SP-170861

The Allen-Bradley 170861 is a contactor with 3 poles that is intended to be used with the 1395 Digital DC Drives. The alternative part number for this item is the SP-170861, but it also can be found designated with the 1395-170861 part number. The 170861 contactor supersedes the 155780 and 117940 (ASEA EFLG315) contactors. It can be used together with modules that consume 261 Amps to 345 Amps of current. This covers many A Series 1395 DC modules that are supplied with 230, 380, 415, and 460 Volts AC voltages. This product comes with a DB contact arrangement. The Allen-Bradley 170861 is an electro-mechanical device that is used for switching applications. It has big and reliable contact mechanisms that are made to handle a large amount of currents and it can be used to control large power applications. It has a 3-phase configuration.  That means it has 3 normally open contacts that deliver power to the load side when the device is activated, and the power is disrupted when the coil on the device is de-energized.

The main interface between the 170861 contactor and an industrial control device are 2 control contacts called A1 and A2. They are used to activate the contactor when they are supplied with 115 Volts AC voltage, at 50 to 60 Hertz. This control voltage usually comes from a PLC.  Visually, the users can tell when the contactor is activated by looking at the square-shaped plastic block on the central part of the contactor. When the device closes its contacts, this block is pulled in. The 170861 3-pole contactor is engineered to be used in clean and dry non-corrosive industrial surroundings. Its operating temperature range is 32 to 149 degrees Fahrenheit at 5 to 95% relative humidity.