Electrical Tests - C-DOT DSS MAX-XL Installation Manual

Chapter 17.
Opening the ADP back panel, visual checking is to be done on it to see whether
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any damage has taken place during transportation.

17.3. ELECTRICAL TESTS

Before powering on the system some important tests are to be performed which are
described as follows:
Verify A.C and D.C earth resistance with which system is to be connected. Earth
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resistances are to be checked by 500V D.C Meggar. DC Earth resistance should
be less than 1 Ohm. Moreover, there should be separate A.C and D.C earth pits.
Inverters' A.C grounding should be done through separate A/C earth pit.
Ensure that inverters output ground is not connected to VDUs and printers.
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Check for any short between -48V & -48V GND at PDP copy 0 and copy 1 (with
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MCBs at DCDPs in "OFF position). Repeat this step keeping MCBs at DCDPs in
"ON" position. (-48V I/P from switching cubicles should not be fed during this
step).
Insert all the cards in their respective slots in BMs, LMs and CM as per the
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equipage list. Ensure that the cards are not jacked into the slots at this stage.
There should not be any loose fitting of fuses in PDPs and filter boxes and FBI
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cards. All filter boxes should be properly mounted.
Shorting stubs on FBI cards should be thoroughly verified from installation
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manual.
Printer cables and terminal cables are to be checked whether the cable
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connection is proper. After doing all these inspections and checkings, make the
power supply through upto DCDPs. During power on of DCDPs, it should be
ensured that all the HRC fuses are removed from all suite PDPs and IOP-PDP.
Now insert the HRC fuse at PDP for first cabinet.
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Switch off all PSU-I, PSU-II Cards in first cabinet. Check the voltage at
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switching cubicle and then at suite PDP bus bars. Voltage drop should not be
more than 1 Volt.
Now jack in PSU-I, PSU-II cards of all the frames. Jack in all the other cards
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after this. Switch on the PSU-I and PSU-II.
Repeat this exercise for all cabinets in all suites by putting HRC fuses in PDPs
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of all suites.
Switch on all PSU cards in all BMs, LMs and CM. Check whether all LEDs in
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PSU cards and on filter boxes are glowing properly. If there is any relay
chattering in any of the LCC Cards or TWT Cards, jack out and jack in of these
cards are to be done.
346 C-DOT DSS MAX-XL