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ABB 086348-001 with factory sealed box
MRI3 is a three phase directional time overcurrent relay with relay connection angle of 0°. The relay
input currents and their corresponding reference voltages are shown in Table 6.1 (also refer to
4.3):
If the single phase test circuit as illustrated in
Figure 6.2 is applied to test the directional feature of the relay and the current source is connected
to phase 1 current input (B3/B4), then the voltage source should be connected to relay terminals
A5/A7.
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