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MKPg-Druck_fürweb.qxp 13.09.2012 09:26 Seite 4 DIMENSION DRAWINGS MKPg-Druck_fürweb.qxp 13.09.2012 09:26 Seite 5 HOW TO READ THE SELECTION CHARTS Capacitors, Reactors, and Contactors Capacitor design Z Capacitor design S Protective cover Design Z A. You are looking for capacitors and contactors in a non-detuned capacitor bank, e.g. operation at 400V: 1. Select required capacitor power on page 6, e.g. 50kvar; as per chart, you need to use two pcs of item 277.769-516600. 2. See data of 25kvar 400V for details on the individual capacitors. 3. Recommended discharge resistors for each capacitor in the set: 3 x 47kΩ (1.1W) in star-connection. 4. Select matching capacitor contactor type 17237.004-50.0. Protective cover Design S B. You require a matching reactor with detuning factor 5.67% for the above: 1. Go to page 10 and look up the matching reactor in the line which corresponds to the (over-lapped) capacitor line of 50kvar 400V. The resulting power output of the LC-circuit will be 53kvar at 400V. 2. Mind that due to the higher power output, you must now use a bigger contactor (17237.004-50.7). 3. Note that with a capacitor set from the 415V range and matching reactor, you could achieve an exact output of 50kvar into the 400V mains and use the smaller contactor 17237.004-50.0. terminal design Z S Discharge Resistors max. I N per phase 30 A 43A 2 cable cross section 2 × 10 mm /phase 2 × 16 mm /phase Separate resistor modules 2 (connection with forked cable lug) for fast and convenient fastening torque 1.2 … 2.0 Nm 1.2 … 2.0 Nm connection to the C. Your specification prescribes the use of capacitors with a higher voltage rating for a detuned application. terminal are available on request. Example: 25kvar 400V 50Hz, 7% reactor, capacitors must have 525V rating. 1. Select required power of LC-circuit on page 7, (25kvar 400V); Detuning reactors use the visible part of overlapped capacitor chart (page 11) on the Temperature switch right-hand margin as indicator for proper capacitor voltage. 2. Select matching capacitor contactor type 17237.004-25.0. 3. Go to page 11 for details of the applicable capacitor. You are recommended to use 2 pcs of 20kvar 525V capacitors. Design shown as listed in this catalogue. 4. Recommended discharge resistors for each capacitor in the set: power terminal Optional terminations: 3 x 100kΩ (0.9W) in star-connection. screw terminal block temperature-proof flexible cables Alternative mounting option: threaded bolts for lateral mounting 15 ... 20mm 4 5