PV-250 Track Relay. Operating Values For Hz PV-250 Track Relay With 115 Volt Local 440 Turn Track Coil

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1 [UNION SWITCH & SIGNAL IL~j 645 Russell Street Service Manual 4574-M Batesburg, SC PV-250 Track Relay Operating Values For Hz PV-250 Track Relay With 115 Volt Local 440 Turn Track Coil Installation, Operation and Maintenance July, 1979 C-7/ , Union Switch & Signal Inc. Printed in U.S.A. An Ansaldo Signal Company

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3 SERVICE OPERATING VALUES FOR 90/83.3 HZ PV-250 TRACK RELAY WITH 115 VOLT LOCAL 440 TURN TRACK COIL Pc. No. N and N342555~8l3* LOCAL AMPERE AT 115 VOLTS, 90 HZ SPEC. EU 5277 MANUAL4574 M Information for adjustment is given in Service Manual Check the current operating values using Figure 17 of Service Manual 5036 with 15 volts or more at the track transformer secondary. This will insure that the resistance in series with the track winding is sufficient to provide suitable phase relations. Test circuit Figure 18 should be used if voltage values are to be checked also. Test circuit figures 19 and 20 may be used instead of Figures 17 and 18, but usually they are less convenient. TABLE 1. TEST OPERATING VALUES FOR 90 HZ Torque Mm. Drop Away Inch-Grains Pick-Up Full Stroke % of Actual PU Volts Amps Volts Amps Shop Field The above values are 13% higher than ideal and apply to test from single phase supply with resistance in series with track winding. It is recommended that relays be taken out of service if the Drop-Away falls below the value shown for field test. TABLE II. OPERATING VALUES AT IDEAL PHASE RELATIONS FOR 90 HZ Pick-U Full Stroke Mm. Drop Away Volts Amps Volts Amps % of Actual PU The above values are based on ideal phase relations, track amperes lead line volts by *These relays are identical except the 813 relays are used w{th a 90 volt local energization. July, / UNION SWITCH & SIGNAL DIVISION AMERICAN STANDARD INC. I SWISSVALE, PA 15218

4 UNION SWITCH & SIGNAL TABLE III. OPERATING VALUES AT IDEAL PHASE RELATIONS FOR 83.3HZ Pick-Up Full Stroke Mm. Drop Away. olts Amps Volts Amps I 2 of Actual PU The above-values are based on ideal phase relations, track amperes leading local volts by TABLE IV. TEST CALIBRATION VALUES FOR 83.3HZ IPick-Up Amps I Full Stroke Amps I Mm. Release I % of Pick U I PERIODIC MAINTENANCE All vital relays must be inspected and tested at least every two (2) years. The tests and inspections are to include: pick up current, drop away current, timing of slow operating and timing relays, visual inspection of contacts for damage or misalignment, corrosion, or other contamination of parts, loose parts inside of cover, broken seal, and cracked or broken cover. ~1 All vital relays installed in locomotive or car carried equipment are to be inspected and tested at least every two (2) years as above. In addition, every four (4) years the relays are to be removed from service and adjusted, repaired and tested. Relays not passing the above stated tests and inspections must be replaced and not returned to service until the operating characteristics and conditions are in accordance with US&S specifications. p. 2, 4574 M

5 MAINTENANCE NOTICE PV-250 AC VANE RELAY Inspection for Loose Counterweights and Loose Trunnion Screw Locknuts This Maintenance Notice covers PV-250 ac Vane Relays manufactured from 1984 to Sept. 1988, and with the following Part Numbers and applicable Service Manuals: RELAY PART NO. N N RELAY MANUAL SM-4574A N SM-4574B N N N SM-4574C N SM-4574D N N N N SM-4574E SM-4574F N SM-4574G N SM-4574H N SM-4574J N SM-4574L N N SM-4S74M N SM-4574N How to find the date of manufacture? Look at the serial number of the relay. In the serial number to be found on the nameplate of the relay, the first two digits stand for the week, and the next two digits stand for the year of manufacture of the relay. For example, serial number was made during the 45th week of 1985, and was the 115th item of its particular part number. UNION SWITCH & SIGNAL INC. A ne.nb~r 01 the ANSALDO Group 5800 CORPORATE DRIVE PIVJSBURGH, PA October, 1988 COPYRIGHT 1988, UNION SWITCH & SIGNAL INC PRINTED IN USA

6 WARNING THE FOLLOWING PROCEDURE INVOLVES THE OPENING OF A VITAL RELAY. THIS PROCEDURE MUST BE PERFORMED BY INDIVIDUALS QUALIFIED TO WORK ON VITAL RELAYS. IF THE FOLLOWING INSPECTION IS TO BE DONE IN THE FIELD. BE CERTAIN TO OBSERVE ALL RULES REGARDING THE SAFE MOVEMENT OF TRAINS BEFORE REMOVING THE RELAY FROM SERVICE. Instructions for inspecting for loose counterweights and loose trunnion screw locknuts: 1. Remove the bottom cover from the relay. This exposes the contact assembly. extreme caution not to disturb the adjustment of the contacts. Remove nameplate access to the counterweight assembly on the vane crank. Exercise to gain 2. Carefully rotate the vane so that the counterweight assembly is visible. This will reveal one or more counterweights, with or without a locknut, on the counterweight screw. 3. As shown in the figure below, check to determine if (a) the counterweight and locknut are tight, (b) at least two threads are visible on the counterweight screw end, and (c) the split screw end is slightly spread apart. Tighten any loose counterweights and locknut. 4. Perform a visual inspection of the relay. Check for rubbing vane, debris inside the relay, and for obviously misaligned contacts. Check to see that the vane is approximately centered and that it has the correct amount of end play (0.010 to inch). Readjust if required. Check the vane for freedom of movement. Check to see that the operating arms, clips and bushings are in their proper position and are free to move. Using a wrench, check the trunnion locknuts for tightness. Tighten any that are loose. 5. Perform an electrical calibration test in accordance with the applicable service manual. If the relay passes the field limit requirements outlined in the service manual, apply glyptal to the exposed threads of the counterweight screw and the trunnion locknut, as shown in the figure below. The relay can then be sealed and placed in service. 6. If the counterweight screw end cannot be spread, or if any of the checks or calibration tests do not pass, send the relay to US&S Service & Repair in Augusta, Georgia for free-of-charge service. REMOVE NAMEPLATE 0 COUNTER- WEIGI-IT [Cfl ASSEMBLY ~/ VANE SI-IAFT r 0 BOttOM VIEW (COVER REMOVED) MAKE SURE TRUNNION LOCKNUT IS flght 00 NOT DISTURB CONTACTS DURING SERVICING U 0 TWO Ti-IREADS EXPOSED (MIN.) 7 APPLY GLYPTAL MAKE SURE LOCKNUT IS TIGHT AGAINST COUNTERWEIGHT COUNTERWEIGHTS WITH LOCKNUT

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