KRPA-14AN-12

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Power relays are electrical switches that control the flow of current in an automated system. The KRPA-14AN-12 is part of this family of power relays, designed to handle electrical loads over two amps. The unique features of this unit allow it to be used both as an on/off switch and a trigger device.

The KRPA-14AN-12 operates as an on/off switch by utilizing a latching relay. This type of relay is the combination of two single-pole, double-throw (SPDT) switches, connected so that the current that flows through one switch is used to activate the other switch. When current is applied to the control circuit, the first SPDT switch closes, which then causes the second SPDT switch to open. When the current is removed from the control circuit, the first switch reverses its action and the second SPDT switch closes and the circuit is made again.

When used as a trigger device, the KRPA-14AN-12 circuit is designed to activate external devices, such as fuel pumps, fans, valves, and other electrical equipment. The trigger device features a hysteretic voltage detection circuit, which allows it to detect small voltage changes in the control circuit. As the voltage begins to drop, the circuit initiates action to close the external device, ensuring that it remains off until the voltage increases to the proper level. When the voltage returns to the correct level, the circuit will open the external device again, ensuring it remains on until the voltage drops again.

The KRPA-14AN-12 also features a swivel base and an adjustable fuse holder, allowing the unit to be used in a range of locations with varying levels of access. This makes it ideal for installations in tight spaces or areas where a more conventional relay would be difficult to access.

Overall, the KRPA-14AN-12 is a versatile, reliable relay device, designed to control the flow of current in automated systems. With its two-amp rating and trigger device features, the unit is perfect for controlling a variety of small to medium-sized exterior devices.

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