SAFETY SWITCHING DEVICE, IN PARTICULAR FOR MONITORED SWITCHING-ON OF ELECTRICAL AND/OR ELECTRONIC LOAD

To provide a safety switching device, in particular for reliable switching-on of an electrical load.SOLUTION: During a starting process, functionality of, e.g., two not forcibly driven changeover switches (60, 70), particularly their normally closed contacts (63, 73), can be monitored without using...

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Bibliographic Details
Main Authors HENRY PETER, FELIX FRANKE
Format Patent
LanguageEnglish
Japanese
Published 16.11.2023
Subjects
BASIC ELECTRIC ELEMENTS
ELECTRIC SWITCHES
ELECTRICITY
EMERGENCY PROTECTIVE DEVICES
RELAYS
SELECTORS
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Summary:To provide a safety switching device, in particular for reliable switching-on of an electrical load.SOLUTION: During a starting process, functionality of, e.g., two not forcibly driven changeover switches (60, 70), particularly their normally closed contacts (63, 73), can be monitored without using a microcontroller. The normally closed contacts (63, 73) are arranged in respective separate diagnostic circuits (30, 31), which are connected in parallel with respect to a test voltage. The diagnostic circuits (30, 31) are each monitored by a diagnostic current detection device (40, 50). Excitation coils (61, 71) of the changeover switches (60, 70) can be short-circuited via respective short-circuit devices if diagnostic current continues to flow in the respective diagnostic circuits (30, 31) further for a predetermined time period after activation of a starting process.SELECTED DRAWING: Figure 1B 【課題】本発明は、特に電気的負荷の確実なスイッチオンのための安全スイッチングデバイスを提供する。【解決手段】始動プロセス中に、例えば２つの強制駆動されない切り替えスイッチ（６０，７０）、特にそれらの常閉接点（６３，７３）の機能性が、マイクロコントローラを使用することなく監視され得る。常閉接点（６３，７３）は、それぞれ別個の診断回路（３０，３１）内に配置されており、それらは試験電圧に対して並列に接続されている。診断回路（３０，３１）は、それぞれ診断電流検出デバイス（４０，５０）によって監視される。切り替えスイッチ（６０，７０）の励磁コイル（６１，７１）は、始動プロセスが活性化された後、それぞれの診断回路（３０，３１）内を更に所定の期間、診断電流が流れる場合に、それぞれ１つの短絡デバイスによって短絡され得る。【選択図】図１Ｂ
Bibliography:Application Number: JP20230073945