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We have used the phase failure relays manufactured by Taylor for the past 30 years. 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
Maximum switching voltage. 250 V AC 250 V DC. Minimum switching current. 10 mA at 5 V DC. Supply voltage limits. 183...528 V AC. Control circuit voltage limits. 12 % + 10 % Un.
Phase failure detection Time delay type Adjustable 0.1...30 s, +/- 10 % of the full scale value on crossing the threshold Tt ... Schneider Electric declaration of conformity REACh Reference not containing SVHC above the threshold ... 3-Phase Voltage Control Relay Wiring Diagram L1,L2,L3 : Supply to be monitored 11-14,12 : 1st C/O contact of ...
This device contrasts with an SSOLR with phase loss protection, which trips in less than 3 seconds and alerts the operator of a potential distribution system problem in advance of motor failure. Consequently, the problem does not propagate to affect other equipment on the system.
Technical Data: Phase Failure Relay ECPF03, 05, 08. Important Safety Notice . egulations and is therefore ‘fit for purpose’. Factors such as correct selection of components, cable sizing, protective devices and Earth bonding are all critical and shoul.
Function Diagrams. Phase Failure Detection (U measured < 0.7 x nominal supply voltage) Control of Overvoltage and Undervoltage. Legend. Un Nominal supply voltage. Output relay Tt Overvoltage and undervoltage threshold delay (adjustable on front panel from 0.3 to 30 s)
