BLDC Fans

Two types of fans. Can you spot the difference? These are BLDC fans. In earlier design we had sensor magnets, now we have without sensor magnets. Latter are more reliable.

Canvas Duct of LHB coach

 Canvas duct of LHB coach ducts are exposed to atmosphere. They get torn . How to overcome this problem?

Battery Charger

The non LHB AC Coach battery charger in the coaches is used for external charging of the batteries.

AC Coach Rotary Switch

RMPU Filters

Shown here are Fresh and Return Air Filters of non-LHB RMPUs.

Some questions are:

What is frequency of change?

How best to clean these Filters?

Axle Pully Pad

On the left we can see cleft in the pad which was just few weeks old. Quality of Axle pully rubber pads should be such that it should last 9 months (IOH) or even more.(POH).
Can you guess the purpose of rubber pad?

Important Equipments in Electrical Coaching

Battery box packing ( wooden ) is not very reliable, nowadays FRP/Acid proof sheets and trays are coming.

Sensors in the RMPUs are vital. They should be regularly cleaned and calibrated.

The Vane Relay Mechanism

Above we see the vane relay of RMPU

EXPENSION VALVE WITH ACTUATOR OPEN

MCB Panel of the non-AC pantry can be seen above

Problem of Alternator Locking Pin

Since beginning of 2012, we are facing problem of failure of Alternator pin and its stopper ( Locking plate).

 Worn our locking plate and the pin shown above .

 Placement in bogie shown above. Welding of the plate may be noted by MTN staff.

The new stopper ( Locking plate shown above)

Double Decker Panel Problem

ERRUs. All different inside the box.