Baldor MN850 manual In-Delta Soft-Start Connections, Baldor Digital

In–Delta Connections For Delta connected motors, the Soft–Start can be connected inside the delta windings. This connection method is shown in Figure 2-2.

			Figure 2-2		In–Delta Soft–Start Connections
	L1	L2	L3					L1	L2	L3
				Earth
Note 1	* Circuit						Alternate *
				Note 2			Fuse			Note 1
	Breaker
							Connection
							* Optional components not provided with control.
Note 3, 9
	L1	L2	L3
					X1	115/230VAC
					X2		In–Delta connections for correct motor rotation
		Baldor				Note 6, 7
		Digital					Soft–Start	Motor
		Soft–Start
							Terminal	Terminal
	T1	T2	T3				T1	T3
							T2	T1
							T3	T2
		T1					L1	T5
		T3	T2				L2	T6
	* AC Motor		G				L3	T4
		T5	T4
		T6
Note 8

See Recommended Tightening Torques in Table 2-4.

Notes:

1.See “Protective Devices” described previously in this section.

2.Use same gauge wire for Earth ground as is used for L1, L2 and L3.

3.Metal conduit should be used. Connect conduits so the use of a Reactor or RC Device does not interrupt EMI/RFI shielding.

4.Derating factor for soft–start is 57%.

5.Parameter P6– Firing Mode must be set to 1.

6.X1 and X2 control terminal power must be present or the logic circuits will not work. Either 115VAC or 230VAC can be used. Be sure the 115/230VAC switch (Control Voltage Selector Switch) is set to the proper voltage before you apply power.

7.The X1 and X2 control voltage input has different VA ratings depending on enclosure size, see Table 2-3.

8.For reversing operation, L1 and L2 should be switched. Reversing any two of the three input phases will reverse the motor rotation.

9.To protect the control, be sure to add MOV protection. Refer to Appendix D for additional information.

Fan Connections – Size 3 and 4 only Size 1 and 2 controls do not have fan connections. For Size 3 controls make the fan connections as shown in Figure 2-3.The Fan and Control voltages must be the same (both must be 115VAC or both must be 230VAC). 150VA (minimum) required.

Figure 2-3 Fan Connections

115V Connections 230V Connections

X1 X2 (150VA minimum) X1 X2

MN850 Installation 2-7