Relay showing voltage while contacts open

  • Thread starter Thread starter Physicist3
  • Start date Start date
  • Tags Tags
    Relay Voltage
Join the discussion
Registration is free. Ask a follow-up in this thread, or start your own.
2 replies · 2K views
Physicist3
Messages
103
Reaction score
0
Hi, I am simulating a switch system on multisim which I have constructed using a normally open contact relay. The problem I am having is that before the coil is energised, I am observing about 15mV on the main circuit side when the contacts are supposedly open. Is this normal? When the coil is energised and the contacts close, the voltage raises to the value of the supply as would be expected?
 
Engineering news on Phys.org
Physicist3 said:
Hi, I am simulating a switch system on multisim which I have constructed using a normally open contact relay. The problem I am having is that before the coil is energised, I am observing about 15mV on the main circuit side when the contacts are supposedly open. Is this normal? When the coil is energised and the contacts close, the voltage raises to the value of the supply as would be expected?

Can you post a screenshot of the schematic? If you explicitly set the Initial Conditions with 0V on that side before starting the simulation, does it stay zero for some time before you close the relay? Is it just a floating node, or is there something connected to it?
 
If it is a solid state relay it could be leakage. What is your relay model?