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CSS sahara_02_04_instructions.doc

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All shipping members have been removed.

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There is no obstructions in or near the openings for ventilation.

[  ]    No tools or other articles are left inside the enclosures.
[  ]    All protective covers are in place or closed and bolted tight.

MAINTENANCE AND PERIODIC INSPECTION

In order to assure a long lifetime and correct and reliable operation of equipment delivered for this facility
it is of utmost importance to perform maintenance regularly.

Following general rules should always be considered before starting maintenance activity.

1.

Authority from responsible engineer 

shall always be obtained 

before 

starting any maintenance.

2. Follow 

safety procedure established

 in carrying out the work.

Realize  that no set of safety

 or maintenance instructions 

will ever be written that can adequately cover all

accident possibilities.

Therefore 

"SAFETY" 

as dictated by actual current conditions, always takes precedence over any

previously prepared safety or maintenance instructions. 

Assume nothing

Take the precautions that you

personally deem necessary in addition to those included in standard practice.

Be familiar with the drawings and previous test records before starting activity.

Scrutinize maintenance instructions given for the equipment to be maintained.

Maintenance information is given in the Operation and Maintenance Manual for each type of equipment.

The main dangers of such process are:

Inaccessible lubrication points (greased for life) cannot be lubricated and may seize up.

Areas not lubricated may be subject to corrosion.

The high-pressure spray may damage equipment.

Especially protective coatings may be removed.

Bolt Tightness

All  connections should be tight and secure. Bolts and nuts on busbar and terminal lugs should be
torqued and marked properly.

Inspection and Testing

The need for preventive maintenance will vary  on operating conditions. Where heavy dust conditions
exist, an accumulation of dust on the equipment may effect the operation of unit substation and its
protective apparatus.
When  normal maintenance inspection and cleaning of bus connections, relays, lug connections, and other
part of the distribution system is being made, it is  advisable  to  operate and check circuit breaker or
switch-disconnector operation. The following procedure is highly recommended.

Personal Caution is your best Safeguard

IMPORTANT

We draw your attention to the risk involved in using any cleaning process based on the
high pressure spraying solvent of an insulating solvent.

Содержание SAHARA 1000

Страница 1: ...ipment ABB Electrical Industries Co Ltd Kingdom of Saudi Arabia ABB SAHARA Series Compact Substation OPERATING INSTRUCTIONS MODELS 24kV 36kV SAHARA 500 SAHARA MAX 1 SAHARA 1000 SAHARA MAX 2 SAHARA 1600 SAHARA 2000 SAHARA 3000 ...

Страница 2: ...cal Inspection 7 MAINTENANCE AND PERIODIC INSPECTION 7 Bolt Tightness 7 Inspection and Testing 7 Routine Field Testing 8 1 Insulation Resistance Test 8 2 Connection Test 9 3 Mechanical Operation 9 TRANSFORMER MAINTENANCE 9 Inspection during operation 9 Maintenance during operation 9 Inspection and Measures to be taken during downtime 9 Inspection of oil leaks and precautions to be taken 9 Inspecti...

Страница 3: ...rtance of care in Site selection and design embodying features that provide adequate ventilation protection and security and which have taken account of appropriate fire moisture and explosion hazards Jointing Earthing Selection and setting of electrical protection in primary and secondary against overload overvoltage and short circuit Carrying out regular inspection and electrical and mechanical ...

Страница 4: ...ion has not sustained any damage during transportation Immediately upon receipt of the Package Compact Substation examine them to determine if any damage or loss was sustained during transit If abuse or rough handling is evident file a damage claim with carrier and promptly notify the nearest ABB office ABB ELECTRICAL INDUSTRIES CO LTD is not responsible for damage of goods after delivery to the c...

Страница 5: ... LIFT OR MOVE A TRANSFORMER OR PACKAGE COMPACT SUBSTATION WITHOUT ADEQUATE EQUIPMENT AND PRECAUTIONS 2 TERMINALS ARE FOR ELECTRICAL LOADING ONLY 3 DO NOT MAKE ANY CONNECTIONS THAT ARE NOT AUTHORIZED BY THE NAMEPLATE OR CONNECTION DIAGRAMS 4 DO NOT ENERGIZE THE SUBSTATION WITHOUT PROPERLY MADE GROUND OR EARTH CONNECTIONS 5 DO NOT ATTEMPT TO CHANGE THE TAP SETTINGS WHILE THE TRANSFORMER IS ENERGIZED...

Страница 6: ...due stress on the terminals Conductors should be securely fastened in place and adequately supported with allowances for expansion and contraction FINAL INSPECTION PRIOR TO ENERGIZATION After the Package Compact Substation has been found to be in good condition and the protective equipment is operational the substation may be connected to the network However it is recommended that the transformer ...

Страница 7: ...awings and previous test records before starting activity Scrutinize maintenance instructions given for the equipment to be maintained Maintenance information is given in the Operation and Maintenance Manual for each type of equipment The main dangers of such process are Inaccessible lubrication points greased for life cannot be lubricated and may seize up Areas not lubricated may be subject to co...

Страница 8: ...estigated for possible contamination on the surfaces NOTE For individual circuit protective device s resistance readings load and line conductors should be disconnected If not disconnected the test measurements will also include the characteristics of the attached circuits A temperature and humidity reading are recommended and recorded during the testing period Insulation resistivity is markedly e...

Страница 9: ...ntenance measures can be carried out which can not normally be performed during operation Before starting maintenance work the transformer has to be disconnected from the network and earthed or grounded When the disconnector has been opened one has to see to that they stay open and before grounding or earthing one has to test that they are voltage free i e with a voltage tester Inspection of oil l...

Страница 10: ...ten of milliamperes With the same voltage reading the current taken by other phases can be measured The excitation currents of different phases should be approximately the same magnitude In a damage phase the current can rise to tens of amperes thus the regulating transformer has to be protected by a suitable fuse 4 DC resistance of windings A satisfactory large DC source and an accurate resistanc...

Страница 11: ...energy may be different for different fuse types as well as the selection tables and protection characteristics It is compulsory to use the same type of fuse links in all phases type rated current The disconnector cannot be closed before the fuse links are changed Note According to IEC Publication 282 1 all 3 fuse links should be replaced even if only 1 or 2 of the fuse links in the three phase sy...

Страница 12: ...uring periodic checks established the best fixed periods for maintenance work It is also advisable to refer to the following rules The circuit breakers that operate rarely or which remain closed or open for long periods must be activated once in a while to prevent a tendency to jam which might cause reductions in the closing or opening speed During service circuit breaker must be visually check fr...

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