PV-250 POWER-OFF RELAY V, 75 HERTZ WITH N WITH 6F-4B CONTACTS * * * * * * * *

Transcription

1 \NABCC An American-Standard Company SERVCE MANUAL 4574 H PV-250 POWER-OFF RELAY V, 75 HERTZ WTH N WTH 6F-4B CONTACTS * * * * * * * * This relay is similar to track relays except as follows: 1. t has a high impedance control winding designed to operate with an 8,000 ohm rsistor in series. 2. The initial pressure of the_ front and back contact springs is to be 12 grams (6 grams each tip) instead of 20 grams (10 grams each tip). 3. When the vane is just touching the lower roller stop, the front contacts should have 0.050" opening instead of 0.555" opening. n testing this relay, an 8,000 ohm resistor ±3% should be connected in series with the control element and the control and local connected together as shown in Figure 1. The relay should then be tested as a single element relay per Figure 12 of Service Manual The pick-up should be within plus O, minus 5% of the value given and the full stroke within plus O, minus 10%. The current operating values need only agree approximately with the value given in the table. Cl L+ L-,--..a.. T+ Cl+ C ±3%.n. Figure 1 Rear View of Mounting Base June, 1977 B UNON SWTCH & SGNAL DVSON WESTNGHOUSE AR BRAKE COMPANY Swissvale, PA 15218

2 WASCC...,, TEST OPERATNG VALUES nch-grains Pick-Up Volts Amps Full Stroke Volts Amps Min. Drop-Away Normal % of Actual PU Volts Amps Shop Field* ** *t is recommended that relays be taken out of service if the Drop-Away value falls below the value shown for field testing. **The Pick-Up voltage is not to exceed 168 volts after the relay has been energized for one hour at the normal voltage. 4574H, p. 2

3 ;- 8.. l. & "... v 4 15 l ,i:,. l11,i:,. ::: '"O. w : '91 $: -- = 10,.,,.s.. : : l.,,::.i...,!:::... j t;... " i -D:Ef,.-:- = = = l'i t;? = = =.. 1,.1 c::, == = = = ii 01 c::: t::1 = =1 =,.:... Joi: : = = = 8 Figure '4 General Assembly Drawing For PV-250 With Piece Number N Jl D D

4 .,..., PAR.TS LST FOR PV-250 POWER OFF RELAY 220V, 75 HZ. WTH PECE NO. N {Refer to Figure 2) TEM DESCRPTON WABCO Part# l A Frame Relay Rod Latch Knob Knurled Th. Nut Nut Latch Machined Pins. Stl. Rl. Elas. Stop Spring Plated Pin Roll Elastic Stp. Nt. Screw Cover Bottom Ser. #8-32 x 7/16 Fil. Stl. T.P. Gasket Ser x 1/ 4" Rd. Stl. T. Pl. Handle Standard Washer #10!nt. Tooth Ph. Bz.N.Pl Ser. #10-32 x 3/8" Pan. Hd. Calibration Tag Adhesive Film Wire Seal 2 Ply 12 4LD SL CTD Seal Lead Name Plate Ser. #4-40 x 3/16" Rd. Stl. (F)TP Brkt. Support Ser. #10-32 x 1/2" FL Stl T.P. Field Control Field Local Vane Assembly Screw Trunnion Bushing Bushing nsulation Roller Brk. Upper Roller Brk. Lower Roller Plate Clip Lock Bracket Rivet #11 x 5/16 Rd. Hd. Ph. Bz. Pin Washer Tension T.P. Pin Pin Pin Block Terminal Ser. #8-32 x 7/16 Rd. Hd. St Pin ndexing Parts Bag M M J M M J M J M M J J J M J J J A J M J M J N N N N M M M M Ml61753 M Ml09074 J M J M M M M J J N H,. p. 4

5 l. WAlilCl:J PARTS LST cont'd. TE-1 DESCRPTON WABCO Part# Block Contact See Note "A" Block Contact See Note "A" Ser. #8-32 x 7/8" Rd Hd Stl T.P. Arm Operating Counterwt. Counterwt. Locknut Top Cover Ser. #6-32 x 1/4" Fil. Hd. Washer Arc Spr Stl Term Pre nsul Dia. G N N J N M M N J J J Note "A" When reordering contact blocks be sure to include the "-0001" suffix with the part number. This assures proper processing of the contacts for optimum performance in these relays. 4574H, p. 5

6 , WABCO PARTS LST FOR VANE N USED ON RELAYS PV-250 WTH PC. NO. N (Refer to Figure 3 Below) TE1. DESCR,PTON WABCO Part #... s.,..,.,.,. n 1 Vane Crank N Vane M Clips Buffer Ml Rivets #14 x 5/16 Rd. Ph. Bz. J Washer M Rivets #11 x 5/16" Rd. Ph. Bz. J Crank L. H. Oper. Arm M Crank R.H. Oper. Arm M Rivets #14 x 13/16 Rd. Ph. Bz. J Figure 3 VANE ASSEMBLY PC.NO. N H, p. 6

7 ., +b t Oft:;-- -r = c::i chd:d:i = l C! 01 =.!, l l 10 w lo q" "'' 3:1 3: 3:1 3:1 o o cc o:: rc 1i 1 N. i' o.l o.' a: a:: CONTACT BLOCK N N CONTACT SECTON ROW A B - c c c E E - D D D. i.' =,_r L-2 SEC11 ON e:l- 3,2 SECTON 1'E" SECTlON- 1 'A 11 5.:s:.. V..;.J.. 'P. -..J SECT ON-"c'' Figure 4. _ Contact Block Diagram D D

8 WAS CC PARTS LST FOR CONTACT BLOCK WTH THE FOLLOWNG PC. NO'S. N REF "A" N REF "B" USED ON RELAY PV-250 N (Refer to Figure 4) TEM REF DESCRPTON PC. NO B A-B B A A-B.. Spring Contact Spring Contact Spring.Contact Finger CQntact Spring N N N M N H,. p. 8

9 ;.,,... li -.». = ::; ;; ;,: i",-.0,; - co r-"' L.. ll 11 n T l T a l bt} a [ l o n n a fl n [ T l l [.a a [J [ T 1 a T fj n T n J a J. (;'. - C? \1L,r. Lt) M CD 0 0) - [] [] [] [] [][D t i 1:]{ l 6) 0.J! ][JJ [»[]. wi... J "' :0 [JJ [ [)CJ}{] D[Jtr [OCDf :q[l, - D)fl. i. "' l f[j 0){0:f..,.)). '1\,., &: i. ) ' (. J L. J [J [ '>_; ' ' '..,,... ' " (!) H, p. 9

10 WA\BCa ;... TEM PARTS LST FOR MOUNTNG BASE N USED ON RELAY PV WTH PECE NO. N DESCRPTON (Refer to igure 5) Mounting Base Complete SEE NOTE, "B" Mounting Base Only Tag Cont. Recpt. Solderless #10 to #12 Wire Cont. Recpt. Solderless #14 to #16 Wire Cont. Recpt. Solderless #18 to #20 Wire Meter Test Plug nsulated Test Plug (for opening any coil or contact circuit and for removing receptacle springs) PECE NO. N N J J J J M22965 J NOTE "B" When mounting base complete is ordered a bag of parts 4-1/8" x 5-1/2" is included inner carton with the mounting base and instruction prints. muslin in the Bag Contains: (2) Tags (4) #4-40 x 3/16" Rd. Hd. Screws (4) 1/4" steel plate washers *(4) 1/4" -20 x 1-1/4" Rd. Hd. Stl. Screws *(4) Washers *(4) 1/4" steel lockwashers *(4) 1/4" -20 Steel Hex Nuts and (Req'd Quantity) Contact receptacles (solderless J for #14 to #16 wire. f other wire size is used request the proper part number as shown in tem 4 when ordering base complete. (i.e., N except using contact receptacles,.solderless J680181). Asterisk (*) tems are for attaching mounting base to the rack. 4574H, p. 10

11 v. (,, MANTENANCE NOTCE PV-250 AC VANE RELAY nspection 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. RELAY MANUAL N SM-4574A N N SM N N SM-4574C N N SM N SM-4574E N N SM-4574F N N SM-4574G N SM-4574H N SM-4574J N SM-4574L N SM-4574M N N SM-4574N How to find the date of manufacture? Look at the serial number of the relay. n 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. October, CORPORA TE DRVE PTSBURGH, PA 152J7 COPYRGHT 1988, UNON SWTCH & SGNAL NC PRNTED N USA

12 WARNNG THE FOLLOWNG PROCEDURE NVOLVES THE OPENNG OF A VTAL RELAY. THS PROCEDURE MUST BE PERFORMED BY NDVDUALS QUALFED TO WORK ON VTAL RELAYS. F THE FOLLOWNG NSPECTON S TO BE DONE N THE FELD, BE CERTAN TO OBSERVE ALL RULES REGARDNG THE SAFE MOVEMENT OF TRANS BEFORE REMOVNG THE RELAY FROM SERVCE. nstructions 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. f 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. f 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 TWO THREADS EXPOSED (MN.) APPLY GLYPTAL,.=..., MAKE SURE SPLT COUNTERWEGHTS WTHOUT LOCKNUT COUNTERWEGHTS TGHT AGANST EACH OTHER STUD S SPREAD SLGHTLY APART MAKE SURE TRUNNON LOCKNUT S TGHT MAKE SURE TRUNNON LOCKNUT S TGHT TWO THREADS EXPOSED (MN.) APPLY GL YPTAL 0 BOTTOM VEW (COVER REMOVED) DO NOT DSTURB CONTACTS DURNG SERVCNG COUNTERWEGHTS WTH LOCKNUT