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to IS 4454-1981 part-1/ ASTM A228 respectively. Reason: Spring steel wire grade-2/IS 4454-1981 ... Accepted: standard testing sheet of microprocessor.

Reasoned document of Comments on draft specification of STMC Clause no. 1.0

1.1 i)

ii)

1.3

Description Forward

Comments M/s Inder Engg./BPL No comments

Accepted/Rejected with reason M/s Saitronik/HYB Regression (ingression)

Accepted: Regression Reason: Typographical Error (TGE) Accepted: Can be increased little more say “not more than 24kgs”.

Weight restrictions should be ignore, however more compact design with strength material should be used. No comments

No comments

No comments

Correction : ii) It should acquire lesser space not more than (400 mm length x 250 mm width). Height of the equipment should not be more than 170 mm max without handle. Reason: For clear communication mentioned in final draft specification

Last line

No comments

No comments

Additional: The master controller has to be cam shaft switch type only.

Vibration test

No comments

IEC 61373 (IEC 60373). Refer to annexure C of IEC61373 Handle bar should be of minimum 12 mm dia of stainless steel.

Weight of the STMC (say 20 Kg)

ii) It should acquire lesser space approximately (400 mm length x 250 mm width). Height of the equipment should be 170 mm max without handle.

Reason: It is a loco operation item and should be more rugged.

Reason: clearly mentioned in final draft specification

3.2

5.1 vii)

Handle bar should be 12 mm of stainless steel.

No comments

Accepted: IEC 61373 Reason: Typographical Error (TGE) Accepted: Handle bar should be of minimum 12 mm diameter of stainless steel. Reason: for better understanding Page 1 of 8

Clause no. ix)

5.2.1

Description The marking of label should be engraved in the top plate.

Reverser Handle (MPJ)

Comments M/s Inder Engg./BPL No comments

Recommended same CLW make key to be inserted in same vertical plane as in old conventional type master controller.

Accepted/Rejected with reason M/s Saitronik/HYB The marking should be engraved on the label and shall be riveted on the top plate.

No comments

Rejected: additional engraved marking plate which is riveted. Reason: More no. of process involved with less reliability. So it should be engraved in the top plate only. Accepted: Same CLW make key to be inserted in same vertical plane as in old conventional type master controller. Changes in para 5.2.1 have been made accordingly. Reason: 1. Railways have repeatedly raised the issue to use same MPJ key in all type of master controllers. 2. Railways suggestions (As per CELE letter no. EL/LOCO/NCR/BHEL dt 13.08.10) for using convention reverser key MPJ for operational convenience. When staff take MPJ key it should be without bothering about type of Master controller fitted in the loco. This issue had been discussed with the manufacturers several times but no any design solution came out from manufacturers. 3. This requirement also came from N. C. Railway to avoid operation difficulties as per para 6 of letter no. JHS/RS/T-68/SS dated 23.04.10.(Placed at sl no. 302) . 4. Sr. EDSE/RDSO recommended the same in Page 2 of 8

Clause no.

5.2.2

Description

Comments M/s Inder Engg./BPL

Throttle Handle (MP)

1. “U” path for operation form traction to braking side. 2. Position of MP handle shifted to extreme right side from middle.

Accepted/Rejected with reason M/s Saitronik/HYB

No comments

his tour note (para 1.1.1) dated 18th & 19th Mar‟2010.(Placed at sl no. 301) 5. As per observation of CR letter no. BSL/TRS/SSE/SE/PPIO/3 dated24.01.09 (para 6) ZSMGR panel cock also has common slot as reverser key. (Placed at sl no. 266) Accepted: 1. “U” path for operation from traction to braking side. 2. Position of MP handle shifted to extreme right side from middle. Changes in para 5.2.2 have been made accordingly. Reason: 1. a) Similar „U‟ path MP handle is used in EMD & ALCO diesel loco. (Placed at sl no. 352) b) The movement of the MP handle should be visible clearly during the shifting from traction to braking side or vice-versa. C) Due to simple & more reliable mechanism, this mechanism is used worldwide. Pull to operate mechanism was complicated and unreliable as it need more components like spring and pulling arrangements to release MP handle to braking side. d) Operational staff of CR observed that there is a chance of stuck up the existing pulling type of locking lever from TR to BR or during abnormal condition if quickly transfer to „0‟ position. (Placed at sl no. 286) Page 3 of 8

Clause no.

Description

Comments M/s Inder Engg./BPL

Accepted/Rejected with reason M/s Saitronik/HYB 2.

a) The regular operation of MP handle is done by drivers. It would be more convenient to operate If MP handle is on the extreme right side. Previously rubbing of hand with MPS handle used to occur. Now this problem is also solved by shifting MP at the extreme right position. b) Comments given by Sr DEE/TRS/JHS for STMC in feed back of crew friendly cab that “it is also felt that the position of the control lever is also a cause of uncomfort. It will be more comfortable to keep the main control lever (MP handle) middle one which is maximum use in front of the right hand of the loco pilot as provided in three phase locomotives. At present this lever is in front of his nose which is uncomfortable to pushing and pulling back. Hence both the positioning of lever as well as force required to operate it need improvement”. As per para 6 of letter no. JHS/RS/T-68/SS dated 23.04.10 (Place at sl no. 302) C As per MOM dated 11.05.10 point no. 3 (Vii) shifting of main MP handle by 2” on the right side for both the manufacturer were instructed . (Placed at sl no. 307)

5.2.3

Field weakening handle (MPS)

Position of MPS handle shifted to

No comments

d) As per feedback of ELS/JHS/NCR staff & loco pilot through email dated 11.05.10 that gap between MP and MPS handle to be increased. (Placed at sl no. 308) Accepted: Position of MPS handle shifted to middle from Page 4 of 8

Clause no.

Description

Comments M/s Inder Engg./BPL middle from right side.

Accepted/Rejected with reason M/s Saitronik/HYB extreme right side. Changes in para 5.2.3 have been made accordingly as well as in annexure-1 & annexure-2.

8.0

10

10.1

Wiring, connectors & cables

1. Cam sequence of different type of loco for numbers of switches. 2. Allied make 26 pin coupler.

Features (4) vibration & shock

No comments

Material List (iv) springs

No comments

1. Amphenol/Allied or equivalent to MIL STD –C-5015. 2. Female coupler to be supplied with master controller (Female coupler to be wired with loco cables by railways. [Female coupler plug ( to be wired with loco cables)]

Reason: MPS handle is occasionally operated by the driver so it is operated from middle position comfortably. MP handle kept on extreme right. Accepted: Couplers are defined according to specification requirements. Male Coupler Socket 28-12S (to be mounted on master controller) Female coupler Plug 28-12P (to be wired with loco cables) supplied along with suitable soldered 5 meters cable and other end with feruled 3mm sq lugs. Reason: In view of standardization of the STMC unit couplers are define clearly in the spec.

As per IEC 61373, class A 3g in longitudinal, lateral , vertical

Accepted: As per IEC 61373, Cat-1 class B

Spring steel wire/musical wire confirming to IS 4454-1981 part-1/ ASTM A228 respectively.

Rejected: Spring steel wire/musical wire confirming to IS 4454-1981 part-1/ ASTM A228 respectively.

Reason: Proposed to follow latest vibration test IEC 61373

Reason: Spring steel wire grade-2/IS 4454-1981 part-1 is also in used drum type master controller in

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Clause no.

11.2

11.5.2.2

11.5.3

Description

Comments M/s Inder Engg./BPL

Type test Para one

Functional testing

Dielectric test

No comments

No comments

No comments

Accepted/Rejected with reason M/s Saitronik/HYB Spring steel wire grade2/IS 4454-1981 part-1 During the process of manufacture of the equipment, if the purchaser so desires, he may conduct /repeat any of the routine or additional tests to satisfy himself that the quality of the module being manufactured is of required standards. However the purchaser shall indicate in the tender schedule, clearly in advance, if any additional tests are to be done other than the routine tests as mentioned in this specification. Functional testing: Checking of coupler pins connection as per clause no. 8.0 of the specification along with their test sheet. Functional testing shall be done as per the pin continuity scheme given by the RDSO specification. Dielectric test 1.5kv The dielectric test shall

rolling stack application satisfactory so far. Rejected: However the purchaser shall indicate in the tender schedule, clearly in advance, if any additional tests are to be done other than the routine tests as mentioned in this specification.

Reason: It is necessary for quality of the product.

Accepted: standard testing sheet of microprocessor based and non- microprocessor based are given in Annexure-3.

Reason: For better understanding

Rejected: 1 KV Accepted: If the test has to be repeated, the voltage Page 6 of 8

Clause no.

11.5.6

12.0

Description

Comments M/s Inder Engg./BPL

Vibration & shock test

Coloring of frame assembly

No comments

No comments

Accepted/Rejected with reason M/s Saitronik/HYB be conducted as per IEC 60571 cl. No. 10.1.9.2 as per nominal working voltage of 110 V dc i.e. 1 kv ac/50Hz/1 minute. If the test is to be repeated, the voltage shall be only 85% of the previous test applied voltage value to avoid damage to the insulation of EUT. i) Functional random test as per IEC 61373 cl. No 8.1 Category 1 Class A ii) Simulated log life as per as per IEC 61373 cl. No 9.1 Category 1 Class A iii) Shock testing as per IEC 61373 cl.no 10.5 Category 1 Class A DA gray for top plate & black for under frame

shall be reduced by a factor 0.80 to avoid damage to the insulation of EUT. ( as per latest IEC 61287 cl no. 4.5.3.16.4) Reason for rejection: It should be conducted at 1.5 kV as per IEC 60077-1 table no. 8 Reason for acceptation: This method is already being used in the testing as per IEC standards. However mentioned in final draft specification. Rejected: selection of Category 1 Class A is not corrected

Reason: As per IEC cat-1 class B is shown as per annexure-B at page no. 67 of IEC 61373 (placed at sl no 367).

Rejected: DA gray for top plate & black for under frame Reason: Not matched with others cab equipments. Corrected: Top plate with gray color anodizing & bottom cover painted as per IS-5 (631) of same color of others equipment.

Page 7 of 8

Clause no. 13.1

Description Packing

Comments M/s Inder Engg./BPL No comments

Accepted/Rejected with reason M/s Saitronik/HYB …..Polly “Pack with wooden crate” to…. …..Polly Pack with wooden crate or high density thermo‐ ‐coal boxes to…

Accepted: OK Changes in para 13.1 have been made accordingly.

Reason: Required for protection during transportation.

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