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RITZ ICO 245 User Manual Download Page 35

Fault

Possible cause

Remedy

Incorrect measurement results
due to excessive heating of the
transformer

Operation outside the specifica‐
tion limits

Checking the technical specifica‐
tions limits,

Ò

Rating plate.

Reduced insulation due to exces‐
sive heating of the transformer

Increased contact resistances at
the secondary terminals

3.3 Dismantling

1.

Disconnect the transformer and the surrounding equipment from
the power supply, see

Chapter 2.6 Shutdown on page 23.

2.

Interrupt the primary connection by loosening the screw fitting
on the primary terminal of the transformer.

3.

Release the secondary connections as follows:
» Undo the screw connection of the terminal box cover and open

the terminal box.

» Loosen the connection terminals and remove the secondary

cables.

» Loosen the cable glands from the underside of the terminal

box .

4.

Release the separate earthing connection on the earthing screws.

5.

Release the screw fittings at the base of the transformer.

6.

Protect the composite insulator from damage and soiling.

7.

Transport the transformer to the new destination,

3.4.1 Transporting the device on page 33.

ICO 72,5...245

USER MANUAL
When to interrupt the running operation

32/47

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Summary of Contents for ICO 245

Page 1: ...sk of electric shock during commissioning STORAGE Store the transformer at an ambient temperature between 25 C and 40 C The transformer must preferably be stored in a ver tical position and screwed to the ground If you store the transformer in a lying position the device must stand upright for at least 24 hours before it can be put into operation Secure the intrument transformer against slipping t...

Page 2: ...he terminal box closed Ensure that unauthorised persons and children cannot access the instrument transformer You must not operate the instrument transformer in open condition Ò Installation on page 2 Operate the instrument transformer only with an intact composite insulator Otherwise you risk oil leaking greatly increased partial discharges and an explosion of the instrument transformer SHUTDOWN ...

Page 3: ...sformer is used We accept no liability for incorrect installation Manufacturer RITZ Instrument Transformers GmbH Wandsbeker Zollstraße 92 98 22041 Hamburg Germany GB ICO High voltage current transformer for outdoor use Page 3 3 Version 09 03 2020 GERMANY HAMBURG WIRGES KIRCHAICH DRESDEN AUSTRIA MARCHTRENK HUNGARY KECSKEMÉT CHINA SHANGHAI USA HARTWELL ...

Page 4: ...ICO 72 5 245 High voltage current transformer User manual HB ICO Version 01 Stand 01 06 2021 GERMANY HAMBURG WIRGES KIRCHAICH DRESDEN AUSTRIA MARCHTRENK HUNGARY KECSKEMÉT CHINA SHANGHAI USA HARTWELL GB ...

Page 5: ...nts trademarks or other proprietary rights which can be linked with specific terms or entries The absence of these references however does not imply that the relevant terms or entries are free from these rights Subject to technical modifications Manufacturer RITZ Instrument Transformers GmbH Wandsbeker Zollstraße 92 98 22041 Hamburg Germany ICO 72 5 245 USER MANUAL 2 47 ...

Page 6: ...do in the event of damage 10 1 4 Special equipment 11 1 4 1 Primary reconnection 11 1 4 2 Secondary tapping 11 2 HOW TO USE THIS DEVICE AS INTENDED 13 2 1 Important general safety instructions 13 2 1 1 Working disconnected from voltage 13 2 1 2 Technically flawless condition of the transformer 13 2 1 3 Deviating operating conditions 13 2 1 4 Structural changes 13 2 2 Unpacking 14 2 3 Installation ...

Page 7: ... CAN HELP 38 4 1 Repairs 38 4 2 Spare parts 38 4 3 Other queries 38 5 TECHNICAL DATA 39 5 1 Technical data 39 5 2 Environmental conditions 40 5 3 Rating plate 41 5 4 Circuit diagram 42 5 5 Technical illustration 43 6 SYMBOLS AND ABBREVIATIONS 44 6 1 Symbols and abbreviations 44 6 2 Safety labels 46 7 CONTACT CUSTOMER SERVICE 47 ICO 72 5 245 USER MANUAL Table of contents 4 47 ...

Page 8: ...to cope with dif ferent degrees of pollution and load classes The standard model is already designed for 31 mm kV and load class 2 Corrosion resistant components a stainless steel expansion cell and chambered O ring seals ensure that it is maintenance free over the entire product life cycle High voltage windings with double enamel coated magnet wire ensure insulation between the windings To change...

Page 9: ...andards including IEEE ANSI CSA IEC as well as all customer requirements 1 1 2 What is the purpose of the device The task of the current transformer is to transfer currents proportion ally and phase true such that they are detectable for measuring equip ment at low potential The current transformer translates high currents into lower directly measurable currents which are adapted to the downstream...

Page 10: ...he practical section shows you how to connect the device and when to disconnect it from the mains The fourth section deals with questions about repair and service Some of the information and illustrations in this manual may differ from the features of your device This includes details of special equipment abstractions and example illustrations The safety instructions are differentiated according t...

Page 11: ... this user manual the applicable versions of the per tinent national laws regulations and provisions must be observed 1 3 For your safety 1 3 1 When is it dangerous to use the device Any applications of the transformer not described in this user manual could result in serious personal injury or even death and cause serious damage to property Any other or additional use as well as use outside the p...

Page 12: ...operator is responsible for defining the responsibilities and monitoring of the personnel The operator must ensure that everyone who works on the transformer has read and understood this user manual inform everyone who works on the transformer of the applicable regulations regarding work safety and accident prevention provide everyone who works on the transformer with the necessary protective equi...

Page 13: ...operty caused either wholly or in part by untrained persons or by non compliance with the regula tions regarding work safety and accident prevention 1 3 5 What should you do in the event of damage WARNING Damage to the device Damage can impair the functionality and operational safety of the transformer This may cause personal injury Remove the damaged transformer from service immediately If necess...

Page 14: ...ondary internal resistance values remain unchanged with primary side reconnection Circuit diagram for the primary reconnection If the transformer is reconnectable on the primary side the asso ciated circuit diagram is located near to the primary conductor on the head housing 1 4 2 Secondary tapping To change or vary the transformation ratio of a transformer not only the start and end of a winding ...

Page 15: ...onnection of the secondary technology at the terminals S1 S2 low primary rated current small ratio S1 S3 high primary rated current large ratio ICO 72 5 245 USER MANUAL Read first then take action 12 47 ...

Page 16: ...nd improper handling or maintenance can impair the operational safety of the transformer There is a risk of accidents in which people could be injured è Only perform work on the undamaged transformer in accord ance with these instructions 2 1 3 Deviating operating conditions Deviating operating conditions can impair the functionality and opera tional safety of the transformer This may cause person...

Page 17: ...ings crane Observe the instructions for lifting the transformer under Ò Transporting and lifting in a horizontal position chap 3 4 1 Check the following based on the dimensional drawing Is the device complete and undamaged Be careful of sharp edges You could be injured NOTICE If there is external damage to the transformer personal and operational safety are at risk Ò Chapter 1 3 5 What should you ...

Page 18: ...n Do not make any structural changes to the transformer Ò Chapter 2 1 4 Struc tural changes on page 13 Ensure that the installation surface is even Level out any unevenness between the transformer and the installation surface The position of the transformer during installation is upright Secure the transformer to the foundation For fixing dimen sions please refer to the Ò Dimensional drawing Depen...

Page 19: ...Check the oil level using the oil level indicator on the head of the transformer see Fig For further information please refer to Ò Procedure step 7 on page 26 1 Fig 6 Position of the oil level indicator on the ICO type current trans former 1 Oil level indicator è The oil level indicator should be in the green area 4 Prepare the transformer for connection on the primary side Always ensure a conduct...

Page 20: ...the manufacturer e g Penatrox special grease Pfisterer MV CAUTION Safe handling of auxiliary materials Health hazards can arise from the auxiliary materials used depending on their chemical composition It is essential to observe the safety datasheets of the auxiliary materials and the instructions and regulations they contain 5 Establish the primary connection at the transformer Screw the two prim...

Page 21: ...sses due to high contact resistances The transformer can be thermally overloaded by primary conduc tors whose cross sections or materials are not enough electrically load bearing Only use primary conductors whose cross sections are suffi ciently dimensioned to withstand the secondary thermal short time rated current ICO 72 5 245 USER MANUAL How to use this device as intended 18 47 ...

Page 22: ...htening torque Nm Tightening torque lb ft Metric Imperial A2 70 5 6 A2 80 8 8 A2 70 5 6 A2 80 8 8 M6 1 4 5 7 5 3 5 5 5 M8 5 16 15 20 11 15 M10 3 8 30 40 22 30 M12 1 2 50 75 35 55 M16 5 8 120 190 90 140 M20 3 4 180 380 130 280 M24 1 270 570 200 420 1 Fig 9 Earthing bolt holes in the transformer base 1 Boreholes for the earthing bolts Fig 8 Earth the device ICO 72 5 245 USER MANUAL How to use this d...

Page 23: ...onal drawing for detailed information on the number and arrangement of the secondary termi nals 1 Fig 10 Terminal box with secondary terminals 1 Secondary terminals Also the secondary circuit diagram is located in the terminal box There is an aluminium plate on the underside of the terminal box to which cable connections can be attached Observe the required tightening torques see Ò Table on page 1...

Page 24: ...t traces especially in areas with high air pollution An internal metal shield ensures that the surface currents can flow off unhin dered 4 Connect the secondary cables to the secondary terminals M6 in the terminal box of the transformer Fig 10 Ò Tightening torque max 5 Nm DANGER High voltage at open secondary terminal If the secondary windings of the current transformer are operated in open condit...

Page 25: ...l leaks In the event of leaks please contact us the manufacturer Ò Chapter 7 Contact customer service on page 47 5 Have you cleaned and checked the insulator for damage The instructions for cleaning can be found here Ò Chapter 3 1 1 Cleaning the device on page 24 6 Have you completed all the previous points è Switch on the power supply 2 5 Operating WARNING Operation only after correct commissioni...

Page 26: ... and the surrounding equipment from the power supply DANGER High voltage in conductive components There is a danger to life through electric shock Observe the 5 safety rules of electrical engineering Disconnect the source of high voltage Safeguard against reconnection Ensure no voltage is present Earth Cover or block off adjacent live parts For your safety earth the secondary circuit of the transf...

Page 27: ...use auxiliary materials approved by the manufacturer How often the surface of the transformer should be cleaned depends on the degree of pollution Pollution level Measures Light to medium pollution under normal operating conditions The surface of the transformer should be cleaned annually Heavy pollution e g in coastal loca tions or areas with high air pollution The surface of the transformer shou...

Page 28: ...lution neutral detergent dis solved in water Use a cotton cloth for this purpose Rinse the surfaces with clear water afterwards 3 If using a high pressure cleaner take care to avoid causing any damage Only use equipment with a maximum nozzle pressure of 35 bar for this purpose è In this case the distance between the nozzle and the insulator must be at least 3 m and the water jet must not be applie...

Page 29: ... in the insulator as well as severe damage to the insulator shields necessitate replacing the transformer 4 Inspect the terminal box for cracks damage and leaks 5 Inspect the condition and fit of the primary and secondary terminals 6 Inspect possible covers and seals for cracks damage and leaks 7 Check the oil level using the oil level indicator on the head of the transformer You can see here how ...

Page 30: ...t abnormally high pressure and does not operate correctly Fig 15 The oil level indicator is in the lower red area Ò The transformer is operating at abnormally low pressure and does not operate correctly The transformer requires no maintenance in relation to oil over the entire product life cycle Oil sampling ICO 72 5 245 USER MANUAL When to interrupt the running operation 27 47 ...

Page 31: ...aused damage to the transformer or if the trans former has malfunctioned If it is necessary to take an oil sample you can remove the oil via the oil drain screw The oil drain screw is located on the base of the trans former 1 Fig 16 Oil drain screw on the transformer base 1 Oil drain screw ICO 72 5 245 USER MANUAL When to interrupt the running operation 28 47 ...

Page 32: ... three complete rotations è Oil will now flow and you can take the sample 5 When you have drawn sufficient oil screw the bolt 2 back in together with the oil sampling set 6 Remove the oil sampling set 7 Tighten the bolt 2 with the torque spanner to 25 Nm 8 Re insert the bolt 1 and tighten it with a torque of 15 Nm 9 Clean any oil residues from the oil drain plug 10 Check the oil drain plug for tig...

Page 33: ...peration of the high voltage transformer There is a risk of injury and explosion Regularly inspect the transformer for damage In the event of a malfunction immediately disconnect the transformer from the mains and contact the customer service 3 2 Troubleshooting In rare cases faults may occur during operation of the device Disconnect the switchgear from the power supply Ò Chapter 2 1 1 Working dis...

Page 34: ...onnecting cables with a larger cross section Ò Chapter 2 3 1 High voltage on the transformer base Incorrect assembly the trans former not earthed Check the connections Ò Chapter 2 3 3 Check the earthing measures Ò Chapter 2 3 2 Limited device function through overheating of the secondary winding Overload the burden is higher than the specified limit power Burden according to the informa tion on th...

Page 35: ...nnection by loosening the screw fitting on the primary terminal of the transformer 3 Release the secondary connections as follows Undo the screw connection of the terminal box cover and open the terminal box Loosen the connection terminals and remove the secondary cables Loosen the cable glands from the underside of the terminal box 4 Release the separate earthing connection on the earthing screws...

Page 36: ...ting the device and transporting it to its destination observe the following instructions Depending on the size of the device and the means of transport available the transformer can be transported vertically or horizon tally The transformer must be transported on vehicles or trailers with air suspension Transportation by rail is not permitted Lift each transformer individually WARNING The transfo...

Page 37: ...on the head housing Use a lifting beam so that the cover of the expansion vessels is not damaged 3 Lift the transformer one at a time Fig 19 Fig 19 ICO type current transformer correct anchoring of the transport aids Transporting and lifting in a vertical position ICO 72 5 245 USER MANUAL When to interrupt the running operation 34 47 ...

Page 38: ...tion plate for transport on the terminal box of the device Place the transformer on the side facing away from the terminal box on the air exclusion flange or the insulator flange not on the cover of the expanding vessel Support the head of the transformer on vibration reducing foam and lash it to the transport frame Screw the base of the transformer to a transport frame 1 Attach the lifting gear t...

Page 39: ... 20 ICO type current transformer transporting and lifting in a horizontal position Fig 21 Standing the ICO type current transformer up ICO 72 5 245 USER MANUAL When to interrupt the running operation 36 47 ...

Page 40: ...ns The transformers must always be stored in a vertical position and bolted to the base on which they are mounted to prevent them from falling over during storms or similar If the transformers have to be stored in a horizontal position they must be stood up vertically at least 24 hours before commis sioning Storage and transport conditions temperature 25 C to 40 C 3 5 Disposal ENVIRONMENT Dispose ...

Page 41: ...d serial number of the device in question These are located on the rating plate which is usually located above the secondary terminals 4 2 Spare parts Spare parts for this device are available on request 4 3 Other queries Do you have any questions about this user manual special equipment or our product range Please do not hesitate to contact us We look for ward to hearing from you Ò Chapter 7 Cont...

Page 42: ...d to the terminal box housing earthing screw M8 M20 Connection type In accordance with standard and or customer requirements see dimensional drawing Secondary connection Terminal box with connection terminals Marathon 16XX SC or Pheonix PT6 Protection class IP 54 Input Primary rated current Upr 5000 A Primary rated voltage UN see rating plate rated frequency 16 2 3 Hz 50 Hz 60 Hz see rating plate ...

Page 43: ...r etc please refer to the rating plate 5 2 Environmental conditions For deviating environmental conditions see Ò Datasheet and Ò Rating plate Observe the following instructions Never use the device in areas at risk of explosion Never use the device near easily flammable materials Installation altitude Up to 1000 m above sea level 1 1This information refers to the standard version of the device Mod...

Page 44: ...d data and the name of the manufacturer Fig 22 Sample rating plate for the ICO current transformer in the 145 kV version Subject to modifications The rating plate is located on the terminal box For the exact posi tion please refer to the Ò Dimensional drawing ICO 72 5 245 USER MANUAL Technical data 41 47 ...

Page 45: ...ores without secondary tapping The connection abbrevia tions correspond to DIN VDE 0414 and EN 61869 3 The secondary ter minals 1S1 and 2S1 are earthed using a earthing lug Fig 23 Sample circuit diagram for a current transformer with two meas uring cores ICO 72 5 245 USER MANUAL Technical data 42 47 ...

Page 46: ...ion Aluminium 2 Transport eyelet 2x Æ40 mm above 4x Æ30 mm below 3 Oil level indicator 4 Terminal box 5 Rating plate 6 Oil drain screw 7 Earth terminal 8 Composite insulator 9 Diameter of the drilled hole 4x Æ18 mm 10 Cover panel for cable gland removable 340 mm x 110 mm ICO 72 5 245 USER MANUAL Technical data 43 47 ...

Page 47: ...dry installation without additional lubricant coefficient of friction μ 0 14 The following symbols have been used in this manual The mandatory sign Earth before use indicates that this device may only be put into operation if it has been earthed beforehand The mandatory sign Disconnect before maintenance or repair is a reminder to only work on this device when the associated electrical system is d...

Page 48: ...ructions for use solicits attention to this user manual The two symbols Wear head protection and Use pro tective gloves are a reminder to wear personal protec tive equipment ICO 72 5 245 USER MANUAL Symbols and abbreviations 45 47 ...

Page 49: ...Fig 25 Always earth the housing Fig 26 Always earth the primary terminal on the earth side Fig 27 Always disconnect the device from the power supply before working on it Fig 28 Never operate the secondary terminals without burden ICO 72 5 245 USER MANUAL Symbols and abbreviations 46 47 ...

Page 50: ...r or get in touch with us directly RITZ Instrument Transformers GmbH Wandsbeker Zollstraße 92 98 D 22041 Hamburg Tel 49 40 511 23 0 Email info ritz international com Internet http www ritz international de ICO 72 5 245 USER MANUAL Contact customer service 47 47 ...

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