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Home >> Smart >> 2017 >> Fortwo Electric Drive, 2D Convertible >> Repair and Diagnosis (Single Page) >> Electrical >> Charging Systems >> Electrical System, Equipment & Instruments - 453 Chassis - 2 Of 3 >> Testing & Repair >> Perform protective earth conductor and insulation resistance test - AR54.10-P-0019-01MEV

Perform protective earth conductor and insulation resistance test - AR54.10-P-0019-01MEV

MODEL 451.390/490 

MODEL 453.091/391/491 

REFER TO SELF-DIAGNOSTIC SYSTEMS Connect diagnostic unit, read out fault memory Model 453.091/391/491 AD00.00-P-2000-06SR
REFER TO SELF-DIAGNOSTIC SYSTEMS Connect STAR DIAGNOSIS and read out fault memory Model 451.390/490 AD00.00-P-2000-04MCC
REFER TO SPECIAL TOOLS 000 588 00 19 00 Insulation measuring unit   WS54.00-P-0046B

NOTES The insulation resistance measurement on high-voltage components must not be performed between HV+ (positive) and HV- (negative).

Otherwise the HV components may be damaged.

NOTES Carefully connect the probes of the insulation resistance tester to the HV connections.

Otherwise the HV connections may be damaged.

IMPORTANT The test must be performed if the ground fault circuit breaker (RCD) in the charging cable or the ground fault circuit breaker of the ground fault circuit breaker (RCD/FI) in the charge supply device have triggered, or the charger or the charger feed socket were replaced.

IMPORTANT The test should only be performed on the high-voltage on-board electrical system after it has been disabled.

IMPORTANT An insulation resistance tester is used for testing.

IMPORTANT It must be ensured that the insulation resistance tester is in proper working order before commencing testing work in accordance with the manufacturer's specifications.

  1. Open cover of charger feed-in socket (X58/23).
  2. Check if protective earth conductor (PE) is connected.

    IMPORTANT The protective earth conductor (PE) is the yellow/green line that is connected to the charger.

  3. Check bolted connection of protective earth conductor (PE) on charger is firmly seated.

    If bolted connection is loose.

    Tighten bolted connection.

  4. Calibrate insulation resistance tester.
    G12093949Courtesy of MERCEDES-BENZ USA

    Insulation/resistance measurement for HVAC circuit, 1-phase (charger feed socket measuring point (X58/23)) 

  5. Model 451.390/490

    except code 908 (Bordlader 22kW)

    Model 453.091/391/491

    Perform resistance measurement between protective earth conductor (PE) of charger feed socket (X58/23) and ground point on vehicle.

    IMPORTANT Specified value ≤ 1 Ω + 0, 9 Ω.

  6. Model 451.390/490

    except code 908 (Bordlader 22kW)

    Model 453.091/391/491

    With a test voltage of 500 V at the insulation resistance tester, perform the insulation/resistance measurement between phase L1 (L1) and the protective earth conductor (PE) of the charger feed socket (X58/23).

    IMPORTANT Specified value ≥ 1 MΩ.

  7. Model 451.390/490

    except code 908 (Bordlader 22kW)

    Model 453.091/391/491

    With a test voltage of 500 V at the insulation resistance tester, perform the insulation/resistance measurement between the neutral conductor (N) and the protective earth conductor (PE) of the charger feed socket (X58/23).

    IMPORTANT Specified value ≥ 1 MΩ.

    G12093950Courtesy of MERCEDES-BENZ USA

    Insulation/resistance measurement for HVAC circuit, 3-phase (charger feed socket measuring point (X58/23)) 

  8. Model 451.390/490

    with code 908 (Bordlader 22kW)

    Perform resistance measurement between protective earth conductor (PE) of charger feed socket (X58/23) and ground point on vehicle.

    IMPORTANT Specified value ≤ 1 Ω + 0, 9 Ω.

  9. Model 451.390/490

    with code 908 (Bordlader 22kW)

    With a test voltage of 500 V at the insulation resistance tester, perform the insulation/resistance measurement between phase L1 (L1) and the protective earth conductor (PE) of the charger feed socket (X58/23).

    IMPORTANT Specified value ≥ 1 MΩ.

  10. Model 451.390/490

    with code 908 (Bordlader 22kW)

    With a test voltage of 500 V at the insulation resistance tester, perform the insulation/resistance measurement between phase L2 (L2) and the protective earth conductor (PE) of the charger feed socket (X58/23).

    IMPORTANT Specified value ≥ 1 MΩ.

  11. Model 451.390/490

    with code 908 (Bordlader 22kW)

    With a test voltage of 500 V at the insulation resistance tester, perform the insulation/resistance measurement between phase L3 (L3) and the protective earth conductor (PE) of the charger feed socket (X58/23).

    IMPORTANT Specified value ≥ 1 MΩ.

  12. Model 451.390/490

    with code 908 (Bordlader 22kW)

    With a test voltage of 500 V at the insulation resistance tester, perform the insulation/resistance measurement between the neutral conductor (N) and the protective earth conductor (PE) of the charger feed socket (X58/23).

    IMPORTANT Specified value ≥ 1 MΩ.

    G12093951Courtesy of MERCEDES-BENZ USA

    Insulation/resistance measurement for HVAC circuit, 1-phase (charging cable measuring point (3)) 

  13. Model 451.390/490

    except code 908 (Bordlader 22kW)

    Model 453.091/391/491

    With a test voltage of 500 V at the insulation resistance tester, perform the insulation/resistance measurement at one of the two charging cable connectors (3) between phase L1 (L1) and the protective earth conductor (PE).

    IMPORTANT Specified value ≥ 1 MΩ.

  14. Model 451.390/490

    except code 908 (Bordlader 22kW)

    Model 453.091/391/491

    With a test voltage of 500 V at the insulation resistance tester, perform the insulation/resistance measurement at one of the two charging cable connectors (3) between the neutral conductor (N) and the protective earth conductor (PE).

    IMPORTANT Specified value ≥ 1 MΩ.

    G12093952Courtesy of MERCEDES-BENZ USA

    Insulation/resistance measurement for HVAC circuit, 3-phase (charging cable measuring point (3)) 

  15. Model 451.390/490

    with code 908 (Bordlader 22kW)

    With a test voltage of 500 V at the insulation resistance tester, perform the insulation/resistance measurement at one of the two charging cable connectors (3) between phase L1 (L1) and the protective earth conductor (PE).

    IMPORTANT Specified value ≥ 1 MΩ.

  16. Model 451.390/490

    with code 908 (Bordlader 22kW)

    With a test voltage of 500 V at the insulation resistance tester, perform the insulation/resistance measurement at one of the two charging cable connectors (3) between phase L2 (L2) and the protective earth conductor (PE).

    IMPORTANT Specified value ≥ 1 MΩ.

  17. Model 451.390/490

    with code 908 (Bordlader 22kW)

    With a test voltage of 500 V at the insulation resistance tester, perform the insulation/resistance measurement at one of the two charging cable connectors (3) between phase L3 (L3) and the protective earth conductor (PE).

    IMPORTANT Specified value ≥ 1 MΩ.

  18. Model 451.390/490

    with code 908 (Bordlader 22kW)

    With a test voltage of 500 V at the insulation resistance tester, perform the insulation/resistance measurement at one of the two charging cable connectors (3) between the neutral conductor (N) and the protective earth conductor (PE).

    IMPORTANT Specified value ≥ 1 MΩ.