Baldor mn722 manual Power Disconnect, Internal Fuses, Size Board Rating Type

Protection Devices Be sure a suitable input power protection device is installed. Use the recommended circuit breaker or fuses listed in Table 3-5 and 3-6. Input and output wire size is based on the use of copper conductor wire rated at 75 ° C. The table is specified for NEMA B motors.

Circuit Breaker:	3 phase, thermal magnetic.
	Equal to GE type THQ or TEB for 230 VAC or
	GE type TED for 460 VAC
Fast Action Fuses:	230	VAC, Buss KTN
	460	VAC, Buss KTS to 600A (KTU 601 - 1200A)
Very Fast Action:	230	VAC, Buss JJN
	460	VAC, Buss JJS
Time Delay Fuses:	230	VAC, Buss FRN
	460	VAC, Buss FRS to 600A (KLU 601 - 1200A)

Power Disconnect

A power disconnect should be installed between the input power service and the control for a fail safe method to disconnect power. The control will remain in a powered-up condition until all input power is removed from the control and the internal bus voltage is depleted.

Internal Fuses

				Table 3-4		Internal Fuses
	Zero Crossing		Filter Fuses			Control		Soft Start		Fan Control
Control	(Input Interface
			(Filter Board)			Transformer		Transformer		Transformer
Size	Board)
	Rating	Type	Rating		Type	Rating	Type	Rating	Type	Rating	Type
	3/10 A	FLQ-	5A		FNQ-5 or	3.2A	MDA-
C+		3					2
	500VAC	/10 or	500VAC		Equiv.	250VAC	3 /10 or
		Equiv.					Equiv.
	3/10 A	FLQ-	5A		FNQ-5 or	3.2A	MDA-
D+		3					2
	500VAC	/10 or	500VAC		Equiv.	250VAC	3 /10 or
		Equiv.					Equiv.
	3/10 A	FLQ-	10A		KTK-10	3.2A	MDA-
D		3					2
	500VAC	/10 or	600VAC		or Equiv.	250VAC	3 /10 or
		Equiv.					Equiv.
	3/10 A	FLQ-	10A		KTK-10	3.2A	MDA-	1/2 A	ABC 1/2
E		3					2
	500VAC	/10 or	600VAC		or Equiv.	250VAC	3 /10 or	250VAC	or Equiv.
		Equiv.					Equiv.
F	3A	ATM-3	3A		KTK-3 or	3A	KTK-3 or	3A	KTK-3 or
	600VAC	or Equiv.	500VAC		Equiv.	600VAC	Equiv.	600VAC	Equiv.
			50A		JJS or	31/2 A	FNQ-	4A	FNQ-4 or	3A	FNQ-3 or
							1
G+ 250HP			600VAC		Equiv.	500VAC	3 /2 or	500VAC	Equiv.	500VAC	Equiv.
							Equiv.
			50A		JJS or	31/2 A	FNQ-	4A	FNQ-4 or	3A	FNQ-3 or
							1
G+300HP			600VAC		Equiv.	500VAC	3 /2 or	500VAC	Equiv.	500VAC	Equiv.
							Equiv.
			60A		JJS or	31/2 A	FNQ-	4A	FNQ-4 or	3A	FNQ-3 or
							1
G+350HP			600VAC		Equiv.	500VAC	3 /2 or	500VAC	Equiv.	500VAC	Equiv.
							Equiv.
			70A		JJS or	31/2 A	FNQ-	4A	FNQ-4 or	3A	FNQ-3 or
							1
G+400HP			600VAC		Equiv.	500VAC	3 /2 or	500VAC	Equiv.	500VAC	Equiv.
							Equiv.
			70A		JJS or	31/2 A	FNQ-	4A	FNQ-4 or	3A	FNQ-3 or
							1
G+450HP			600VAC		Equiv.	500VAC	3 /2 or	500VAC	Equiv.	500VAC	Equiv.
							Equiv.

Not applicable.

3-8 Receiving & Installation MN722