BANGLADESH POWER DEVELOPMENT BOARD TENDER ... - BPDB

(5) Solenoid ValvesAll solenoids shall have class F insulation or higher class and solenoid enclosureshall be of weatherproof construction.Solenoid for operation on AC shall give satisfactory operation over the range of 75% to 120 % AC supply voltage.Solenoid for operation on DC shall give satisfactory operation over the range of 85% to 115 % DC supply voltage.8.11 PANEL CONSTRUCTIONAll panels except local control box shall be constructed using steel plate not lessthan 3.2 mm thick.(1) Vertical Panel of Front FaceThe panel shall be fitted with indicating instruments, annunciator lamps, operatingindicators, watt-hour meter and recorders (for generator's output, voltage andfrequency) etc. necessary for operation.(2) Slant PanelThis panel shall be fitted with control switch, indicating lamps and mimic bus, etc.,necessary for operation.(3) Vertical Panel of Rear FaceThis panel shall be fitted with protection relays, etc.(4) Panel Interior Space (230 kV switchgear control and protection panelsonly)Sliding type doors shall be furnished on the both sides of panel for access to paceshall be provided in the middle of front and rear faces of the panel to enable aman to pass through it. Chequered plate shall be furnished at the bottom of thepanel.(5) Type of Indicating Meters110 mm square with about 240 0 C of seal angle, flush mounting type with 1.5class accuracy, or other approved type by the Board.(6) Testing Power sourceAs a result power source for protective relay, meters, etc., one set of 50 Amoulded case circuit breakers of 3 phase 415 V and DC 125 V shall be provided.(7) Test BlocksTest blocks for P.T. and C.T. circuits, shall be provided on the panel as required.Ghorasal 200 MW to 300 MW Gas Turbine Peaking Power Plant Project (Vol-2 of 3)89