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Cutler-Hammer HWT-500, Инструкция по эксплуатации

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35-557 

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GENERAL OPERATING INFORMATION 

 
 

 

 

 

 

WARNING

 
 

ANY MECHANICAL OR ELECTRICAL MODIFICATION TO ANY NETWORK PROTECTOR 
REQUIRES THAT THE NETWORK PROTECTOR BE GIVEN APPROPRIATE ELECTRICAL 
TESTS, USING PROPERLY MAINTAINED TESTING DEVICES, BEFORE PLACING INTO 
SERVICE.  FAILURE TO PERFORM SUCH ELECTRICAL TESTS CREATES CONDITIONS 
LEADING TO THE POSSIBILITY OF DEATH, SEVERE PERSONAL INJURY AND/OR 
PROPERTY DAMAGE. 

 
1.  The Type HWT-500 test set is equipped with selector switches and controls to vary both the 

overvoltage phasing value as well as the reverse current magnitude at various preselected 
angles.  Refer to pages 8-10 regarding the control panel layout and description of the controls. 

2.  The HWT-500 is equipped with a single lamp PHASE SEQUENCE indicator that becomes 

energized when the supply cables are attached to an energized voltage source, and the supply 
switch is at the 216 or 480V.  This permits immediate verification of the correct sequence.  An 
illuminated lamp indicates that the system sequence is incorrect.  Periodically check the lamp by 
purposely connecting the input supply leads incorrectly. 

3.  An electrical interlock is built into the HWT-500 that prevents the possibility of 480 volts entering 

the test set when the SUPPLY switch is in the 216 position.  Moving the red SUPPLY switch to 
the 216 position when 480 volt potential is present at the supply leads of the test set will result in 
the electrical shutdown of the test set. 

4.  The position of the SUPPLY switch (480 or 216) refers to the system voltage of the network 

protector being tested.  The 216 position is to be used with network voltages up to 216 volts that 
are either wye or delta connected.  The 480 position is to be used with network voltages of 480 
volts that are either wye or delta connected.  A protector used on 480-volt systems may or may 
not utilize 480-volt class relays.  Regardless of the fact, all 480-volt network protectors are to be 
tested with the red SUPPLY switch in the 480 position. 

 
 

CAUTION

 
 

ON DELTA SYSTEMS THE TEST SET LEADS MARKED NEUTRAL MUST BE CONNECTED TO 
AN EARTH GROUND FOR CORRECT OPERATION OF TEST SET CIRCUITS.  ON WYE 
CONNECTED SYSTEMS BOTH THE NETWORK PROTECTOR ENCLOSURE AND THE 
NETWORK PROTECTOR BREAKER MUST BE GROUNDED. 

 
5.  Before any testing shall commence, the network protector breaker must be in the disconnected 

and rolled out position, with the main breaker contacts in the OPEN position.  Proceed to 
connect the test control cables to the test set and to the network protector.   

 
Insure that the SUPPLY switch is placed in the “OFF” position.  Connect the SUPPLY LEADS to the 
source voltage.  Check that the PHASE SEQUENCE indicator light is “OFF” indicating that the 
sequence input is correct.  Using the SUPPLY VM switch, a check of the input supply voltages 
should be made to insure that the input supply is balanced, both phase-to-phase and phase-to-
ground. 
 
6.  The HWT-500 controls the phasing volts and reverse current through the use of the three phase 

VARIAC. 

Содержание HWT-500

Страница 1: ...ctor Portable Test Set READ AND UNDERSTAND THESE INSTRUCTIONS BEFORE ATTEMPTING ANY MAINTENANCE OF THE NETWORK PROTECTOR SEE IMPORTANT DISCLAIMER OF WARRANTIES AND LIMITATION OF LIABILITY ON NEXT PAGE Cutler Hammer 2210 Highway 72 221 East Greenwood SC 29649 Effective July 2001 ...

Страница 2: ...o the user in contract in tort including negligence strict liability or otherwise for any special indirect incidental or consequential damage or loss whatsoever including but not limited to damage to or loss of use of equipment plant or power system cost of capital loss of profits or revenues cost of replacement power additional expenses in the use of existing power facilities or claims against th...

Страница 3: ... 32 SSNPR Close Test 33 WESTINGHOUSE SSNPR Trip Test 34 SSNPR Phase Detection Test 34 Individual Relay Test 16 Mechanism Components Test 36 CN 33 Master Relay Overvoltage Test 16 HWT 500 Maintenance and Repair 38 CN 33 Master Relay Reverse Current Trip Test 17 Table 1 Suggested Relay Settings 39 CN 33 Single Phase Reverse Current Trip Test 19 Table 2 Renewal Parts 41 CNJ Phasing Relay Overvoltage ...

Страница 4: ...ever if a network protector or a simulated network protector breaker is used with this test set scales of the digital meters on the test set are such that network relays can be calibrated at a service center or laboratory NOTE VOLTAGES AT SERVICE CENTERS OR LABORATORIES MAY NOT BE EQUIVALENT IN VOLTAGE MAGNITUDE OR VOLTAGE BALANCE BETWEEN PHASES AS COMPARED TO THE VOLTAGES FOUND IN MOST NETWORK LO...

Страница 5: ...rk protector present numerous potential unsafe conditions including but not limited to the following Improper Operation Lethal Voltages Moving Parts Heavy Components Specialized procedures and instructions are required and must be adhered to when working on such apparatus WARNING AFTER THE TEST SET HAS BEEN COMPLETELY CONNECTED AND IS IN OPERATION POTENTIALLY LETHAL VOLTAGES ARE PRESENT WITHIN THE...

Страница 6: ...e wheels on the bottom end of the unit and aids in the balance of the unit when it comes to rest on the floor of the vault Likewise when manually lifting the unit always use the main body end handles DANGER DO NOT ATTEMPT TO LOWER THE HWT 500 BY ATTACHING SLINGS OR ROPES TO THE RETRACTABLE HANDLE ASSEMBLY TO DO SO MAY CAUSE THE RETRACTABLE HANDLE ASSEMBLY TO PERMANENTLY DISENGAGE RESULTING IN DEAT...

Страница 7: ...the test set will result in the electrical shutdown of the test set 4 The position of the SUPPLY switch 480 or 216 refers to the system voltage of the network protector being tested The 216 position is to be used with network voltages up to 216 volts that are either wye or delta connected The 480 position is to be used with network voltages of 480 volts that are either wye or delta connected A pro...

Страница 8: ...ht Sequence Light Ammeter Red Indicating Light Voltmete Phasing Volt Switch Supply Voltmeter Switch Function Phasing Switch I PV Switch Current Phasing KTKR 15 Fuse Holders Green Indicating Light Single Phase Switch Variac Supply ...

Страница 9: ...5 557 9 of 45 DANGER IT IS VERY IMPORTANT TO RETURN THE VARIAC TO 0 AFTER THE COMPLETION OF EACH OPERATION FAILURE TO FOLLOW THIS WARNING WILL RESULT IN DAMAGE TO VARIAC INSULATION P1 and P2 Cable Assemblies ...

Страница 10: ...ights are used in conjunction with the COMM RED GREEN marked leads These are intended to be used with dry contacts WARNING DO NOT USE THE LEADS MARKED COMM RED GREEN ON ENERGIZED CIRCUITS PHASING SWITCH determines the phasing voltage phasor angle with respect to the network voltage in the 0 and 60 degree position It also determines the reverse current angle with respect to the individual phase vol...

Страница 11: ...REEN Red and Green indicating lamp leads COMM CLOSE TRIP Mechanical Test leads N GRD Housing neutral or ground lead 30 Foot Cable Assembly for Socket P1 NA NB NC Network side breaker leads TA TB TC Transformer side breaker leads N GRD Breaker neutral or ground lead WARNING DO NOT USE THE LEADS MARKED COMM RED GREEN ON ENERGIZED CIRCUITS ...

Страница 12: ... position and that the VARIAC is turned to the OFF position 4 Connect the Network side test leads to the removable breaker These leads are marked NA NB and NC 5 Connect the Transformer side test leads to the removable breaker These leads are marked TA TB and TC 6 Connect the Neutral ground lead to a ground point on the rollout unit 7 Connect the Neutral ground lead to a suitable grounding point in...

Страница 13: ...egree position 23 Place the I PV Switch to any one of AI BI or CI positions 24 Turn the VARIAC knob clockwise to slowly increase the reverse current When the protector trips observe the value of the trip current on the Ammeter and return the VARIAC to the zero position 25 If the network protector relay is found to be within your specified calibration you can proceed to the Mechanical Component Tes...

Страница 14: ...on PHASE switch 60 position Single PH Test Switch OFF position PHASING volt switch ON position VARIAC zero position SUPPLY Switch 216 or 480 position depending on network system voltage By increasing the VARIAC S position you can increase the overvoltage phasing value to the desired value or to that value at which the network protector breaker will close its main contacts The network protector bre...

Страница 15: ...stent When making the overall tripping test on a network protector breaker equipped with an electro mechanical de sensitizing relay connections to the test set network protector breaker and power source as well as the switch positions remain the same The reverse current is slowly increased from zero until the relay trip contact makes This is the reverse current required to trip the breaker As soon...

Страница 16: ...F position PHASING volt switch ON position SUPPLY Switch 216 or 480 position depending on network system voltage VARIAC zero position By increasing the VARIAC S position you can increase the in phase zero degrees overvoltage phasing value to the desired overvoltage close value The CN 33 relay overvoltage setting may be adjusted through the use of a narrow blade screwdriver inserted in the overvolt...

Страница 17: ...ch 180 position Single PH Test Switch OFF position SUPPLY Switch 216 or 480 position depending on network system voltage VARIAC zero position By increasing the VARIAC S position you can increase the reverse current value to the desired reverse current value The CN 33 master relay reverse current adjustment screw is designed to interface with a series of three leaf springs hung below the moving con...

Страница 18: ...WORK PROTECTOR BREAKER THROUGH THE SUPPLY SWITCH ONCE ALL TOOLS HAVE BEEN REMOVED FAILURE TO FOLLOW THESE INSTRUCTIONS COULD LEAD TO DEATH SEVERSE PERSONAL INJURY AND OR PROPERTY DAMAGE The GREEN indicator lamp will illuminate when the CN 33 trip contact makes When this test is performed the BN de sensitizing relay the BN dummy plate or the BN jack plate must be present to complete the current coi...

Страница 19: ...he black handle of the single phase selector switch from the OFF position to A phase or the same phase as selected on the I PV switch 4 Increase the VARIAC until the relay calls for a trip The typical single phase values should be approximately three times the nominal three phase setting For example if your nominal three phase reverse current setting is 3 2 amps then the single phase value should ...

Страница 20: ...indicator light is illuminated It is important that the CNJ relay contact is open at zero phasing volts and closes its contact at your predetermined overvoltage close value This will ensure that a positive value of phasing volts is required to close the contact Otherwise and incorrectly set phasing relay may permit the network protector breaker to close on lagging phasing voltage which in turn can...

Страница 21: ...pp VM Switch CA position PHASE switch 180 position Single PH Test Switch OFF VARIAC zero position SUPPLY Switch 216 or 480 position depending on network system voltage BN DE SENSITIZING RELAY TIME DELAY TEST With the full compliment of relays in place CNJ CN 33 BN rapidly increase the reverse trip value above the nominal CN 33 trip value Start the timing of the BN the moment the CN 33 trip contact...

Страница 22: ...rough the primary winding of the current transformers on the network protector breaker any setting within the range of the relay can be obtained by utilizing the VARIAC When the test current is passed directly through the primary winding of the current transformers 5 amperes represents 100 load current The BN relay instantaneous trip elements are non directional so direction of current flow is imm...

Страница 23: ...For example you must know whether the motor is connected phase to phase or phase to ground as well as the trip device This information can best be obtained from the wiring diagram of the network protector breaker under test For mechanical closing operation the Supply VM switch should be in the CA position and should read near zero potential with the VARIAC at zero This is based on breakers that ha...

Страница 24: ...ear comparison can be made Slow deterioration of the motor or trip device can be observed over the years by making such comparisons Pin pointing such problems in advance can lead to lower maintenance costs over the life of the equipment Rated Voltage L L Or L G Control Relay Closing Motor 80 106 78 106 Tripping Voltage 7 5 106 125 216 L L 170 230 157 230 16 230 277 480 L G 220 295 200 295 36 510 2...

Страница 25: ...I B 35 557 25 of 45 THIS PAGE IS BLANK ...

Страница 26: ...eaker with the setting pendant connected into the RS 232 port Calibration of the MPCR or MPCV Relay must be made with three phase potential and only after the FLOAT light is illuminated At the end of the calibration sequence the pendant must be removed prior to operation of the breaker Close Test By rotating the VARIAC you can increase the overvoltage phasing value to the desired value at which th...

Страница 27: ...al the FLOAT light will again be illuminated The network protector breaker should be tripped several times to ensure that the operation is consistent For testing the MPCR or MPCV DO NOT remove any of the relay terminal screws or connect the COMM RED GREEN cable assembly To do so will not permit the relay to receive its required input signals Phase Detection Test All of the switch positions remain ...

Страница 28: ...pe Can CHN or CAL CHL These test determine if the relays on a network protector breaker type CAN or CHN master relay CAL or CHL phasing relay are functioning properly and their setting in regard to overvoltage close reverse current trip time delay and instantaneous trip is correct ...

Страница 29: ...AS ATTACHED DO NOT USE THE LEADS MARKED COMM RED GREEN ON ENERGIZED CIRCUITS ENERGIZING THESE LEADS MAY DAMAGE THE TEST SET Switch Positions Network protector open and set for automatic operation FUNCTION Switch RELAY position I PV Switch PVA position Supp VM Switch CA position PHASE switch 0 Single PH Test Switch OFF VARIAC zero position PHASE volt switch ON position SUPPLY Switch 216 or 480 posi...

Страница 30: ...ch 216 or 480 position depending on network system voltage By rotating the VARIAC you can increase the reverse current value to the desired reverse current value The green indicator lamp will illuminate when the CAN or CHN trip contact makes The trip adjustment on the type CAN or CHN relay is accomplished by turning the mechanical restraint cap NOTE On network protectors equipped with the delayed ...

Страница 31: ...er does not have to be in the automatic mode FUNCTION Switch RELAY position I PV Switch AI position Supp VM Switch CA position PHASE switch 180 position Single PH Test Switch OFF VARIAC zero position SUPPLY Switch 216 or 480 position depending on network system voltage Rotate the VARIAC and increase the reverse current trip value until the CAN or CHN relay trip contact makes The timing cycle of th...

Страница 32: ...ions Network protector open breaker does not have to be in the automatic mode FUNCTION Switch RELAY position I PV Switch PVA position Supp VM Switch CA position PHASE switch 60 position Single PH Test Switch OFF VARIAC zero position PHASE volt switch ON position SUPPLY Switch 216 or 480 position depending on network system voltage By rotating the VARIAC you can increase the overvoltage phasing val...

Страница 33: ... LEADS Switch Positions Network protector open and set for automatic operation FUNCTION Switch RELAY position I PV Switch PVA position for close AI for trip Supp VM Switch CA position PHASE switch 0 position for close 180 for trip Single PH Test Switch OFF VARIAC zero position SUPPLY Switch 216 or 480 position depending on network system voltage NOTE Make certain that the phasing adjustment of the...

Страница 34: ...he network protector breaker must be closed and the I PV switch must be changed to AI position By rotating the VARIAC you can increase the reverse current value to the desired value at which the network protector contacts open This value becomes the trip current setting of the SSNPR If this value is not correct and you wish to change the reverse trip setting the following steps are necessary A Set...

Страница 35: ...st Optional The test connections are the same as shown on page 33 Switch Positions Network protector closed and set for automatic operation TEST Switch RELAY position I PV Switch AI position Supp VM Switch CA position PHASE switch 180 position VARIAC zero position not used in this test SUPPLY Switch 216 or 480 position depending on network system voltage NOTE Make certain that the phasing adjustme...

Страница 36: ...est be obtained from the wiring diagram of the network protector breaker under test For mechanical closing operations the Supply VM switch should be in the CA position and should read zero This the based on breakers which have the closing motor wired A B phase to phase and the reading on the VOLTMETER reflects voltage applied between cable terminal TA and TB Closing values for both line to line an...

Страница 37: ... can be made Slow deterioration of the motor or trip device can be observed over the years by making such comparisons Pin pointing such problems in advance can lead to lower maintenance costs over the life of the equipment Rated Voltage of Network Protector L L Control Relay Closing Motor 90 106 73 106 Tripping Voltage 7 106 Percent 125 216 L L 170 230 157 230 16 230 277 480 L G 220 295 200 295 36...

Страница 38: ...ssembly or are located within the body of the test set case To gain access into the case 1 Remove the qty 4 20 bolts located at the left and right hand side of the front panel 2 Remove the qty 4 28 bolts used to secure the VARIAC to the front panel assembly These are located outside the VARIAC circular dial plate 3 Remove the VARIAC knob using a 3 32 Allen wrench Note there are two set screws secu...

Страница 39: ...losed Trip contact makes at 0 2 of protector current transformer rating Overvoltage close at 0 degrees protector breaker open Close contact makes at 1 5 volts Phasing Relay Overvoltage close at 60 degrees protector breaker open Contact open at 0 0 volts IMPORTANT Contact closed at 0 5 volts 480Y 277 Volt Network Protectors Master Relay Reverse current at 180 degrees protector breaker closed Trip c...

Страница 40: ... protector current transformers and their ratios may have been changed at the time of manufacture upon request or may have been changed after installation Ampere Protector Ratings CT Ratio Ampere Suggested Trip Setting at 180 800 800 5 1 6 1200 1200 5 2 4 1600 1600 5 3 2 1875 1600 5 3 2 2000 2000 5 4 0 2250 2000 5 4 0 2500 2500 5 5 0 2825 2500 5 5 0 3000 3000 5 6 0 3500 3000 5 6 0 4500 3000 5 6 0 ...

Страница 41: ...DT0286H01 Ammeter NDT0256H01 Voltmeter NDT0258H01 Ammeter CT PCB NAS0082G01 Sequence Lamp PCB NAS0081G01 150 Ohm Res Assembly NAS0114G01 R1 Relay D15CR13BB LTX Txfr C0050E3A CPT 467 300 3 PH Variac 226U 3 48V lamp Assembly 10250T208N Red lens 10250C1N Green Lens 10250C2N Yellow Ind Lamp 10250T34Y Green P B 1025023G Red P B 10250T23R 30 P1 Cable Ass y NAS0119G01 30 P2 Cable Ass y NAS0119G02 P1 Prot...

Страница 42: ...I B 35 557 42 of 45 ...

Страница 43: ...I B 35 557 1 of 45 RELAYMODULEWIRING 216V Relay Module Wiring ...

Страница 44: ...I B 35 557 2 of 45 ...

Страница 45: ...I B 35 557 3 of 45 RELAYMODULEW IRING 480Volt Relay Module Wiring ...

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