Author Topic: MNDiscoPSB power requirements  (Read 81 times)

Trukinbear

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MNDiscoPSB power requirements
« on: October 22, 2020, 03:01:40 PM »
Hi, installing an MNDISCOPSB into my MNSOB3R disco box. It shows being connected to PV+ and PV-. Does it matter if it is connected on the switched side, or the unswitched side (before or after the shutoff switch)?
Thanks,
Bear
SMA Solar Sunny Island SI6048
JA Solar 330W 72 cell panels (18)
Classic 250 (2)
MODBUS/Canbus comm adaptor for Sunny Island
SMA-OG E-panel
WhizBang Jr
MNSPD300V (3)
Atkinson GSCM mini-i
Onan Quiet Diesel QD-8000
Monterey 986Ah 'Big Sur' 24-125-11 48V battery
Off the grid on the PNW coast

Trukinbear

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Re: MNDiscoPSB power requirements
« Reply #1 on: October 23, 2020, 06:03:33 PM »
It is just charging the capacitor anyway... I was just wondering if it used being powered after the switch as part of its confirmation the circuit had been broken.
SMA Solar Sunny Island SI6048
JA Solar 330W 72 cell panels (18)
Classic 250 (2)
MODBUS/Canbus comm adaptor for Sunny Island
SMA-OG E-panel
WhizBang Jr
MNSPD300V (3)
Atkinson GSCM mini-i
Onan Quiet Diesel QD-8000
Monterey 986Ah 'Big Sur' 24-125-11 48V battery
Off the grid on the PNW coast

boB

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Re: MNDiscoPSB power requirements
« Reply #2 on: October 24, 2020, 02:43:44 AM »
The power for remote disconnect should be taken off of the NON battery side. 

 This is so that the trip coil is de-energized after the breaker opens.

K7IQ

Trukinbear

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Re: MNDiscoPSB power requirements
« Reply #3 on: October 24, 2020, 02:45:55 AM »
Thank you.
SMA Solar Sunny Island SI6048
JA Solar 330W 72 cell panels (18)
Classic 250 (2)
MODBUS/Canbus comm adaptor for Sunny Island
SMA-OG E-panel
WhizBang Jr
MNSPD300V (3)
Atkinson GSCM mini-i
Onan Quiet Diesel QD-8000
Monterey 986Ah 'Big Sur' 24-125-11 48V battery
Off the grid on the PNW coast