Cover Removal To connect power and signal wires, the cover must be removed. This procedure describes how to access all terminal connections inside the control.
Using your thumbs, press in and slide the cover down as shown in Figure
Figure 3-2 Top Cover Removal
1. Press in to release cover
2. Slide cover down and remove.
Power Conditioning
System Grounding Baldor Controls are designed to be powered from standard three phase power lines that are electrically symmetrical with respect to ground. System grounding is an important step in the overall installation to prevent problems.
Ungrounded Distribution System
With an ungrounded power distribution system it is possible to have a continuous current path to ground through the MOV devices. To avoid equipment damage, an isolation transformer with a grounded secondary is recommended. This provides three phase AC power that is symmetrical with respect to ground.
Input Power Conditioning
Baldor controls are designed for direct connection to standard three phase lines that are electrically symmetrical with respect to ground. Certain power line conditions must be avoided. An AC line reactor or an isolation transformer may be required for some power conditions.
SIf the feeder or branch circuit that provides power to the control has permanently connected power factor correction capacitors, an input AC line reactor or an isolation transformer must be connected between the power factor correction capacitors and the control.
SIf the feeder or branch circuit that provides power to the control has power factor correction capacitors that are switched on line and off line, the capacitors must not be switched while the control is connected to the AC power line. If the capacitors are switched on line while the control is still connected to the AC power line, additional protection is required. TVSS (Transient Voltage Surge Suppressor) of the proper rating must be installed between the AC line reactor or an isolation transformer and the AC input to the control.
MN735 | Receiving & Installation |
