DIESEL LOCO

Latest News

General Manager’s Safety Award for 10 Staff of Central Railway

View All >>

1 Rail News

क्षेत्रीय हिंदी प्रतियोगिता 2023 संपन्न

Central Railway Revolutionizes LHB Power Car Testing with Static Water Load Testing Units in a First of its kind Innovation
Shri Ram Karan Yadav takes over as General Manager, Central Railway
भारतीय रेल ने नवंबर 2023 तक 1015.6 एमटी माल लदान का लक्ष्य हासिल किया
जबलपुर-हजरत निजामुद्दीन एक्सप्रेस सहित 10 ट्रेन निरस्त, कामायनी एक्सप्रेस परिवर्तित मार्ग से चलेगी
रेलवे की बड़ी सौगात! अब इन स्‍टेशनों से पटना के लिए मिलेगी सीधी ट्रेन, जानें शेड्यूल
किसानों के बाद अब पूर्व सैनिकों ने घेरा रेलवे ट्रैक, One Rank One Pension की मांग को लेकर शुरू किया प्रदर्शन
रेलवे स्टेशन के फुट ओवरब्रिज पर ले सकेंगे स्ट्रीट फूड का आनंद

view all>>

2 Railway Employee

General Manager’s Safety Award for 10 Staff of Central Railway

view all>>

3 Always Important

जानिए पटरियों के साइड में क्यों लिखे होते हैं नंबर?

view all>>

DIESEL LOCO – Dynamic Braking

January 5, 2021, 11:22 PM

DIESEL LOCO – Dynamic Braking

It is an electrical brake, used only when loco is in motion. During dynamic braking, traction motor works as generator, hence retardation torque is developed on axle which opposes the movement of wheel and speed of loco is reduced.

Advantages of dynamic braking

1. No wear and tear in brake block and wheels.
2. Speed of train can be maintained constant on down gradient.
3. Train can be controlled easily with out jerk.
4. Fuel saving.
5. To Maintain train punctuality.

Procedure of Applying Dynamic Brake –

1. Bring MH to idle position gradually.
2. Apply train brake by A9.
3. Bring MH on IDLE’ position and then SH kept on “Braking” position. After this MH kept on “o” and then braking position and wait for some time, then move the master handle slowly towards the‘MAX’ positions of braking.
4. Keep watch on load meter.
5. To release the dynamic brake, bring the MH slowly to “Braking” position and then “o” position.
6. After waiting for some time, MH handle kept on “Idle” Position and then SH kept on “Motoring” position.

Precautions to be taken During Dynamic Braking –

1. Operate the master handle smoothly.
2. Do not apply independent loco brakes during Dynamic Brake.
3. Do not apply emergency train brakes.
4. Do not apply dynamic brakes when BKBL is not working
5. During dynamic braking if GR operates, don’t apply dynamic brakes.
6. If GFC is wedge do not use dynamic brake.
7. If the locomotive speed exceeds more than 90 km/h, braking current should not exceed 600 amps. 8. If the speed of the locomotive is less than 90 km/h then – Maximum braking current is limit up to 800 amps.

Changes take place during Dynamic Braking –

1. BKT position will change to braking.
2. BKR1, 2, 3 energized.
3. The loco brakes applied in conjunction braking will be released due to D1 pilot valve energized.
4. GFC will picks up.
5. Engine RPM increases to 4th notches RPM.
6. Reverser coil energize.
7. All power contactors will pick up except P2, P22, S21 and S31 due to which following changes takes place.

a) All TM field coil will be connected in series across the Traction Alternator and get excitation current.
b) All TM armatures will be in group of two and connected across the braking grids.
c) All TM will work as separately excited generator and generated current goes to braking grids and BKBL. BKBL cools the braking grids.
d) Retardation torque produced in TM which opposed the wheel movement.

Railway Employee (App)

Rail News Center ( App)

Railway Question Bank ( App)

Railway Mutual Transfer

(App)

Information Center ( App)

Disclaimer: The Information /News /Video provided in this Platform has been collected from different sources. We Believe that “Knowledge Is Power” and our aim is to create general awareness among people and make them powerful through easily accessible Information. NOTE: We do not take any responsibility of authenticity of Information/News/Videos.

This entry was posted in Diesel Loco