Safe Discharge Unit SDU
ACCESSORIES FOR ACTIVE ENERGY MANAGEMENT DEVICES
Safe Discharge Unit SDU
The Safe Discharge Unit SDU discharges the capacities at the control cabinet in case of maintenance work.
Spotlight
Average discharge power
approx. 1,400 Watt
Max. oporating voltage
800 VDC
Nominal oporating voltage
470 VDC
Energy intake
200 kWs (SDU-200)
Energy intake
400 kWs (SDU-400)
Contact
Michael Koch GmbH
Phone: +49 7251 96 26-200
Environmental conditions:
| Parameter | Value |
|---|---|
| Ambient temperature | -10° C to +65° C (transport, storage) |
| 0°C up to +40°C (operation) | |
| Relative humidity | <95% (transport, storage) |
| <85% (operation) | |
| Type of cooling | Air cooled (convection) |
| Protection class of the housing | IP20 |
| Degree of contamination of installation location | 2 |
| Noise emission | The SDU does not emit any noise (< 70 dB(A)) |
Technical data SDU:
| Parameter | SDU-200 | SDU-400 |
|---|---|---|
| Average discharge power | approx. 1,400 W | approx. 1,400 W |
| Energy intake | approx. 200 kWs | approx. 400 kWs |
| Max. operating voltage | 800 VDC | 800 VDC |
| Nominal operating voltage | 470 VDC | 470 VDC |
| Isolation voltage | 2,800 VDC | 2,800 VDC |
| Max. surface temp. on the housing front | max. 30°C | max. 62°C |
| Max. surface temp. on the housing top | max. 55°C | max. 85°C |
| Dimensions mm H x W x D | 340 x 102 x 90 | 340 x 102 x 90 |
| Weight kg | approx. 3.0 | approx. 3.7 |
| cable cross section | max. 4 mm² | max. 4 mm² |
| Nominal cross section | 2.5 mm² | 2.5 mm² |
| Protection class | housing IP20 | housing IP20 |
The Safe Discharge Unit SDU discharges the capacities to a desired, safe voltage level within a reasonable timeframe. The safe discharge unit with the type designation SDU-200 is able to hold ca. 200 kilowatt-seconds of energy at a discharge capacity of around 1,400 watts. Connected to the DC link by means of a DC switch, the safe discharge unit can be used to ensure a safe voltage level of the frequency inverter including storage units, for example during maintenance. An emergency discharge unit is also integrated.
The safe SDU discharge unit is suitable for direct integration into any capacity network, for instance into large DC links. It is delivered with a suitable DC switch that can connect to an additional SDU – in the event that more power, and thus more energy consumption or shorter discharge times, are required. The switch is equipped with a sensor that indicates whether the SDU is connected. An emergency discharge option is also available and an additional, overload-proof resistor has been built in for this purpose.
n all, the SDU – which is overload-proof and ensures the safety of maintenance staff – is considered a well-engineered periphery product for DC links with large capacities. The unit is particularly suited to our smart dynamic energy management devices and its dimensions mean it fits perfectly into the network.
Control cabinet maintenance work required whilst the capacities are still charged? To this end, our connectible, overload-proof resistor unit is the perfect match. It discharges the capacities to a desired, safe voltage level within a reasonable timeframe.
The safe discharge unit with the type designation SDU-200 is able to hold ca. 200 kilowatt-seconds of energy at a discharge capacity of around 1,400 watts. In an ambient temperature of 20 degrees Celsius, the temperature of the housing only rises to around 55 degrees Celsius.
