Reflash Instructions - Baldor Reliance CDX7150 Installation & Operating Manual

Reflash Instructions

These generators are self−exciting. If voltage will not build up, it is possible the residual magnetism is
insufficient to initiate excitation. This procedure is to restore sufficient residual magnetism to self excite.
Note: Loss of residual magnetism can be caused by misconnection (reversing the connections) of F1 and
F4.
1. Disconnect F1 and F4. All other leads may remain connected.
2. Connect 24 to 40VDC power source positive lead to F1 and negative to F4.
DC source may be batteries, a DC welder (not AC) or rectified AC.
3. Drive generator at rated RPM.
4. Measure the voltage across A1 and A2. Voltage should be 150 to 200% of F1 to F4 voltage. When
A1 to A2 voltage level reaches this level (approximately 30 seconds) carefully remove the source
leads, an arc may be present during disconnect.
5. Stop the generator.
6. Reconnect F1 and F4 as shown in the DC Generator Connection Diagram. Rotation is viewed from
opposite drive end (commutator end) A1 is positive for CCW rotation. A2 is positive for CW rotation.
S1 is always negative.
MN605
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Instructions to reflash the residual magnetism for Lifting Magnet Generators only.
Shunt Fields
COMM Field
ARM
Shown for CCW (counterclockwise) rotation, (viewed from opposite drive end or
commutator end). For CW (clockwise) rotation, interchange leads A1 and A2.
DC Generator Connection Diagram
Compound Wound Short Shunt Connection
Series Field
Maintenance & Troubleshooting 3-11