Power Systems Instrumentation Checklist
			    12/09/98 JHI



Coil Resistance Measurements

	. inspect Ross relays
		. verify that all terminals and contacts are clean
		. polish contacts if required

	. vacuum the instrumentation racks

	. change air filters and make sure all rack fans are
	  operational

	. verify that 5 amp bus fuses are installed and continuous on
	  the 5 volts source supplies

	. verify that 1/2 amp bus fuses are installed and continuous on
	  the voltage taps across the bus

	. turn on 5 volt supplies and verify readings at PLC
		. note we have a screen to display voltage and current
		  on all coils and commutation resistors
 

Voltage Measurements

	. remove 1/2 bus fuses on voltage taps

	. apply 60 Hz, 100 volt RMS signal across voltage tap leads.
	  Signal should also be digitized through precision voltage
	  divider. 

	. verify proper signal levels through data system 


Current Shunts

	. remove BNC cable from shunt

	. using precision voltage source apply +1, and -1 volts
	  to the cable

	. verify proper signal levels through data system

	. apply 1 kHz, 8 volt p-p,  square wave to cable and send
	  this signal to the data system

	. verify proper signal levels through data system


Bus Rogowski Coils

	. install leads across bus Rogowski (and shunt if possible) to
	  stepdown transformer.  A precision shunt should also be in
	  line with it's signal going to the data system.

	. apply 500 to 700 amps through the Rogowski at 60 Hz

	. verify proper signal level through data system

	. verify proper signal levels through to Hybrid computer


MOV Rogowski Coils

	. install leads across MOV Rogowski to stepdown transformer

	. apply 500 to 700 amps through Rogowski at 60 Hz

	. verify proper signal level through data system



Commutation Rogowskis

	. install leads across MOV Rogowski to stepdown transformer

	. apply 500 to 700 amps through Rogowski at 60 Hz

	. verify proper signal level through data system


Ground Fault Fuses

	. verify the TF center tap ground is connected properly

	. verify that all fuses are continuous with an ohmmeter

	. pop each switch and verify that we get a ground fault alarm
	  in the control room

	. verify fault propagates properly around the power room


Ground Fault Current Pearson Transformers

	. use SCR to dump a 5 to 20 amp, 100 uS long pulse through each
	  Pearson Transformer with a shunt in series.

	. measure current with shunt signal sent to data system

	. verify proper signal level through data system



Reed Switches

	. use a small magnet to check that all the bus reed switches
	  work properly and sound horn

	. check that MOV reed switches latch relays


Hi-Yard Signals

	. Va, Ia							***

Alternator Signals

	. Va, Vb, Vc		 					***
	. Ia, Ib, Ic							***
	. exciter current and voltage
	. field current and voltage
	. varsitor current and voltage					***
	. gound fault current						***
	. stator neutral current					***
	. rotor RPM

Power Room 13.8 Signals

	. verify proper connections to Va, Vb, Vc in power room		***

	. verify proper connections to Ia, Ib, Ic in power room		***

Breakers

	. verify proper operation of breakers				***