CHAPTER 10 PERIPHERAL EQUIPMENT
10-18 AC Reactor
10
Harmonics suppression measures
1. All servo amplifier models are applicable to the "guideline of harmonics suppression measures for
high voltage or extra high voltage consumers" if they are used at a specific consumer. If you are a
consumer to whom the guideline is applicable, calculate the equivalent capacity and harmonics
outflow current and, if the harmonics current exceeds the limit predetermined for the contract
wattage, take adequate countermeasures. (For details, refer to JEM-TR225.)
2. The servo amplifier was excluded from the target of "guideline of harmonics suppression
measures for electric appliances and general-purpose products" in January 2004. However,
JEMA prepares a JEMA technical document in the view point of educating general harmonics
suppression measures. It is recommended to take harmonics suppression measures of the
discrete device as far as possible. (For details, refer to JEM-TR227.)
Source: The Japan Electrical Manufacturers' Association (JEMA)
Limitations set in the guideline for harmonics suppression measures are satisfied if the servo
amplifier is connected with an AC reactor.
How to connect the AC reactor
Connect in the primary circuit of the servo amplifier as shown in the figure below.
L1
L2
L3
商用電源
三相200V
サーボアンプ
X
Y
Z
U
V
W
ACリアクトル
Purpose of AC reactor
(1) Improvement of input power
factor
(2) Protection against imbalance
in voltage or similar
(3) Harmonics suppression
(4) Suppression of power supply
capacity
Commercial power supply
3-phase 200 V
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