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Maintenance 51
Emerson Energy Systems Rectifier 200I/48NT5C05C Installation and User Manual
Procedure 11 - Calibrating the meter
Step Action
1
Make sure the remote sense leads are disconnected by removing
the corresponding RC− fuse from the controller.
2
Set the VOLT/AMP switch to AMP. Set the output load of the plant
so the rectifier delivers a current of approximately 100 A. Measure
the voltage between VOUT+ and VOUT −, located on the front panel,
with a digital meter.
3
Convert this measured voltage to a current value ( 50 mV
corresponding to 250 A ).
current
= 250 A
voltage 50 mV
If the voltage measured is 20.2 mV :
measured current
= 250 A X ( 20.2 mV ) = 101 A
50 mV
Rotate the CUR CAL potentiometer on the display panel until this
value is displayed.
4
Put the VOLT / AMP switch to VOLT. Adjust the V CAL
potentiometer so that the reading displayed on the meter of the
rectifier is identical to the reading on the digital meter.
5
Put the rectifier to OFF and reconnect the sense leads.
end
6.4. Resetting the rectifier after an HVSD ( high voltage shutdown )
To reset the rectifier after an HVSD condition has occurred execute one of
the steps contained in Procedure 12.
Procedure 12 - Resetting the rectifier after a high voltage shutdown
Step Action
Locally
1
Toggle the ac circuit breaker on the unit itself, or the associated ac
breaker in the distribution panel OFF and ON ( wait until the green ac
ON LED extinguishes before toggling the breaker back to ON ).
Remotely
2
Apply a ground signal at the HVSDR input of the rectifier.
end