What is this symbol

   / What is this symbol #1  

BeezFun

Veteran Member
Joined
Jul 1, 2009
Messages
2,471
Location
IL
Tractor
Kubota B2710
I've got a problem with my boom lift which is 90% hydraulic and 10% electrical, and right now it's the 10% electrical that's not working. A symbol that looks like a capital "Z" appears next to some of the wire traces on the logic diagram for the machine, does anyone know what it means? The machine is made by Nifty Lift which is a British company, so maybe it's something more common on the other side of the pond. Normally Z means impedance, so I'm not sure if they're saying that's a high impedance path around the relay and, if so, what kind of device is providing the impedance.
Here's a small example, I've also included the full diagram so you can see all the places it appears, sometimes sideways.

1743199692601.png


Nifty Lift Electrical Logic Schematic.PNG
 
   / What is this symbol
  • Thread Starter
#2  
I got an answer on Reddit. It's a symbol for a diode, which no one had ever seen before. But given the location is always around a relay, it must be there to prevent the the back emf when the coil is deenergized.
 
   / What is this symbol #3  
I wonder if it's varistor (MOV) for the coil but odd drawing.
 
   / What is this symbol #4  
Diode Symbol is a Triangle with a line across the top..
1743204483441.png
 
   / What is this symbol #7  
That looks like it would be a zener but it's not the symbol for one. Look at the circuit and see what the component looks like.
 
   / What is this symbol
  • Thread Starter
#8  
Once I knew I was looking for a diode I found them on the control board in between and around the relays, but they're hard to see without a good flash.

PXL_20250328_231204442.jpg
 
   / What is this symbol #9  
In electronics, "Z" represents impedance, which is the overall opposition to the flow of alternating current (AC) in a circuit, encompassing both resistance and reactance.
 

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