Fundamentals of electrics and high voltage technol

A1.1.1.5

Protection measures in HV vehicles

In an IT system (IT: French Isolé Terre), the conductive housings of the equipment are grounded but the energy source is not. The high-voltage drive systems of electric and hybrid vehicles are designed in this way. For example, the housings of the inverter and the electric motor are connected to each other via the chassis. This connection represents the equipotential bonding.

The essential features of such a system include the permanent monitoring of the insulation resistance and a low-resistance potential equalization resistance.

LEYBOLD offers all required components as plug-in elements, which are operated on a 24 V low voltage level for the harmless examination of such systems.

Voltages as well as the equipotential bonding resistance can be measured directly with Sensor-CASSY 2, the insulation resistance is determined and evaluated with a specially designed measuring device.

1 727 5187 Basics of HV safety, STE, set

***Measuring equipment***
1	524 013SKFZ	** Sensor-CASSY 2 Starter, Automotive
1	739 835 8	** Kelvin-sensing cable, set of 2
1	739 836	** Milliohm meter
1	739 004 8	** DMM for electrical vehicles
1	739 949 8	** HV PC measurement adapter for E-Mobility

***Accessories***
4	500 59 8	Safety bridging plugs, black, set of 10
4	726 501 4	Safety socket plug-in board, 297 mm x 200 mm
3	500 602 4	Safety experiment cable, 10 cm, blue
1	500 612 4	Safety experiment cable, 25 cm, blue
4	500 611 4	Safety experiment cable, 25 cm, red
2	500 620 4	Safety connecting lead 50 cm, yellow/green
2	500 641 8	Safety experiment cable, 100 cm, red
2	500 642 4	Safety experiment cable, 100 cm, blue
1	726 890 8	DC power supply unit 1...32 V/0...20 A
1	773 010 8	Power Supply DC 24 V / 6.5 A
1	778 810	LIT-digital: Fundamentals of automotive electrical systems
1	775 003DE 4	LIT-print: Fundamentals of electrics and high voltage technology, German
1	775 003EN	LIT-print: Fundamentals of electrics and high voltage technology
1	727 585 4	* STE universal case

Fundamentals of electrics and high voltage technol

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