The compact long-acting contactor KM-50DV is designed for switching on and off the electric power consumers in aircraft electrical systems operated in different climatic conditions (including tropical ones).
KM-50D-B is designed for operation at ambient temperature from plus 50 to minus 60 ° С, relative humidity of ambient air up to 98% at 40 ° С, height above sea level up to 20 000 m, vibration of fixing points in frequency range 10. . .200 Hz. The contactor withstands without damage and without spontaneous faults and opening of contacts linear acceleration up to 8 g and short-term shaking of attachment points with a frequency of 60 .. 100 beats per minute with acceleration up to 4 g.
The contactor can be mounted on the object in any spatial position, but the best position is by the contact terminals upwards, which increases its durability. Before installing the contactor on the object:
- make sure that it is free of damage and cracks; check the insulation resistance in the cold state – it must be at least 20 MP;
- check the operation of the contactor at a voltage (27 ± 3) V;
- install the contactor on the object, securely pulling the stand to the installation site with two bolts, fix the bolts;
- Connect the power and control circuit wires to the corresponding terminals, ensuring reliable electrical contact;
- check the operation of the contactor under voltage.
At the installation site, the contactor protects against gasoline, kerosene, oil, water, etc. liquids, as well as metal shavings and dirt.
|Voltage in the contact circuit, V: – DC – AC 50. .400 Hz||27 ± 3 220±5 %|
|Current strength in the contact circuit, A||1,5 … 50|
|Voltage in the winding circuit, V||27 ±3|
|The current consumed by the winding, A||0,4|
|Response frequency per minute||2|
|Switching voltage in the heated state at resistance of supply leads 1.5 Ј1, V, no more than||20|
|Switch-off voltage in the heated state with resistance of supply leads 1.5 Ј2, V||6|
|Voltage drop on the contacts at ambient temperature (20 ± 5) ° С, mV||150|
|Contactor contact current, A||0,25|
|Current overload, which the contactor withstands without damage during 2 min is not more frequent than every 5 h of operation, A||100|
|The maximum breaking current of the contacts of the contactor, A||400|
|Reverse spring force at the moment of contact opening, kgf||0,19 … 0,31|