Condor MDR3/11X-16A pressure switch for piston compressors 400/50 V/Hz · 3 poles · relay 10.00–16.00 A · max. 11 bar · factory-set 8.0–10.0 bar
Code: MDR3/11X-16A
Product detailed description
The strongest relay supplied with the block version. The 10.00 to 16.00 A range reaches motors where the switch itself begins to be the limit — the MDR 3 switches to 7.5 kW. Above this relay the question is no longer the size of the protection but what the switch can do.
Where the ceiling is
The relay adjusts to 16 A, but the switching capacity of the MDR 3 is 7.5 kW at 400 V. On machines near that limit it is worth checking whether the compressor maker specifies a contactor — the switch then does not drive the motor directly, only its coil.
On machines above 7.5 kW a pressure switch is always wired through a contactor and the question falls away. Current protection is then done by a motor circuit breaker, not by the relay in the switch.
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
The aluminium block with one inlet and three outlets — the same as on the weaker relays in this series.
How it differs from its siblings
Weaker relays are in MDR3/11X-10A and MDR3/11X-6A. If you need the same strength without a block, that is MDR3/11-16A with a single 1/4" thread. The strongest relay in the whole range is in MDR3/11-20A.
Ventilek recommends
Sixteen amps on the relay does not mean the switch will carry anything. Its ceiling is 7.5 kW — above that you go through a contactor.
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: | 16 A |
| 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.