I have 2 H3Y-4 time delay relays that I am trying to wire into a circuit. The relays are 4PDT and suitable for AC/DC 24 to 220Volt. They are the same configuration as a standard MY4N relay and use a PYF-14A base. I am using these relays in a circuit to control an electric hoist in my workshop. The hoist is 3 phase 220 volt and I am powering it from a VFD with 220 Volt single phase input. The hoist has a control power transformer in it to drop the voltage to 110 volts and I am using that 110 volts for the hoist UP/Down buttons. I am using a normally open contacts on a standard MY4-N 110 volt relay to start the VFD output to the motor when the up or down button is pushed. It takes approx. second before the VFD actually starts the hoist motor turning so I need to delay the power to release the hoist motor brake for 1 second so the brake is not released before the motor is ready to start running.

I want to use these time delay relays in the circuit so that the 110 volt signal the starts the VFD through the MY4-N relay also start the time delay relay and its normally open contacts close 1 second later. I am not sure how to wire the relays based on the diagrams that came with them. See pics of the relays and wiring diagram below. There are 2 diagrams with different wiring but not sure what the difference is and how I need to wire the relays.
i have looed for a more detailed manual for these on line with no luck

If anyone is familiar with wiring these relays I would appreciate feedback on how to wire them so that a 110 volt input will close a NO (normally open) contact after the set time (approx 1 second) is reached and the relay will reset when the 110 volt input is removed.

 

I want to use these time delay relays in the circuit so that the 110 volt signal the starts the VFD through the MY4-N relay also start the time delay relay and its normally open contacts close 1 second later.

Assuming the relay and brake motor operate on 110Vac it would be wired as below.

 

Thanks for the info - I will give that a try. The brake is actually 220 Volt but the contactor in the hoist that powers the brake has a 110 volt coil so it should work the way you have shown if I wire the contactor coil in the location you have "brake motor"

 

Follow up to previous reply - I have used time delay relays before with the small dial on top to set the delay time but never one with a digital display. One of the concerns I had was was whether the digital relay with LCD display needed power to the coil all the time independent of the circuit that is being controlled to maintain the settings.

The question that just crossed my mind is do I have to set up a way to temporarily power to be able to make the settings for mode and delay time using the buttons on the top of the relay without powering the whole circuit and running the VFD and the hoist ?

 

The question that just crossed my mind is do I have to set up a way to temporarily power to be able to make the settings for mode and delay time using the buttons on the top of the relay without powering the whole circuit and running the VFD and the hoist ?

I believe so. Shouldn't be too hard to connect 110Vac to the power input and then program as needed.
Must have an eeprom in the circuit to maintain the settings when activated as I see no mention of an internal battery.

 

I believe so. Shouldn't be too hard to connect 110Vac to the power input and then program as needed.
Must have an eeprom in the circuit to maintain the settings when activated as I see no mention of an internal battery.

I have a few extra relay bases - The simplest and safest it probably to use one with a 110 volt power cord wired to the coil and plug it in a standard outlet. I can use that to program the relays and then plug them back into control panel.

 

My observation and use of industrial hoists powered with three phase motors is that there is no delay added. So I am suggesting caution.

Now, reading post #1 again, I see that the TS is switching a 3-phase Variable Frequency Drive to power the motor, and switching the drive on and off for motor control. Every industrial hoist operates the brake release at the same time as the motor power is applied. No time delay.
So the solution is to use the voltage applied to the motor to release the brake, instead of the enabling of the VFD power.
Did the 110 volt transformer originally operate the brake release??
Releasing the brake without motor power on has the potential for damages or injuries.

 

If you read the last sentence in the first paragraph in post #1 you will find the answer.

 

Releasing the brake without motor power on has the potential for damages or injuries.

Exactly, which is why the delay is required on the brake.
From post #1:
"It takes approx. second before the VFD actually starts the hoist motor turning so I need to delay the power to release the hoist motor brake for 1 second so the brake is not released before the motor is ready to start running."

 

If you read the last sentence in the first paragraph in post #1 you will find the answer. I have read that post several times, and I understand that the VFD has a startup delay. .
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Is there a reason to not use the power OUTPUT from the VFD to also power the brake release?? That would assure that motor power was applied at the same time as the brake was released. OR is it that the VFD is set for a much slower speed?

NOTE that I am NOT suggesting release the brake when power is applied to the VSD, but to release the brake when the power is actually present at the motor. So now I ask again, the same question: "Did the 110 volt transformer originally operate the brake release?? " Does the brake release require 110 volts AC or does it operate on 220 volts AC??
My concern is both for safety, AND to avoid the situation of excess delay on the brake release, and the motor trying to start with the brake still engaged.

One more thought is about how the hoist was originally configured for the brake release to operate. I am guessing that the TS purchased the hoist used, and that is why the motor is three phase, instead of being a "permanent split capacitor" type of motor.

 

The brake release runs on 220 but has a contactor that activates on 110.
The TS said:
"The hoist is 3 phase 220 volt and I am powering it from a VFD with 220 Volt single phase input"
"It takes appx 1 second before the VFD actually starts the hoist motor turning"
If the VFD has a "programmable" relay output it's possible that could be used to activate the brake release.

 

OK, and now I see a concern that the VFD may not have enough capability to power both the brake release and the phase of the motor. But still, using the same power to release the brake is the way to go. There are schemes available to get around an adequate capability from the VFD.
So please let us know abot the motor current, the brake current, and the VSD output current rating.