Apparatus for insulating monitoring

• US 9,891,262 B2
• Filed: 12/18/2014
• Issued: 02/13/2018
• Est. Priority Date: 12/19/2013
• Status: Active Grant

• Current Assignee: Bender GmbH & Co. KG, Hella Gmbh & Co. Kgaa (Forvia SE)
• Original Assignee: Bender GmbH & Co. KG, Hella Gmbh & Co. Kgaa (Forvia SE)
• Inventors: Kullick, Sven, Lehr, Mario, Jger, Hans-Jrgen, Wei, Carsten
• Primary Examiner(s): Vazquez, Arleen M
• Assistant Examiner(s): Shah, Neel
• Application Number:
  US14/574,431
• Publication Number:
  US 20150177308A1
• Time in Patent Office: 1,153 Days
• Field of Search: 324503, 324509, 324551, 324525, 324541, 324426
• CPC Class Codes: B60L 3/0069 relating to the isolation, e.g. ground fault or leak current
• CPC Class Codes: G01R 31/006 on road vehicles, e.g. automobiles or trucks testing of ignition installations peculiar to internal combustion engines F02P17/00
• CPC Class Codes: G01R 31/1245 of line insulators or spacers, e.g. ceramic overhead line cap insulators; of insulators in HV bushings
• CPC Class Codes: G01R 31/3277 of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches
• CPC Class Codes: G01R 31/52 Testing for short-circuits, leakage current or ground faults

Abstract

The invention relates to an apparatus for insulation monitoring between a low-voltage supply system and a high-voltage supply system, wherein the apparatus can be connected both to a high-voltage positive connection and also to a high-voltage negative connection and also to the low-voltage supply system, wherein the apparatus has a plurality of electrical contacts for coupling monitoring connections to the high-voltage circuit by means of a respective high-voltage positive connection and by means of a respective high-voltage negative connection, it being possible for said contacts to be connected in different sections of the high-voltage supply system.

Claims

1. An apparatus for insulation monitoring between a low-voltage supply system and a high-voltage supply system, wherein the apparatus is connected to a high-voltage positive connection of the high-voltage supply system, to a high-voltage negative connection of the high-voltage supply system, and to the low-voltage supply system, wherein the apparatus comprises a plurality of monitoring connections, wherein each monitoring connection comprises a positive coupling and a negative coupling, wherein each positive coupling is connected to the high-voltage positive connection, wherein each negative coupling is connected to the high-voltage negative connection, wherein the high-voltage system comprises a plurality of high-voltage sections divided from one another by a plurality of switches arranged on the high-voltage positive connection and the high-voltage negative connection, wherein each monitoring connection is connected to a different section of the plurality of high voltage sections of the high-voltage supply system, wherein the apparatus detects faults between the high-voltage supply system and the low-voltage supply system in an insulation arranged between the high-voltage supply system and the low-voltage supply system, wherein the apparatus detects voltage deviations between the plurality of high-voltage sections of the high-voltage system.

2. The apparatus according to claim 1, wherein the plurality of monitoring connections comprises a first monitoring connection and a second monitoring connection, wherein at least the first monitoring connection can be physically disconnected from the high-voltage supply system and at least the second monitoring connection can be physically disconnected from the high-voltage supply system.

3. The apparatus according to claim 1, wherein both an active and a passive monitoring method for monitoring the insulation are carried out by the apparatus.

4. The apparatus according to claim 1, wherein the plurality of high voltage sections of the high-voltage supply system can be disconnected from one another by switching apparatuses.

5. The apparatus according to claim 1, wherein the monitoring connections of the plurality of monitoring connections each have a predefined internal resistance, wherein the magnitude of this internal resistance differs from section to section of the plurality of high voltage sections.

6. The apparatus according to claim 1, wherein the monitoring connections of the plurality of monitoring connections each have a predefined internal resistance, wherein the magnitude of this internal resistance is identical from section to section.

7. The apparatus according to claim 1, wherein the internal resistance of the monitoring connections of the plurality of monitoring connections that cannot be physically deactivated is 10 times larger than in the monitoring connection that can be physically deactivated.

8. The apparatus according to claim 1, wherein a voltage measurement can be carried out on the high-voltage supply system by measuring the voltage of the high-voltage positive connection and also by measuring the voltage of the of the high-voltage negative connection.

9. The apparatus according to claim 1, wherein the plurality of monitoring connections comprises a first monitoring connection and a second monitoring connection, wherein at least the first monitoring connection can be physically deactivated and at least the second monitoring connection can be physically deactivated.

10. The apparatus according to claim 1, wherein the plurality of monitoring connections comprises (i) a first monitoring connection and a second monitoring connection that cannot be physically disconnected from the high-voltage supply system and (ii) a third monitoring connection can be physically disconnected from the high-voltage supply system.

11. The apparatus according to claim 1, wherein a first section of the plurality of high-voltage sections contains a battery charging unit, and wherein a third section of the plurality of high-voltage sections contains a battery.

12. An apparatus for insulation monitoring between a low-voltage supply system and a high-voltage supply system, wherein the apparatus is connected to a high-voltage positive connection of the high-voltage supply system, to a high-voltage negative connection of the high-voltage supply system, and to the low-voltage supply system, wherein the apparatus comprises a plurality of monitoring connections, wherein each monitoring connection comprises a positive coupling and a negative coupling, wherein each positive coupling is connected to the high-voltage positive connection, wherein each negative coupling is connected to the high voltage negative connection, wherein the high-voltage system comprises a plurality of high-voltage sections divided from one another by a plurality of switches arranged on the high-voltage positive connection and the high-voltage negative connection, wherein a first section of the plurality of high-voltage sections contains a battery charging unit, and wherein a third section of the plurality of high-voltage sections contains a battery, wherein each monitoring connection is connected to a different section of the plurality of high-voltage sections of the high-voltage supply system, wherein the apparatus detects faults between the high-voltage supply system and the low-voltage supply system in an insulation arranged between the high-voltage supply system and the low-voltage supply system, wherein the apparatus detects voltage deviations between the plurality of high-voltage sections of the high-voltage system, wherein the plurality of monitoring connections comprises (i) a first monitoring connection and a second monitoring connection that cannot be physically disconnected from the high-voltage supply system and (ii) a third monitoring connection can be physically disconnected from the high-voltage supply system.