SM-2666N - Ansaldo STS
Contents
1. This page 15 intentionally blank i SM 2666N 03 00 UNION SWITCH SIEHE 1 0 General Information 1 1 INTRODUCTION For other information see Service Specification 2666 This service manual covers DN 22B special biased relay P N N277655 used for a third rail indicator The instructions in Service Manual 2666 Standard DN 22 Relay apply for DN 22B special biased relays except as otherwise specified herein The DN 22B special biased relay for a third rail indicator is similar to the standard DN 22B biased relay Service Manual 2666 J but has a copper sleeve on the front core and an ordinary acting coil on the rear core The relay has insulated nuts to protect against the high voltage circuits to the relay binding posts 1 2 SHOCK INDICATORS WARNING ANY RELAY SHOWING SHOCK INDICATOR ACTIVATION SHOULD BE SHOPPED BEFORE PLACING RELAY INTO SERVICE FAILURE TO ASSURE PROPER FUNCTION OF THIS RELAY MAY RESULT IN SEVERE PERSONAL INJURY OR DEATH The shock indicator P N J680167 0012 shows red when the relay has been subjected to shock in excess of a safe level i e dropped during shipment or transport This is an indication that the relay may have mechanical damage and may not meet electrical specifications The relay should be opened and visually inspected for damage i e kinked springs Mechanical settings should be checked recalibrated and tested according to specifications by a qualified individual 1 3 R A L TEAM2. AND TECHNICAL SUPPORT The Rapid Action Information Link R A I L Team is comprised of a group of experienced product and application engineers ready to assist and resolve any technical issues concerning any US amp S product Any questions regarding the contents of this Service Manual can be answered by contacting R A I L Team toll free at 800 652 7276 or via Internet e mail railteam switch com SM 2666N 03 00 1 1 UNION SWITCH amp SIGNAL E 1 0 General Information UNION SWITCH amp SIGNAL This page is intentionally blank 4250000 00000000 SM 2686N 03 00 UNION SWITCH 8 SIGNAL 2 0 Maintenance 2 1 ARMATURE AIR GAP The armature air gap should be adjusted as closely as possible to 0 018 parallel 0 019 if the rust protective coating has been removed from the pole faces The physical air gap after painting should not be less than 0 017 If it is necessary to repaint the pole faces we recommend that Union Pole Face Treatment per Instruction Pamphlet U 5038 be used This pamphlet also covers an aluminum paint material for touching up armatures backstraps and similar parts 2 2 ASSEMBLING Assemble the permanent magnet to the relay and adjust using a spacer 0 095 thick at the main upper stop pin so that the magnet clears the armature lower stop pin by approximately 0 001 For this adjustment do not energize the relay to hold the armature against the spacer but hold it manually to bring the armature a
3. zero the circuit opened for one second and then closed Gradually increase the voltage until the armature moves away from the permanent magnet with a very definite sudden motion This value shall not be more than 90 of the actual pick up value measured The voltage shall then be increased gradually until the armature picks up and the front contacts make This value shall not be greater than that specified in Table 2 1 2 4 3 Working This value shall be obtained immediately after pick up by further increasing the voltage until the armature completes its motion and closes against the stop pin This value shall not be greater than that specified in Table 2 1 for maximum pick up and working 2 5 SERVICE TESTS It is recommended that the following calibration limits be used to determine when relays should be removed from service 22 SM 2666N 03 00 UNION SWITCH 8 SIGNAL 2 0 Maintenance 1 When the drop away of line relays falls below 67 of table value or when the drop away of track relays falls below 85 table value 2 When the drop away for full back contact pressure falls below 25 of the table value 3 When the pick up increases above 110 of the table value For field tests it is satisfactory if the armature picks up directly from the permanent magnet providing the 110 allowance is not exceeded 4 When the working is above 110 of the table value 2 6 CHECK OF PERMANENT MAGNET 2 6 1 Reverse Pick Up The armatu
4. UNION SWITCH 8 SIGNAL 645 Russell Street Batesburg SC 29006 Service Manual 2666N DN 22B Special Biased Relays for Third Rail Indicator March 2000 An ANSALDO Signal Company 2000 Union Switch amp Signal Inc Printed in U S A UNION SWITCH amp SIGNAL Revision History October 1950 March 2000 UNION SWITCH 8 SIGNAL Table of Contents Section Description Page 1 0 GENERAL 1 1 1 1 PPP 1 1 1 2 SNOCK ANO ICA OS 1 1 1 3 Team and Technical Support 1 1 2 0 MAINTENANCE ista 2 1 2 1 Armature Aif 2 1 2 2 ito Teppa st ssl bs 2 1 2 3 CODtactAGIUSITIe DD o deoa easet uem dou Mena ee 2 1 2 3 1 Front Contacts accu A ti tod ctc uu tue dicet c Lc e 2 1 2 3 2 Back tO 2 1 2 4 CAMA EEE ates St St So ot Bik oh PD 2 2 2 4 1 A ae Sn ee 2 2 2 4 2 INK 2 2 2 4 3 ids ge TT IS eee 2 2 2 5 SONICO TESIS Erre 2 2 2 6 Check of Permanent 2 3 2 6 1 Reverse PI UD oa 2 3 2 6 2 Hold Down Torque siii ds 2 3 LIST OF TABLES 2 1 Calibration Values for Special DN 22B Relay with 2F 2B L V Contacts and Small Backstrap 2 3 2 2 Contact Resistance iii Nei da eid ed a dues 2 4 SM 2666N 03 00 i S BEE Canen UNION SWITCH amp SIGNAL
5. enance UNION SWITCH 8 SIGNAL With the back contacts closed and with the armature against the permanent magnet the contact opening should be at least 0 075 With a 0 016 thick spacer between the permanent magnet and the stop pin on the underside of the armature verify that the back contacts remain closed 2 4 CALIBRATION Before calibrating the relay should be energized at the charge value given in Table 2 1 and the energization polarity should be changed several times allowing the current to build up to full value in each direction When the positive power lead is connected to the coil terminal the armature should pick up When the polarity of the power supply is reversed so that the negative power lead is connected to the coil terminal the armature must not pick up 2 4 1 Drop Away The relay shall be energized at the charge value with normal polarity and the voltage then gradually reduced until the armature drops away opening all front contacts This value shall not be less than that specified in the table for minimum drop away The voltage should be further reduced gradually until the back contacts are fully compressed with the armature against the permanent magnet shoe The energization at which this occurs shall not be less than the table s value for minimum drop away full back contact pressure 2 4 2 Pick Up Immediately after the drop away value has been measured the voltage shall be reduced to
6. re shall not pick up or move away from the permanent magnet when the relay is energized with a reverse polarity energization negative lead on the coil terminal equal to the charge value shown in Table 2 1 2 6 2 Hold Down Torque This check can only be done with the cover removed With the relay in the normal upright position and with the coils deenergized a force of 100 grams applied on the front edge of the full thickness portion of the armature shall be required to cause the armature to move away from the permanent magnet This check shall be made after energizing the relay at the charge value with normal polarity of energization TABLE 2 1 CALIBRATION VALUES FOR SPECIAL DN 22B RELAY with 2F 2B L V Contacts and Small Backstrap Air Gap 0 019 Parallel Resistance Minimum Drop Min Drop Max Pick up of Coil Charge Away Away Full Back and Working Ohms Cont Pressure Volts Amps Volts Volts Amps Volts 1000 31 8 0 0039 3 9 2 6 0 0079 7 95 Working is the same as Full Stroke SM 2666N 03 00 2 3 2 0 Maintenance 2 4 UNION SWITCH 8 SIGNAL TABLE 2 2 CONTACT RESISTANCE Contacts Front Back Silver to Silver Silver to silver impregnated carbon 0 09 Ohm 0 03 Ohm SM 2666N 03 00
7. s close to the pole pieces as the spacer and the pivot clearance will permit 1 The spacer used for adjustment may be changed between the limits of 0 085 to 0 105 if necessary to meet calibration requirements shown in Table 2 1 2 With the adjusting spacers removed and the armature released at least 50 of the armature lower stop pin should rest on the permanent magnet shoe 3 The air gap between the armature and the permanent magnet should average 0 004 but should be not less than 0 003 at any point 4 The magnet must be securely clamped and the screws properly locked with the nut lock provided 23 CONTACT ADJUSTMENT 2 3 1 Front Contacts Front contacts should be adjusted using a 0 035 normal spacer at the main stop pin A spacer 001 thinner should allow contacts to close A change in spacer is permissible if needed to meet calibration requirements however the minimum allowable contact setting is 0 030 2 3 2 Back Contacts Back contacts should be adjusted to all make together and to have least 0 050 opening when the front contacts are just making This can be accomplished by adjusting them with a spacer at the stop pin 0 035 thicker than that used for adjusting the front contacts Thus if a 0 035 spacer has been used for adjusting the front contacts a 0 070 spacer should be used for the back contacts A space of 001 thinner should allow contacts to open SM 2666N 03 00 2 1 2 0 Maint
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