Test Device Ternary Signal Separation Switchgear Control
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Solution Overview
Problem
Current testing devices for control units of switching devices in switchgear installations require additional complex and costly adapter cables with external electronics to simulate switching devices, leading to increased complexity and error risk due to the need for binary signal inputs and varying electrical properties for different devices.
Innovation Solution
A testing device with a ternary signal input, featuring a separation unit that divides input signals into positive and negative tracks, allowing direct connection to control lines without external components, reducing the number of inputs needed and simplifying adapter cable production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If adapter cables with external electronics are used to simulate switching devices, then testing functionality is enabled, but device complexity and error risk increase
Solution Approach 1:
The patent extracts the electronic simulation functionality from the adapter cable and integrates it directly into the testing device. The testing device now contains internal circuits that generate test signals and simulate switching device behavior, eliminating the need for external electronics in the adapter cable. This reduces adapter cable complexity to simple connectivity while maintaining testing reliability.
Solution Approach 2:
The patent introduces a ternary signal input as an intermediary interface between the adapter cable and the testing device. This ternary input accepts three states (high, low, and floating) and internally processes them to simulate switching device operations. The intermediary handles the complexity internally, allowing simple adapter cables to connect to control lines without requiring external electronic components.
2Ease of operation
If binary signal inputs are used for testing, then control unit testing is enabled, but the number of inputs and cabling complexity increase
Solution Approach 1:
The patent implements a universal ternary signal input that can handle multiple testing functions through a single interface. The ternary input accepts high, low, and floating states, allowing it to simulate both normally open and normally closed switching devices, as well as handle impulse signals and continuous signals. This multi-functional input reduces the number of separate inputs needed while maintaining ease of operation for various testing scenarios.
3Ease of manufacture
If adapter cables with electronic components are used, then signal separation is achieved, but manufacturing cost and error risk increase
Solution Approach 1:
The patent extracts the signal separation functionality from the adapter cable and implements it within the testing device's ternary signal input circuitry. The adapter cable becomes a simple passive connector, dramatically easing manufacturing while the testing device internally handles the complex signal separation and processing. This maintains signal separation reliability through integrated design while simplifying adapter cable production.
Data Source
AI summary
Test device having a signal input with a positive pin and a negative pin, between which an-input signal may be applied. Test device has a separation unit which is connected to the positive pin and to the negative pin and is configured to separate a positive signal component in the form of a positive track from the input signal, to output said signal component at a first pin, to separate a negative signal component in the form of a negative track from the input signal and to output said signal component at a second pin. The use of the test device to test a control unit of the switching device is described, wherein the test device simulates the switching device, the signal input of the test device is connected to the control unit and the control unit outputs an input signal to the signal input.