Meter Wiring Verification Using Voltage Comparison
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Solution Overview
Problem
Wiring errors during the installation of electrical energy meters can lead to serious malfunctions or safety hazards, such as short-circuit currents and potential fires, and existing solutions like protective circuit breakers are costly and complicate installations.
Innovation Solution
A method involving a meter with upstream and downstream phase terminals and a cut-off device, using pre-existing voltage sensors to measure and detect wiring errors by comparing upstream and downstream phase voltages, generating an alert if an error is detected, and keeping the cut-off device open until the error is corrected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a protective circuit breaker is used to protect against wiring errors, then the electrical installation is protected from short-circuit currents, but the cost increases and the installation becomes more complicated
Solution Approach 1:
The patent applies preliminary action by performing a wiring verification measurement before the meter is put into operation. The system measures impedance values during installation and compares them against expected ranges to detect wiring errors early, preventing harmful effects before they occur. This eliminates the need for complex protective circuit breakers since the error is detected and corrected in advance.
Solution Approach 2:
The system performs self-service by automatically measuring impedance values and detecting wiring errors without requiring external protective devices. The meter itself carries out the verification function through its processing means and measurement capabilities, eliminating the need for additional protective circuit breakers and simplifying the overall installation.
2Reliability
If a protective circuit breaker is used to protect against wiring errors, then the electrical installation is protected from short-circuit currents, but the cost increases
Solution Approach 1:
The patent applies preliminary action by performing a wiring verification measurement before the meter is put into operation. The system measures impedance values during installation and compares them against expected ranges to detect wiring errors early, preventing harmful effects before they occur. This eliminates the need for complex protective circuit breakers since the error is detected and corrected in advance.
Solution Approach 2:
The system performs self-service by automatically measuring impedance values and detecting wiring errors without requiring external protective devices. The meter itself carries out the verification function through its processing means and measurement capabilities, eliminating the need for additional protective circuit breakers and simplifying the overall installation.
3Productivity
If the cut-off device remains closed during installation, then the meter can operate immediately, but wiring errors can cause serious malfunctions or fires
Solution Approach 1:
The patent applies preliminary action by performing a wiring verification measurement before the meter is put into operation. The system measures impedance values during installation and compares them against expected ranges to detect wiring errors early, preventing harmful effects before they occur. This eliminates the need for complex protective circuit breakers since the error is detected and corrected in advance.
Solution Approach 2:
The patent applies preliminary anti-action by taking preventive measures before wiring errors can cause harm. The system proactively measures and verifies wiring correctness during installation, generating alerts for improper connections before they can lead to short-circuit currents or fires. This preventive approach counteracts potential harmful effects before they manifest.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method provides a simple, inexpensive solution to protect electrical networks and installations from wiring errors by alerting installers of mistakes and preventing potential hazards, ensuring safe and correct meter operation.
Implementation Method 1
measuring an upstream phase voltage upstream of the switchgear and a downstream phase voltage downstream of the switchgear
Data Source
Figure 1
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AI summary
A method for verifying the wiring of an electrical energy meter, the meter (1) comprising an upstream phase terminal (7), a downstream phase terminal (8) and a cut-off member (10) mounted between the upstream phase terminal and the downstream phase terminal, the verification method comprising the steps of: opening the cut-off member; measuring an upstream phase voltage (Vam) upstream from the cut-off member and a downstream phase voltage (Vav) downstream from the cut-off member; detecting, particularly according to a measurement of the upstream phase voltage and a measurement of the downstream phase voltage, a possible wiring error; if a wiring error is detected, generating an alert; if no wiring error is detected, closing the cut-off member and putting the meter in a nominal operating mode.