Hi all, new here but want to share and learn.
Today I was troubleshooting a bottle spacing conveyor that was powered by a powerflex4 drive. I'll start by saying the motors were not wired correctly. I say Motor(s) because 2 motors are being driven with a single drive. The drive is wired to two separate overload devices which then feeds the two motors. While troubleshooting why the motors were not running.....
1. I found the voltage coming out of each overload device to match the Hz on the drive.(480 VAC or so).
2. The 2 motors had quick disconnect plugs AFTER the overload going out to the motors.
3. I had disconnected and taken one apart when I checked continuity between the 3 motor phases(this was how I determined the motor was wired incorrectly).
4. I pulled the cover off the j-box for THE OTHER MOTOR(unknowingly) and started touching things. Shame on me.
5. So I ended up getting whacked by what I assume was 277(one phase terminal) and it hurt allright but I'm wondering if this type of shock depends on how well you are grounded ??? It didn't feel THAT much worse than 120VAC. I think the drive was set just about 60 hz at the time. I'm pretty sure my other arm was on top of the motor, current went through shoulders? Top of chest?
I'm curious to hear some input but if your response starts with "You dumb SOB...." please don't respond.
Thanks
Today I was troubleshooting a bottle spacing conveyor that was powered by a powerflex4 drive. I'll start by saying the motors were not wired correctly. I say Motor(s) because 2 motors are being driven with a single drive. The drive is wired to two separate overload devices which then feeds the two motors. While troubleshooting why the motors were not running.....
1. I found the voltage coming out of each overload device to match the Hz on the drive.(480 VAC or so).
2. The 2 motors had quick disconnect plugs AFTER the overload going out to the motors.
3. I had disconnected and taken one apart when I checked continuity between the 3 motor phases(this was how I determined the motor was wired incorrectly).
4. I pulled the cover off the j-box for THE OTHER MOTOR(unknowingly) and started touching things. Shame on me.
5. So I ended up getting whacked by what I assume was 277(one phase terminal) and it hurt allright but I'm wondering if this type of shock depends on how well you are grounded ??? It didn't feel THAT much worse than 120VAC. I think the drive was set just about 60 hz at the time. I'm pretty sure my other arm was on top of the motor, current went through shoulders? Top of chest?
I'm curious to hear some input but if your response starts with "You dumb SOB...." please don't respond.
Thanks