3 Installation
MITSUBISHI CNC
86
3.1 Heat Radiation Countermeasures
Please refer to the following method for heat radiation countermeasures.
Example of heat radiation countermeasures
<Hypothetical conditions>
(1) Average internal temperature of operation panel: T
≤
55°C
(2) Peripheral temperature of operation panel : Ta
≤
0°C to 45°C
(3) Internal temperature rise value :
Δ
T = T - Ta (max) = 10°C
Procedures for heat design and verification
<Supplement>
(1) Refer to "General Specification" for the heat generated by each unit.
(2) Enclosed cabinet (thin steel plate) cooling capacity calculation equation
W1 = U × A ×
Δ
T
U: 6 W/m
2
°C
A: Effective heat radiation area (m
2
) (Area where heat can be radiated from operation panel)
Δ
T: Internal temperature rise value (10°C)
(Caution) 8 W/m
2
°C can be applied only when the operation panel is so small that the internal
temperature stays uniform.
(3) Points of caution for heat radiation countermeasures when designing mounting state
- Consider convection in operation panel (eliminate heat spots)
- Collect hot air at suction port of heat exchanger in operation panel.
(4) Criterion for internal temperature rise distribution data
Δ
T (average value)
≤
10°C
Δ
Tmax (maximum value)
≤
15°C
R (inconsistency
Δ
Tmax -
Δ
Tmin)
≤
6°C
(Evaluate existence of heat spots)
W
≤
W1
W>W1
Δ
T
≤
10°C
Δ
T>10°C
Calculate total heat radiation of each
mounted unit (W)
Comparison of W and W1
Collection of internal temperature rise
distribution data
Mounting design
Improvements
Completion
Selection of heat exchanger
Evaluation
Calculate cooling capacity of
operation panel (W1)
Summary of Contents for M70V Series
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Page 26: ...1 1 System Configuration ...
Page 36: ...11 2 General Specifications ...
Page 110: ...85 3 Installation ...
Page 120: ...95 4 Connection ...
Page 173: ...4 Connection MITSUBISHI CNC 148 ...
Page 174: ...149 付録 Ap 1 章 149 Appendix 1 Cable ...
Page 220: ...195 付録 Ap 2 章 195 Appendix 2 EMC Installation Guidelines ...
Page 232: ...207 付録 Ap 3 章 207 Appendix 3 Restrictions for Lithium Batteries ...
Page 241: ...Appendix 3 Restrictions for Lithium Batteries MITSUBISHI CNC 216 ...
Page 242: ...217 付録 Ap 4 章 217 Appendix 4 Precautions for Compliance to UL c UL Standards ...
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