Zener ECODRIVE 8000 Installation Manual Supplement page 41

ZENER VARIDRIVE SOLUTIONS
[SETUP for a pressure Control System]
Restart DC
Restart DC
AC
550VDC
Restart Delay
Restart Delay
10 Sec
AC
Irradiance Scale
Irradiance scale
1562.5W/m^2
AC
Solar Good Threshold
Solar Good W/m^2
450.0W/m^2
AC
Low Solar Threshold
Low Solar W/m^2
400.0W/m^2
AC
Low Solar Qualification Time
Low Solar Qtime
0 secs
AC
Float Switch Qualification Time
Float SW Qtime
3 secs
Well/Bore Level Clear Delay
DRY Well SW Qtime
10sec
AC
IM00130
The voltage required for the ECODRIVE to restart the motor/pump in solar only operation.
Typically this would be set 20-25VDC higher than array voltage at maximum power. The
Minimum Restart DC allowable is the Vmp setting.
The time delay that the 'Restart DC' voltage or 'SOLAR GOOD' condition must be present for
the ECODRIVE to restart the motor/ pump. 'SOLAR GOOD' is set by the 'SOLAR GOOD
THRESHOLD' . If an irradiance sensor is fitted in solar only operation, this may need to be
extended to lengthen the time between starts during sunrise and sunset. This time will
reduce the number of occasions the system transitions from solar power to AC power.
Alternatively an irradiance sensor can be used.
This should have been checked previously. An irradiance sensor is not required for solar
only applications. See page 25 for more details.
(Irradiance sensor fitted)
The irradiance threshold above which solar power is sourced is determined by the "Solar
Good" threshold. This level activates (after restart delay time) solar only operation when
an irradiance sensor is used.
(Irradiance sensor fitted)
The irradiance level which an auxiliary AC and PV power is sourced is determined by the
"Low Solar" threshold value. When the irradiance level is below this value, a relay output
(relay 2 – LO SOLAR) provided to control the Auxiliary AC power Supply will de-energise.
The difference between Solar Good and Low solar is the hysteresis between 'solar' & 'AC'
operation. This parameter is not used if an irradiance sensor is not fitted (for Solar only
operation).
(Irradiance sensor fitted and solar only)
The e conditions to start sourcing AC power must be maintained for a time interval called
the "Low Solar Q-time". Low solar Q time is also used in solar only operation without an
irradiance sensor. When tracking is active and operating below minimum speed for this
qualification time, the ECODRIVE will stop the pump. This time must be shorter than the
low speed trip time.
(Not required for Pressure Control - link terminal 1 to 3[D2])
The float switch qualification time is the 'off' delay when the switch changes to open state.
The pump will run when contact closes. This delay also reduces the occurrence of
momentary switching due to disturbances of the liquid surface.
The delay to restart the pump after a bore low signal is received.
P a g e
ZENER ECODRIVE® 8000
| 39 20/07/2018 3:59 PM