Rectifier
Rectifier Installation
Installation Manual
Manual
Page
Page 4
4 of
of 13
13
1.3
1.3
Power
Power and
and Current
Current Limit
Limit
The rectifier automatically limits its output
The rectifier automatically limits its output as load demand reaches it maximum capacity.
as load demand reaches it maximum capacity. The figures
The figures
below show the maximum operating envelope for the RM848 and for low power version RM648 rectifier.
below show the maximum operating envelope for the RM848 and for low power version RM648 rectifier.
1.4
1.4
Output
Output Over-Voltage
Over-Voltage Shut
Shut Down
Down
The rectifier will automatically shutdown if the output voltage exceeds the preset value. The Over Voltage
The rectifier will automatically shutdown if the output voltage exceeds the preset value. The Over Voltage
Shut Down point reduces by about 0.5V at full load to ensure the rectifier producing the Over Voltage Shut
Shut Down point reduces by about 0.5V at full load to ensure the rectifier producing the Over Voltage Shut
Down turns off first. The Over Voltage Shutdown voltage is preset in the factory but may be adjusted.
Down turns off first. The Over Voltage Shutdown voltage is preset in the factory but may be adjusted.
1.5
1.5
Input
Input Over/Under
Over/Under Voltage
Voltage Shut
Shut Down
Down
If the input voltage is outside the specified range, the rectifier may shut down until the voltage returns
If the input voltage is outside the specified range, the rectifier may shut down until the voltage returns
within the specified range.
within the specified range.
1.6
1.6
Rectifier
Rectifier Soft
Soft Start
Start and
and Inrush
Inrush Current
Current
On start-up, the peak mains inrush current is limited to twice the maximum operating current. The output
On start-up, the peak mains inrush current is limited to twice the maximum operating current. The output
voltage and current will rise slow
voltage and current will rise slowly from zero during start-up.
ly from zero during start-up. This means that the AC input
This means that the AC input power slowly
power slowly
increases over a 2 second period, providing a gentle load characteristic for any standby generators.
increases over a 2 second period, providing a gentle load characteristic for any standby generators.
1.7
1.7
Over
Over Temperature
Temperature Turn
Turn Down/Shutdown
Down/Shutdown
When the rectifier reaches its maximum operating temperature (internal), the rectifier will progressively
When the rectifier reaches its maximum operating temperature (internal), the rectifier will progressively
reduce the output current to attempt to reduce the heat within the unit. In extreme circumstances, the
reduce the output current to attempt to reduce the heat within the unit. In extreme circumstances, the
rectifier internal temperature may continue to rise even
rectifier internal temperature may continue to rise even with reduced output current.
with reduced output current. In this case the
In this case the
rectifier will totally shutdown and will restart when the internal temperature returns within limits.
rectifier will totally shutdown and will restart when the internal temperature returns within limits.
The maximum ambient operating temperature range at full power is: -10 to 50 ºC.
The maximum ambient operating temperature range at full power is: -10 to 50 ºC.
The rectifier will operate in ambient temperatures up to 70ºC but the rectifier will de-rate its output power to
The rectifier will operate in ambient temperatures up to 70ºC but the rectifier will de-rate its output power to
keep internal temperatures within the allowable range.
keep internal temperatures within the allowable range.
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Output Current
Output Current
Current
Current
Limit
Limit
58
58
48
48
Operating envelop for RM848
Operating envelop for RM848
Normal Rectifier Operating Zone
Normal Rectifier Operating Zone
16.6
16.6
13.8
13.8
Operating envelop for RM648
Operating envelop for RM648
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58
58
48
48
Output Current
Output Current
12.5
12.5
10.3
10.3
Current
Current
Limit
Limit
Normal Rectifier Operating Zone
Normal Rectifier Operating Zone