NATIONAL ALUMINIUM COMPANY LIMITED - Rites

• Guideline for wagon tipplers issued by RDSO – G33 (Rev. 1) of May 2010 with latest
amendments if any.
3.2.2 This Sub-section section shall be read in conjunction with Electrical Sub Sub-sections. sections.
3.3 Construction and Design
3.3.1 Construction
Control desks/panels and annunciation system shall be provided as per the requirement of
electrical Section. Annunciation’s, indications, electrical meters and instrumentation shall be
provided as specified. Ammeters shall be provided on control desk for a aall
motors rated 30
kW and above and for all equipment.
3.3.2 Design
The Contractor shall provide a comprehensive control indication and annunciation scheme
for the plant & equipment under wagon tippler and conveyor system package and integrate
the same with the existing control & monitoring scheme of the CHP. Contractor shall furnish
a block diagram and write write-up up on the scheme proposed. The final scheme will be approved by
the Owner/RITES and the Contractor shall be required to execute the approved scheme scheme. In
general, interlocking shall be achieved through feed feed-back back signals from field equipment. A
comprehensive Annunciation and Indication scheme shall be provided such that, it will be
possible for the operator to locate and identify the fault from the disp display ace of Control
desk. The scheme shall include the basic remote control instrumentation, indication and
annunciation requirements as per various technical specification requirements. However,
the Contractor may offer any alternative proposal which he co considers nsiders to be equal, superior
to the scheme as described in subsequent clauses below for achieving reliable and trouble
free operation of the plant, for consideration of the Owner.
4.0 OPERATION AND CONTROL PHILOSOPHY
4.1 The Wagon Tippler control room sh shall all be located by the side of Wagon Tippler to
accommodate control & monitoring equipment of wagon tipplers. It shall also have a battery
room.
4.2 The existing coal handling system is being controlled from the following control points. The
existing control ol philosophy of the coal handling plant is being described below for the
contractor to understand the existing system and suitably plan integration of the controls
and interlocks of the proposed control system of the wagon tippler package with the existin existing
system.
4.2.1 Owner’s Existing Coal Handling Plant Control Room
Operation of the CHP equipment is being controlled from the Owner’s CHP control room.
(a.) Conveyors, feeders, flap gates, hydraulic couplings etc.
(b.) Complete Dust Suppression system & sservice
water system.
(c.) Ventilation system (group/individual control as required).
(d.) In line Magnetic separators and Suspended Magnet (ON/OFF control with indication).
Technical Specification:Sec-4,System System Parameters, Operation & Control Philosophy
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