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Emerson MPR15 Series User Manual

Page 27

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Operation 27

25A Switch Mode Rectifier

NT5C06B / 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.

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