Toshiba VF-AS1 instruction manual E6581301

! E6581301!

■Calorific values of the inverter and the required ventilation

The energy loss when the inverter converts power from AC to DC and then back to AC is about 5%. In order to suppress the rise in temperature inside the cabinet when this loss becomes heat loss, the interior of the cabinet must be ventilated and cooled.

The amount of forced air-cooling ventilation required and the necessary heat exchange surface area when operating in a sealed cabinet according to motor capacity are as follows.

				Part of inside	Amount of forced	Heat exchange surface
	Voltage	Applicable Motor	Calorific values	calorific values	air cooling ventilation	area required for sealed
	class	(kW)	(W)	(W)	required	storage cabinet
1				(note3)	(m3/min)	(m2)
		0.4	50	25	0.29	1.0
		0.75	70	28	0.40	1.4
		1.5	113	32	0.65	2.3
		2.2	135	39	0.78	2.7
		3.7/4.0	191	40	1.1	3.8
		5.5	307	60	1.8	6.2
		7.5	408	72	2.4	8.2
	200V	11	593	83	3.4	11.9
		15	692	91	4.0	13.9
		18.5	800	120	4.6	16.0
		22	865	124	5.0	17.3
		30	1140	152	6.6	22.8
		37	1340	167	7.7	26.8
		45	1570	185	9.0	31.4
		55	1720	154	9.9	34.4
		75	2210	154	12.7	44.2
		0.75	57	28	0.33	1.2
		1.5	82	30	0.47	1.7
		2.2	112	33	0.64	2.3
		3.7/4.0	136	41	0.78	2.8
		5.5	262	58	1.5	5.3
		7.5	328	66	1.9	6.6
		11	448	77	2.6	9.0
		15	577	104	3.3	11.6
		18.5	682	106	3.9	13.7
		22	720	111	4.2	14.4
		30	980	134	5.6	19.6
		37	1180	138	6.8	23.6
	400V	45	1360	165	7.8	27.2
		55	1560	179	9.0	31.2
		75	2330	226	13.4	46.6
		90	2410	237	13.8	48.2
		110	2730	261	15.6	54.6
		132	3200	296	18.3	64.0
		160	3820	350	21.9	76.4
		200	4930	493	28.2	98.6
		220	5405	586	30.9	108.1
		280	6830	658	39.1	136.6
		355	7960	-	45.5	159.2
		400	9300	-	53.2	186.0
		500	11400	-	65.2	228.0

Note1: The heat loss for the optional external devices (input reactor, DC reactor, radio noise reduction filters, etc.) is not included in the calorific values in the table. With the exception of inverters ￿￿￿￿￿￿￿￿￿￿ for motors with capacities of 355kW and more, in which case the calorific value of the DC reactor is included.

Note2: Each calorific value in the table refers to the quantity of heat that an inverter produces when it is operated continuously at the factory default ￿￿ (carrier frequency) under a load factor of 100%.

Note3: This value is power dissipated inside the enclosure ￿￿￿￿ using heatsink ￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿￿option.

A-28