GE Industrial Solutions ProTrip Conversion Kits AK-50, AKU-50, AKS-50, AKT-50, AK-75, and AK-100 - Manual (Page 21)

Figure 34. AK-50 & AKS-50 fourth-wire disconnect for AKD.
Figure 35. Fourth-wire disconnect for AKD-5 & AKD-6.
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