Train Lighting Systems for Non-AC Coaches

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Questions and Answers

What is the purpose of the 12 V DC flashing to the field terminals?

To check the battery

To regain lost residual magnetism (correct)

To measure continuity in windings

To test the alternator

Which equipment should be used for checking the continuity of field and phase winding?

Multimeter or test lamp (correct)

Oscilloscope

Clamp meter

Insulation tester

What standard do the fixed type carriage fans conform to?

IS : 6680-85

IS : 6680-2000

IS : 6680-92 (correct)

IS : 6680-99

What should be done first when the rake is berthed for maintenance?

Install a caution board and rail locks Signup and view all the answers

What is the voltage of the system used in non AC BG coaches?

110 DC Signup and view all the answers

What must be ensured before removing the caution board and conducting tests?

Battery should be isolated Signup and view all the answers

Which method is suggested for testing the alternator in-situ?

With a testing machine coupled to a portable motor drive Signup and view all the answers

What must be done to the fan body and its components during maintenance?

Thoroughly clean with a cloth. Signup and view all the answers

What should be checked regarding the toggle switches?

They must be marked to indicate their specific controls. Signup and view all the answers

What action should be taken if the lighting circuit fuses are incorrect?

Check and replace with correct sizes if necessary. Signup and view all the answers

When should charging be terminated during battery maintenance?

When three successive readings are constant. Signup and view all the answers

What is the acceptable specific gravity range for cells during maintenance?

1.210 to 1.220. Signup and view all the answers

What should be done if the terminal board is found affected due to heat?

Replace the terminal board with a new one Signup and view all the answers

How can the tightness of the pulley be judged?

By the sound it makes when tapped Signup and view all the answers

What action should be taken if the pulley has slipped?

Take necessary corrective action Signup and view all the answers

What can be used to check for any abnormality in the cable from the alternator to the regulator?

A test lamp Signup and view all the answers

Which condition indicates that the generator is normal?

Residual magnetism is present in the alternator Signup and view all the answers

What is the recommended torque for tightening the bolts on the pulley?

30 kgm Signup and view all the answers

What should be checked to ensure the terminal cover is secure?

The availability of lock nuts and split pins Signup and view all the answers

What could a dull sound from tapping the pulley indicate?

The pulley is loose Signup and view all the answers

What is the first step if no generation is detected in the alternator?

Ensure there is no breakage in the cable termination Signup and view all the answers

What should be checked if rotary switches are provided instead of MCBs?

Proper fuse ratings Signup and view all the answers

What action should be taken if fan regulators are not regulating speed properly?

Check and possibly replace the resistance box Signup and view all the answers

What is the minimum insulation resistance value required for wiring tests?

2 Mega-Ohm Signup and view all the answers

What should be done to the fittings during the carriage lighting inspection?

Clean the fittings and ensure they operate freely Signup and view all the answers

What should be ensured regarding the fan blades during inspection?

They should be replaced if bent or defective Signup and view all the answers

During wiring tests, what should be done first with the main negative fuse?

Open it Signup and view all the answers

What should be performed on the glass domes of the fittings?

Clean with wet and then dry cloths Signup and view all the answers

What must be tested separately in wiring inspections?

Underframe wiring and superstructure wiring Signup and view all the answers

What should be done if rusted fittings are found during inspection?

Replace them Signup and view all the answers

What is the purpose of testing insulation resistance with all fittings and equipment connected?

To ensure safety from electrical faults Signup and view all the answers

What action should be taken if a dome cover of a tubelight is broken?

Replace the broken glass dome or acrylic cover Signup and view all the answers

Which of the following is a requirement for the fans in the coaches?

They should be available as per the layout for the coaches Signup and view all the answers

What should be done if a fan is found defective and no spare fan is available?

Affix a 'Deficiency Label' near the fan Signup and view all the answers

What is the danger of chipping insulation on cables?

It leaves a permanent scratch on the cable Signup and view all the answers

What should be checked regarding MCBs and fuses for lighting before replacing components?

Their functionality and operational status Signup and view all the answers

How should defects in fans be addressed according to maintenance protocol?

Defects should be promptly rectified when noted Signup and view all the answers

What is a correct step to take in regards to the side lamp glasses in SLRs?

Clean the glasses and red shield inside the lamp Signup and view all the answers

What is the recommended solution if any fan is missing from coaches?

Provide a switch cover and fuse if they are required Signup and view all the answers

What should be done if a berth light in first class and AC coaches is defective?

Check for free movement of shutters and replace if defective Signup and view all the answers

What type of maintenance action is discouraged regarding conductor wiring?

Chipping of insulation Signup and view all the answers

What should be done if the dome cover of a tubelight is broken?

Replace only the broken dome cover Signup and view all the answers

Which of the following actions is necessary when a fan is missing from a coach?

Label the area as deficient and report it Signup and view all the answers

What should be regularly checked regarding fluorescent light holders in coaches?

Whether they are securely mounted Signup and view all the answers

What is one of the primary functions of a brushless alternator in BG coaches?

To charge the coach batteries Signup and view all the answers

Which type of generation system is specifically mentioned for Non-AC coaches?

Self Generation (SG) Signup and view all the answers

If chipping of insulation is noted on a cable, what is the advised course of action?

Replace the entire cable immediately Signup and view all the answers

What type of alternator is described as being axle driven and designed for specific ratings?

Axle-driven alternators Signup and view all the answers

In the context of maintaining berth lights in first class and AC coaches, what should be ensured?

Free movement of the shutters Signup and view all the answers

What does MOG stand for in the context of train lighting systems?

Mid On Generation Signup and view all the answers

Which of the following is NOT mentioned as an electrical load that brushless alternators support?

Refrigeration systems Signup and view all the answers

What is the purpose of the alternator in BG coaches as per the description?

To ensure a steady power supply for lighting and appliances Signup and view all the answers

Which generation system is indicated for AC coaches in the context provided?

End On Generation (EOG) Signup and view all the answers

What is the power rating of the brush-less alternator used on Non AC BG coaches?

4.5 kW Signup and view all the answers

Which type of regulator unit is incorporated to support the alternator functionality?

Rectifier-Cum-Regulator Unit Signup and view all the answers

What is the function of the spring-loaded belt-tensioning device in the alternator setup?

To maintain belt tension Signup and view all the answers

How many deep V-grooved pulleys are utilized in the 18 kW alternator setup?

12 Signup and view all the answers

What is the specified pitch circle diameter (PCD) of the axle pulley for the brush-less alternator?

572.6 mm Signup and view all the answers

Which component is essential for rectifying the three-phase AC output of the alternator?

Full Wave Bridge Rectifier Signup and view all the answers

What type of alternator is designated for use on SG AC coaches?

Split Type Underslung Alternator Signup and view all the answers

What is the maximum output current, in amperes, for the 18 kW alternator?

138.5 A Signup and view all the answers

Which of the following purposes does the Rectifier-Cum-Regulator Unit NOT serve?

Operating the AC units Signup and view all the answers

What is the maximum wattage for the lamps provided in non-AC coaches?

40 Watts Signup and view all the answers

What is the primary function of FRP trays in the battery box?

To prevent corrosion Signup and view all the answers

What type of illumination does the 20 watt FTL lamp provide?

Bright and stable light Signup and view all the answers

What is the maximum number of trips a coach with negative earth can make before requiring corrective action?

One trip with proper marking Signup and view all the answers

What should be done if the commutator is found dirty during maintenance?

Clean with sandpaper of 0/0 size Signup and view all the answers

In case of an emergency, how can the supply from a healthy battery coach be extended?

By connecting supply to both positive and negative terminals Signup and view all the answers

What is the first step if earth is detected in the coach during maintenance?

Take corrective measures immediately Signup and view all the answers

What voltage is the power supply system for non-AC and AC coaches operating at?

110 Volts DC Signup and view all the answers

What materials are used in the framework of the battery box for AC coaches?

Mild steel and fiberglass Signup and view all the answers

If the commutator surface is pitted, what should be done?

Overhaul the commutator Signup and view all the answers

What should be monitored related to the generation condition of the coach?

Lamps and fuses condition Signup and view all the answers

Which make is approved for replacing a blown field fuse?

S&S or English Electric Signup and view all the answers

What is the design type of the battery box for AC coaches?

Closed type Signup and view all the answers

What action is required if defective fan components are identified?

Send defective fan to the shop for repair Signup and view all the answers

What should be ensured regarding the movement of brushes in the brush holder?

They must have free movement Signup and view all the answers

What is the purpose of the sealed maintenance-free (SMF) battery?

To supply emergency power without maintenance Signup and view all the answers

How long is the fluorescent tube light (FTL) used in coaches?

2 feet Signup and view all the answers

Which condition is mentioned regarding positive earth systems?

No coach shall be allowed in service Signup and view all the answers

What should be done if the generator exhibits no generation?

Check and rectify connections first Signup and view all the answers

What must be recorded during maintenance inspections?

All attention given to specific components Signup and view all the answers

Study Notes

Train Lighting and Maintenance Schedules of Non-AC Coaches

The document details train lighting systems used on Indian Railways broad gauge (BG) non-AC coaches.
Three systems are discussed: End-On Generation (EOG), Self-Generation (SG), and Mid-On Generation (MOG).
BG Coaches are categorized by their lighting generation system into EOG AC, SG, and MOG coaches.
Split type under-slung roof mounted package units (RMPU) are used in AC and non-AC coaches.
Specific alternators are used, their characteristics, and ratings according to RDSO specifications are listed. Alternators are axle-driven with 'V' belt drives and are available in different ratings depending on the type of coach.
Rectifier-Cum-Regulator Units (RRUs) are used to rectify AC output and regulate voltage and current for coaches. RRUs function to rectify the three-phase AC output from the alternator and regulate the generated voltage to the set value.
Battery types (6V/120 Ah flooded type, 2V/120 Ah VRLA, and other variations) are detailed, and their maintenance procedures are outlined. Specific gravity, and voltage of pilot cells are tested monthly. Specific gravity checking is noted for EOG coaches with 9 mono block batteries per box.
Battery charging terminals (BCTs) and rotary junction boxes (RJB's), used for external charging, and emergency arrangements are described
Emergency feed terminals (EFTs) provide additional power to adjacent coaches.
Fluorescent tube lights (FTLs) and carriage fans are also discussed, describing maintenance procedures..
A trip schedule for primary and secondary maintenance is provided, outlining steps for alternator and fan repair.
Weekly checks on batteries, alternators, and regulators are detailed.
A fortnightly schedule for battery care is described.
Monthly battery checks and maintenance procedures are listed, including replenishing and monitoring electrolyte levels.
Quarterly maintenance procedures for batteries are detailed. Insulation testing procedures are described. These include measuring insulation resistance between different parts of the alternator, regulator and earth and checking voltages at various speeds and load.
Half-yearly procedures related to insulation testing are included. Additional procedures for both super structure and underframe wiring are also included

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Description

Explore the various train lighting systems used in Indian Railways' broad gauge non-AC coaches. This quiz covers End-On Generation, Self-Generation, and Mid-On Generation systems, along with details on the associated components like alternators and battery types. Test your knowledge on the maintenance schedules and specifications essential for efficient train operations.