油流繼電器（流量指示器）是顯示變壓器強迫油循環冷卻系統內油流量變化的裝置。用來監視強油循環冷卻系統的油泵運行情況，如油泵轉向是否正確，閥門是否開啟，管路是否有堵塞等情況，當油流量達到動作油流量或減少到返回油流量時均能發出報警信號。 系列產品型號：BLZ(YJ)-50/80/100/125/150。 【Application The oil flow indicator is a kind of device used for indicating the quantity of Oil flow in the transformer cooling system with forced oil circulation and supervising the operation situation of oil pump of cooling system with forced oil circulation, such as whether the rotation direction of oil pump is correct, the valve is opened, the conduit is blocked, etc .The indicator can initiate the alarming signal when the quantity of oil flow increases to the action oil flow quantity or decreases to the return oil flow quantity. TYPE:YJ-50/80/100/125/150】