What is 86 on a relay?
Realizing that 85 and 86 are the coil pins, these pins will be transferring the current through the coil. 85 will be used to ground your relay, while 86 will be connected to the switchable power. 87 and 87a will be connected to your controlled accessories that you wish to turn on and off with your relay.
What do the numbers on the bottom of a relay mean?
Numbers of a Relay Note that each pin is numbered. 85 and 86 are the coil pins while 30, 87, and 87a are the switch pins. 87 and 87a are the two contacts to which 30 will connect. If the coil is not activated, 30 will always be connected to 87a. Think of this as the relay in the Normally Closed (OFF) position.
How do you know if a relay is damaged?
Here’s How To Test a Relay
- Locate the relay you need to test.
- The quickest and easiest way to test a relay is to swap it out with a known good replacement.
- Grab a multimeter and set it to Ohms.
- Leave the multimeter on ohms or continuity.
- Energize the electromagnet coil with a 9-12V battery across the pins.
How is pin 30 connected to a relay?
Think of this as the relay in the Normally Closed (OFF) position. When current is applied to the coil, 30 is then connected to pin 87. The great thing about relays is that you can set 87 and 87a to be either open or closed, depending on how you need the switch to work. If you want a closed relay, you will want to wire to 87a.
Where is the NC contact on the 86 relay?
An NC Contact is placed in series, which opens up, when 86 Relay is operated, therby protecting the Operating Coil of the 86 Relay from Continous DC Voltage. Resetting Coil: To Reset the Relay, Resetting Coil needs to be Energised.
Why is the handle on the 86 relay not closed?
The latching nature of the 86 relay means none of these circuit breakers may be closed until someone turns the handle of the 86 relay back to the “reset” position.
What can an 86 lockout relay do for a generator?
A typical application for an 86 lockout relay is in this generator protection system, where a set of three differential current relays (87) sense any imbalance in currents entering and exiting the generator’s stator windings.