Hitachi SJ700-2 Ventilation fan, Inverter AcceptableUnacceptable, Loss with 100% load W, 94.8

Models: SJ700-2

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Chapter 2 Installation and Wiring

(6)Installation method and position

Install the inverter vertically and securely with screws or bolts on a surface that is free from vibrations and that can bear the inverter weight.

If the inverter is not installed vertically, its cooling performance may be degraded and tripping or inverter damage may result.

(7)Mounting in an enclosure

When mounting multiple inverters in an enclosure with a ventilation fan, carefully design the layout of the ventilation fan, air intake port, and inverters.

An inappropriate layout will reduce the inverter-cooling effect and raise the ambient temperature. Plan the layout so that the inverter ambient temperature will remain within the allowable range.

Ventilation fan

 

 

Ventilation fan

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Inverter

Inverter

(Acceptable)(Unacceptable)

Position of ventilation fan

(8)Reduction of enclosure size

If you mount the inverter inside an enclosure such that the heat sink of the inverter is positioned outside the enclosure, the amount of heat produced inside the enclosure can be reduced and likewise the size of the enclosure.

Mounting the inverter in an enclosure with the heat sink positioned outside requires an optional dedicated special metal fitting.

To mount the inverter in an enclosure with the heat sink positioned outside, cut out the enclosure panel according to the specified cutting dimensions.

The cooling section (including the heat sink) positioned outside the enclosure has a cooling fan. Therefore, do not place the enclosure in any environment where it is exposed to waterdrops, oil mist, or dust.

(9)Approximate loss by inverter capacity

Inverter capacity (kW)

5.5

7.5

11

15

18.5

22

30

37

45

55

 

 

 

 

 

 

 

 

 

 

 

Loss with 70% load (W)

242

312

435

575

698

820

1100

1345

1625

1975

 

 

 

 

 

 

 

 

 

 

 

Loss with 100% load (W)

325

425

600

800

975

1150

1550

1900

2300

2800

 

 

 

 

 

 

 

 

 

 

 

Efficiency at rated output (%)

94.4

94.6

94.8

94.9

95.0

95.0

95.0

95.1

95.1

95.1

 

 

 

 

 

 

 

 

 

 

 

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Hitachi SJ700-2 Ventilation fan, Inverter AcceptableUnacceptable, Inverter capacity kW 18.5 Loss with 70% load W, 94.8