Input Transformers For 12-Pulse Rectification; 12-Pulse Rectification Effect; Braking Resistor Unit And Braking Unit - Omron SYSDRIVE 3G3HV SERIES User Manual

Installation

• Input Transformers for 12-pulse Rectification

Refer to the following table to select the input transformer for 12-pulse rectification. Refer to the mini-
mum currents on the secondary winding side in the table when selecting two standard transformers
used in combination for 12-pulse rectification.
Inverter model
3G3HV-
B2185
B2220
B2300
B2370
B2450
B2550
B2750
B4185
B4220
B4300
B4370
B4450
B4550
B4750
B411K
B416K

• 12-pulse Rectification Effect

Harmonics are suppressed effectively with 12-pulse rectification as shown in the following table.
Harmonic suppres- pp
sion method i h d
No reactor
12-pulse rectification 5.43
H Braking Resistor Unit and Braking Unit
• Connect the Braking Resistor Unit and Braking Unit to the Inverter as shown in the following.
• Set n079 to 0 (i.e., no overheating protection of the Braking Resistor Unit) and n070 to 0 (i.e., no decel-
erating stall prevention) before using the Inverter with the Braking Resistor Unit connected.
Note 1. Set n079 to 0 before operating the Inverter with the Braking Resistor Unit without thermal
relay trip contacts.
Note 2. The Braking Resistor Unit cannot be used and the deceleration time cannot be shortened by
the Inverter if n070 is set to 1 (i.e., decelerating stall prevention).
• To prevent the Unit from overheating, make a power supply sequence as shown below or connect the
thermal relay trip output of the Unit to the remote error input terminal of the Inverter to interrupt the
operation of the Inverter.
• The Braking Resistor Unit or Braking Unit cannot be connected to the Inverter with an output of
18.5 kW to 160 kW.
2-32
Input voltage (V)
I/O voltage ratio: 1:1 g
200 to 230 V ±10%/
V
200 to 230 V ±10% at 200 to 230 V ±10% at
50/60 Hz 50/60 Hz
I/O voltage ratio: 1:1 g
380 to 460 V ±10%/
V
380 to 460 V±10% at 380 to 460 V±10% at
50/60 Hz 50/60 Hz
5th har- 7th har-
monic monic harmon-
65 41 8.5
5.28 5.40
Minimum current on
the primary winding
side (A)
100
/
120
164
200
230
280
380
52
/
66
82
100
120
180
206
280
380
Harmonic generation rate (%)
11th 13th 17th
harmon- harmon-
ic ic ic
7.7 4.3
5.96 0.69
Chapter 2
Minimum current on
the secondary winding
side (A)
50
60
82
100
115
140
190
26
33
41
50
60
80
103
140
190
19th 23th
harmon- harmon-
ic ic monic
3.1 2.6 1.8
0.19 1.49 1.18
25th
har-