Beijing Silton, BOMAY,HHCT, TIANJIN RUILING, BOMCO,HONGHUA,KERUI ELECTRICAL CONTROL HOUSE PARTS LIST
BM70D BM50D BM 40D, BM70DB, BM50DB, BM40DB ELECTRICAL CONTROL HOUSE.
Technical Description of SCR System
- SCR Drive and Control Unit
H2000 SCR equivalent with module1400. Each H2000 SCR unit will contain the following:
|A||1||Merlin-Gerin MasterPact 1600 AF/1600AAT input switch UV trip|
2NO/2NC auxiliary contacts Fixed mount
|B||1||DC Voltmeter, scaled 0-1000 VDC|
|C||1||DC Ammeter, scaled at 0-2000 ADC|
|D||1||“SCR ON” indicating lamp, (green)|
|E||1||SCR type, six (6) element, two (2) quadrant, rated at 1800 ADC continuous at 750 VDC|
The bridge will be vertically configured and cooled by a single blower. It shall be protected using semiconductor type fuses.
|F||1||DC Control Module Contain the Following:|
6 pulse thyristor firing circuits with “hard firing” outputs. The synchronizing signal originates directly form the AC line.
High speed current regulators with twenty millisecond response Automatic current limit load sharing for motors driving the same shaft and driven by separate armature supplies. No setup or adjustment required.
Individual control of current limit for all drilling functions. The operator adjustable rotary torque limit potentiometer will be mounted in the driller’s console.
Motor speed regulators for the Drawworks, mud pump and rotary table. Each regulator will be interlocked with its related assignment contactor. All controls are designed to be “foolproof”. No preset sequence of operation is required. The operator may push any button at any time and the system will either follow when it is safe or block the command if it is not consistent with the operation.
Manual voltage control for maintenance operation.
Thyristor gate suppression at approximately 150% of the bridge rating. “Zero Throttle Interlock”, the throttle on the drillers console must be
|returned to zero after an assignment change before the motor can be powered.|
Module Fault Finder includes a meter and a switch mounted on the front of the module for monitoring all critical internal voltages.
Drawworks dynamic brake control circuit.
|G||1||1 Set of DC contactors to allow for multiple assignment of the bridges|
|H||1||Surge Suppression System used to clamp any transient voltage spikes, which would be damaging to the SCR devices. Consist of a set of fused metal oxide varistors (MOVs) and will include a “Surge Suppressor ON” lamp (green).|
- Engine-generator Control Unit
H2000 SCR equivalent with module1400. Each H2000 Eng/Gen Control unit will contain the following:___________________________________________________________________________
|A||1||Power circuit breaker – 2000AF/2000AT, 600 Volt, 3 pole, 65 KAIC, UL/CSA rated (Merlin Gerin Masterpact)|
Long time/instantaneous trip unit
Manually charged, electrically closed
UV trip unit
2NO/2NC auxiliary contacts Fixed mount
|B||1||Instrumentation and controls Ammeter, scaled at 0-2000 AAC Kilowatt meter, scaled at 0-2000 kW Kilovar meter, scaled at 0-2000 kVAR Generator hour meter(imported)|
Engine control pushbutton, “Off-Idle-Run”
Generator “Run” indicating lamp (white)
Generator “On Line” Indicating lamp (red)
Circuit breaker “Push to Close” lighted pushbutton Manual engine “Speed Adjust” potentiometer Manual “Voltage Adjust” potentiometer
|C||1||Solid State Control Module include following:|
Working temperature range, -30 to +50 degrees C No load to full load regulation of +/- 1%
Response time of one (1) second typical
The load on any one (1) generator shall not differ more than +/- 10% of its rated kilowatt load from no load to full load
Reactive Power is shared between Generators by reactive power droop compensation
Real power is shared by a master / slave command line
Exciter power supply, 12 amp maximum current (the exciter current limit is set to suit the individual exciter)
Exciter power supply maximum voltage is 240 volts ( this is set by the choices of the exciter transformer and the generator self excitation requirements)
Protective functions built into the regulator are:
Reverse power trip set at -7%
Under frequency trip set at -10%
Overvoltage trip set at 15%
Overspeed trip set at +10%
Frequency/voltage scheduled for engine operation at idle speed Speed regulation from no load to full load of +/- 1 Hz steady state Response time on 0.8 seconds typical
Maximum load unbalance between engines (one hot, one cold) at all points, no load to full load, +/- 5% of its rated load
Governor electronics arranged for battery power to advance throttle for “black start” capability.
- Generator Synchronizing System
The Generator Synchronization (Sync) Circuit is required to connect additional generators to the Main AC bus, after one (1) or more generators are already connected to the Main AC Bus. The Sync Circuit compares the frequency and voltage of the Main AC Bus with that of the generator being brought on line, so that they can be matched before the new generator’s circuit breaker is closed. All of the online engine-generators’
- 600v Main Bus Ground Fault Detection System
The Ground Fault System is designed to detect AC ground faults via a set of wire connected grounding resisters. A Ground Test Pushbutton is included for determining if a Ground Fault indication is actually a burned out lamp.
|A||1||AC ground ammeter scaled at 0-100%|
|B||1||DC ground ammeter scaled at -100-0-100%|
|C||3||Ground detection light|
load will share automatically. Auto synchronizations circuit will require auto speed adjustment. The Generator Synchronizing Circuit will include the following:
|A||1||Synchroscope scaled at fast-slow|
|B||1||Voltmeter scaled at 0-750 VAC|
|C||1||Frequency Meter scaled at 55-65 Hertz|
|D||1||Sync selector switch|
|F||1||Sync check relay|
- MCC Ground Fault Detection System
One (1) set MCC Ground Fault Detection System is for 480 volt MCC system. The Ground Fault Detection System is designed to detect ground faults via a set of wire connected grounding transformer; three (3) ground detection light will indicate the ground phase.
- Hands-Off-Cranking Circuit(HOC)
The Hands-Off-Cranking (HOC) Circuit allows starting of the first engine when no other power source is available. The circuit provides power to the AC Control Module’s “engine starting and pulse pickup” circuits via two (2) 12 Volt batteries. The Hands-Off-Cranking Circuit is connected to all Gen Control Cubicles via the Generator Interconnect Terminal Block located in each cabinet. In addition, there will be a small
4GENx3MP Proposal page 7 of 17 Proposed by HHCT
rectifier taking power from the auxiliary generator and supply the required DC power to
|start t||he engine in the black out condition.|
|A||1||Set of CPT’s|
|B||1||Set of fuse|
|C||1||Single phase diode bridge|
- Power Limit Circuit
The Power Limit System will monitor the kW engine loading the KVA generator loading of each engine/generator set. If any of these parameters reach their limits, the Power Limit Circuit will reduce the power being delivered to the loads so that the load on each generator is held at its limit until the loads on the SCR drives are reduced to a level below the generator limit. Percent Power Limit is indicated by a meter on the Drillers Console. Amber warning lamps are illuminated on the front of the Drillers Console at a load level just below the power limit.
- Mud Pump Over-Speed Protection
The Sprocket Slit Circuit provides over speed protection when two (2) motors are paralleled on a single Mud Pump and driven from the same SCR Bridge. If either of the two (2) motors exceeds a preset limit, the Sprocket Slip Circuit will remove power from both motors by opening the DC assignment contactors.
A lighted pushbutton is provided on the front door of the system. The lamp indicates an “over speed trip” and the pushbutton is used to reset the circuit after the over speed trip has been corrected. The Sprocket Slip Circuit compares the current drawn by each DC motor using a “Hall Effect Device” which is mounted between the DC contactor and the motor. The Sprocket Slip Circuit compares the current to the voltage output of the SCR Bridge to determine if an over speed condition exists.
- Drillers Console
The console will be constructed of 12 gauge 304 stainless steel. The throttle hand wheels will be of solid stainless steel and shall provide 100% back up of the throttle function. The console will be water tight with a gasket door. The console will be acceptable for use in a Class 1, Division II area, by means of a Z Purge system in accordance with NFPA 496, when attached to an external dry air supply of 85 to 150 psi. Communication between PLC cabinet and the drillers console will be via special communication cables. Cables enter the bottom of the console via plugs and receptacles.
|A||5||Mud Pump 1 Hand Throttle Mud pump 2 Hand Throttle Mud pump 3 Hand Throttle|
Drawworks Hand Throttle Rotary Table Hand Throttle
|B||7||SCR Assignment Switch Mud Pump 1 “Off/On” Switch Mud Pump 2 “Off/On” Switch Mud Pump 3 “Off/On” Switch Drawworks “Forward/Off/Reverse” Switch Rotary Table “Forward/Off/Reverse Switch PLC Bypass Switch|
|C||6||Rotary Table Ammeter Percent Power Limit Meter Mud Pump 1 Ammeter Mud Pump 2 Ammeter Mud Pump 3 Ammeter Drawworks Ammeter|
|D||17||Generator 1 On Lamp(Amber) Generator 2 On Lamp(Amber) Generator 3 On Lamp(Amber) Generator 4 On Lamp(Amber) SCR 1 On Lamp(Amber)|
SCR 2 On Lamp(Amber)
SCR 3 On Lamp(Amber)
SCR 4 On Lamp(Amber)
SCR 5 On Lamp(Amber) Purge Loss Lamp(Red)
|Mud Pump 1 Aux. [ Amber ] Mud Pump 2 Aux. [ Amber ] Mud Pump 3 Aux. [ Amber ] Drawworks Aux. [ Amber ] Rotary Table Aux [ Amber ]|
|E||4||[ Emergency SCR Shutdown ]|
[ Emergency Engine Shutdown Pushbutton ]
Purge Loss Alarm Silence and Lamp Test Pushbutton Acknowledge Pushbutton
|F||1||Rotary Table Torque Limit Potentiometer|
|G||1||PLC remote I/O|
|H||1||Type Z Pressurization System|
|I||1 Lot||Plugs and Receptacles|
- Foot Throttle
The Foot Throttle is constructed of 12 gauge 304 stainless steel, built to with stand the environment normally encountered on the rig floor. It includes dual stainless steel return springs to provide a fail-safe return to the minimum position in the event of a single spring failure. Provisions for dry air connection are also included. The foot throttle connects directly to the drillers console through a three-wire connection.
- Drawworks Dynamic Brake
The Drawworks Dynamic Brake will slow the Drawworks motor from full speed to some preset speed within 8 to 10 seconds after the foot throttle is released. The power generated by the free wheeling DC motor is then fed into a stainless steel grid resistor bank. During normal operation of the Drawworks, the dynamic brake is non-operative. If at any time, the motor speed is higher than the Drawworks throttle setting and the foot throttle is not in use, the dynamic brake will operate.
- 600 Volt Feeder Circuit Breakers Section
|1||1||Merlin-Gerin MasterPact Circuit breaker for 1250kVA MCC transformer 1600AF/1600AT,600V, 3P, 65kAIC,fixed mount|
|2||1||Merlin-Gerin MasterPact Circuit breaker for TD 1250AF/1250AT,600V,|
|3P, 65kAIC,fixed mount|
MCC transformer feeder breaker located in the Generator 2 cubicles. Top drive feeder circuit breaker located in the Generator 1 cubicles.
- Transformer Section
The transformer is used for power supply for MCC and lighting. The technical data is
|1||1||Copper Wound, Dry Type. 1250kVA, 600:480 V AC,3 Ph, 60 Hz, Del: Wye , MCC transformer|
|1||1||Copper Wound, Dry Type. 112.5kVA, 480:120/208 V AC,3 Ph, 60 Hz, Del: Wye , Lighting transformer|
- 480V Motor Control Center
The MCC will be US NEMA ICS2 standard and GCS type cubicle, wired 480 Volt, 60 Hz, with individual breakers. The horizontal bus will be tin plated copper and 1000 amps rated. The vertical bus will be tin plated copper and rated for 300 amps. A copper ground bus will run the full length of the MCC line up. Each starter will be complete with a 480:120 control power transformer fused on the primary and secondary (magnetic only) breaker, a contactor and an electronic overload relay. Red run indicating light.
HOA= Hands-Off-Automatic Control 2WRC = Two (2) Wire Remote Control PBSS= Pushbutton Stop/Start 3WRC= Three (3) Wire Remote Control AF/AT= Amp Frame/Amp Trip FVNR= Full Voltage Non-Reversing
|1||1||5HP||HOA||Mud pump 1 liner wash|
|2||1||5HP||HOA||Mud pump 2 liner wash|
|3||1||5HP||HOA||Mud pump 3 liner wash|
|4||1||15HP||HOA||Mud Pump 1A blower|
|5||1||15HP||HOA||Mud pump 1B blower|
|6||1||15HP||HOA||Mud pump 2A blower|
|7||1||15HP||HOA||Mud pump 2Bblower|
|8||1||15HP||HOA||Mud pump 3A blower|
|9||1||15HP||HOA||Mud pump 3Bblower|
|10||1||15HP||HOA||Drawworks A blower|
|11||1||15HP||HOA||Drawworks B blower|
|12||1||15HP||HOA||Rotary table blower|
|13||1||15HP||HOA||Drawworks lube oil pump|
|15||1||100HP||3WRC||Mud mix pump 1|
|16||1||100HP||3WRC||Mud mix pump 2|
|17||1||100HP||3WRC||Mud mix pump 3|
|18||1||100HP||HOA||Charging pump 1|
|19||1||100HP||HOA||Charging pump 2|
|20||1||100HP||HOA||Charging pump 3|
|22||1||100HP||3WRC||Mud shearing pump|
|9||1||100AF/15AT/3P||Air dryer to be sized as per equipment load review|
|10||1||100AF/30AT/3P||Universal owner supplied wireline unit|
|14||1||100AF/100AT/3P||Water transfer pump|
|15||1||100AF/100AT/3P||Brake water pump|
|16||1||100AF/100AT/3P||Fuel transfer pump|
|17||1||200AF/150AT/3P||Rig air compressor 1|
|18||1||200AF/150AT/3P||Rig air compressor 2|
- 208/120 Volt Lighting Panel
One (1) 42 circuit 120Y208 volt, 3 phase, 4 wire panel board. The circuit panel will be a 208/120 Volt, 3 phase, 4 wire, Panel feed from the lighting transformer
|1||1||120||15AT/1P||SCR house interior lighting|
|2||1||120||15AT/1P||SCR house duplex receptacles|
|3||1||120||20AT/1P||Generator skid #1 lighting|
|4||1||120||20AT/1P||Generator skid #2 lighting|
|5||1||120||20AT/1P||Generator skid #3 lighting|
|6||1||120||20AT/1P||Generator skid #4 lighting|
|7||1||120||20AT/1P||Solids control area #1 lighting|
|8||1||120||20AT/1P||Solids control area #2 lighting|
|9||1||120||20AT/1P||Solids control area #3 lighting|
|10||1||120||20AT/1P||Solids control area #4 lighting|
|11||1||120||20AT/1P||Water tank lighting|
|12||1||120||20AT/1P||Trip tank lighting|
|13||1||120||20AT/1P||Fuel tank lighting|
|14||1||120||30AT/1P||Generator #1 heater|
|15||1||120||30AT/1P||Generator #2 heater|
|16||1||120||30AT/1P||Generator #3 heater|
|1||120||30AT/1P||Generator #4 heater|
|17||1||120||30AT/1P||Drawworks a motor heater|
|18||1||120||30AT/1P||Drawworks b motor heater|
|19||1||120||30AT/1P||Rotary table motor heater|
|20||1||120||30AT/1P||Mud pump 1A motor heater|
|22||1||120||30AT/1P||Mud pump 1B motor heater|
|22||1||120||30AT/1P||Mud pump 2A motor heater|
|23||1||120||30AT/1P||Mud pump 2B motor heater|
|24||1||120||30AT/1P||Mud pump 3A motor heater|
|25||1||120||30AT/1P||Mud pump 3B motor heater|
|28||1||120||20AT/1P||Pump room lighting|
- System Host PLC
The System Host PLC is a high speed, versatile modular mini-PLC. The PLC is used for serial communication with remote consoles and other rig devices. Additionally, the PLC incorporates the SCR bridge assignment logic. The PLC shall consist of the following
|A||Siemens S7-300 Modular PLC|
|B||32 Bit, Fixed & Floating Point CPU|
|C||Up To 1024 Digital Inputs / 1024 Digital Outputs|
|D||Up To 256 Analog Inputs / 256 Analog Outputs|
|E||Complete Instruction Set With “Built-In” Functions|
|F||Built-In Self Diagnostics|
|G||Special Cable for Communication|
- Power Control House
The power control house will be not more than 13500 mm long, 3000 mm wide and 3100mm high. And weigh approximately 35,000 kg.
The house will be designed for transportation by an oilfield type trailer. The frame of the house will be constructed of structural steel and continuous welded. The siding of the walls and skins of the roof will be constructed of twelve (12) gauge sheet steel. All corners shall be trimmed out by bending, and seam welding leaving no sheet edge exposed. The runners of the skid will be 45# beams, with integral cross members for a total skid height of 12.25 inches.
Three of the walls will be insulated with three (3) inch thick polystyrene block insulation. The floor and end wall with the receptacles will not be insulated. The inside surface of the walls behind the equipment will be covered with veneer of 5mm thick. The inside surface of the walls not covered by equipment will be finished with aluminum panels. A rubber neoprene mat will run the full length of the interior isle of the house.
Two (2) doors with stainless hardware will be provided. The door will open to the outside by pushing down on a “panic bar”. A %” welded eye will be put on both sides of the doors for lockout.
Two (2), seven and half (7.5) ton air conditioners will be supplied. The units will be TRANE split system type with the condenser unit (compressor and coil) will be located on an elevated rack on the porch on one end of the house. The top of the condenser unit will be no higher than the top of the house roof. The air handler unit (evaporator coil and fan) will be located with in the interior portion of the house. The hot air generated by the SCR bridges will be discharged out the top of the cubicles and re-circulated to the air conditioners via the open space between the top of the equipment and the bottom of the roof, and the cool air along a vented central duct running the length of the House.
One (1) 120Y208 volt, 3 phase, 4 wire panel board will be mounted on an interior wall for lighting and other required needs. The interior of the house will be illuminated by four (4) flush mount fluorescent lighting fixtures(2-40WRS). The 120 volt, 60 Hertz devices will be mounted in the suspended ceiling in the isle way between the SCR line-up and the MCC lineup. One (1) emergency lighting fixture with battery back up and self-charge capabilities will be provided. Two (2) 120 volt duplex receptacles will be included, one at each end of the house
Incoming power from the generators will enter the house via lugs on copper stabs through a recessed “window” located at the top and on one (1) side of the house. The windows shall be located on the same side of the house as the SCR system. DC power connections will be made using single pin connectors in the AC/DC plug panel at one (1) end of the house. DC control connections. The receptacles (100 amp and below) will be angled down at 45 degrees to relieve stress on the cables.
The house will be sandblasted and finished with a two (2) coat process consisting of an epoxy primer and a polyurethane top coat, white in color. The transformers, A/C Condenser Units and the DWDB grid box will be mounted on an uncovered porch on one end of the house.
Control wires in the SCR/generator cubicle are single conductor apparatus cable rated 600Volts or 2000Volts, AC or DC, insulated a thermosetting (cross-linked) flame retardant polyolefin, for normal operation at 125 deg C. These cables are designed for use on mobile offshore drilling units (MODU’S), aboard ships and offshore fixed platforms.
- Cable And Accessories
Whole set of power and control cables include:
Power and control cables in SCR house will be furnished by HHCT. DC power cable will be one (1) 535MCM every phase.
All the power and control cables out of SCR house will be furnished by customer. DC power cable will be one (1) 535MCM every phase.
All of the connector (plug and receptor) which connected to SCR house will be furnished by HHCT and made in China
- Technical Documentation
|A||5||User menu(English version)|
|B||5||Customer drawing job books|