Diagnostic Engineering and Verification of EV Charging Infrastructure

We provide specialized services for the comprehensive evaluation of electric vehicle (EV) charging systems, aimed at precise fault identification, performance analysis, and determination of technical responsibility among the electrical installation, the charging equipment (EVSE), and the vehicle.

Our approach combines measurements in accordance with international standards with technical analysis of real-world operating scenarios.

Technical Scope of the Service

Complete electrical verification of the charging installation
Functional evaluation of the EVSE under simulated conditions
Simulation of electric vehicle behavior (Control Pilot / Proximity Pilot)
Fault diagnosis:
- Intermittent
- Under load
- Dependent on grid conditions
Evaluation of power supply stability during the charging process

Test Methodology

Tests are run under controlled conditions, reproducing real charging scenarios:

Electrical safety verification

Insulation resistance (IR, PI, DAR)
Protective conductor (PE) continuity
Fault loop impedance (Zs)
Prospective short-circuit current

Protection evaluation

Residual current device (RCD) testing:
- Type A
- Type B (required for EV)
Measurement of trip times and residual current

Electric vehicle simulation

IEC states: A, B, C, D
CP (PWM) signal verification
Fault simulation:
- Ground fault (PE fault)
- CP signal error
- Abnormal connection conditions

Analysis during charging

Voltage drop under demand
Dynamic behavior of the system
Identification of abnormal events

Applicable Standards

IEC 61851 – Electric Vehicle Conductive Charging Systems
IEC 60364-7-722 – Electrical installations for EV charging
IEC 61557 – Measuring equipment for electrical installations

Technical Deliverables

Structured technical report with measurement traceability
Log of measured electrical parameters
Evaluation against standard criteria
Technical opinion:
- Installation compliance
- Marginal conditions
- Identification of the probable cause of failure