nUNION" SERVICE SPEClfICATION NUMBER 1862

UNION SWITCH & SIGNAL .. . . . SWISSVALE, PA. DIVISION OF WESTINGHOUSE AIR BRAKE COMPANY

DN-10 TRAIN CONTROL RELAYS

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Supplementary Specification: 1862-A Special Slow Drop-Away Relays

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1. GENERAL DESCRIPTION OF RELAYS:

This specification applies to all DN-10 relays used in the engine equipment on train control apparatus. These relays are provided with springs to hold the armature down so that vibration will not open the back contacts when the relay is deenergized.

Two types of hold-down springs are used: coil springs which are located back of or at the ends of the armature; and flat springs which are fastened di­rectly to the armature and extend toward the front of the relay.

These relays are furnished as ordinary acting, slow acting, and half slow acting. Slow drop-away relays are marked "Slow-Acting" on the coil tag3, Half slow drop-away relays have one coil marked "Slow-Acting". Ordinary acting relays have no special marking on the coil tag.

The DN-10 Train control relays are built with short or long cores being Ums identified in the tables at the end of this specification.

2. BACK STRAP, COILS AND CORES:

The back strap and tops of cores should be clean and make good magnetic contact. If necessary, the tops of the cores may be dressed with a fine flat file carefully held down against both cores. The ground surface of the back strap may be cleaned with fine sand paper.

The top of each coil should be approximately 1/16 inch below the top of the core, this space being required for the spring coil lock. Cork washers may be used under the coils to raise them if they are too short.

Ordinarily in repairing the relays, it will not be necessary to change out the cores as these are made of non-aging magnetic material.

There may be occasions where, due to accidental breakage, it becomes necessary to replace the cores. In those cases we recommend that complete core assemblies be ordered in pairs so that pole faces can be properly ground to size and to a true plane at our shops, thereby facilitating repairs in the field.

In case of breakage of a top plate, care should be taken when assembling cores to a new top plate to use the old cores in pairs as removed from the broken top plate.

April 20, 1954

U.S.& S. - 2 - Service Spec. 1862 Date: 4-20-54

If the armature bracket is disassembled from the pole pieces, the old dowel pins should be removed and new dowel pins used with holes drilled in a new location.

It is recommended that cores which have been used twice, and therefore have two dowel pin holes, be made suitable for re-use by drilling and reaming the dowel pin holes to 0. 186" max., 0.185" min. (#13 drill size) by 5/16" deep, and then installing brass plugs UM241126-Dwg. 8097 Sh. 951 by pressing in and filing flush. When using old armature brackets with cores having plugged holes, the old dowel pin holes in the bracket may be re-used by using oversize dowel pins UM241131-Dwg. 8097 Sh. 940.

If the protective coating on the pole faces has been damaged in any way, it should be removed and the pole faces treated with "Union Pole face Treatment" in accordance with Instruction Pamphlet U-5038.

3. ARMATURE AND PIVOT SCREWS:

Proper physical air gaps for the various relays are listed in the calibration tables.

Physical air gap is the air gap measured between the pole faces and armature with rust protective coatings on these parts.

The armatures of relays which require a 0. 013 inch air gap should be set to a parallel physical air gap of not less than 0. 013 inch. The armatures of relays which require an 0. 011 inch air gap should be set to a parallel physical air gap of not less than 0. 012 inch, then, if necessary in order to obtain proper cali­bration values, the length of the center armature stop pin may be reduced to pro­vide for a minimum air gap of 0. 011 inch at the front edge of the armature.

The other two stop pins in the armature are safety stop pins, and should not touch the pole pieces unless the air gap is reduced by approximately O. 003 inch.

It is recommended that the stop pin located in the top plate assembly not be filed when making air gap adjustments.

Relay pivots should be inspected and replaced when worn. When making re­placements, it should be noted that the armature has from 0. 010 inch to 0. 020 .inch end play after the pivot screws are tightened, and that it does not bind against the pivots.

The nominal diameter of the pivot screw is O. 0635 inch and on new relays the clearance between the pivot and the bearing should not be less than 0. 002 inch nor more than 0. 004 inch. If any wear is noted, the phosphor bronze pivot screws should be replaced with stainless steel pivot screws UM164165-Dwg. 8378 Sh. 356 and lock washer UM159815-8486 Sh. 395.

The diameter of the pivot screw may be measured with a micrometer. The clearance between the pivot screw and its bearing may be checked by applying pressure on the armature, with the fingers at a point adjacent to one pivot and also over the stop pin, in the direction of the pole faces and then measuring with a thickness gauge the maximum and minimum air gap at a point as near as possi­ble to the other pivot. This measurement can be obtained by moving the free

U.S.& S. - 3 - Service Spec. 1862 Date: 4-20-54

end of the armature away from and toward the pole face, pressure being main­tained on the armature during the operation as described above.

4. OILING OF BUSHING HOLES AND PIVOTS:

For oiling armature support pivots and armature bushings, we- recommend Union Relay Oil, UN220699 - Dwg. 11876 Sh. 9.

When using this oil the cap is turned carefully until free, and then when with­drawing the applicator rod, the rod shall be drawn slowly across the edge of the bottle opening to remove any excess oil. This rod shall be returned to the bottle without coming in contact with any foreign material. It shall be wiped clean each time that there is suspicion of contamination, and the bottle shall be closed promptly with its own cap.

IT IS VERY IMPORTANT THAT THE OILING SHALL BE PERFORMED AS FOLLOWS:

A. The Bushing Holes in the armature shall be carefully examined to check that they are perfectly clean and free from dust before oiling.

In withdrawing the rod from the oil it shall be draW!'l slowly against the neck of the bottle so as to remove all drops of oil adhering to it. The rod shall be moved slowly around the inside of the bushing hole so as to leave only a thin film of oil on the bearing surface.

B. The Bearing Area of the Pivot Screws shall be thoroughly covered with oil by means of the rod, the rod being withdrawn from the bottle in such a manner so as to leave a drop of oil on it. The excess oil on the pivots shall be removed by just touching it with a clean lintless cloth. Care shall be taken not to cover the shoulder of the threaded portion of screws with oil.

C. Care Shall be Taken that the oiled parts are protected from dust from the time of oiling until the relay is sealed.

This oiling is necessary only when the relay is being shopped fo.r other pur­poses.

5. CONTACT ADJUSTMENT:

When replacing contact springs on a relay, it should be noted that the con­tact spring used bears either the mark "10" or "13" at the back end near the point where the flexible connector is soldered to the spring. This applies also to relays in service which were previously equipped with springs marked "11".

Nickel springs marked" 10" and phospher bronze springs marked" 13" have the same characteristics and are therefore entirely interchangeable. The use of nickel springs marked "11" was discontinued in order to simplify maintenance in service. This change was made possible by a slight revision of the cali­bration values.

A. General Instructions

Silver tips should be carefully prepared before contacts are adjusted, Best service is obtained from a contact surface polished as highly as possible. Care should be taken to avoid the coarse finish resulting from ordinary fine files. The

U.S.& S. - 4 - Service Spec. 1862 Date: 4-20-54

use of erasers, identified below, is recommended for the final polishing. Eraser UM101018, Dwg. 12750-1 is for use in a drill press, the end of the eraser being rotated over the silver surface. The rotating eraser should touch the silver lightly and should not be held in one place long, as this will overheat the silver contact. Eraser UM101019-Dwg. 12750 Sh. 1 is a hand eraser also used for polishing by stroking the silver in the direction of contact slide. In all cases, the silver should be against solid backing so it does not become twisted to cause beveling of the surfaces. Care should be taken to remove all eraser particles after polishing.

All screws holding the contact springs and supports, and back contacts, should be checked for tightness. All front contact springs should extend straight out in line with the surface of the support block to which they are attached.

When replacing contact springs, avoid all bending of springs except as nec­essary to secure alignment with old springs. Contact adjustment, when needed, should be made by adjusting the carbons.

B. Front- Contacts

The front contacts should be adjusted with a spacer, as specified in the tables, between the center stop pin in the armature and its stop, with the arma­ture held firmly against the spacer and stop by pressure applied between the stop pin and the pivot screws, so as to bring the armature as close to the pole pieces as the play in the pivots will permit. If it is convenient, the pressure may be applied by energizing the relay at approximately the charge value. The carbons should be adjusted so that they are in line with the silver tips and light is barely perceptible between the surfaces when the nominal spacer, as specified in the tables, is used. A spacer 0. 001 inch thinner should allow the contacts to close.

The carbons should be approximately in line when adjusted and tightened and should extend beyond the edges of the contact spring at least 1/64 inch on each side. With the relay energized the silver tips of the springs should extend be­yond the carbons.

C. Back Contacts

The back contacts should be adjusted to give at least a 0. 050 inch contact opening. This can be accomplished by using a spacer at the stop-pin as speci­fied in the tables, with the armature held firmly against the spacer by pressure applied between the stop-pin and the pivots, so as to bring the armature as close to the pole pieces as the play in the pivots will permit. This pressure can be applied by energizing the relay at approximately the charge value. The back con­tacts should be adjusted so that light is barely perceptible at the spring tips. A spacer O. 001 inch thicker should allow the contacts to close. With the arma­ture held against the stop pin there should be at least O. 050 inch opening between the tips of the back contacts and the nearest point on the contact springs. With the relay upright and the armature in the deenergized position, the back contacts should be not less than 3/32 inch from the end of the silver tip on the spring and not less than 3/32 inch from the end of the flexible part of the spring. Back con­tacts should extend atleast 1/64 inch beyond the edges of the springs on each side.

U.S.& S. - 5 - Service Spec. 1862 Date: 4-20-54

The nut and screw locks on the front and back of the front contact post should be locked after these adjustments are made.

D. Bridging Contacts

The front contact of the bridging contact assembly should be adjusted the same as the standard front contacts described under Section 5B.

The back contact spring should be adjusted so that there is 1/8" clearance between the heads of the rivets at the spring tips when the springs are not com­pressed (armature removed from relay).

The stop for the back contact spring should be adjusted to be against the spring but with no perceptible pressure.

The back contacts should be adjusted the same as standard back co:1tacts, Section 5C, except that the spacer should be 0. 010" thinner than that used for front' contact adjustment (O. 029" spacer, if 0. 039" spacer has been used for front contact adjustment). A 0. 001" thicker spacer (O. 030" spacer if 0. 029'' spacer has been used for the back contact adjustment) shall allow the back con­tact to close. This will insure at least 0. 020" compression of the front contact when the back contacts just break. This adjustment should be made by bending the back contact member, not the contact spring. The back contact tip will then be approximately 3/16" out of line from the standard back contact tips.

The bridging contact back opening with the armature against its stop must be at least 0. 040".

E. Open Transfer (Double Spring) Contacts

The front contact springs of the open transfer (double spring) contact assem­bly should be adjusted the same as the standard front contact springs in accord­ance with Section 5B.

The back contact spring should be adjusted so that there is 1/8" clearance between the heads of the rivets at the spring tips when the springs are not com­pressed (armature removed from relay).

The back contacts should be adjusted the same as standard back contacts, Section 5C, except that the stop pin spacer should be 0. 010" thicker than that used for front contact adjustment (O. 040" spacer, if 0. 030" spacer has been used for front contact adjustment). A 0.001" thicker spacer (0.041" if a 0.040" spacer has been used for the back contact adjustment) shall allow the back con­tacts to close. This will insure 0. 020" opening of the front contact when the back contact just makes. This adjustment should be made by bending the back contact member, not the contact spring.

The stop for the back contact spring should be adjusted to be against the spring but with no perceptible pressure.

The open transfer (double spring) back contact opening with the armature against its stop must be at least 0. 050" and the front contact opening with the armature fully released must also be at least 0. 050".

6. CALIBRATION:

After the relays have received the foregoing inspection and adjustment, they shall be calibrated as outlined in the following to meet the requirements

U.S.& S. - 6 - Service Spec. 1862 Date: 4-20-54

in the tables at the end of this specification. Lists are furnished at the end of this specification which ref er to the line in the calibration table that should be used for a given relay reference. Any changes of contact adjustment necessary in order to meet calibration requirements should be made by moving carbons or back contacts, not by bending contact springs.

A. Armature Hold-Down Spring Adjustment:

a. Adjustment of Coil-Springs

The coil springs should be adjusted while calibrating the relay, putting as much tension in the springs as possible, still leaving the relay within the cali­bration requirements. This adjustment is made by raising or lowering the movable support for one end of the spring. The two springs should be adjusted to approximately the same tension by noting that the supports are raised the same distance from the end of the support post.

It shou.lp be noted also while making this adjustment and locking the coil spring supports, that the studs in the back corners of the relay top plate are securely tightened so that they will not turn.

b. Adjustment of Flat-Springs

The flat hold-down springs should be checked to see that they are in line with each other and also that they extend straight out from the armature surface on which they are clamped.

After the contact adjustments have been completed, the pressure on the flat hold-down springs should be adjusted by means of the two hex screws at the front of the relay until the relay picks up at a value between the maximum and minimum specified in the table. The springs should not be bent to adjust their pressures.

Both hold-down springs shall be given the same adjustment. It will be satis­factory to check this adjustment by sighting across the springs to see that they are approximately in the same plane after adjustment.

B. Drop-Away With Contact Pressure:

The relay should be given a charge as specified in the tables and the current should be gradually reduced until the armature drops away. This will be the drop­away value of the relay and should not be less than the value specified.

C. Pick-Up:

After obtaining the drop-away value, the circuit should be opened for one second and current again applied in the same direction and increased gradually until the armature picks up. This value should be between the minimum and maximum values specified in the tables.

D. Working:

After obtaining the pick-up value, the current should be gradually increased until the armature is against the stop pin. This value should not be greater than specified in the tables. On some relays the armature will go to the stop pin directly at the pick-up value. When this is true the tables show the same value for ma...ximum pick-up and working.

u. s. & s.

E. Slow Acting Relays:

- 7 - Service Spec. 1862 Date: 4-20-54

Drop-away, pick-up and worn:ing values should be taken the same as on or­dinary acting relays except that it is necessary on slow acting relays to make changes in current very slowly or the results will be inaccurate.

F. Time Values:

In addition to the above calibration values it is also necessary to obtain the time of drop-away, time of pick-up, and the open circuit times on pick-up and drop-away of slow acting relays as specified in the tables.

Time of drop-away is the time measured from opening of the relay circuit to opening of the front contacts.

Time of pick-up is the time measured from closing of the relay circuit to the closing of the front contacts.

Open circuit time on drop-away is the time between opening of the front con­tacts and closing of the back contacts on deenergizing the relay.

Open circuit time on pick up is the time between opening of the back contacts · and closing of the front contacts on energizing the relay.

The circuit for measuring the time values is shown in Fig. 1. The cycle counter may be a Westinghouse Cycle Counter, a General Electric Synchronous Timer or a Standard Electric Time Co. Timer Model AC-1. Snap switch "C" may be made by removing the jumper from an ordinary "3-way" snap switch, and making four connections as shown. It should be noted that a snap switch is necessary at C, since there should be no time lost between opening of the re­lay circuit and starting the cycle counter. With this circuit any convenient battery up to 40 volts may be used.

When testing relays of 50 ohms or less, switch" A" should be closed. When testing relays of more than 50 ohms, switch "A" should be open.

When measuring pick-up time or open circuit time on pick-up for relays of more than 50 ohms, the slider should be placed at the upper end of the #2 poten­tiometer and adjustments made with the #1 potentiometer.

After setting the relay energization to the proper value for each time re­quired, the time values may be obtained as follows:

To measure drop-away time close switch "B", open switch "E" and, after waiting a sufficient time for the relay to saturate, operate snap switch "C" to deenergize the relay.

To measure open circuit time on drop-away connect jumper "D", open switch "B", close switch "E" and, after waiting a sufficient time for the relay to saturate, operate snap switch "C" to deenergize the relay.

To measure open circuit time on pick-up connect jumper "D", close switches "B" and "E" and operate snap switch "C" to energize the relay.

A. Special Note:

It should be noted that coils of certain references of relays, marked with an asterisk(*) in the lists at the end of this specification, are connected so that ener-

U.S.& S.

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90 OHM POTENTIOMETERS'-----' UJ6 2013-89954-SH,7

AMMETER

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RELAY ON TEST~~ ...

JUMPER-------•---' "o''

RES. ESC"P·T.

MOTOR

Service Spec.1862 Date: 4-20-54

5 OHM.RESISTOR UN 12 5328-90 6 5-SH.62

CLOSED ONLY WHEN MEASUR­ING TIMING VALUES ON RELAYS HAVING TOTAL RE -SISTANCE OF 50 OHMS OR LESS.

MODIFIED SNAP SWITCH

LOCK SW. OFF

4 3

e 115 V 230 V +

• 115 V 230 V R + 2

STANDARD ELECTRIC TIME CO. TIMER MODEL AC - 1

(ALTERNATE)

L__....!.._!,.._ _ _J-..-'---j--WESTINGHOUSE CYCLE

To Measure

Drop-Away Time Pick-up Time Open Circuit Time on Drop-Away Open Circuit Time on Pick-Up

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110 v. A.C.

Switch ''B''

Closed Closed Open

Closed

COUNTER OR GENERAL ELEC. SYNCHRONOUS TIMER.

Switch Jumper "E" ''D''

Open Without Closed Without Closed With Closed With

Fig. 1 .... Circuit for Measuring Time Values

U.S.& S. - 9 - Service Spec. 1862 Date: 4-20-54

gy applied to both coils in series will not operate the relay. When calibrating these relays, one coil only should be energized.

It should be noted that some of the relays have a short circuiting connection on one of the coils. This connection is made to increase the time of drop-away as noted in the table for these relays.

9. ARMATURE BACKSTOP ADJUSTMENT

With the relay in the normal upright position and deenergized, the armature back stop adjustment should be made as follows:

A. Relays Having Hold Down Coil-Springs Located Back of the Armature.

Relays having the hold down coil-spring located back of the armature tend to have an excessive amount of back contact slide, and this should be controlled by adjusting the armature stop screw to touch the armature, with a spacer under the -main stop pin O. 030" thicker than that used for back contact adjustment. After this adjustment is made it should be noted that, with the relay inverted, the armature will still rest against the back stop.

B. Relays Having Hold Down Coil-Springs Located at the Ends of the Arma­ture.

Relays having the hold down coil-springs located at the ends of the armature do not have excessive back contact slide and, after the contact and coil-spring adjustments have been completed, the back stop should be adjusted so that light is barely perceptible between the back stop and the armature.

C. Relays Having Flat Hold Down Springs on the Armature

After the flat-spring adjustments have been made, the mechanical back stop should be adjusted so that light is barely perceptible between the tips of the two legs and the flat hold down springs on the armature. The final check and adjust­ment of the back stops may be done by springing or slightly bending the legs of the stop individually as may be required. Both legs should be adjusted to show the same gap, and the tips should be parallel to the mechanical springs.

10. FINAL CLEANING OF CONTACTS

Final cleaning of contacts should be done after all adjustments have been made and the relay meets the required calibration values. The following clean­ing procedure is recommended:

a. All contacts should be cleaned using a clean, lintless, cloth-covered metal strip moistened with denatured ethyl alcohol to wipe the engaging surfaces of the silver and silver impregnated carbon contacts. The alcohol should be ap­plied to the cleaning strip from a closed container such as a small oil can in order to prevent contamination of the alcohol.

b. Dry the contacts immediately using a clean, lintless, cloth-covered metal strip.

c. The contact resistances should then be checked, before and after the re­lay bases are applied, to values lower than service specification limits. It is

U.S.& S. - 10 - Service Spec.1862 Date: 4-20-54

desirable to obtain as low a value as possible consistent with the characteristics of the type of contact being cleaned.

d. Silver impregnated carbon contacts which will not meet the required values may be sanded with #4/0 metallographic emery paper and again cleaned and dried per items a. and b. Occasionally it is necessary to sand and re-clean the carbon a second time before the lower limits are met.

11. CONTACT RESISTANCE

Resistance of front contacts should be measured with the relay energized and the armature against the stop pin and resistance of back contacts with the arma­ture in the deenergized position. Cleaned contact resistances must not exceed the values given in the following table:

Front Contacts

Silver to carbon (Non-impregnated) 0. 18 ohm * Silvei;- .to silver-impregnated carbon 0.09 ohm

Back Contacts

Silver to silver 0.03 ohm Silver to silver-impregnated carbon 0.18 ohm

12. SELECTION OF CALIBRATION VALUES:

The fallowing tabulation lists all relays by piece number and gives reference to proper line in the calibration table for a given relay.

WRITTEN BY:g. (/. ~ ~d/.r41APPROVED BY: ~~ u ; CHECKED BY:'fi..c!ll/1d?l'"L+-u-s+ DATE: &:-2. tJ- S--4-

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U.S.& S. - 11 - Service Spec.1862 Date: 4-20-54

LIST OF RELAY PIECE NUMBERS WITH REFERENCE TO PROPER TABLE AND LINE FOR CALIBRATION

Piece Table Line Piece Table Line Piece Table Line Number Number Number

*UN139148A 1 E UN143796B 3 c UNl 77278A 1 H UN139148B 3 B *UN143797A 1 F UN177278B 1 F

*UN140799A 1 E UN143797B 3 c UN189972A 1 J UN140799B 3 B UN144214A 3 c UN190128A 1 J

*UN140800A 1 F UN144214B 3 c UN190128B 1 J UN140800B 3 A *UN144215A 1 G UN199806 2 E UN141091 1 K *UN144215B 1 G UN199807 2 E UN141112A 1 B *UN146538 1 F UN199808A 2 B UN141112B 3 B *UN147677 1 F UN199808B 2 I c

*WH41113A 1 c *UN149365 1 F UN206148 3 D UN141113B 3 A UN151211A 1 E UN210800A 2 F

*UN141114A 1 F UN151211B 4 A UN210800B 2 F UN141114B 3 c UN151212A 1 E UN218740 2 F

*UN141115A 1 F UN151212B 4 A UN218741 4 D UN141115B 3 c UN151213A 4 B UN218742 4 D

*UN142626A 1 F UN151213B 4 A UN218743 4 D UN142626B 3 c UN159843A 4 E UN228268 1 F

*UN142996A 1 E UN159843B 4 E UN229815A 1 E UN142996B 3 c UN165446A 4 B UN229815B 3 c

*UN142997A 1 E UN165446B 4 E UN229816A 1 ~

UN142997B 3 c UN169783A 1 F UN229816B 3 c *UN142998A 1 E UNl 72720A 4 E UN238426 1 F

UN142998B 3 c UN172720B 4 E UN255724 1 J *UN142999A 1 F UN172848B 4 E UN283063A 2 G UN142999B 3 c UNl 73130A 4 E UN283063B 2 G UN143230A 1 B UNl 73426 2 A UN299475A 4 E UN143230B 3 c UNl 74738A 4 B UN299475B 4 E

*UN143231A 1 c UN174738B 4 E UN299476A 2 H UN143231B 3 c UNl 75687 1 F UN299476B 4 E UN143796A 1 E UNl 76086 1 H

*The coils on this relay are connected so that energy applied to both coils in series will not operate the relay.

TABLE 111 Calil.Jralion of DN-lO Train Control Relays

Coil Spring Hold Down. Shurl Core:-;. Minimum Physical Air Gap 0. 013 Inch. ·----·-···---

Line as De:-;cr iptwn and Coils Stnp Pin Charge Max. P. U. Min. Min. Retardation Given in ConnectiDns for Ohms Spacer for & Working Min. Drop-Away

·-···-P.U. Drop-Away Max. Pick-Up

Pc. No. Calibratiou Per Cont. Adj. List Pair Front Back

In. In. Amps. Amps. Amps. Amps. Volts Sec. Volts Sec.

3F-2B L. V. B Contacts. One 150 .039 .064 .176 .097 . 080 .030 12 .6 12 . 37

Coil Open

3F-2B L. V. c Contacts. One 150 .039 . 064 . 176 .097 .080 .030 12 .75

Coil Shorted

3F-2B L. V. E: Contacts. One 900 . 039 .064 .070 .041 .030 . 011 32 .G

Coil Open

3F-2B L. V. F Contact::;. One 900 . 030 .064 .070 .032 . 020 .009 32 1. 0

Coil Shorted

3F-3B L. V. G Contacts. One 900 .039 .064 .070 .061 .045 . 011 32 .6

Coil Open

4F-4B or 4F-H 2B L. V. Cants. 900 .039 .064 .078 . 043 .032 .0144

One Coil Shorted

4F-4B or 4F-J 2B L. V. Conts. 900 . 039 .064 .039 .025 . 016 .007

Coils in Series

4F-4B or 4F-K 28 L. V. Conts. 250 . 039 .064 .108 .060 .044 . 020

One Coil Shorted

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TABLE 112 Calibration of DN-10 Train Control Relays

Coil Spring Hold Down. Long Cores. Minimum Physical Air Gap 0. 013 Inch. --·-

Line as Description and Coils Stop Pin Charge Max. P. U. Min. Min. Retardation Given in Connections for Ohms Spacer for & Working P.U. Drop-Away Min. Drop-Away Max. Pick-Up Pc.No. Calibration Per Cont. Adj. List Pair Front Back

In. In. Amps. Amps. Amps. Amps. Amps. Sec. Amps. Sec.

4F-4B L. V. A Contacts. Coils 26 .030 . 055 .100 .045 . 040 . 018 .060 1. 1 . 060 1. 5

In Series

4F-4B L. V. B Contacts. Coils 32 .030 .055 .056 . 025 . 022 . 010

In Series

4F-4B L. V. c Contacts. One 900 . 030 . 055 .034 .015 . 0125 . 006 .070 2.0

Coil Open. -4F-4B L. V.

D Contacts. One 450 . 030 . 055 . 034 .018 . 0145 . 006 .070 2.25 Coil Only

4F-4B L. V. E Contacts. Coils 32 . 030 . 055 .080 .036 . 032 .0165 . 048 0.85 . 048 1. 5

In Series

4F-4B L. V. F Contacts. Coils 900 . 030 .055 . 017 .008 . 006 .003 .035 2.0

In Series

4F-4BL.V. G Contacts. Coils 2000 . 030 . 055 . 0126 .0059 .0045 .0022 .026 2.0

In Series i-----4·<

4F-4B L. V. H Contacts (1 Con- 450 . 030 . 055 . 070 . 020 . 135 .0065 .070 1. 8 .070 0.5

tinuity Cont.) Copper Ferrules on R.H. Core.

-

Max. Open Circuit On Pick-Up

Amps. Sec.

. 055 .2

. 044 ,' 2

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TABLE lf3

Line as Description and Coils Gi\·en in Connections for Ohms Pc.No. Calibration Per List Pair

2F-2B L.V. Contacts. Coils

A In Series. Min. 16 Phys. Air Gap 0. 013 In.

2F-2B L. V. Contacts. Coils

B In Series. Min. 21 Phys. Air Gap 0. 011 In.

2F-2B L. V. Contacts. Coils

c In Series. Min. 26 Phys. Air Gap 0. 011 In . .., ___ 2F-2B L. V. Contacts. Coils

D In Series. Min. 24 Phys. Air Gap 0. 011 In.

-, ~·., ,,,,.., .. ·~ ,.,

Calibration of DN-10 Train Control Relays Flat Spring Hold Down. Short Cores.

Stop Pin Charge Working Max. Min. Spacer for Full P.U. P.U. Cont. Adj. Stroke Front Back

In. In. Amps. Amps. Amps. Amps.

. 020 .045 . 080 . 040 . 037 . 035

.030 .055 .100 .040 .040 . 034

. 030 · .055 .100 . 048 . 048 .036

.030 . 055 .100 .035 . 035 .032

..

Min. Drop-Away

with springs Amps.

.020

.018

.019

.014

Retardation Min. Drop-Away

Amps. Sec.

. 060 0.42

. 060 0.73

q

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TABLE 114 Calibration of DN-10 Train Control Relays F'lat Spring Hold Down. Long Cores. Minimum Physical Air Gap 0. 011 Inch.

Line as Description and Coib Stop Pin Charge Max.P.U. Min. Min. Retardation Given in Connections for Ohms Spacer for & Working P.U. Drop-Away Min. Drop-Away Max. Pick-Up Pc.No. Calibration Per Cont. Adj. List Pair Front Back

In. In. Amps. Amps. Amps. Amps. Amps. Sec. Amps. Sec.

2F-2B L. V. A Contacts. Coils 26 .030 .. 055 .100 . 045 . 035 .018 .060 1. 1 . 060 1. 75

In Series

2F-2B L. V. B Contacts. One 450 . 030 .055 .070 . 018 . 0135 . 0065 . 070 1. 8 . 070 0.5

Coil Only I

2F-2B L. V. c Contacts. One 900 .030 . 055 . 070 .018 .0135 . 0065 .070 1. 8 .070 0.5

Coil Shorted

2F-2B L. V. D Contacts. Coils 32 . 030 . 055 . 080 . 037 . 028 . 016 . 048 0.8 . 048 1. 75

In Series

2F-2B L. V. Open Transfer

E (Double Spring) 26 . 030 . 040 .100 .045 . 035 .018 . 060 1. 1 . 060 1. 75 Contacts. Coils In Series

Max.Open Circuit On Pick-Up

Amps. Sec.

.055 0.2

. 044 0.2

. 055 0. 1

Max. Open Circuit On Drop Away

Volts Sec.

28 0.15

28 o. 15

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