MT6M15962a
1. Main power supply
© Fuji Electric Co., Ltd. All rights reserved.
1.1 Voltage range
• The collector - emitter terminal voltage (=
V
CES
) shall never exceed the absolute maximum rated
voltage (650V series = 650V, 1200V series = 1200V).
• In order to keep the maximum surge voltage between all terminals within the rated voltage during
switching operation, connect the IPM and other components as close as possible to each other and
connect a snubber capacitor between P and N
terminals. The term ‘between all terminals’ means the
terminal arrangement as shown in Table 6-1.
This chapter describes the precautions for use.
6-2
Package
Between terminals
P639, P629, P626, P630(6in1)
P636(6in1), P638
[P-(U,V,W), (U,V,W)-N]
P630(7in1)
、
P636(7in1)
、
P644
[P-(U,V,W,B), (U,V,W,B)-N]
P631(6in1)
[P1-(U,V,W), P2-(U,V,W), (U,V,W)-N1, (U,V,W)-N2]
P631(7in1)
[P1-(U,V,W,B), P2-(U,V,W,B), (U,V,W,B)-N1, (U,V,W,B)-N2]
• For P631, connect the main power supply between paired terminals (P1 and N1 or P2 and N2). Do
not connect the main power supply between unpaired terminals (P1 and N2 or P2 and N1) as this
may cause a malfunction. Connecting snubber circuits to both P1-N1 and P2-N2 is effective in
suppressing surge voltage.
Table 6-1. Terminal arrangement of each package
1.2 Measures against exogenous noise
• Although measures against exogenous noise are taken in the IPM, there is a possibility where
malfunction and breakdown are triggered by exogenous noise depending on the noise kind and
intensity. It is necessary to take sufficient measures against noise applied to the IPM.
1.2.1 Measures against noise from outside of the device
• Take measures such as installing a noise filter along the AC line and strengthening earth ground.
• Add a capacitor of <100pF between signal input line and signal GND of every phase if necessary.
• If an excessive noise voltage is applied to the alarm signal output terminal, it may cause incorrect
alarm signal output. Connect 0.2kΩ to 1kΩ resistor in series to the alarm signal output terminal if
necessary. In this case, choose the most suitable resistance value in consideration of CTR of the
optocoupler.
• To prevent noise from entering from the AC line, connect a grounding capacitor of about 4700pF
between each of the 3 phases of AC input and ground.
• Apply measures such as provision of an arrester against lightning surge.
