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Operation 27
25A Switch Mode RectifierNT5C06B / C Installation and User Manual
Output current monitor
The rectifier monitors the output current. The unit will initiate an RFA alarm
when no output current (see Note below) is detected during parallel
operation.
Note:
Give an alarm at no load condition, only for the following
releases or under.
NT5C06BB, BB-1, BB-3, BC Rel.10
NT5C06CA, CA-1, CA-3, CA-5, CC Rel.10
NT5C06CB, CB-1, CB-3, CD Rel.12
NT5CO6CE-61(-46) Rel.12
Measurement features
Remote rectifier current measurement
The rectifier is equipped with a 50 mV / 25 A shunt connected on the
positive lead, near the output terminals. The shunt signal is available on the
signal connector (see Figure 3).
Test points (V+, V-)
Voltage jacks are provided for measuring the voltage at the point of
regulation.
Control features
Remote ON/OFF control
When a ground signal is applied to the 'Temporary Release' (TR) input, the
rectifier inhibits its operation and activates the rectifier's RFA. Upon removal
of the remote ground signal the rectifier returns to normal operation.
Remote high voltage shutdown
In addition to the local high voltage shutdown feature, the power plant
controller can shut down any rectifier by sending a high voltage shutdown
signal, ground (BAT RTN) pulse. The rectifier will shut down if it is
supplying more than 10% of its full load rating.