518ph-12 Murphy Switch Wiring Diagram

Are you having trouble with your 518ph-12 Murphy switch? Don’t worry, we have got you covered. In this journal article, we will discuss everything you need to know about the 518ph-12 Murphy switch wiring diagram. We will provide you with a step-by-step guide that will help you wire your switch correctly. So, let’s dive in!

What is the Murphy Switch?

The Murphy switch is a device that is used to protect diesel engines. It is used to prevent engine damage caused by low oil pressure, high coolant temperature, and overspeed. The 518ph-12 Murphy switch is one of the most popular models on the market. It is used in various applications such as generators, pumps, and compressors.

Low Oil Pressure Protection

The 518ph-12 Murphy switch is designed to prevent engine damage caused by low oil pressure. When the oil pressure drops below a certain level, the switch will break the circuit and shut down the engine. This prevents the engine from running without proper lubrication, which can cause severe damage.

High Coolant Temperature Protection

The switch is also designed to protect the engine from overheating. When the coolant temperature rises above a certain level, the switch will break the circuit and shut down the engine. This prevents the engine from running at high temperatures, which can cause damage to the engine components.

Overspeed Protection

The 518ph-12 Murphy switch also protects the engine from overspeed. When the engine runs too fast, the switch will break the circuit and shut down the engine. This prevents the engine from operating at dangerous speeds, which can cause damage to the engine components.

Wiring Diagram

The wiring diagram for the 518ph-12 Murphy switch is relatively simple. The switch has three terminals: normally open, normally closed, and common. The normally open and normally closed terminals are used to connect the switch to the engine monitoring system, while the common terminal is used to connect the switch to the power source.

Step-by-Step Guide

Here’s a step-by-step guide on how to wire your 518ph-12 Murphy switch:

  1. Identify the power source and the engine monitoring system.
  2. Connect the common terminal of the switch to the power source.
  3. Connect the normally open terminal of the switch to the engine monitoring system for low oil pressure protection.
  4. Connect the normally closed terminal of the switch to the engine monitoring system for high coolant temperature protection.
  5. Test the switch by simulating the engine conditions that trigger the switch.

FAQs

Question Answer
What is the purpose of the Murphy switch? The Murphy switch is used to protect diesel engines from damage caused by low oil pressure, high coolant temperature, and overspeed.
What is the model number of the popular Murphy switch? The 518ph-12 is one of the most commonly used models of the Murphy switch.
What are the terminals of the Murphy switch? The Murphy switch has three terminals: normally open, normally closed, and common.
What happens if the oil pressure drops below a certain level? The 518ph-12 Murphy switch breaks the circuit and shuts down the engine to prevent damage.
How do you wire the Murphy switch? The common terminal is connected to the power source, the normally open terminal is connected to the engine monitoring system for low oil pressure protection, and the normally closed terminal is connected to the engine monitoring system for high coolant temperature protection.

Now that you have a thorough understanding of the 518ph-12 Murphy switch wiring diagram, you can wire your switch with ease. Remember, proper wiring is essential to ensure that the switch functions correctly and protects your engine from damage. If you have any further questions or require assistance with your switch, do not hesitate to contact a professional.