1410-EOB50

The 1410-EOB50 is an Allen-Bradley manufactured AC Motor protection device. The part number refers to a Motor Winding Heater, used to prevent a build-up of condensation, preventing damage to the motor winding. This heater is designed for installation to an AC motor with a Horsepower range of 24-100 HP and motor voltage of 460 VAC, + 10%, -15%, 3-Phase, 60 Hz. The 1410-EOB50 Motor Winding Heater has an operating temperature of 0 to 50 Degree Celsius while the storage temperature is -25 to 85 Degree Celsius. The motor heater is intended to be wired to the contacts of a motor starter that will energize the heater when the starter has started. Conversely, the heater must be de-energized when the motor starter is shut down. Furthermore, with the heater energized, a Silicon Controlled Rectifier (SCR) shall be connected to the two terminals of the motor. The output voltage of the SCR shall hold the winding temperature at 5-10 Degrees above the ambient temperature. Protection circuits such as Metal Oxide Varistor (MOV) or Resistor - Capacitor (RC) snubber circuit can be installed to protect the device from transient voltage and limit voltage rate of change. The 1410-EOB50 heater has physical dimensions of 4.5 inches or 114.3 mm (H) x 3.5 inches or 88.9 mm (D) x 5 ¾ or 146.1 mm (L). The heater can be mounted in any orientation however, the printed circuit board must be facing up. Four mounting holes are provided with the heater measuring 7/32 inch or 5.6 mm diameter. It is required to install this motor winding heater when the motor is disconnected from the power source.

The Allen-Bradley 1410-EOB50 heater is a solid-state motor winding heater. Adjustments are not required on the 1410-EOB50 heater to make it work. It belongs to the Bulletin 1410 series of motor protection devices. The 1410-EOB50 heater is designed for use with three-phase AC motors to protect them against the damage which is caused by the build-up of condensation on motor windings in environments with high levels of humidity. The 1410-EOB50 heater should not be used to dry wet/damp motors. The 1410-EOB50 heater can be used with three-phase AC squirrel-cage motors which are controlled by automatic full-voltage starters. The ambient operating temperature range for the 1410-EOB50 heater is 32 to 122 degrees Fahrenheit. Unused 1410-EOB50 heaters should be kept in environments where the ambient temperature is between -13 and 184 degrees Fahrenheit. The approximate power delivered to the motor by the 1410-EOB50 heater is 3 Watts. The 1410-EOB50 heater can be used with motors rated for 25 to 100 Horsepower of output. The voltage rating for the 1410-EOB50 heater is 460 Volts AC. The line frequency rating is 60 Hertz. The 1410-EOB50 heater applies voltage to the motor winding. This winding voltage varies by ±5% for the line voltage variations of +10% to -15%. A metal oxide varistor on the 1410-EOB50 heater protects motors against voltage surges. An RC snubber circuit is also provided to limit the rate of the change of voltages on the circuit. The 1410-EOB50 heater is certified by the CSA and UL standards and it is approved by the CSA and UL 508 standards. The true RMS output current is 15% of the full load current. The dimensions of the 1410-EOB50 heater are 114.3 x 146.1 x 88.9 millimeters.