D64RPB100 SERIES B1 DIGITAL GROUND FAULT RELAY
■The D64RPB100 is a microprocessor based ground fault relay for use on solidly grounded or resistance grounded systems. This innovative digital electronic relay measures ground fault current using a built-in 1.8T zero sequence current transformer (CT).
■The D64RPB100 reacts to alternating current only and will reject direct current signals. It will maintain accuracy over a frequency range of 40 to 450 Hz., making it suitable for variable frequency drive applications.
■660 Volts is the maximum system operating voltage for the D64RPB100 when passing the system power conductors through the built-in CT. However, by using any Eaton's Cutler-Hammer C311CT 500:1 ratio CT and connecting the secondary to CT input terminals T1 & T2 or, by using any suitably rated, commercially available, interposing CT with 5 Amp secondary, and passing the secondary lead through the built-in CT, the relay can be used on any system voltage.
■The ground fault current trip level is set on a front accessible binary DIPswitch array. Using the built-in 1.8T CT or, by using any Cutler-Hammer C311CT 500:1 ratio CT and connecting the secondary to CT input terminals T1 & T2, trip currents from 30 milliamps - 9 Amps can be selected in 14 discrete steps. By using an interposing CT with 500:5 ratio, the trip current settings become 3 - 900 Amps. Or, by using an interposing CT with 5000:5 ratio, the trip current settings become 30 - 9000 Amps. The trip level can be set just above the charging current1. Any deterioration in the circuit will trip the relay. This also permits scheduled field testing of the relay (by lowering the trip level).
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User's Guide |
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Please see the document for details |
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English Chinese Chinese and English Japanese |
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2019/9/6 |
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Revision 3 |
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275 KB |
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