4 System Design
4 - 28
OMNUC G5-series (Pulse-train Input Type) AC Servomotors and Servo Drives User’s Manual
• Use surge absorbers to absorb lightning surge voltage and abnormal voltage from power supply input
lines.
• When selecting surge absorbers, take into account the varistor voltage, the surge immunity and the
energy tolerated dose.
• For 200-VAC systems, use surge absorbers with a varistor voltage of 620 V.
• The surge absorbers shown in the following table are recommended.
Note 1 Refer to the manufacturers’ catalog for operating details.
2 The surge immunity is for a standard impulse current of 8/20 s. If pulses are wide, either decrease the
current or change to a larger-capacity surge absorber.
External Dimensions
Equalizing Circuits
Surge Absorber
Manufacturer Model Surge immunity Type Comment
Okaya Electric
Industries Co., Ltd.
R·A·V-781BWZ-4 700 V ± 20% 2,500 A Block Single-phase
200 VAC
Okaya Electric
Industries Co., Ltd.
R·A·V-781BXZ-4 700 V ± 20% 2,500 A 3-phase 200 VAC
1 2 3
28
4.5
28.5 11
5.5
φ4.2
41
200
For 3-phase (BXZ series)
For single-phase (BWZ series)
21
28
4.5
28.5 11
5.5
φ4.2
41
200
For 3-phase (BXZ series)
For single-phase (BWZ series)
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