10-6
MHT260a (Engl.)
10.5 AC reactor (reactor for impedance matching)
(1) AC reactor application
Provide and connect an AC reactor in any of the following cases.
(a) Power supply capacity is large
When the power supply capacity exceeds 500 [kVA] (*), the input current of the amplifier becomes large at the time of power on, and there is
a possibility where the rectifying diodes of the amplifier are damaged.
Note : (*) Cable length of 20 [m] with specified cable diameter size.
(b) Power supply voltage is unbalanced
Connect an AC reactor if the power supply voltage unbalance rate is 3% or higher.
Unbalance rate of power supply voltage [%] = × 100
(c) Suppression of higher harmonics
Higher harmonics current is generated because an amplifier is of capacitor input type.
AC reactor suppresses voltage distortion in the power supply system.
(2) Connection
Connect an AC reactor to the primary (power supply) side of the amplifier.
Input voltage class [V] 100 200
Amplifier output [kW] 0.05 to 0.2 0.03 to 0.2 0.4 0.75 1, 1.5 2 3 4 5
□□□6 □□□Amplifier type RYS□□□S3-
500 to 201 300 to 201 401 751 102, 152 202 302 402 502
AC reactor type ACR2- 0.4A 0.4A 0.75A 1.5A 2.2A 3.7A 5.5A 7.5A 11A
reactance [mH] 2.92 1.57 0.939 0.679 0.406 0.279 0.207 0.145
10.6 External braking resistor : External dimension : Refer to 10.8 (3)
A braking resistor is provided (built-in) with the amplifier for 0.2 [kW] over.
However, if load variation is wide, elevation (hoisting) load, or higher frequent operation, the following external braking resistor should be
installed. In such a case, built-in resistor should be disconnected.
(1) Data of external braking resistor
Input voltage class [V] 100 200
Amplifier output [kW] 0.05, 0.1 0.2 0.03 to 0.2 0.4 0.75 1, 1.5 2, 3 4, 5
Amplifier type RYS□□□S3- □□□6 □□□
500, 101 201 300 to 201 401 751 102, 152 202, 302 402, 502
Resistor type WSR-401 WSR-751 WSR-152 DB11-2 DB22-2
(**) [W] 17 25 75 115
Resistance [Ω]68 15 10 5.8
Built-in resistor (**) [W] 12 12 20 30 60
[Ω]
Not
applicable
68
Not
applicable
68 33 18 9 5.5
Note : (**) Cont. : Continuous operation duty at 25℃, allowable
(2) Data of NTC thermistor embedded in the external braking resistor
Resistor type Open circuited the thermistor at
the following temperature [℃]
Withstand AC voltage tested
for one minute [kV]
Contact capacity
WSR- 401 135 ± 5 1.5 30 [V] DC, 0.1 [A]
751 2.5
152 150 ± 10
DB 11-2
22-2
120 [V] AC/30 [V] DC, 0.1 [A]
Max. voltage [V]−Min. voltage [V]
3-phase average voltage [V]
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