Merald Technology Solutions

Electrical Audit Report for

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Electrical Audit Report for

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Auditor:

Merald Technology Solutions Nigeria Ltd, RC 615901 Technology Solutions Nig Ltd., RC: 615901 1

Electrical Audit Report for No 2, Owhor Street, Opposite Swiss Garde, Stadium Road Port-Harcourt, Rivers state Nigeria

Technology Solutions Nig Ltd., RC: 615901 2

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Electrical Audit Report for

Date of Audit 2nd December - 4th December 2009

Date of Report 7th December 2009

Technology Solutions Nig Ltd., RC: 615901 3

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Electrical Audit Report for

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Contents Table of Contents Electrical System block diagram................................................................................5 Ground Floor Main Hall..............................................................................................6 Consumers..................................................................................................................6 Comments.............................................................................................6

Ground Floor Front.....................................................................................................7 Consumers..................................................................................................................7 Comments.............................................................................................7

First Floor Main Hall...................................................................................................8 Consumers..................................................................................................................8 Comments.............................................................................................8

First Floor front............................................................................................................9 Consumers..................................................................................................................9 Comments.............................................................................................9

Second floor Main Hall..............................................................................................10 Consumers................................................................................................................10 Comments...........................................................................................10

Second Floor Front.....................................................................................................11 Consumers................................................................................................................11 Comments...........................................................................................11

External Electricals....................................................................................................12 Statistics....................................................................................................................12 Generator Set..............................................................................................................13 Comments.................................................................................................................13 Change Over Switch...................................................................................................14 Comments.................................................................................................................14 200 MEM Gear Switch..............................................................................................15 Comments.................................................................................................................15

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Bus Bar Panel.............................................................................................................15 Comments.................................................................................................................15 Earthing System.........................................................................................................16 Comments.................................................................................................................16 Lightning Arrestor.....................................................................................................16 Comments.................................................................................................................16 Fire Alarm Panel........................................................................................................17 Comments.................................................................................................................17 NO Load Reading.......................................................................................................18 ON Load Reading.....................................................................................................18 Electrical Safety Audit Checklist..............................................................................19 Summary Report Form - Electrical Audit Action Plan..........................................21

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NEPA SUPPLY

GEN 37KVA

4c x 25mm2 PVC/SWA/PVC 4c x (1c x 16mm2) PVC Aluminum Conductor

MEM 63 A GEAR SWITCH

4c x 25mm2 PVC/SWA/PVC

250 A MCCB

250 A MCCB

CHANGE OVER BREAKER PANEL

4c x (1c x 16 mm2) PVC Aluminum Conductor 100A GEAR SWITCH MEM MAKE

MEM- 200A BUS BAR PANEL

FOR GF

MAIN HALL

100A FEDERAL ELECTRIC DB

FOR GF

MAIN HALL

FOR SF

100A FEDERAL ELECTRIC DB

FRONT TOILET/

100A FEDERAL ELECTRIC DB

FOR FF

TO EXTERNAL STREET LIGHT

CHANGING ROOM

FOR FF

KITCHEN/TOILET

MAIN HALL

100A FEDERAL ELECTRIC DB

FOR SF

100A FEDERAL ELECTRIC DB

FRONT TOILET/

100A FEDERAL ELECTRIC DB

ELECTRICAL SYSTEM BLOCK DIAGRAM Technology Solutions Nig Ltd., RC: 615901 6

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GROUND FLOOR - MAIN HALL Size of DB Size of ELCB Size of Isolator Size of MCB

-

8-way 100 Amps Federal Electric Not installed 100Amps 3-pole MEM 30A (8), 25A (5), 20A (3), 15A (5), 10A (3)

-

05 16

CONSUMERS  AC Split Units 1.5 HP  (4x16W) Louver fittings

COMMENTS  ELCB is not installed in DB. In case any consumer gets earthed, there is no protection.  There is only a two phase supply on DB instead of three phases.  There is very poor illumination in the hall as only three light fittings are working. The total number of installed fittings are 16. o As no voltage drop was noticed, the reason for not working of these fittings is either  Defective wiring and/or  Fittings are defective (Ballast, starter tube) o This needs to be checked urgently. urgently.

 There are no legends of DB wiring. This is making trouble shooting difficult. difficult.  Power cables each 1Cx 8mm are tapped from incoming of DB Isolator. This is to feed power to GF DB, installed for security changing room and toilets. As a result, DB looks jammed and unsafe for maintenance and troubleshooting.

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GROUND FLOOR - FRONT [Security changing room, toilet and staircase] Size of DB Size of ELCB Size of Isolator Size of MCB

-

4-way 100 Amps Federal Electric Not installed 100 Amps 3-pole MEM 30A (2), 25A (4), 20A (1), 15A (2), 10A (1)

-

1(1.5HP,230-240V,50-60Hz) 4

CONSUMERS  Bore hole Pump  Bulbs and fittings connected

COMMENTS  There is no incoming power to DB for the last several months. Therefore,      

the bulbs, fans etc are not functioning. Incoming power is tapped from the main hall DB instead of the bus bar panel. Wiring has a problem so it needs to be fixed immediately. immediately. There is no legend of DB wiring. Size of Isolator is very high and so are the sizes of MCBs, as connected load is very low. Two MCB are missing from DB. There is no protection equipment installed to protect the system from earth leakage current

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FIRST FLOOR - MAIN HALL Size of DB Size of ELCB Size of Isolator Size of MCB

-

8-way 100 Amps MEM Not installed 100 Amps 3-pole MEM 30A (5), 25A (7), 20A (6), 10A (6)

-

6 (1.5HP,PANASONIC) 16 (4X16W)

CONSUMERS  AC Split Units  Louver fittings

COMMENTS  DB is powered with two phase supply only. only.  Similar to ground floor DB, two phase power is tapped from incoming of the       

Isolator to feed power to kitchen DB. There is no legend for electrical wires going out from the panel DB wiring is clumsy, making it difficult to measure voltages and load current. Since most of the time there is no power, the fire alarm system remains mostly non-operational. This is because its UPS can only sustain for half an hour. No emergency light was seen in the big hall. The illumination level is low as most of the fittings are non-operational. 13Amps SSOs are connected in ring with 2.5 mm2. These were found to be OK. OK. Similarly, 15Amps SSOs connected in radial with 4mm2 wire is OK. OK.

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FIRST FLOOR - FRONT [KITCHEN AND CHANGING ROOM] Size of DB Size of ELCB Size of Isolator Size of MCB

-

4-way; 100 Amps MEM Not installed 100Amps 3-pole MEM 30A (2), 25A (3), 15A (4), 10A (3)

-

1 1 1 2

CONSUMERS    

Refrigerator Micro wave oven Water Dispenser Electric kettle

COMMENTS  The ring wired circuit of single 13Amps socket outlet supplies power to o o o o

   DB.

Refrigerator Microwave oven Water dispenser Electric Kettle. The power cable between 13A SSO to consumer is sagging. All bulbs were found to be fused. No earth leakage protection equipment is mounted in the incoming

There is only two phase incoming supply at DB Isolator, tapped from first floor main hall DB isolator, instead of a three phase supply from bus bar panel.  No legend of DB wiring.  Size of DB and Isolator is high.



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SECOND FLOOR - MAIN HALL Size of DB Size of ELCB Size of Isolator

-

8-way 100Amps MEM Not installed 100Amps 3pole MEM

-

2 (3phase,4.8KW power) 16 (4x16W)

CONSUMERS  AC Split unit  Louver fitting

COMMENT  Three phase power is tapped from Isolator incoming for another DB.  Also three phase power is tapped for supplying power to Air conditioning units  No earth leakage current protection system is installed.  Only one split AC is working while second one’s compressor is not functional.  Light illumination level is low as most of fittings are non-functional. It needs wiring and fitting to be checked and fixed.  There is no emergency light installed.

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SECOND FLOOR - FRONT [Changing room] Size of DB Size of ELCB Size of Isolator Size MCB

-

4-way, 100Amps MEM Not installed 100Amps, 3 pole MEM 25A (3), 20A (7), 15A (2)

COMMENTS  DB incoming supply is tapped from second floor main hall DB Isolator’s incoming.  No ELCB is installed in DB to protect the system from earth leakage current.  Isolators and MCB are oversized.  In general illumination level is low. low.

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EXTERNAL ELECTRICALS STATISTICS No of fittings Broken glass Broken fitting

-

15 (400w) 1 1

COMMENTS  The perimeter lights are all in one circuit (radial), terminated to a 32Amps             

gear switch.MEM Gear Switch is mounted on the fence behind the main building. The fittings are looped with a 2.5 mm2 PVC/SWA/PVC cable and they are terminated with 3c x 1.5mm2 industrial flexible cords. The poles are not earthed. earthed. Termination at the JB is not neatly done. done. Some of the 6” x 6” boxes used to conceal the connections between loops and fitting rid connectors are not earthed, not covered and are not made in screw. Some of the fittings are dirty and have debris inside. Some of the fittings mounted on the security posts are unearthed and cables are flying around the post, not concealed. 33KV NEPA lines are passing through the base yard. The overhead line is recommended to be replaced with underground XLPE cable. One perimeter fitting is broken in pieces and is hanging behind the diesel tank. Junction boxes appear to be IP55 but water was seen inside. There is no terminal strip inside the junction boxes. Wires are directly joined using pliers. No PVC gland is used; therefore, the possibility of water, dust and insects entering the region is high. Galvanized 20mm conduit is recommended in place of existing plastic PVC conduit pipe. External wall mounted bulkhead fittings (2) are hanging. It is IP41, while it should be IP55.

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GENERATOR SET [37KVA, DUEZ MAKE, AIR COOLED] COMMENTS  There is no electrical lighting point in generator room.  There is no emergency light installed.  The following indicators in the Genset are nonfunctional  Engine RPM meter  Engine HR meter  Engine Oil Pressure  Generator Frequency Meter  Generator Voltage Meter

 Engine speed and thus frequency goes on changing as it is controlled  

 



manually with two naked wires joint together, which often get loosened. During the audit period, frequency got down twice. Genset body is not earthed at all. No earth pit and earth chamber could be located. There is no separate earth cable from Genset to 63 Amps gear switch installed in Genset room. 4C Cable AL armor is used as earth cable from 63A gear switch to 250A Change over Switch. 25mm2 cu armored cable is sagging/hanging in changeover switch room.

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CHANGE OVER SWITCH COMMENTS  There are two 250 Amps 3pole breakers installed inside the 100Amps BILL

changeover panel. One is connected to the Genset while the second breaker is connected to PHCN 16 mm2 1C AL cables. There is NO interlock (Mechanical or Electrical).In Electrical).In case both the breakers are ON at the same time, it might cause serious problems.

 Bottom plate of Change over switch is removed enabling easy access to

animals and insects. This can lead to short circuit.  No cable gland is used for generator cable connection.  No cable trucking is used for PHCN cable and generator set cable.  Power cable for external lighting is directly connected to Change over switch.  External cables from Change over switch are hanging /sagging in change over panel room. No trucking is used.  Changeover switch of 250Amps is highly oversized for 65A maximum capacity Genset.

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200A MEM GEAR SWITCH COMMENTS  Top cover is open and cables from gear switch to bus bar panel are not well connected.  Cable wire color code is not correct. Black wire is used for Y phase and the same color is used for Neutral also.

BUS BAR PANEL COMMENTS  In coming cable insulation is over heated.  However, top entry of cable is properly connected.

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EARTHING SYSTEM COMMENTS  Earthing pit and earthing chamber could not be located therefore earth resistance could not be measured.  None of the electrical panels like DBs, Gear Switches, Bus bar panel, Genset body are properly earthed.

LIGHTENING ARRESTOR COMMENTS  Lightening arrestor is not connected to the earth chamber. Rather, an earth

copper strip is directly going to earth. Earth resistance could not be measured as there is no earth chamber.

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`

FIRE ALARM PANEL COMMENTS  It has been observed that there is frequent power failure as PHCN power is

disconnected for the last two months and the Genset remains under breakdown very frequently. Last month there was no power for more than two weeks. Under such a situation the fire alarm system will be nonfunctional as its UPS could last only half an hour. In case of a fire, the system will fail and there would be serious consequences.

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NO LOAD READING Vab (volts)

CHANGE OVER SWITCH 200A GEAR SWITCH GF MAIN DB FF MAIN DB SF MAIN DB SF FRONT DB

Vbc (volts)

Vac (volts)

Va-n (volts)

Vb-n (volts)

Vc-n (volts)

390

389

390

225

224

223

388

390

390

222

224

223

0

388

390

221

230

230

0

388

390

224

226

224

390

389

390

225

227

226

389

389

389

225

227

226

Ia (amps)

Ib (amps)

Ic (amps)

In (amps)

-

-

-

-

-

-

-

-

-

-

-

-

Ia (amps)

Ib (amps)

Ic (amps)

In (amps)

Remarks

ON LOAD READING Vab (volts) CHANGE OVER SWITCH 200A GEAR BREAKER DB GF MAIN FF MAIN DB SF MAIN DB SF FRONT DB

Vbc (volts)

Vac (volts)

Va-n (volts)

Vb-n (volts)

Vc-n (volts)

390

389

390

225

226

218

34.00

49.90

50.00

27.00

388 0 0 385 384

388 384 388 385 385

389 385 385 384 384

225 216 215 211 211

224 214 215 217 216

218 214 214 220 220

34.00 11.00 0.54 11.00 0.50

48.00 7.20 9.00 10.00 1.40

49.00 11.10 9.40 11.00 1.80

24.00 2.50 12.00 2.30 2.00

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Remarks

Electrical Audit Report for

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Electrical Safety Audit Checklist Issue Date: 4th Dec 2009

Portfolio:

Electrical Audit

Service Unit:

Complete SLB Archive Base

Location inspected:

Schlumberger Archive Base, East-West Road P/H

Inspected by:

Yogendra Singh, D.Parikh, Er. Akujobi Sylvestar

Date of inspection:

2nd Dec to 4th Dec, 2009

Status Yes No Has portable electrical equipment including extension leads and power boards been tested and tagged in accordance with the Guideline for Testing of Portable Electrical Equipment?

N/A

Do all power boards have thermal overload switches?

N/A

Are all Test and Tag test dates current?

N/A

Is all equipment maintained in good condition and inspected regularly and records kept?

N/A

Are all electrical incidents reported?

N/A

Are earth leakage current devices (ELCB’s) installed in the circuits?

N

Have ELCB’s been checked to ensure they are working correctly?

N/A

Has a risk assessment been conducted on electrical equipment?

N/A

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Have all people been trained in the use of all equipment?

N/A

Are training records kept for the safe use of all equipment?

N/A

Has earth resistance of all earth chambers measured and maintained below the limit?

N/A

Are all lighting fittings and Power boards in good condition?

N

Are any leads causing a trip hazard?

N

Are out of service tags for faulty equipment available and used?

N

Have staff received a general Electrical Safety Induction?

N/A

Is a safety manual available and distributed to staff?

N/A

Has fire alarm system been tested

N/A

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Summary Report Form --- Electrical Audit Action Plan Electrical Audit

Portfolio:

SLB Archive Base

BASE Location inspected:

Schlumberger Archive Base, East-West Road P/H

Inspected by:

Merald Technology Solutions Nigeria Ltd

Date of inspection:

2nd Dec to 4th Dec, 2009

Location

Issue/ Hazard

Proposed Action

GF - Main hall

Illumination is very low as 13 out of 16 fittings are not working

Electrical wiring and/or fittings must be checked and fixed ASAP

GF - Front

DB has no power supply so, no lighting points, sockets etc of guard changing room are working

Wiring of DB supply has to be checked and fixed

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Responsibilit Completion Complet y Date ed Y/N SLB

SLB

-

-

-

-

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GF and FF DBs

Only two phase power is connected

Connect three phase supply

SLB

-

-

GF and FF front DBs

Incoming supply is tapped from Main hall’s respective DBs

Connect power from Bus Bar Panel

SLB

-

-

Earthing

Proper earth pit and chamber should be made and a separate earth cable should run for earthing the electrical panels

SLB

-

-

Fire Alarm

Insure power supply to fire alarm control panel by keeping PHCN and Genset operational

SLB

-

-

DBs

Earth leakage current protection

Install ELCBs

SLB

-

-

Changeove r Switch

1)No interlock with PHCN power and Gen set power 2)Breakers are oversized

Mechanical/Electrical interlock to be provided to avoid bridging of PHCN and Genset power and reduce size of breakers

SLB

-

-

Panel top is open and one live cable and N-cables are black color

Fix the problem by covering top and use red cable for live line

SLB

-

-

Whole Base

Main building

200Amps Gear Switch

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Electrical Audit Report for

GEN SET

PHCN Power

External Electricals

Very bad condition

Indicators and governer system must be fixed, Gen body should be earthed, Power cable should pass through truncking, and should be well glanded before termination.

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SLB

-

-

Disconnected since last two months, 33KV overhead wires passing through base

Needs to be reconnected and an underground XLPE cable should replace overhead wire between two poles

SLB

-

-

Broken fittings, glass hanging bulkhead fittings, JBs and terminal Strips ,bore hole pump breaker

Needs to be fixed

SLB

-

-

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