AUTOCAD DRAWING

Figure 3.3 Shows AutoCAD footer

• Managing AutoCAD drawing
• Redraw site layout
• Added lack of equipment at panel layout

ACTIVITY 1: Managing AutoCAD drawing

0BJECTIVE: To make sure all AutoCAD drawing following standard.

DESCRIPTION
Scale: NTS
Drawn: CD ELECTRICAL
Designed: CD ELECTRICAL
Checked: HLA ASSOCIATES
Approved: SYABAS


PROCEDURE
I. Check all drawing following standard.
II. Change if not following standard.

LEVEL SENSOR INSPECTION

GENERAL
1 All equipments used shall be of SYABAS approved model/brand.
2 LT Instrument used shall be using 24 VDC power supply.
3 LT Junction Box is arranged according to approved drawing.
4 All unused holes are fitted with rubber/silicone seals and not loose.
5 Cleanliness of equipment. Should be free from dust, rust and corrosion.

CABLING
1 Signal cables shall be 1.5mmsq. Screen cable shall be connected at earth
point at the RTU Panel or Junction Box.
2 Signal cables are properly labelled.
3 All cables shall be arranged properly and neatly. All connection shall be tight
and not loose.
4 All armoured cables leaving/coming to enclosure shall be properly fitted with
gland ring and connected to earth point.

EARTHING
1 Lightning arrestor (LPU Cat 3) shall be connected to earth point and earth
cable shall be 4.0mmsq.
2 All earth cables inside panel shall be 2.5mmsq and main earth cable shall be
6.0mmsq.

Functionality Test

Figure : Shows auto reset at ELCB

OBJECTIVE: All equipment on RTU panel can be operating well.

PROCEDURE:

1. Turn ON MCB1 and ELCB to test trip at the ELCB.

(For panel using TNB supply, test auto reset after push trip button at the ELCB. Auto reset can turn ON back ELCB after two minutes.

1. Turn ON MCB2 for:

· Door Switch

· Fluorescent Lamp

· AC Socket (Use alternatives, for example plug in laptop.)

· Make sure all function.

2. Turn ON MCB3 for:

· I/O modules

· Set voltage at battery charger 27.05V.

Continuity Test

Figure : Shows ELCB and MCB

PROCEDURE:

1. Turn ON ELCB, MCB1, MCB2, MCB3 and MCB4.
2. Using multimeter, check connectivity L-L, N-N, E-E.
3. After check connectivity complete and no short circuit, turn on power supply.

Level Transmitter

SITRANS Probe LU is a 2-wire loop-powered ultrasonic transmitter for level, volume, and flow monitoring of liquids in storage vessels and simple process vessels, as well as in open channels.

The transducer is available as ETFE (ethylene-tetrafluoroethylene) or PVDF (polyvinylidene fluoride) to suit the chemical conditions of your application. For applications with varying material and process temperatures, the Probe LU incorporates an internal temperature sensor to compensate for temperature changes.

SITRANS Probe LU uses field-proven Sonic Intelligence ® signal processing.

Applications

Level, volume or flow

SITRANS Probe LU is designed to measure levels of liquids in a variety of applications:

• Storage type vessels

• Simple process vessels with some surface agitation

• Liquids

• Slurries

• Open channels

Pump House Panel

Reservoir Panel

Inside the panel, the right bottom is called as RTU (Remote Terminal Unit), the left bottom is known as CPU.

Below is example of the signal strength of the reservoir site

Fig 2- signal strength of reservoir

From this figure, I get to know the status of site119 is in GOOD status and the sim card that using Digi. Beside that, it also display the temperature of the modem,45 Celsius and is in the normal status, if the temperature too high, it will spoil the modem. To solute this problem, in the panel, we will fix one fan that need 24V to suck the hot air out. The way of checking the signal strength in pump house is different. Here is the figure that shows the pump house signal strength.

Fig1- pump house

The pump house as show above seems like the paip water that we use in house. When the reservoir need water, the pump will open not using in man hand but control fro m the command centre no matter how far the site from the command centre. If let say I want to off the pump 2, I can do it in the WinCC page. Normally, the site page not only display the water level, size of water tank but also the pressure.

my Supervisor Mr. Liew to go SYABAS command centre there to learn the WinCC software. Wincc represent as Window Control Centre. This software is help us to collect the data from variety of site and send it to command centre. Inside the WinCC, it provides many systems that used for design the product or give the information about the site status. This is one of the example figure about the by after creating from WinCC graphics design and using the C-script.

COMPANY PROFILE

Precision Control was established in 1985. In taking its place on the regional stage and in all aspects of national development, Precision Control Group of Companies have successfully supplied, commissioned and supported installations over the region. With businesses located in Malaysia, Singapore, Thailand, China and with alliance partners worldwide, we bring depth and breadth of expertise, experience and unparalleled efficiency across the region and in the country to meet your automation and control needs.