Mitsumi electronic FR-F520-0.75K, 55K instruction manual Equivalent Capacity Limits

INSTALLATION AND WIRING

Table 3 Equivalent Capacity Limits

Received Power Voltage	Reference Capacity
6.6kV	50kVA
22/33kV	300kVA
66kV or more	2000kVA

Table 4 Harmonic Content (Values at the fundamental current of 100%)

Reactor	5th	7th	11th	13th	17th	19th	23rd	25th
Not used	65	41	8.5	7.7	4.3	3.1	2.6	1.8
Used (AC side)	38	14.5	7.4	3.4	3.2	1.9	1.7	1.3
Used (DC side)	30	13	8.4	5.0	4.7	3.2	3.0	2.2
Used (AC, DC sides)	28	9.1	7.2	4.1	3.2	2.4	1.6	1.4

1) Calculation of equivalent capacity (P0) of harmonic generating equipment

The “equivalent capacity” is the capacity of a 6-pulse converter converted from the capacity of consumer’s harmonic generating equipment and is calculated with the following equation. If the sum of equivalent capacities is higher than the limit in Table 3, harmonics must be calculated with the following procedure:

P0 = Σ (Ki ⋅ Pi) [kVA]	* Rated capacity: Determined by the
Ki: Conversion factor (refer to Table 2)	capacity of the applied motor and found
Pi: Rated capacity of harmonic generating equipment* [kVA]	in Table 5. It should be noted that the
i: Number indicating the conversion circuit type	rated capacity used here is used to
	calculate generated harmonic amount
	and is different from the power supply

capacity required for actual inverter
drive.	2
2) Calculation of outgoing harmonic current
Outgoing harmonic current = fundamental wave current (value converted from received power voltage) ⋅
operation ratio ⋅ harmonic content

•Operation ratio: Operation ratio = actual load factor ⋅ operation time ratio during 30 minutes

•Harmonic content: Found in Table 4.

Table 5 Rated Capacities and Outgoing Harmonic Currents for Inverter Drive

			Fundamental
Applied	Rated Current [A]		Wave Current	Rated		Fundamental Wave Current Converted from 6.6kV
Motor			Converted	Capacity			(No reactor, 100% operation ratio)
(kW)			from 6.6kV
	200V	400V	(mA)	(kVA)	5th	7th		11th	13th	17th	19th	23rd	25th
0.75	2.74 (Note)	1.37	83	0.97	53.95	34.03		7.055	6.391	3.569	2.573	2.158	1.494
1.5	5.50 (Note)	2.75	167	1.95	108.6	68.47		14.20	12.86	7.181	5.177	4.342	3.006
2.2	7.93 (Note)	3.96	240	2.81	156.0	98.40		20.40	18.48	10.32	7.440	6.240	4.320
3.7	13.0 (Note)	6.50	394	4.61	257.1	161.5		33.49	30.34	16.94	12.21	10.24	7.092
5.5	19.1	9.55	579	6.77	376.1	237.4		49.22	44.58	24.90	17.95	15.05	10.42
7.5	25.6	12.8	776	9.07	504.4	318.2		65.96	59.75	33.37	24.06	20.18	13.97
11	36.9	18.5	1121	13.1	728.7	459.6		95.29	86.32	48.20	34.75	29.15	20.18
15	49.8	24.9	1509	17.6	980.9	618.7		128.3	116.2	64.89	46.78	39.24	27.16
18.5	61.4	30.7	1860	21.8	1209	762.6		158.1	143.2	79.98	57.66	48.36	33.48
22	73.1	36.6	2220	25.9	1443	910.2		188.7	170.9	95.46	68.82	57.72	39.96
30	98.0	49.0	2970	34.7	1931	1218		252.5	228.7	127.7	92.07	77.22	53.46
37	121	60.4	3660	42.8	2379	1501		311.1	281.8	157.4	113.5	95.16	65.88
45	147	73.5	4450	52.1	2893	1825		378.3	342.7	191.4	138.0	115.7	80.10
55	180	89.9	5450	63.7	3543	2235		463.3	419.7	234.4	169.0	141.7	98.10

Note: When a motor of 3.7kW or less capacity is driven by a transistorized inverter of more than 3.7kW. For example, when a 3.7kW or less motor is driven by a 5.5kW transistorized inverter, the transistorized inverter is not the target of the household appliances/general-purpose products guideline, but because they must be included in the calculation of the harmonic current of the guideline, the fundamental wave input currents are indicated.

3)Harmonic suppression technique requirement

If the outgoing harmonic current is higher than; maximum value per 1kW (contract power) ⋅ contract power, a harmonic suppression technique is required.

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