CONTROL RELAY EL-22 PUMP CONTROL AND ALARM

MONITORING RELAY KARI-FINN EL-22 FOR DRY RUN PROTECTION. For preventing dry running of borehole pumps, controlling filling and draining pumps, operating motors and magnetic valves, high and low level alarms – for dosing, monitoring pipes and tanks under over- and under-pressure, equipped with floor sensor for room flood monitoring. ADJUSTABLE SENSITIVITY. Approved by SGS FIMKO OY. USAGE: KARI Electrode Switch EL-22 controls the pump's overload switch according to liquid level fluctuations. In single-phase operation, pumps with power below 0.37 kW can be directly controlled by the electrode switch. The KARI Electrode Switch can be used only in electrically conductive liquids. The operating range is very wide because the sensitivity of KARI EL-22 can be adjusted to match the conductivity of the liquid. The maximum allowable resistance between electrodes is 100 kohm measured at 50 Hz frequency. Safety of operation is ensured by a double-insulated transformer and by placing the electrode and high-current circuit connectors on opposite sides of the housing. Since the connectors are on opposite sides of the housing, a wire disconnection will not cause a hazardous condition in the electrode circuit. This product description is an automated translation of the original Finnish description.