List of heat generation from devices housed in panel | panel problems

Note!

The following information on heat output by equipment is based on the information published by the Panel Heat-Related Equipment Industry Association, with additional information that we have researched ourselves.
The heat output of each device is a guideline, so if you would like to know the exact heat output, please contact the device manufacturer.

1. power supply and transformer equipment

Equipment stored inside the panel	Heat generation (reference value)	remarks
transformer	rating capacity ~ 100VA 15% ～300VA about 10% ～500VA about 8% ～1kVA about 7% ～3kVA about 5% ~ 5kVA 4% ～10kVA about 3% ~ 50kVA 2.5% ~ 100kVA 2%	Types: Compound-wound transformer, isolation transformer Loss is considered to be the amount of heat generated. The smaller the size, the greater the heat generation rate.
Voltage regulator	rating capacity ～500VA about 10% ～1kVA about 7% ~ 40kVA 5%	Type: Slide transformer (manual) Loss is considered to be the amount of heat generated. The smaller the size, the greater the heat generation rate.
AC power supply supply stabilized power supply	rating Output Capacity ~ 5kVA 20% ~ 10kVA approximately 15%	Loss is considered to be the amount of heat generated.
uninterruptible power supply supply (UPS)	Approximately 10 to 15% of the rating output capacity	The smaller the size, the greater the heat generation rate. The heat generation amount is the value when the battery is in a floating charge state. It is a constant inverter power supply type.
DC stabilized power supply (switching regulator)	rating Output Capacity ~ 6kW 20-30% ~ 15kW 10-15%	The smaller the size, the greater the heat generation rate. This is the amount of heat generated when rating output capacity is 100%.
Low-Voltage Capacitor	Approximately 0.15 to 0.2% of rating capacity	Loss is considered to be the amount of heat generated. The rating capacity (kvar) is calculated from the capacitor capacity and power-supply voltage. At 100V 50Hz 1kvar=318.3μF At 100V 60Hz 1kvar=265.3μF
lead acid battery	Q(W) = I x V x n	This calculation applies only to heat generation during charging. Q: Heat output (W) I: Charging current (A) V: Charging voltage (V) n: number of cells

2. Amplifiers and converters

Equipment stored inside the panel	Heat generation (reference value)	remarks
AC servo amplifier	rating Output ~ 0.1kVA approximately 40% ~ 0.5kVA 10% ～1kVA about 8% ～3kVA about 5% ~ 5kVA 4% ~ 11kVA approximately 3.5% ～22kVA about 3%	This is the heat generation amount per servo amplifier when rating output is 100%. The smaller the size, the greater the heat generation rate. It is a built-in power supply type.
inverter	rating Output ~ 0.4kW 12.5% ~ 0.75kW 11% ~ 1.5kW 8% ~ 2.2kW 7% ~ 3.7kW approximately 6% ~ 7.5kW 6% ~ 11kW approximately 5% ~ 22kW 4.5% ~ 30kW approximately 4%	The smaller the size, the greater the heat generation rate. This is the amount of heat generated at 100% rating output. When continuous rating output is used. The heat output decreases as the load and utilization rate decrease, so it should be calculated according to the manufacturer's specification.
Large inverter (200V system)	rating Output ~37kW 1400W approx. ~45kW 1800W ~55kW 2400W approx. ~75kW 2500W approx. ~90kW 2800W approx.
Large inverter (400V system)	rating Output ~37kW 1600W approx. ~45kW 2000W approx. ~55kW 2200W approx. ~75kW 2400W approx. ~90kW 2500W approx.	This is the amount of heat generated when rating output is 100%. The smaller the size, the greater the heat generation rate. When continuous rating output is used. The heat output decreases as the load and utilization rate decrease, so it should be calculated according to the manufacturer's specification.
Thyristor (single-phase)	rating current ～25A 50W approx. ~ 35A 55W approx. ～50A 75W approx. ～75A 110W approx. ~ 100A 120W approx. ~ 150A 200W approx. ~ 250A 350W approx. ~ 350A 400W approx. ~ 450A 520W approx. ~ 600A 700W approx.	Heat output indication. Three-phase generates more heat than single-phase.
Thyristor (three phase)	rating current ～25A 90W approx. ~ 35A 115W approx. ~ 50A 175W approx. ～75A 250W approx. ~ 100A 320W approx. ~ 150A 520W approx. ~ 250A 930W approx. ~ 350A 1150W approx. ~ 450A 1600W approx. ~ 600A 2000W	Heat output indication. Three-phase generates more heat than single-phase.
Power conditioner	rating output (kW) x (1 - power conversion efficiency %/100)	Type: Industrial.

3. Wiring equipment

Equipment stored inside the panel	Heat generation (reference value)	remarks
Circuit breaker (MCCB)	rating current ~ 20A 5W approx. ~ 50A 10W approx. ~ 100A 15W approx. ~ 225A 35W approx. ~ 400A 85W approx. ~ 600A 110W approx. ~ 800A 135W approx.	The amount of heat generated when rating current is 100%. It is proportional to the number of poles. This is for threesomes.
earth leakage breaker (ELCB)	rating current ~ 225A MCCB+ 5W approx. ~ 400A MCCB+30W approx. ~ 600A MCCB+35W approx. ~ 800A MCCB+65W approx. (Earth leakage electronic circuit section, etc.)	The amount of heat generated when rating current is 100%. It is proportional to the number of poles. This is for threesomes. The leakage current electronic circuitry is independent of the number of poles.
electromagnetic contactor	rating capacity ~ 4kW 7W approx. ~ 11kW 15W approx. ~ 22kW 30W approx. ～37kW 50W approx. ~ 55kW 90W approx. ~ 110kW 200W approx. ~ 160kW 340W approx. ~ 200kW 460W approx.	The amount of heat generated when rating current is 100%. This is for threesomes. This is for AC220V.
Thermal overload relay (thermal)	rating current ~ 15A 2W/Extreme ~ 30A 3W/Extreme ~ 100A 7W/Extreme ~ 150A 9W/Extreme ~ 450A 12W/Extreme ~ 600A 13W/Extreme	The amount of heat generated when the maximum settling current is applied.
electromagnetic relay	About 4W	The amount of heat generated when rating current is 100%.

4. Control equipment

Equipment stored inside the panel	Heat generation (reference value)	remarks
Small relay	Mini relay: Approximately 1W to 2W per unit Power relay: Approximately 2W to 3W per unit	power consumption of the coil is considered to be the heat generation amount.
Solid State Relay (SSC, SSR)	For single-phase: Heat generation amount W = Output ON voltage drop V × Load current A For 3-phase: Heat generation amount W = Output ON voltage drop V x load current A x number of elements	Output ON voltage drop: Approximately 1.6 to 1.8V.
temperature controller	current consumption is considered to be the amount of heat generated.
PLC	Integrated PLC (all-in-one type): power consumption is considered heat generation. Reference (less expandable/expandable) ・For AC power supply I/O points 10~32 20~35W approx. 32-64 35-50W 64 or more I/O points x 0.7 to 1W ・For DC power supply I/O points 10-32 20W or less 32 or more I/O points x 0.5W Other PLCs (configuration of base, power supply, and CPU unit): power consumption of power supply unit is considered to be power consumption.	Use power consumption as a reference based on the internal current consumption of each unit. The heat generated per slot is approximately 6W.
PC	power consumption is considered heat generation.
LCD monitor	power consumption is considered heat generation.

5. Other

Equipment stored inside the panel	Heat generation (reference value)	remarks
fan motor	90Φ size 10W approx. 120Φ size, approx. 20W 140Φ size 40W approx. 150Φ size 55W approx. 180Φ size 55W approx.	Rating input is considered the heat output. This is the case for an axial fan motor. For AC input. The size is the frame size.

List of heat generation of devices housed in panel

1. power supply and transformer equipment

2. Amplifiers and converters

3. Wiring equipment

4. Control equipment

5. Other