【正文】 ”of the detector shall be red，the line “177。 7 1．During the electrical engineering the” consumer list／electrical power Balance Matrix” shall be drawn up．Assign motors and all other electrical load to the proper motor control center(MCC)and bus．Develop an accurate count of starter and breaker sizes for each MCC．Design the generator synchronization and regulation system along with the vendor．Confirm UPS power requirement with instrument engineer and revise UPS size．Confirm the switchgear control power requirement and，calculate battery size．Size the power cables for facilities． Develop the design for welding and single．Phase power receptacles throughout facility．Review and approve all electrical vendor data．Inspect fabrication and witness testing of electrical equipments．Catholic Protection The catholic protection system shall provide external corrosion control for the buried piping and tanks．The catholic protection consists of an impressed current catholic protection system．A feeder from the motor control center Or D0we distribution in the control building provides power to the catholic protection transformer／rectifier. The catholic protection shall be designed to maintain a rain．potential of 850 mV relative to a saturated copper—copper sulphate reference electrode．Anode ground bed for the impressed current cathode protection system shall be a vertically installed surface anode．The pipeline shall be electrically isolated at the tiein point between the in／out lets of the stations．The exact location and construction of the catholic protection rectifier site and isolating joints shall be provided in the construction drawing．The 10cation extent and method of installation of anode grounded beds and method of calculating resistance of the grounded bed to remote earth shall be provided. Details shall be provided of the physical size and electrical rafting for the catholic protection current sources，anodes and cables with circuit diagram．The transformer／rectifier(T／R)units shall be silicon diode oil immerged unit suitable for the ambient temperature and shall operate on the available alternating current power supply．The anodes shall be tubular center connected high silicon chromium cast iron alloy anodes with consumption ratio of 0．3kg／(A year)and the utilization factor of 0．8．The soil resistivity shall be obtained during the(1etail design and the isolating joints of the catholic protection shall be shop fabricated and tested． Fire Fighting EquipmentThe detection and alarm system of the flammable gas’s to be installed at the process installation area of each station plant for the gas pression stations，sub—transmission stations，pipe pigging station and branch(trunk)line stations.The fire automatic fire fighting system that consists of the fire supervision and control alarm system and the tore fighting system of gas are to be installed at the standby control center, the control rooms of the gas pression station with unattended on duty .The fire automatic alarm systems that are used for the detection and alarm of the fire are to be installed at the indication terminal of the management department of operation and the instrument rooms of the remote route block valve rooms．pigging control station，subtransmission station and gas pression station．The above mentioned station control rooms of each station．plex room and instrument rooms shall be equipped with the darnels of fire indication and plex alarm．The alarm assembly that consists of the detection and fire alarm system of the flammable gas，the detection and alarm system of flame and the automatic fire alarm system is to be installed in the panel．The alarm assembly can be used for alarming the leakage of flammable gas，flame alarming and fire alarming or fire fighting control of the whole station plant． The wiring of the fire automatic alarm system shall be in accordance with the existing state standard ‘‘Code of acceptance and construction for electric equipment engineering”．For the wiring of the fire automatic alarm system，the‘：type of wire and grade of voltage must be checked according to the existing state standard “Design code of the fire automatic alarm system．Placing the wires into the inside of pipe and wire groove shall be carried out after pletion of the grouting and earth engineering．Before placing into them the depositing water and waste material in the pipe and groove are to be removed cleanly．The circuits with different systems．different voltage de and current type are not to be placed onto the same piped groove .The wires in the pipe or groove are not to be jointed on twisted；the joints of wires are to be connected with the terminal or welded onto within a junction box．The connection point or the pipe and pipe end at the wet dust area are to be sealed．After laying out of the wires of the fire automatic alarm system，the insulation resistance of the wires for each circuit are to be measured using the meter of 500V billion ohm，the insulation resistance to the earth shall be not less than 20 MQ． The installation positions of the point type fire detector are to be in accordance with the following stipulation：a1 the horizontal distance from the detector to the wall，beam side shall not be less than 0．5m；b)no shield is with in 0．5m around the detector；c)the horizontal distance from the detector to the air discharging port of air conditioning shall be not less than 1．5m；the horizontal distance from detector to the hole port of the roof shed of air conditioning shall be not less than 0．5m；d) when the detector is installed on the roof shed of the walk corridor with a width of less than 3m，it shall be located at the center of them；e)the detectors shall be installed horizontally．When in needs to be installed tilted，the tilted angle shall be not more than 45176。Determine method of providing manual backup mode 0f operation during times of failure of automatic