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Rittal SK 3329540 three-phase enclosure cooling unit for 400 V/50 Hz or 460 V/60 Hz. Check heat load, mounting and troubleshooting, then request a quote.
Item No :
SK 3329540Material :
Sheet steelColor :
RAL 7035Weight :
70.3 kg
Rittal SK 3329540 is a three-phase Blue e TopTherm wall-mounted cooling unit for electrical enclosures with substantial heat losses. Its rated supply is 400 V at 50 Hz or 460 V at 60 Hz. The unit has an e-Comfort controller and integral electric condensate evaporation.
Adding drives or replacing an undersized cabinet cooler? Send SUWI Auto the revised cabinet heat losses, supply voltage and frequency, maximum ambient temperature and mounting arrangement. Include the quantity and delivery destination for a quotation.
| Article no. | SK 3329540 |
| Design | Wall-mounted enclosure cooling unit |
| Dimensions (W × H × D) | 400 × 1580 × 295 mm |
| Material | Sheet steel |
| Colour | RAL 7035 |
| Cooling output to DIN EN 14511 | L35/L35, 50 Hz: 2.55 kW L35/L35, 60 Hz: 2.75 kW L35/L50, 50 Hz: 1.90 kW L35/L50, 60 Hz: 2.00 kW |
| Rated operating voltage | 400 V, three-phase, 50 Hz 460 V, three-phase, 60 Hz |
| Maximum rated current | 50 Hz: 3.3 A 60 Hz: 3.4 A |
| Maximum start-up current | 50 Hz: 6.8 A 60 Hz: 7.6 A |
| Air throughput (unimpeded) | External circuit: 1200 m³/h Internal circuit: 1200 m³/h |
| Energy efficiency ratio at L35/L35 | 50 Hz: 2.11 60 Hz: 1.88 |
| Protection category to IEC 60529 | External circuit: IP34 Internal circuit: IP54 |
| UL type rating | Type 12 |
| Temperature control | e-Comfort controller Factory setting: +35 °C |
| Operating temperature range | +10 °C to +55 °C |
| Temperature setting range | +20 °C to +55 °C |
| Storage temperature range | −40 °C to +70 °C |
| Power consumption | L35/L35, 50 Hz: 1.19 kW L35/L35, 60 Hz: 1.46 kW L35/L50, 50 Hz: 1.45 kW L35/L50, 60 Hz: 1.75 kW |
| Refrigerant / charge | R-513A / 1.15 kg |
| Maximum permissible operating pressure | 28 bar |
| Manufacturer-specified protective device | Motor circuit-breaker: 6.3–10 A |
| Supply includes | Condenser with hydrophobic RiNano coating Fully wired unit with plug-in terminal strip Drilling template and assembly parts Integral electric condensate evaporation |
| Packaging unit | 1 pc. |
| Net / gross weight | 70.3 kg / 74 kg |
| EAN | 4028177323124 |
| ETIM 8 / ETIM 9 | EC000855 |
Adding drives, power supplies or other equipment can increase cooling demand beyond the original cabinet design. At 50 Hz, SK 3329540 delivers 2.55 kW at L35/L35 and 1.90 kW at L35/L50. These ratings use a 35 °C cabinet temperature with ambient air at 35 °C or 50 °C respectively.
For example, a required duty of 2.2 kW at 35 °C inside and 50 °C outside exceeds the 1.90 kW rating at 50 Hz. Recalculate component heat losses and enclosure heat transfer after modifying the cabinet. Select the cooling unit using its output at the design temperatures.
Match the installation supply to the specified voltage and frequency: 400 V, three-phase, 50 Hz or 460 V, three-phase, 60 Hz. Have a qualified electrician confirm phase availability, phase sequence and motor protection against the nameplate and installation manual. The listed 6.3–10 A motor circuit-breaker range does not mean that the breaker should automatically be set to 10 A.
The unit weighs 70.3 kg and is 1580 mm high. Check the mounting surface, door loading, cabinet stability and service clearance. Use the installation drawing for the selected mounting arrangement; the overall housing dimensions are not the cut-out dimensions.
Check the certificate scope against the project requirements. For replacement or servicing, use the instructions matching the refrigerant and production version shown on the existing nameplate.
Request an SK 3329540 quotation or cooling capacity check. Provide quantity, destination, supply voltage/frequency and cabinet heat losses. Include maximum ambient temperature, target internal temperature and mounting details. For replacement, add the existing nameplate photo and cut-out dimensions; for a fault, include the controller message and measured temperatures.
If the available supply, installation space or calculated cooling duty does not match SK 3329540, compare other Blue e TopTherm models. Confirm the alternative’s output at the design temperatures and its mounting requirements before changing the cabinet layout.
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