enclosure heat exchangerheat exchange in the radiation ﬁn 1) heated air inside an enclosure...

Enclosure heat exchanger

Lower the temperature of an enclosure interior

without allowing entry of heat, dust and moisture

https://www.ohm.jp/

Features

1) Versatile lineup

2) Keep air cleanBOXFAN brings interior temperature close to outside air effectively while keeping dust and mist away.

To meet customers’ demand for global usage,BOXFAN Standard series and OC-153H-A** are UL-listed and CE series is CE-marked.

3) Worldwide use

Avaialble from Standard, Compact and CE-marked series

Operating principle

Heat exchange in the Radiation fin

1) Heated air inside an enclosure circulates as pictured right to transfer heat to the radiation fin.2) Cool air outside an enclosure circulates to take away heat from the fin to the outside.The above cycle is repeated and the internal air temperaturefalls to near the external air temperature.

BOXFAN’s radiation fin is specially designed so as hot internal air and cold external air flows in the opposite direction in adjacentfins. Thus, efficient heat exchange takes place.

Internal airExternal air

Radiation fin

Heated air

Outer air

ex. internal mounting

– 1 –

Application examples

Site of use

Electrical connection of terminal block

Mounting

For control panels of NC machines, robots, measuring instrument and distribution panels

NC machine toolsWelding robotsElectric discharge machines Power electronics

Machining plant Welding shop Spinnery Foundry Sheet-metal plant Paper mill

Do not expose to direct sunshine or rain.

Internal lateral mounting External lateral mounting

Note : Mounting cutouts differ by type of mounting.

Terminal block (with terminal cover)

Notes: 1. Supply voltage should be as specified on the rating plate.

2. Use crimp terminals with insulation cap for power connection.

3. OC-201L, OC-0810HIL and OC-0820HIL are equipped with a power code. 4. Average tightening torque is 1.4N・m(14kgf・cm). 5. M4 screws are used in the terminal block.

OC-15-A※※ OC-15S-A※※

Power Earth

UL-listed standard models for wide application■ How to see model

1 ：Working voltage 100V AC

2 ：Working voltage 200V AC

OC-□□□-A□00

■ SpecificationsModel Rated capactiy W/K (※1） Rated voltage

（※2）Current consumption Power consumption

50Hz 60Hz 50Hz 60Hz 50Hz 60Hz

OC-15-A100

OC-17-A100

8 10 6.2kg

Single phase 100-120VACSingle phase200-230VAC

Single phase100-120VACSingle phase200-230VACSingle phase100-120VACSingle phase200-230VACSingle phase100-120VACSingle phase200-230VAC


Single phase100-120VACSingle phase200-230VAC

Single phase100-120VACSingle phase200-230VAC

0.50A 0.45A44W 42W 2

OC-17-A200 0.25A 0.23A

OC-12-A100

10 12 5.8kg0.5A 0.45A

44W 42W 2OC-12-A200 0.25A 0.23A

OC-15-A100

10 12 6.1kg0.50A 0.45A

44W 42W 2OC-15-A200 0.25A 0.23A

OC-28-A100

16 20 10.7kg1.00A 0.90A

88W 84W 4OC-28-A200 0.50A 0.45A

OC-31-A100

16 20 11.0kg1.00A 0.90A

88W 84W 4OC-31-A200 0.50A 0.45A

OC-30-A100

25 30 12.5kg1.40A 1.20A

100W 90W 2OC-30-A200 0.70A 0.60A

OC-20-A100

34 43 14.4kg1.40A 1.20A

100W 90W 2OC-20-A200 0.70A 0.60A

OC-37-A100

35 42 16.1kg2.80A 2.40A

200W 180W 4OC-37-A200 1.40A 1.20A

OC-40-A100

60 80 27.6kg

2.80A 2.40A

200W 180W 4OC-40-A200

1.40A 1.20A

（※1） Rated capacity means nominal cooling capacity when temperature difference between inside and outside the enclosure is 20K.（※2） These units are designed for100VAC or 200VAC single phase voltage supplies.

For different voltage specifications, please consult us.

– 3 –

Standard Series

Nil : Internal wall mountingS : External wall mountingSeries model BOX FAN

Connection Weight No. of fan motors

Screw terminal block

Internal lateral mounting

■ Specifications

OC-15S-A100

OC-17S-A100

8 10 6.2kg 0.50A 0.45A

44W 42W 2OC-17S-A200

0.25A 0.23A

OC-12S-A100

10 12 5.8kg

0.5A 0.45A

44W 42W 2OC-12S-A200

0.25A 0.23A

OC-15S-A100

10 12 6.1kg

0.50A 0.45A

44W 42W 2OC-15S-A200

0.25A 0.23A

OC-28S-A100

16 20 10.7kg

1.00A 0.90A

88W 84W 4OC-28S-A200 0.50A 0.45A

OC-31S-A100

16 20 11.0kg

1.00A 0.90A

88W 84W 4OC-31S-A200 0.50A 0.45A

OC-30S-A100

25 30 12.5kg

1.40A 1.20A

100W 90W 2OC-30S-A200

0.70A 0.60A

OC-20S-A100

34 43 14.5kg

1.40A 1.20A

100W 90W 2OC-20S-A200

0.70A 0.60A

OC-37S-A100

35 42 16.1kg2.80A 2.40A

200W 180W 4OC-37S-A200

1.40A 1.20A

OC-40S-A100

60 80 28.3kg

2.80A 2.40A

200W 180W 4OC-40S-A200

1.40A 1.20A

（※1） Rated capacity means nominal cooling capacity when temperature difference between cabinet and out air is 20K.（※2） Please use it with single phase AC100, AC200V.

For different voltage specifications, please consult us.

– 4 –


External Lateral Mounting

Single phase100-120VACSingle phase200-230VACSingle phase100-120VACSingle phase200-230VAC

Single phase100-120VACSingle phase200-230VACSingle phase100-120VACSingle phase200-230VACSingle phase100-120VACSingle phase200-230VACSingle phase100-120VACSingle phase200-230VAC


Model Rated capactiy W/K (※1） Rated voltage（※2）

Current consumption Power consumption50Hz 60Hz 50Hz 60Hz 50Hz 60HzConnection Weight No. of

fan motors

●AccessoriesFilter guard（OG-17FAN） • • 1Fin guard（OG-17FIN） • • • • 1Filter（OF-S1） • • • • • • • • • • 1

●AccessoriesFilter guard（OG-12FAN） • • 1

●Accessories

●Accessories

●Accessories

Packing

InternalAIR

ExternalAIR

Terminal block1637

1566

4

100

139.5

116

160

200

53

58

480

19

15

450

75

464

14

116

119.5

4-φ5.5 or M5 stud bolt

External air

Terminal blockInternalair

Packing

4

16 2260

680

58

56

664

182

75

277

116

14

100

140

116

170 19

650

15

15


InternalAIR

ExternalAIR

Packing

Terminal block

90 15 19 150

574

80

590

15

560

162

14

116

207

75

116

110

4

60

58

18.5 16

4-φ

Packing

19 280

110 20

15

560

200

574

90

590

110

15

18.5 16

51

58

4

116 11614

162

14

116

207

75


Internalair

Externalair

Externalair

Internalair

Packing

Terminal block

Terminal block

221615

4

280

116116 24

680

310

56

58

19 200

664

650

15

60

182

14

116

277

75


OC-17-A100OC-17-A200

OC-12-A100OC-12-A200

OC-15-A100OC-15-A200

OC-28-A100OC-28-A200

OC-31-A100OC-31-A200

– 5 –

Internal lateral mountingOutline drawing Mounting cutoutSpecifications

Rated capacity (W/K)

Mounting cutouts shows the view from the direction of arrow


Fin guard（OG-12FIN） • • • • 1Filter（OF-S1） • • • • • • • • • • 1


Filter guard（OG-15FAN） • • 1Fin guard（OG-15FIN） • • • • 1Filter（OF-S1） • • • • • • • • • • 1

5.5 or M5 stud bolt


Filter guard（OG-28FAN） • • 2Fin guard（OG-28FIN） • • • • 1Filter（OF-S1） • • • • • • • • • • 2


Filter guard（OG-31FAN） • • 2Fin guard（OG-31FIN） • • • • 1

Filter（OF-S1） • • • • • • • • • • 2

Standard Series


External air

External air

External air

External air

Internal air

Internal air

Terminal block

Terminal block

Packing

36

58

170

260

630

10

638

19300

650

12

207

200

9015

150

75

194

4616


Internal air

Internal air

Packing

15

630

19

170

644

160

100200

660

160

10216

69

58

95

15

150

309

75

4

4-φ

Terminal block

Terminal block

Packing

16 46

4

4

638

36

19382

650

12

207

200

340

170 17014

11

628

15 90

58

150

75

194

4-φ 5.5 or M5 stud bolt

Packing

16038160

19

17028170

150

309

75

240

95

15

644

160

400

660

16 102 4

58

69

632

14


OC-30-A100OC-30-A200

OC-20-A100OC-20-A200

OC-37-A100OC-37-A200

OC-40-A100OC-40-A200

– 6 –



5.5 or M5 stud bolt

AccessoriesFilter guard（OG-30FAN） • • 1

Fin guard（OG-30FIN） • • • • 1

Filter（OF-S2） • • • • • • • • • 1

• • 1

• • • • 1

• • • • • • • • • 1


AccessoriesFilter guard（OG-20H FAN)Fin guard（OG-20H FIN)

Filter（OF-S2）


AccessoriesFilter guard（OG-37FAN） • • 2Fin guard（OG-37FIN） • • • • 1Filter（OF-S2） • • • • • • • • • • 2


AccessoriesFilter guard（OG-40H FAN) • • 2

Fin guard（OG-40H FIN) • • • • 2

Filter（OF-S2） • • • • • • • • • • 2

Outline drawing Mounting cutoutSpecifications

External lateral mounting

Standard SeriesMounting cutouts shows the view from the direction of arrow

Filter（OF-S1)

650

680

170

15

4 1560

16 7

100

14

116

277

75

53

78

51

40 40

140

116

664

71

58

19


Filter（OF-S1)19

450

15

51

58

1566

169.5

160

100

116

30

139.5

32

80

200

480

61.5

4

75

464

14

116

119.5

4-φ5.5 orM5 stud bolt

Filter（OF-S1） 46 46

80

574

70

40

52

58

590

80

15

560

1504 90 15

16

71.5

19

110

11675

14

116

207


Filter(OF-S1)

Packing

71.5

58

52

40

70

574

590

111111

110 11020

200

80

15

560

28015904

16

19

116 11614

75

14

116

207


Packing

Filter(OF-S1)19

650

15

65

78

200

40 110

664

24116 116

310

680

716

58

83

154 60

280

39

14

116

277

75


OC-17S-A100OC-17S-A200

OC-12S-A100OC-12S-A200

OC-15S-A100OC-15S-A200

OC-28S-A100OC-28S-A200

OC-31S-A100OC-31S-A200

– 7 –


AccessoriesFilter guard（OG-17FAN） 1


AccessoriesFilter guard（OG-12FAN） 1


Accessories　Filter guard (OG-15FAN ) 1





Standard Series

External air

External air

External air

External air

External air

Terminal block

Terminal block

Internalair

Internalair

Internalair

Internalair

Internalair

Packing

Packing

Terminal block

Terminal block

Terminal block

Packing



Terminal block

Terminal block

Terminal block

Terminal block

Internalair

Internal air

Internal air

Internal air

Externalair

Packing

Filter(OF-S2)

4

170

630

10

84

90 15

19 121 12158

650

12

207

200

260

88

40

78

300

66

638

16

75

150


Filter(OF-S2)External air

External air

External air

Packing

100

160

698

170

35

40

74 78

75

309

150

15

71

200

714

32

667

4 160 15

16

100

58 7119


Filter(OF-S2)

Packing

170

207

84

16

19

1590

628

11

340

650

382 200

12

170

88

40

66

14

78

58

638

162162

150

75


Filter(OF-S2)

Packing

19

100

16

154

667

32 119 58

13

35

28 170170

74

40

78

16038160

75

309

150

240

15

698

400

714

160


OC-30S-A100OC-30S-A200

OC-20S-A100OC-20S-A200

OC-37S-A100OC-37S-A200

OC-40S-A100OC-40S-A200

– 8 –

External lateral mountingMounting cutouts shows the view from the direction of arrow


AccessoriesFilter guard（OG-30FAN) 1


Accessories

Filter guard（OG-20H FAN) 1

Accessories


Filter guard（OG-37FAN) 2


AccessoriesFilter guard（OG-40H FAN) 2

– 9 –

CE-marked models


Current consumption Power consumption50Hz 60Hz 50Hz 60Hz 50Hz 60Hz

Connection Weight No. of fan motors


Specifications



External lateral m

ounting

(*1) Rated capacity means nominal cooling capacity when temperature difference between enclosure interior and outer air is 20K.(*2) Use only within the range of 200 to 230VAC, single phase.



AccessoriesFilter guard

Fin guard

Filter

AccessoriesFilter guard

Fin guard

Filter

CE Series


5.8kg

10.7kg

16.1kg

5.8kg

10.7kg

16.1kg

200-230VAC 0.20-0.24A

0.40-0.48A

1.12-1.41A

0.18-0.21A

88W

44W

200W

84W

42W

180W

84W

42W

180W

2

4

4

2

4

4

10

16

35

10

16

35

12

20

42

12

20

42

44W

88W

200W

0.36-0.42A

1.14-1.21A

0.18-0.21A

0.36-0.42A

1.14-1.21A

0.20-0.24A

0.40-0.48A

1.12-1.41A

200-230VAC

200-230VAC

200-230VAC

200-230VAC

200-230VAC

Single phase

Single phase

Single phase

Single phase

Single phase

Single phase


OC-12-A200-CE

OC-28-A200-CE

OC-37-A200-CE

OC-12S-A200-CE

OC-28S-A200-CE

OC-37S-A200-CE

OC-12-A200-CE

OC-28-A200-CE

(OF-S1)

(OF-S1)

Packing

InternalAIR

ExternalAIR

Terminal block1637

1566

4

100

139.5

116

160

200

53

58

480

19

15

450

75

464

14

116

119.5

4-

φ5.5 or M5 stud bolt

Packing

19 280

110 20

15

560

200

574

90

590

110

15

18.5 16

51

58

4

116 11614

162

14

116

207

75


Externalair

Internalair

Terminal block

– 10 –







External lateral mounting

Accessories

Accessories

Accessories

Accessories

Filter guard

Filter guard

Filter guard

Filter guard

Fin guard

Filter(OF-S2)

OC-37-A200-CE

OC-12S-A200-CE

OC-28S-A200-CE

OC-37S-A200-CE

Outline drawing







Filter (OF-S1)

Filter (OF-S1)

Filter (OF-S2)

Filter retainer

Filter retainer

Filter retainer

BOXFANOHM ELECTRIC CO.,LTD.

1519

4 66

450

480

200

9.5 16

8032

139.5

61.5 30

10015

5158

75464

14116

119.5 116

160Packing

Packing

InternalAIR

InternalAIR

Packing

InternalAIR

ExternalAIR

ExternalAIR

ExternalAIR

Terminal block

Terminal block

Terminal block

Specifications Mounting cutout

盤内AIR

パッキン

OHM ELECTRIC CO.,LTD.

BOXFAN

端子台

9015

628

11

14 170170

340

200

207

12

650

382 19

36

836

4

4616

75194

150

58


15560

71.5

15904

16

19 58

5240

70574095

280

111111

110 11020

200

80

116 11614

7514

116

207

OHM ELECTRIC CO.,LTD.BOXFAN

162 162

638

58

78

14

664088

170

12

200382

650 340

11628

90 15

19

1684

207

170

75150

OC-153H-A100OC-153H-A200

OC–201L

■

OC-153H-A100

9 11 4.2kg

0.50A 0.45A

44W 42W 2OC-153H-A200

0.25A 0.23A

OC-201L 6.5 3.5kg DC24V 0.52A 12.5W 4

OC-0810HIL

6.5 8 3.0kgAC100V 0.44A 0.36A

28W 22W 2OC-0820HIL AC200V 0.22A 0.18A

– 11 –

Compact SeriesMinimal sized models for narrow spacesSpecifications


Semi-recessed

lateral mounting

Power cord

Power cord

(*1) Rated capacity means nominal cooling capacity when temperature difference between enclosure interior and outer air is 20K.(*2) OC-153H-A※※ models are designed for100VAC or 200VAC single phase voltage supplies. For different voltage specifications, please cosult us. For other models, voltage fluctuation range should be +/-10% from the rating.

Internal lateral mountingMounting cutouts shows the view from the direction of arrow


AccessoriesFilter guard（OG-153HFAN)Fin guard（OG-153HFIN) 2Filter（OF-S1) 1

1




Current consumption Power consumption50Hz 60Hz 50Hz 60Hz 50Hz 60HzConnection Weight No. of

fan motorsSingle phase

Single phase

Single phase

100-120VACSingle phase200-230VAC



Accessories

Filter(OF-08HIL) 1


7719

5871

612195

5

125153

395

138

104,8

110

35280

35

110

300

3636

280

138

124

104.8

16150

150

4-M3

φ116

6-φ5.5

Packing

Packing

InternalAIR

InternalAIR

InternalAIR

ExternalAIR

ExternalAIR

ExternalAIR

Terminal block

4-M4

148

1704-φ4.5

4-φ4.5 or M4 tapping

58138.5

4031.5

160

Power cord L=1m

33

200 566

300

5

189

206

8765

176156

Power cord

152

L=1m

166

155

190

100

12

ThermostatFeatures

OTH-05

OTH-03

CE-conformed

Functions well even in an oily atmosphere

Applicable to any heat exchangers and fan motorsEffective for energy saving

ModelOutput contact rating

Contact current rating

Dimensions

Weight

Temperature setting range

Specifications

Outline drawing

Outline drawing

240VAC 5A (cosφ=1)

W49xH24xD24(Excluding cable)

190g (Including cable)

OPEN (OFF) 29±3℃CLOSE (ON) 37±4℃

Approx. 5A, Resistance load

OTH-05

Model

Output contact rating

Contact current rating

DimensionsWeight

Temperature setting range

Specifications

250/115/60/48/24VAC 60/48/24VDC

W70xH70xD25105g (Including cable)

+5 to +60℃ (variable)Terminal 5-3 (Heater) AC10A DC=30W, Resistance load

Terminal 5-4 (Heatexchanger) AC5A DC=30W, Resistance load

OTH-03

Crimp terminal M4

Insulation capOA-QM4 (Included in the supply)

Fitting

Fitting

Fixed temperature settingBimetal probe thermostatCE declared

Variable temperature settingBimetal probe thermostatCE conformed

Use a band or a M4 screw with washer

Install to a DIN rail using the enclosed attachment parts or directly to the enclosure surface

W：49mm

D：24mm

H：24mm

H：70mm

W：70mm

D：25mm

OC–17(S)–A※※

OC–12(S)–A※※

OC–15(S)–A※※

OC–28(S)–A※※

OC–31(S)–A※※

OC–30(S)–A※※

OC–20(S)–A※※

OC–37(S)–A※※

OC–40(S)–A※※

OC–12(S)–A200-CE

OC–28(S)–A200-CE

OC–37(S)–A200-CE

– 13 –

Filter guard, Fin guard, Filter and Fan motor list

Filter guardBOXFAN Model Fin guard Replacement filter Replacement fan

Standard series

(1 pc.)

(1 pc.)(1 pc.)

(1 pc.)

(1 pc.)

(1 pc.)

(1 pc.)(1 pc.)

(1 pc.)

CE series(1 pc.)(1 pc.)

(1 pc.)

OC–153H–A※※

OC–201L

OC–0810HIL

OC–0820HIL

(1 pc.)

Compact series

(5 pcs./set)

(5 pcs./set)

Replace or clean the filter periodically like every 2 to 3 weeks according to the environmental conditions.

Option

Outline drawing

Material

Filter guard part number Fin guard part number

Filter guard

Filter guard Material Material

MaterialFilter

Fin guard

Fin guard

129 129

157 183

159179129259299162279179359179

Nylon 66(Flame resistance : UL94 V-0)

Nylon 66(Flame resistance : UL94 V-0)

Polypropylene

Polyester

Filter Fin guard

Guide

Filter guard

Example: Example:

Standard series, OC-153H, CE series (accessories)

– 14 –

OF-S1

OG-17 FINOG-12 FINOG-15 FINOG-28 FINOG-31 FIN

OG-17 FINOG-12 FINOG-15 FINOG-28 FINOG-31 FIN

OG-30 FINOG-20H FINOG-37 FINOG-40H FIN

OG-30 FINOG-20H FINOG-37 FINOG-40H FIN

OG-153H FIN

OG-17 FANOG-12 FANOG-15 FANOG-28 FANOG-31 FAN

OG-17 FANOG-12 FANOG-15 FANOG-28 FANOG-31 FAN

OG-30 FANOG-20H FANOG-37 FANOG-40H FAN

OG-30 FANOG-20H FANOG-37 FANOG-40H FAN

OG-153H FAN

OG-153H FAN OG-153H FIN

OF-S2OF-08HIL

15

Model selectionApproaching method

Use the Graph

Use the Calculation formula

Is Calorific value insidethe cabinet (P) known?

Is Calorific value insidethe cabinet (P) known?

Yes

Yes

No

No

Heat-transfer coefficient of a cabinetCabinet matrial Heat transfer coefficient

Painted steel 5W/(sqm・K)3.7W/(sqm・K)Plastic

Note: The temperatures both inside and outside the cabinet shoudl have been measured.Example : External temperature (measured) T3 = 40℃

Example : Calorific value inside the cabinet P = 500W

Internal temperature (measured) T4 = 68℃

Condition

Condition

(1) Cabinet (painted steel) Heat-transfer coefficient U ≒5W(sqm・K) Outline dimensions = W630 x H1250 x D630 mm Effective radiation area S =3.55sqm *Bottom area is excluded(2) Max. External temperature T1 = 40℃(3) Allowable internal temperature T2 = 55℃

The required capacity of BOXFAN is found by the following formula.

(1) Cabinet (painted steel) Heat-transfer coefficient U ≒5W(sqm・K) Outline dimensions = W630 x H1250 x D630 mm Effective radiation area S =3.55sqm *Bottom area is excluded(2) Max. External temperature T1 = 40℃(3) Allowable internal temperature T2 = 55℃

The required capacity of BOXFAN is found by the following formula.

≒16(W/K)

Select a model that has 16W/K or larger capacity.

Select a model that has 16W/K or larger capacity.

≒16(W/K)

Note: The temperatures both inside and outside the cabinet shoudl have been measured.Example : External temperature (measured) = 40℃, Internal temperature (measured) = 68℃, Allowable temperature inside the cabinet = 55℃

Difference between Allowble internal temp. and Max. external temp. ΔT1 [K]

Difference between internal temp. and Max. external temp. ΔT2 [K]

Rated capacity of heat exchanger　Q 「W/K]

Effec

tive radiation area

S [s

qm]

16

1) The temperature difference between inside and outside of the cabinet ΔT2 is 68-40 = 28[K]. ΔT1 is the difference between Allowable internal temp. and Max. external temp., that is 55-40 = 15K. Find the intersection point A of these two.

2) Draw a horizontal line from the point A to the right of the graph to find out the intersection point B of it with the effective radiation area S, 3.55sqm.

3) Draw a vertical line from the point B to find the required capacity Q, which is 16W/K. Select a model that has 16W/K or larger capacity.

1) The calorific value P is 500(W). ΔT1 is the difference between Allowable internal temp. and Max. external temp., that is 55-40 = 15K. Find the intersection point A of these two.

2) Draw a horizontal line from the point A to the right of the graph to find out the intersection point B of it with the effective radiation area S, 3.55sqm.

3) Draw a vertical line from the point B to find the required capacity Q, which is 16W/K. Select a model that has 16W/K or larger capacity.

Example : Calorific value inside the cabinet P = 500W Allowable temperature inside the cabinet = 55℃, Max. external temperature = 40℃

Difference between Allowble internal temp. and Max. external temp. ΔT1 [K]

Calorific value inside the cabinet P [W] Rated capacity of heat exchanger　Q 「W/K]

The required rated capacity of BOXFANhas been found out.

Select a model which capacity isnot less than the result.

What is the unit W/K (watt per kelvin)?

W : Heat flow 1W = 1 J/S

1W/K means the ability to let heat flow of 1 W out from a cabinet when the temperaure difference between the cabinet interior and the external air is 1K.Thus, 5W/K is the ability to transfer heat of 5W from inside to outside when the temperature differentialbetween inside and outside of the cabinet is 1K.

<Caution> (1) The airtightness, location of heat gerators and dirts on heat radiation unit or filter can affect the performance of a heat exchanger. It is recommended to make selection with allowance for such losses.(2) The internal temperature of a cabinet should not exceed 60 deg. C. with operating a heat exchanger.(3) Because of its operating principle, heat exchanger’s performance declines when temperature gap between inside and outside narrows.(4) Each rated capacity of our heat exchangers indicates the nominal value when cabinet interior’s temperaure is higher than outside by 20deg. C. If temperature gap is smaller than this, the capability declines. Use of heat exchanger is not effective when such gap is less than 10 deg. C.

17

Technical data

Carorific values of electric components General note

（1）Minor componentsPilot lamps, cables and other components than listed here also generate heat in a cabinet but they are omitted for the reasons that thosevalues are small and not easily assessable.

（2）Carorific valuesThe values listed herei are rough standard for each component and can be variable depending on the state of load. Please use the datataking this into your account. Even the carorific value of a component is very small and therefore not mentioned here, the total value canbe nonnegligible if there are many. Always try to find appropriate values at the site for calculation.

（3）Unlisted itemsFor the components like PLC which are not listed here, refer to the data provided by the manufacturer. These components are often used in a cabinet but it is difficult to ouline their carorific values.

（4）Carorific values in the following tableThis table shows standard values of generally used components based on our study. Actual values may differ from them depending oneach specifications. See the information provided by the manufacturer.

Carorific value (Rough standard)

Note) All values are approximate and each actual value can differ from it.

1. Power supply Components Carorific value estimate Remarks

Small transformer

Rated capacity

Rated capacity

Rated capacity

Rated capacity

up to 100VA …15％ 300VA …10％ 1kVA … 7％ 3kVA … 5％ 5kVA … 4％ 10kVA … 3％

・Calculated as Loss = Carorific value




Voltage regulatorup to 500VA …10％

1kVA … 7％10kVA … 5％

Constant-voltage power fupply up to 2kVA …15％

10kVA …10％

Uninterruptible power supply (UPS)up to 1kVA

up to 0.1kVA

… 20％20kVA …15％・Values are at floating charge status of storage batteries

・Constant feeding by inverter

Switching regulator 20 to 30% of the rated capacity・Carofific value with 100% rated output

Low-voltage capacitor 0.2 to 0.3% of the rated capacity ・Capacities should be converted to kVA for calculation （100V 60Hz 1kVA＝ 265.3 μ F）

2．Amplifiers

AC Servo amplifier

Rated capacity

Rated capacity

… 50％0.5kVA … 15％

1kVA … 8％3kVA … 5％5kVA … 4％

11kVA … 3.5％22kVA … 3％

・Carorific values with 100% output of the rating per unit・The smaller the capacity, the bigger the heat generation ratio.

・The smaller the capacity, the bigger the heat generation ratio.





・With power supply equipped

Inverter

…12.5％0.75kW … 11％

1.5kW … 8％2.2kW … 7％3.7kW … 6％7.5kW … 6％11kW … 5％22kW … 4.5％30kW … 4％

・Carofific values with 100% rated output

・Carorific values at constant output of the rating

Thyristor

Rated current 1-phase 3-phaseup to 25A … 50W 90W

35A … 55W 115W50A … 75W 175W75A … 90W 250W

100A … 120W 320W150A … 200W 520W250A … 350W 930W350A … 400W 1150W450A … 560W 1600W600A … 700W 2000W

・Values in the right are carorific values・3-phase types have bigger values than 1-phase types

Components Carorific value estimate Remarks

up to 0.4kW

Note: These information are adapted from “Technical data No. 001-2004 “Carorific value guideline for electric components in cabinets” by Thermal Solution Equipment for Cabinet Technical Soociation , Japan.

3. Wiring components

Molded case circuit breaker（MCCB）

（MCCB）Rated capacity

Rated capacity

20A … 7W50A … 14W

100A … 21W225A … 45W400A …115W

・Carorific value with 100% rated current ・Proportional to the number of poles・Values are for 3P

Earth leakage circuit breaker（ELCB）

（ELCB）（※ 1）Rated current

Rated current

225A …MCCB + 5W400A …MCCB+30W

（Ground-fault electronic circuit, etc.）

・ELCB is unrelated to the number of poles（※ 1）Smaller components have smaller heat generation ratio.

Electromagnetic contactor

4kW … 7W11kW … 15W22kW … 30W37kW … 50W55kW … 90W

110kW …200W160kW …340W200kW …460W

・Carorific value with 100% rated current ・Values are for 3P・Values are for 220VAC

Thermal overload relay

15A … 2W／pole30A … 3W／pole

100A … 7W／pole150A … 9W／pole450A …10W／pole600A …12W／pole

・Carorific vales with max. stabilized current

Electromagnetic relay 5W ・Carorific values with 100% rated current

4．Control devices

Small relaysMiniature relay ： 1W to 2W per piecePower relay ： 2W to 3 W per piece

Solid-state relay（SSC、SSR） Load current value x 1.8W ・When voltage drop with closed circuit is 1.8VTemperature controller Power consumption is regarded as carorific value

PLC

Micro sequencer :・For AC power

10 to 40 I/O points 30 to 50W64 or more I/O points I/O poiints × 1W

・For DC powerI/O points × 0.5W

Other sequencers :See the output current value of the power supply unit. In designing phase, use the max. value of the power supply unit.

5．Information and telecommunication equipment

PCMonitorServer

Switching hubRouter

Media converter

Power consumption is regarded as carorific value

Booster Consumption current - Transmission power output

IndicatorLED indicator : Consumption current x 0.4

LC: Power consumption is regarded as carorific value

6．Others

Fan motor

90mm sq.size …10W120 mm sq.size …20W140 mm sq.size …40W150 mm dia.size …55W180 mm sq.size …55W

・Rated input is regared as carorific value・Values are for axial fans・Values are for AC power input・Sizes are for frames

〔Notes〕（1）When using rated capacities (VA) or rated outputs (VA), multiply those values by percentage to obtain the carorific value.（2）Actual values may differ from the above table. Check the values on the catalogs and technical information provided by the manufacturer.（3）Wires and other small components are heating source as well. Take those values into your account.





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Technical data

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7000-21 Nakagawa, Hosoe, Kita-ku, Hamamatsu, Shizuoka, 431-1304 JapanTEL : +81-53-522-5562 FAX : +81-53-523-2362URL : https://www.ohm.jp/ E-mail : [email protected]

Colors of products may slightly different from actual due to printing.The contents of this material are as of January 2019.

All products and specifications in this material may change without notice for additions and betterments.

enclosure heat exchangerheat exchange in the radiation ﬁn 1) heated air inside an enclosure...

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