Overview
Insulation monitoring of AC and DC insulation faults for ungrounded systems (IT systems) in the Range of 0…600 V peak
Power supply for all internal voltages
Continuous measurement of the insulation resistance of 0 Ω…50 MΩ
Response time of ≤ 20 s for measured insulation resistance (Using DC pulses (DCP))
Automatic adaptation to the existing mains leakage capacity (≤ 1 μF)
Detection of ground faults and missing ground
Second voltage measurement
The device works when:
– the high voltage voltage voltage range is unstable
– the high voltage voltage voltage range is switched off
– Symmetric or unbalanced errors occur
– Errors occur between the high voltage voltage range and the supply voltage
Galvanic isolation of all signals from the high voltage voltage voltage range
HV coupled system
Can bus interface
Light weight 220g (including housing and connection frame)
Description
The ISOMETER® monitors the insulation resistance between the active high-voltage components of an electrical drive system (UN = DC 0 V…600 V) and the measuring device (vehicle earth). The patented measurement method monitors the insulation status on the DC and AC side of an electrical drive system.
The ISOMETER® is fitted with three connectors. To achieve internal galvanic isolation, connector 1 is connected to the low voltage ranges and connectors 2 and 3 to the high voltage ranges in the vehicle.
Due to its small footprint and optimized measurement technology, the device is ideally suited for use in hybrid vehicles or fully electric vehicles. The device meets the increased requirements for environmental conditions in the automotive sector (e.g. Temperatures and vibrations, EMC). Thanks to the CAN bus interface of the ISOMETER®s, it can be seamlessly integrated into an existing CAN environment.
The ISOMETER® iso165C and iso165C-1 consist of two main components, the Vehicle Interface Controller (VIFC) and the Insulation Monitoring Controller (IMC). The VIFC consists of a microcontroller with UART communication interface, which transparently translates the requests from the HS-CAN bus and transmits them to the IMC. The corresponding IMC responses are sent back to the requesting instance via the HS-CAN bus. The VIFC monitors the operating state of the IMCs via a so-called "alive" signal and queries internally and cyclically the insulation value and the operating state of the IMCs. The results are sent cyclically as an informal message via the HS-CAN bus.
The IMC consists of HV connectors with HV coupling relays, the measuring circuit and a microcontroller for the analysis of the measurement results. Using the measurement results, the IMC generates an internal alarm information that is encoded to generate the previously mentioned “alive” signal. This signal is transmitted parallel to the measurements and status information to the VIFC and from there via the HS-CAN bus. The IMC is electrically isolated from the vehicle environment. When the device is first switched on, the ISOMETER® iso165C only carries out measurements when communication between the VIFC and the IMC is established. In addition, the HV coupling relays of the HV1 voltage path are open by default and therefore no valid measurement of the voltage HV1 and the insulation resistance is possible until these relays are closed by an external command. As soon as these conditions are met, the ISOMETER® iso165C can immediately start measuring voltages HV1, HV2 and insulation resistance.
Keywords
Bender, B91068175, iso165C, emobility, e mobility, charger
Image is similar
