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Currently, use both the Taylor PD and PND phase failure relays in our current style switchboards. See the attachments for the wiring diagrams, specifications, operating instructions etc. Released for: Schneider Electric USA
Phase failure relays are often used to control a shunt trip circuit breaker. When this is done, care must be taken to insure that the shunt trip circuit always has an adequate source available. This can be accomplished by using the diagram below. If a phase failure occurs on L2 or L3, the shunt trip coil will draw power from L1 through the control
The Phase-Guard is a phase voltage balance monitoring device designed to protect three phase motor equipment from Phase Loss, Reverse Phase, Overvoltage, and Low Voltage (undervoltage) faults.
The most important feature offered by a solid-state overload relay (SSOLR) is phase loss protection. When a phase loss causes a significant current increase in the remaining phases of the motor circuit, there is a major increase in rotor current that can cause motor damage.
normal and 3 phase power applied master relay connections are 1 to 2. When a phase loss occurs master relay will de-energize and contacts 1-3 will be closed. (1-2 will be open) Model PND – On this device the master relay is normally DE-ENERGIZED. When conditions are normal and 3 phase power applied master relay connections are 1to 3. When a
Phase sequence Phase failure detection Time delay type Adjustable 0.1...30 s, +/- 10 % of the full scale value ... 3-Phase Voltage Control Relay Wiring Diagram L1,L2,L3 : Supply to be monitored 11-14,12 : 1st C/O contact of output relay ... Zelio_Control_RM22TR33.pdf Author: ECAT Created Date: 20210112213204Z ...
Function Diagram. Phase Sequence Control and Partial Phase Failure Detection. Legend. Un Nominal 3-phase supply voltage L1, L2, L3 Phases of the supply voltage monitored 11-12, 11-14 Output relay connections Relay status: black color = energized.
