COMBINED ELECTRICAL VARIABLE DETECTION DEVICE

• US 20120001645A1
• Filed: 06/29/2011
• Published: 01/05/2012
• Est. Priority Date: 06/30/2010
• Status: Abandoned Application

• Current Assignee: ABB Technology AG (ABB Limited)
• Original Assignee: ABB Technology AG (ABB Limited)
• Inventors: Javora, Radek, Podzemny, Jaromir
• Application Number:
  US13/172,536
• Publication Number:
  US 20120001645A1
• Time in Patent Office: Days
• US Class Current: 324/658
• CPC Class Codes: G01R 15/04 Voltage dividers
• CPC Class Codes: G01R 15/142 Arrangements for simultaneous measurements of several parameters employing techniques covered by groups G01R15/14 - G01R15/26
• CPC Class Codes: G01R 15/181 using coils without a magnetic core, e.g. Rogowski coils
• CPC Class Codes: H01F 38/34 Combined voltage and current transformers
• CPC Class Codes: H02H 1/0007 concerning the detecting means in general G01R or other subclasses of G01; reed switches H01H71/2445

Abstract

A combined electrical variable detection device comprises a plurality of single-phase current measuring modules (1) arranged in a common frame (2) and having a separate output cable/connection (8) for each module (1). At least one single-phase current measuring module (1) is provided with a voltage detection device. Preferably, the device uses one output cable/connection (7), the signal wires of which are coupled to said output cable/connections (8) from said modules (1). Preferably all single-phase current measuring modules (1) are provided with Rogowski coils as measuring elements. In one embodiment, the combined electrical variable detection device has a residual-current detection device (3) an/or a residual-voltage detection device surrounding more than one of said single-phase current measuring modules (1) in said common frame (2).

Claims

1. A combined electrical variable detection device comprising a plurality of single-phase current measuring modules arranged in a common frame, having a separate output cable/connection for each module, where at least one single-phase current measuring module is provided with a voltage detection device, and wherein the combined electrical variable detection device uses one output cable/connection, the signal wires of which are coupled to said output cable/connections from said modules.

2. The combined electrical variable detection device of claim 1 wherein all single-phase current measuring modules are provided with Rogowski coils as measuring elements.

3. The combined electrical variable detection device of claim 1 wherein all single-phase current measuring modules are provided with a voltage detection device.

4. The combined electrical variable detection device of claim 1 further comprising a residual-current detection device surrounding more than one of said single-phase current measuring modules in said common frame.

5. The combined electrical variable detection device of claim 1 wherein the device comprises three single-phase current measuring modules, each of which is provided with a corresponding-phase voltage detection device, all phase-current measuring modules and phase-voltage detection devices being placed together with a residual-current detection device in said common frame.

6. The combined electrical variable detection device of claim 1 wherein at least one of the phase-current measuring modules is/are fixed in said common frame, and wherein said common frame is capable of embedding additional phase-current measuring modules than the number that is/are actually fixed.

7. The combined electrical variable detection device of claim 6 wherein the voltage detection devices contain resistive or capacitive dividers for voltage detection.

8. The combined electrical variable detection device of claim 6 further comprising at least one temperature sensor.

9. The combined electrical variable detection device of claim 6 further comprising a residual-voltage detection device.