Condor MDR3/11X-10A pressure switch for piston compressors 400/50 V/Hz · 3 poles · relay 6,30–10,00 A · max. 11 bar · factory set to 8,0–10,0 bar
Code: MDR3/11X-10A
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Product detailed description
The middle of the three relays in the block version, and in practice the one most asked for. The 6.30 to 10.00 A range covers a large share of 400 V workshop compressors. The connecting block, with one inlet and three outlets, makes up for ports the tank does not have.
Why this relay in particular
The 6.30 to 10.00 A range sits exactly where most three-phase workshop machines are. When the motor rated current falls on the boundary of two ranges, always take the higher one.
The switch itself is identical across all three relays — only the thermal relay inside differs. It can be changed later, but ordering the right one straight away costs less than sorting it out afterwards.
What is in the box
- Switching capacity 7.5 kW at 400 V to EN 60947, insulation voltage 690 V.
- Protection IP 54 — against dust and splashing water from every side.
- Mechanical life over a million operations, at most 120 operations an hour.
- Thermal overload relay included, set to the motor rated current.
- Rotary knob for switching on and off by hand.
- Air temperature −5 to +80 °C.
- Connection 3/8" + 3× 1/4" — one inlet and three outlets on a single block.
- Factory set to 8,0–10,0 bar; the screws under the cover change it.
The connection close up
One 3/8" inlet and three 1/4" outlets on a single aluminium block — gauge, safety valve and air outlet.
How it differs from its siblings
Smaller motors are covered by MDR3/11X-6A, the largest by MDR3/11X-16A. If your compressor runs above 11 bar you need the high-pressure version MDR3/16X-10A with the same relay.
Ventilek recommends
Set the relay to the figure on the plate, not to the top of the range. The motor then trips in time, not once it starts to smell.
Technical data follow the maker datasheet and the supplier catalogue. The switch must be connected by a person with the appropriate electrical qualification. The pressure is set under pressure and with the electrical supply disconnected.
Additional parameters
| Category: | Pressure switches for compressors: Condor and NE-MA |
|---|---|
| Connecting: | 3/8" + 3 × 1/4" |
| Poles: | 3 |
| Switching voltage: | 400/50 V/Hz |
| Current: | 10A |
| Minimum pressure: | 4.0 bar |
| Maximum pressure: | 11 bars |
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Condor: German precision in pressure control since 1893
In the world of compressors and pumps, the Condor brand is a byword for uncompromising quality, safety and technical excellence. As the inventor of the automatic pressure switch, this German family business with more than 130 years of tradition has grown into the world leader in its field.
History and innovation
The company was founded in 1893 by August Frede. Although it started out making centrifuges and milking machines, the decisive turning point came in 1935, when Condor was granted the world's first patent for an automatic diaphragm switch for pumps. That moment defined the brand's course as a pioneer in pressure control.
Why choose Condor components?
Condor pressure switches (above all the legendary MDR series) are now the standard relied on by respected compressor manufacturers all over the world.
- Extreme service life: Condor products undergo demanding tests (salt spray or water hammer tests, for example) that confirm their exceptional durability.
- Safety and certification: Production takes place in Germany to the strictest standards. Condor holds ISO 9001 certification and numerous international approvals, including versions for explosive atmospheres (ATEX).
- A wide range of uses: From small single-phase compressors (the MDR-1 and MDR-2 series) to powerful industrial machines that require motor overcurrent protection (MDR-3, MDR-5).
A legend called MDR
The MDR name has been on the market for more than 80 years. These switches stand out for their rugged design, high switching accuracy and the option of setting the cut-in and cut-out pressure individually. Thanks to integrated unloader valves they also let the electric motor start easily, with no back pressure.
If you are looking for the best that German engineering has to offer for your compressor or air line, Condor is a safe bet that will repay you with trouble-free operation for many years.