads it will meet over the life of the vehicle. A vehicle is not a single product but an ENVIRONMENT: vibration, temperature cycling, salt water, stone impact, electrical transients and electromagnetic noise are all present at the same time and for years.

What distinguishes this family is that VEHICLE MANUFACTURER SPECIFICATIONS sit on top of the standards. ISO and SAE publications establish the common ground; but Volkswagen, BMW, Ford, Stellantis, Toyota and Renault define different severity levels, additional tests and different acceptance criteria in their own specifications. For a component, the phrase "complies with automotive standards" is not sufficient on its own; which manufacturer's specification, and which revision of it, must be answered.

The family carries three separate processes together and they are often confused. Homologation covers the type approvals a vehicle needs to enter traffic and runs under state authority. Supplier approval means passing the vehicle manufacturer's own quality and testing requirements and is a commercial relationship. The third is design verification: the engineering team demonstrating that its own design meets its targets.

At component level the test plan is built around the LOCATION OF USE. A module in the engine bay and a module in the boot do not go through the same temperature and vibration profile; a component inside a door and one in the roof console do not see the same water and dust exposure. The ISO 16750 series is the common framework for this location-based approach.

The shift to electric vehicles has reshaped the field. High-voltage safety, insulation coordination, battery safety, charging interface conformity and the electromagnetic behaviour of high-voltage components have been added to the classical automotive test set. In a quiet vehicle, acoustic and vibration expectations have changed too; sounds once masked by the combustion engine are now audible.

The quality system side cannot be separated from testing in this field. A manufacturer under IATF 16949 presents test results in the PPAP file; measurement system analysis, process capability study and the control plan stand around the test report. A single good result is not enough — the process must be shown to be able to repeat it.

Method groups in this field

Environmental and climatic
Temperature cycling, thermal shock, damp heat, salt spray, dust and water ingress (IP), solar radiation. Severity levels vary with the mounting location.
Mechanical
Sine and random vibration, shock, mechanical loads, fastener torque and durability cycles.
Electrical
Supply voltage variations, transients (ISO 7637), reverse polarity, overvoltage, short circuit and sleep current measurements.
EMC
Component emissions (CISPR 25), radiated and conducted immunity (ISO 11452 series), electrostatic discharge (ISO 10605).
Materials and emissions
Odour, fogging and VOC emissions from interior materials; flammability; UV ageing; coating durability and stone impact.
Functional safety and cyber security
Functional safety evidence under ISO 26262 and cyber security engineering under ISO/SAE 21434; these are tied to regulation through UNECE R155 and R156.

Commonly confused in this field

An automotive report without a specification reference is not accepted in the supply chain; which OEM specification and revision was applied must be stated.
Type approval and supplier approval are different processes. A component with E-Mark approval is not thereby considered to have passed the OEM's own acceptance tests.
A result obtained on a prototype does not carry over to series production; PPAP is done with series production parts.
On the EMC side, measuring emissions alone is incomplete; immunity is a separate body of work and is more critical in a vehicle.
On electric vehicle components, high-voltage safety is a distinct competence; classical 12 V test infrastructure is not sufficient.

Which decisions these results support

Supplier component approval and the PPAP file
UNECE type approval and E-Mark marking
Design verification and durability evidence
Root cause analysis of field complaints and warranty returns
Assessing the impact of a design or supplier change

Related Tests

Frequently Asked Questions About HV Connector

What is HVIL and why is it tested?

High Voltage Interlock Loop — a low-voltage monitoring circuit that de-energises the system when the connector is separated. HVIL is expected to break and the system to transition to a safe state before the connector is fully disconnected; timing is therefore verified.