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Emerson 200I/48-NT5C05C User Manual

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Maintenance   51 
Emerson Energy Systems 
Rectifier 200I/48
NT5C05C   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