Emerson MPR25 Output current monitor, Measurement features Remote rectifier current measurement

Operation 27

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.

25A Switch Mode Rectifier NT5C06B / C Installation and User Manual