
Field Test Power SupplyXCITE
FTPS - 2
2.2. Electrical Control System
TheElectricalControlSystemfor the 1001P Hydraulic Power Supply is pack-
agedintwoenclosures mounted inside the pumpcabinet. Thefirstenclosure
isaccessiblefromthe front panel of the PowerSupplybyremovingfourscrews
and is called “Electrical Control Box #1”. See Drawing B-30223
Thisenclosurecontains the fusesforthesystemdesignated as:
y107FU - 4.0Amp (Fan Motor Fuse)
y108AFU - 6.25Amp (115 Volt Operation Fuse)
y108BFU - 3.2Amp (230 Volt Operation Fuse)
Thesecondenclosure is mounted near thetopofthePower Supply and is only
accessiblebyremovingthe entire pump assembly from the cabinet. This
enclosureiscalled“Electrical Control Box #2” and containsthemotorstarter,
control relays and controltransformer. See Drawing B-30224
During operation, either 115 VAC or 230 VAC single phase power is applied to
themaincontacts of the pump motorstarter;thetimedelayrelay of the cooling
fanandtransformerT1. The voltage selector switch (107PB)selectsoperation
of the entire 1001P Hydraulic Power Supply from either 115 VAC or 230 VAC,
60Hz. Drawing B-30222 and B-30224 depictsthe voltage selector switch inthe
230 Volt position. In this position, voltage is applied to the primary coil of
transformerT-1 and is “stepped” down to115 VAC for operation of all control
relaysandthe Xcite MasterController.
Whenthevoltageselector switch107PBisswitchedtothe 115Vposition,
115 VAC power is applied directly to the control relays and the Xcite Master
Controller. ThePump Motor (MTR1) andtheFanMotor (MTR2) are
automaticallyconvertedto 115V operation by switchingthewindingsof
MTR1andMTR2 with control relays111CRand112CR respectively.
The1001PHydraulic PowerSupplyisstartedwhen the START button onthe
Xcite Master Controller is depressed. 115V control voltage is applied back
throughJ1-Dto the “Remote Emergency StopConnector”(RES);the
“EmergencyStop”button and thentothecoils of motor startercontrolrelays
115Mand116M. Inorderfor voltagetoreachthese control relays, the oillevel/
temperatureandfilterswitches must all be closed. This meansthereissufficient
oilinthereservoir, the oil temperature is lessthan150°Fandtheoilfilteris
clean. Iftheseconditionsareall met, the control relays 115M and 116Mare
energizedandMTR1 and MTR2 are started.