Page 171 - booklet draft

With the help of this test kit we can switch ON the IGBTs of power
module by providing +15v -15v square wave pulse through optical signal

generated by control card. We can check the healthiness of all sub
equipments of Power module such as Gate drive card, child card, IGBTs etc.

5.Modification of moisture drain arrangement:

Shifting of MCPA reservoir to vertical direction in CCB 2.0 locomotives.

The problem of AC-CV and MR-CV is attributed to entry of moisture.

As per the observation, the MPCA reservoir is having tapping into the panel
at the bottom most point which is causing the condensate water to enter
into panel along with air. As per general principles of pneumatics, air from

the reservoir shall be taken from top and drain arrangement at the bottom
to avoid this problem. At present, 46 locos are equipped with CCB 2.0 and

Shifting of MCPA reservoir to vertical direction is done in 23 locos.

MCPA reservoir in Horizontal After modification, MCPA reservoir
direction in Vertical direction

6.Repairing of Electronic cards