DC Drive System

DC Drive System

DC Drive system comprises generator controls, SCR controls, Driller's console, AC/DC control module, SCR or AC Power Control House. Do contact us for further sales enquiries.

Generator Controls:

Multi-function instrument / meters
Accurately control engine speed and generator voltage
Ground fault detection system
Synchronizing panel
Power limit circuit
Analog or digital controls
Multi-protection of engine generators

SCR Controls:

Rectifier bridge rated at 2000 amps continuous at 750 volts DC
Surge suppression system
Multiple assignment of the SCR rectifier bridges through the use of contactors
Digital or analog controls
Lockout switches for each motor
PLC

Driller’s Console

The console is located on the drill floor and is the main control and monitoring device for each drive function fo the drilling rig. It contains the control switches for the SCR assignments, throttles for each motor, rotary table torque limit control, and drawworks or rotary table reversing, selection switches, instruments, push buttons.

Explosion-proof pressurization system with alarms
Drip-proof stainless steel construction
Foot throttle for control of the drawworks during hoisting
PLC-based control equipped with cable bypass for spare use.
Indicator lamps
Touch screen and display screen

AC / DC Control Module

TSC Offshore's AC / DC Control Module distinctive competency lies in the reduction of all vital electronics for the AC and DC functions of the system to a single circuit board.

All modules of each type are interchangeable and identical for replacement in minutes. The modules are hard-wired to eliminate loose connections caused by vibration. Each module is subjected to rigorous testing to eliminate any inferior components. Modules are calibrated at the factory and require no adjustments in the field. Service and troubleshooting of the system is minimized.

The AC module comprises the electronics for automatic control of the engine generator set:

Electronic engine governor
Electronic generator voltage regulator
Automatic load sharing circuit for parallel operation
Reverse power, under-frequency,over-frequency, pulse loss and over-voltage protection

The DC module comprises the electronics for automatic control of the SCR converter:

Automatic load sharing system for the drawworks, rotary table and mud pumps' motors
SCR firing circuits with ‘hard firing pulse’ output
Gate suppression at approximately 150% of the highest single motor current limit
All controls are designed to be ‘fool-proof’
Individual control of current limits for all drilling functions
Zero throttle interlock

The power control house provides the features of economic operation maintenance, compactness, and portability. The house contains the SCR or AC drives, generater control cubicles and other associated equipment to include motor control center, drawworks dynamic brake control, transformers, and AC cooling units. The self-supporting power control house is mounted on a three or four runner oilfield skid. Lifting eyes or a drawbar at each end of the house are provided for transportation on a trailer.

Factory wired and thoroughly tested as a complete system prior to shipment
Weatherproof AC and DC connectors are located on one end to the house

NI-MH Rechargeable battery

Stretch Cloth



Stretch cloth constructions are as follows:
40x40+40D / 133X72;
32x32+40D / 188x80, etc.
Width: 48"-50"

Regular Sell cotton...
cotton semi-elastic irregular basket canvas

Yarn Dyed 100%cotton Fabric...
Width: 57"/58"
Specification: 16*16/80*64 21*21/68*54 21*16/80*64 We specialize in dyeing and finishing of T/C fabric, high count and high density cotton fabric, spandex stretch fabric, canvas fabric, single yarn drill fabric, cotton corduroy fabric, C/N & N/C fabric, cotton printed fabrics with 44?140?width, oxford fabric and various chemical fiber fabric. We also perform high quality carbon peach process, air wash process, all sorts of coating processes, gold printing and film coating processes.
Related Keywords: cotton, printing, dyeing, fabric

100% Cotton Twill

100% Cotton Twill:

Specification	Width	Weight	Component	Quantity
10*7/70*42	56/57″	320g/m2
16*12/108*58	57/58″	285g/m2
20*16/128*60	56/57″	245g/m2
20*20/108*58	57/58″	200g/m2
32*32/130*70	57/58″	155g/m2

Cotton Satin
cotton satin, 80Sx80S, width: 57/58, the fabric for woman garment is very well.Specification:80sX8

Toddler 100% Cotton...

toddler bedding set,100% cotton quilt cover,embroidered bedding set 1)Fabric introduction: yarn-dyed cotton fabric Yarn count/ Density of yarn-dyed cotton fabric：40S*40S/110*70， 40S*40S/110*80， 40S*40S/110*90 and so on the width of yarn-dyed cottonfabric: 230CM，250CM 2) Size: twin/full/queen/king 3)Comprising:2pcs:1 quilt cover+1pillow case or 1flat sheet +1pillow case or 1 fitted sheet +1 pillowcase 3pcs:1 quilt cover +2 pillow cases or 1 flat sheet +2 pillow cases or 1fitted sheet+2 pillow cases 4pcs: 1 quilt cover +2 pillow cases + 1 flat sheet or 1 fitted sheet + 2 pillow cases +1 flat sheeet or 1 quilt cover +1 fitted sheet + 2 pillow cases P.

S.:We can customize products for you according to your special demand.many colors,many sizes,many pcs can be available. 4)Technics description:the face of quilt cover and pillow cases is embroidered cotton fabric, the back is yarn-dyed cotton fabric. 5) inner packing:pvc bag with picture and cardboard attached.

Outer packing: Carton .A carton can contain about 20 sets. 40’ can contain about 10000-16000 sets,20’ can contain about 3000-5000 sets. or according to your special demand. 6)MOQ:300 sets 7)supply ability:2000 sets per day 8)delivery：10-20 days after confirmed We can customize products for you according to your special demand.

Regular Sell cotton...
cotton semi-elastic irregular basket canvas

100% cotton poplin

If you interested in our product ,please contact me ,I will give you competitive price with high quality 
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