DFC01DB48 Carlo Gavazzi

DFC01DB48, Control relays and Protection Frequency Control Model DFC01, DFC01DB48, Frequency level control relay. It measures the frequency of its own supply voltage. They allow separate control of the maximum and minimum frequency levels, with two alarm points, delay times and independent relay outputs. LEDs indicate the status of the alarm and the output relay., DFC01DB48, These devices control the frequency level of their own supply voltage. Example 1 (relay normally activated) The two relays are disabled when the measured frequency is above the minimum level and below the maximum level. If the measured frequency remains above the selected maximum level for a time exceeding the adjusted delay, relay 1 is activated; if the frequency is kept below the min level for a time exceeding the adjusted delay, relay 2 is activated. The two relays disconnect when the measured frequency is back within the selected limits. The red LED flashes until the delay ends or until the measured value is back within the set limits. Example 2 (relay normally activated) The relay connects and the yellow LED remains lit while the measured frequency is within the selected maximum and minimum limits. Relay 1 disconnects and is placed in the alarm position when the measured frequency remains above the selected max level for a time exceeding the established delay period; relay 2 disconnects when the measured frequency is kept below the min level for a time that exceeds the selected delay period. The red LED flashes until the delay ends or until the measured value is back within the selected limits. The two relays connect when the measured frequency is within the established limits.