Baldor mn722 manual Contactor Transformer Tap Change 380 -400VAC Input

Figure 3-2 Configuring the Control Transformer for 380 - 400 VAC Installation

Contactor Transformer

Only size E and F controls require a change of the contactor transformer tap.

See Figure 3-3. Use the taps (H1 to H5) that are correct for the input voltage.

Figure 3-3 Contactor Transformer Tap Change (380 -400VAC Input)

				H5	Frequency	Voltage	Taps
		600VAC
			H4
					50 / 60	380	H1 – H2
	550VAC
					Hz	440-460	H1 – H3
	H3					550	H1 – H4
						600	H1 – H5
440VAC

H1H2

380VAC

Size G+and H control procedure: (Refer to Figure 3-4.)

Control Transformer

1.Be sure drive operation is terminated and control is disabled.

2.Remove all power sources from the control. If power has been applied, wait at least 5 minutes for bus capacitors to discharge.

3.Remove or open the front cover. Locate the control transformer fuse block (see Figure 3-1).

4.Remove the wires from the two right side terminals (460VAC connection).

5.Place the wires on the center terminals as shown (380VAC connection).

6.Install or close the front cover.

Figure 3-4 Configuring the Control Transformer Fuse Block for 380 - 400 VAC Installation

For Fuse Block, location refer to Figure 3-1.

460VAC	380-400VAC
Connection	Connection

3-14 Receiving & Installation MN722