IDIS. Medium-Voltage Components. Intelligent Density Information System. Operation - Replacement Technical Instruction

Transcription

1 Medium-Voltage Components IDIS Intelligent Density Information System Operation - Replacement Technical Instruction No. AGS Edition 08/0

2 Manufacturer: Schneider Electric Sachsenwerk GmbH Rathenaustrasse D Regensburg Germany ( +49 (0) (0) Service: Schneider Electric Sachsenwerk GmbH Rathenaustrasse D Regensburg Germany ( +49 (0) (0)

3 Contents Remarks on this manual...4 Purpose and target group... 4 Reference documents... 4 Terms and symbols used... 5 Abbreviations used... 5 Any questions or suggestions?... 5 Safety provisions...6 Design and function...7. Positions of gas density switches and of the display unit in panels IDIS Monitoring System in GHA Switchgear Panels Technical data Use in line with the intended purpose Disposal after the end of the service life Gas density switches... 4 IDIS display unit Description Display ranges Function test (on commissioning) Malfunction signals List of remote monitoring signals Replacement Safety provisions Replacement of the IDIS display unit Replace gas density switch Replacement devices and accessories Auxiliary products Gas density switch Protective cap for gas connector socket Versions of the display unit... AGS Edition 08/0 3

4 Remarks on this manual As our products are subject to continuous further development, we reserve the right to make changes regarding standards, illustrations and technical data. All dimensions specified in this manual are in millimeters. Purpose and target group This Technical Manual describes operation and replacement of the Intelligent Density Information System IDIS. It is exclusively intended for use by the manufacturer's staff or by persons certified for the IDIS system (training certificate). The work described in this manual may only be performed by specialist electricians with proven experience in conjunction with the GHA series (training certificate) all relevant safety provisions. the IDIS system This Technical Manual is an integral part of the product and must be stored so that it is readily accessible at all times for and can be used by persons who are to work on the switchgear. If the switchgear is relocated to another site, this Technical Manual must be passed on to the new operators along with the unit. This Technical Manual cannot describe every imaginable individual case or every customer-specific version of the product. For information which is not included in this manual, please contact the manufacturer. Reference documents The following additional documents must be observed: purchase agreement containing the stipulations on the specific equipment of the switchgear and the legal details the contract specific switchgearcircuit diagrams / documentation assembly Instructions for GHA switchgear operating Instructions for GHA switchgear GHA switchgear system configuration 4 AGS Edition 08/0

5 Remarks on this manual Terms and symbols used This manual uses certain terms and symbols. They warn about dangers or provide important information which must be complied with at all costs so as to avoid danger and damage: "Danger!" This danger symbol warns about dangerous electrical voltage. Contact with voltage may result in fatal injury! "Warning!" This danger symbol warns about the risk of injury. Please comply with all the provisions identified by this symbol in order to avoid death or serious injury. "Important:" This instruction symbol is used for information which is important to avoid material damage. Abbreviations used U r : I r : Rated voltage Rated current Any questions or suggestions? Do you have any questions or suggestions regarding this manual, or do you require further information? We always strive to provide you with the best-possible information for optimum, safe use of our products. Thus, do not hesitate to contact us if you have any recommendations, amendments or proposals for improvement. AGS Edition 08/0 5

6 Safety provisions The work described in this manual may only be performed by specialist electricians with proven experience in conjunction with the IDIS system and the applicable safety provisions. Read the instructions carefully before you work on the switchgear. Applicable standards and regulations: Metal-enclosed AC switchgear for rated voltages > kv up to including 5 kv: IEC Use and handling of sulphur hexafluoride (SF 6 ) in high-voltage switchgear: IEC The locally applicable accident prevention, operating and work instructions must be complied with. Installation: IEC 6936-/HD 637 S Operation of electrical equipment: EN 500- The national standards applicable in the country where the equipment is to be installed must be complied with. Before performing work on the panels, it is essential that you comply with the following instructions: Warning! Risk of injury from movable parts in mechanical drives. Before performing maintenance work, isolate the system from the supply voltage, release the circuit-breaker s energy storing device by OFF ON OFF operation switch ON via the make-proof earthing switch. Warning! After the removal of covers from a switchgear, operator safety regarding internal arcs may be reduced unless the switchgear is isolated from the power supply. Optimum operator safety is only ensured if the switchgear is completely isolated from the power supply and earthed for assembly work. Behaviour in case of incidents or accidents Whenever the IDIS system issues a malfunction signal as described in Chapter 4, its reason must be ascertained on site immediately. During a malfunction signal, the insulating gas density is not monitored, and thus, the dielectric strength of the high-voltage components concerned is not monitored either. The behaviour in case of malfunctions and accidents is also described in the operating manual for the series GHA. Make sure that first-aid measures are taken in case of injury to persons. Comply with the locally applicable accident and safety provisions. 6 AGS Edition 08/0

7 Design and function. Positions of gas density switches and of the display unit in panels Examples for GHA switchgear panels with single busbar gas density switches display unit The IDIS system consists of one up to max. three gas density switches and one display unit. SS LS L R SS re. SS li. LS Fig. Branch-circuit panel Fig. Bus section coupler Double busbar gas density switches display unit SS SS LS SS SS LS Definition for gas density switches in a panel with double busbar: Busbar = rear busbar Busbar = upper busbar Fig. 3 Branch-circuit panel Fig. 4 Bus coupler AGS Edition 08/0 7

8 Design and function SS re. SS li. LS SS re. SS li. LS Fig. 5 Bus section coupler of the upper busbar Fig. 6 Bus section coupler of the rear busbar Busbar attachments for double busbar gas density switches display unit MB TB MB TB Definition for gas density switches in a panel with double busbar: Busbar = rear busbar Busbar = upper busbar Fig. 7 Busbar earthing switch Fig. 8 Double busbar metering panel with disconnectable busbar voltage transformers 8 AGS Edition 08/0

9 Design and function. IDIS Monitoring System in GHA Switchgear Panels Important: The rated pressure and the pick-up values of the IDIS system are indicated on the switchgear panel's nameplate and its Operating Manual. Busbar gas compartments Electrical bushing (gas-tight) Gas connector socket Gas density switch Circuit breaker gas compartments Pressure relief port IDIS display unit Fig. 9 GHA switchgear with single busbar Busbar gas compartments (= rear busbar) Busbar gas compartments (= upper busbar) Electrical bushing (gas-tight) Gas connector socket Gas density switch Circuit breaker gas compartments Pressure relief port IDIS display unit Fig. 0 GHA switchgear with double busbar AGS Edition 08/0 9

10 Design and function.3 Technical data Ambient conditions Operating temperature range Temperature range for storage and transport -5 C up to +55 C -40 C up to +70 C Auxiliary supply/ power consumption Auxiliary voltage max. power consumption 4 V DC, admissible fluctuation range ± 0%, with polarity-reversal protection 50 ma Contact data of signalling relays Rated power (resistive) max. switching capacity max. switching voltage max. DC load (resistive) 5 A / 50 V AC 5 A / 30 V DC 50 VA / 50 W 50 V AC / 0 V DC 0,4 A / 0 V DC Requirements/standards acc. to IEC , test Alternating Voltage value kv Insulation strength acc. to IEC , class 3, Impulse voltage test value 5 kv EMC requirements acc. to IEC 6000 Mechanical requirements Resistance to earthquakes in accordance with EN 6055 Operating conditions normal service conditions in acc. to IEC67-, temperature class "minus 5 C indoor".4 Use in line with the intended purpose The Intelligent Gas Density Information System IDIS is exclusively intended to monitor gas-insulated medium-voltage switchgear units. It may only be used in the scope of the specified standards and the switchgear-specific technical data. Any other utilization constitutes improper use and may result in dangers and damage. Disclaimer of liability The manufacturer shall not be held responsible for damage which occurs if instructions in this technical manual are not complied with, the IDIS system is not operated appropriately (see above), the IDIS system is assembled, connected or operated improperly, accessories or spare parts are used which have not been approved by the manufacturer, the IDIS system is converted without the manufacturer's approval, or if inadmissible parts are attached..5 Disposal after the end of the service life The disposal of the components of the IDIS system is described in the scope of the disposal of the switchgear panel pertaining to it. Disposal at the end of the service life is performed as a service by the Service Center at the manufacturer's which is subject to a fee. 0 AGS Edition 08/0

11 3 Gas density switches The gas density switches are screwfastened to the gas connector sockets of the appropriate cladded compartments (Fig. ). They can be replaced at any time. The gas density switches are temperature-compensated. If the insulating gas temperature changes, the output value remains constant, as a temperature change does not change the insulating gas density. The gas density switch features two NO contacts. The NO contacts define two response thresholds which transmit three differentiated messages to the IDIS display unit, depending on the switch condition (Fig. ). 3 4 Fig. Gas density switch Connection cable to display unit 3 Swivel nut 4 Gas connector socket Gas-filled compartments 3 P P P3 Remote signalling. warning level. warning level Gas density switches IDIS display unit Fig. IDIS schematic diagram AGS Edition 08/0

12 4 IDIS display unit 4. Description The temperature-compensated gas density information system IDIS represents the signals of the max. 3 gas density switches connected in terms of colour-coded LEDs. Remote signalling relays on the back enable signals to be transmitted to a remote control or I&C system. The display unit evaluates the signals of each gas density switch and indicates the insulating gas states "ready to operate", " warning level" and ". warning level" via three LED per channel. A status change must be present constantly for at least three seconds before the input is evaluated (signal debounce) Fig. 3 IDIS display unit, showing for example a circuit-breaker panel with single busbar; variants see chapter 6.4, page Nameplate Schematic diagram 3 Colour LED ready for operation 4 Colour LED warning level 5 Colour LED warning level 6 Monitoring of busbar compartment 7 non-activated channel 8 Monitoring of circuit-breaker compartment 9 Function test push-button AGS Edition 08/0

13 4 IDIS display unit 4. Display ranges The table below shows the three possible insulating gas states which can be represented by the indicator unit for each active channel. The data is referred to a compartment monitored by a gas density switch. Warning! For reasons of operator safety, covers must not be removed during operation. Refer to the safety provisions in section. Important: The rated pressure and the. warning level of the IDIS system are indicated on the switchgear panel's nameplate. Always comply with the operating manual of the switchgear. Messages of the IDIS display unit per channel / actions to be taken in case of a loss of density (within the compartment) For use and handling of sulphur hexafluoride (SF 6 ) in high-voltage switchgear, IEC must be complied with. LED display grün State ready for operation State of remote signalling relays Both remote signalling relays picked up Actions to be taken gelb rot. warning level in case of pressure drop. warning level in case of pressure drop Remote signalling relay " st warning level" dropped, " nd warning level" remains pickedup Remote signalling relay " nd warning level" dropped, " st warning level" is picked up again Contact Service-Center Replenish insulating gas and watch the system to find out if the. warning level reoccurs Schedule a disconnection of the compartment in question Contact Service-Center Isolate the corresponding compartment from power supply Warning! Insulating gas may only be refilled by trained specialist staff. Comply with the valid safety instructions and data sheets. AGS Edition 08/0 3

14 4 IDIS display unit 4.3 Function test (on commissioning) Warning! High voltage must not be connected until the function test has been performed successfully, as the the insulating gas monitoring is not ensured. Actions to be taken in case of malfunctions:. Use a pointed object (e.g. pen) to press the push-button in the opening on the front labelled "" (Fig. 4.5). Now all LEDs of the active channels must go on. Both remote signalling relays must drop out at the same time and issue the. warning level and the. warning level.. Release the button; the IDIS system returns to its normal operation.. Do not commission the panel!. Replace display unit (see section 5). < << Push-button for function test Fig. 4 Function test: All active LED must go on and the remote signalling relays issue pre-alarm and main alarm. 4.4 Malfunction signals Malfunction signals have priority over loss-of-density signals if both are present simultaneously. Specificities for remote monitoring: Warning! As long as malfunction signals are active, high voltage must not be connected on commissioning due to the fact that there is no insulating gas monitoring. The insulating gas monitoring is not ensured while a malfunction signal is on. Important: During all malfunction signals of the IDIS system, both remote signalling relays at the display unit are, on principle, in drop-out status and issue the signals pre-alarm and main alarm at the same time. Action: The reason for the malfunction signal must be clarified immediately on site based on the LEDs. Warning! Refer to the safety provisions in section. 4 AGS Edition 08/0

15 4 IDIS display unit Display unit: The IDIS system performs a selfdiagnosis at intervals of 5 seconds. If a fault is detected the yellow and the red LEDs on all active channels are lit (Fig. 5). Both remote signalling relays drop out. Action: Replace display unit (see section 5). < << Line monitoring to the gas density switches Due to the closed-circuit principle, the lines to the gas density switches are monitored. If a connection cable is interrupted, the yellow and the red LEDs of the channel in question flash (Fig. 4.3). Both remote signalling relays drop out. (Fig. 6). Actions:. Check the connection cable / plug-in contacts to the gas density switch (see section 5).. If necessary, check the gas density switch and the gas density of the compartment in question (Contact the manufacturer). Fig. 5 All active yellow and red LEDs are lit: System alarm < << Fig. 6 In the lower channel, the yellow and the red LED flash: Check the connection cable for the appropriate gas density switch - in this case the circuit-breaker compartment. Supply voltage not available As long as there is no supply voltage present, all LEDs on the display unit are inactive (Fig. 7). Both remote signalling relays drop out. Actions:. Apply supply voltage.. Check contacts and supply cable. Inform the manufacturer. < << Fig. 7 None of the LEDs is lit. The power supplyis not available. AGS Edition 08/0 5

16 4 IDIS display unit 4.5 List of remote monitoring signals A total of five different states of the IDIS system are retransmitted via the two remote signalling contacts. Important: Whenever the IDIS system issues an alarm and malfunction signal, its reason must be ascertained on site immediately. Remote signals from the IDIS system State of the two remote signalling relays Actions Operative Both relays are picked up Pre-alarm (Insulating gas density) Main alarm (Insulating gas density) Relay "pre-alarm" dropped out ("Main alarm" remains picked up) Relay "Main alarm" is dropped out and "pre-alarm" picks up again. see chapter 4., page 3 see chapter 4., page 3 Malfunction signal Both relays are dropped out see chapter 4.4, page 4 Function test Both relays must drop out see chapter 4.4, page 4 6 AGS Edition 08/0

17 5 Replacement 5. Safety provisions IDIS units may only be replaced by specialist electricians with proven experience in conjunction with the IDIS system and the applicable safety provisions. Danger! Prior to performing work in the area of the panel drives, switch the supply voltage OFF and make sure to prevent reclosure. Warning! Risk of injuries while working in the area of the drives. Before commencing work, release the circuit-breaker s energy storing device by performing the sequence of operations OFF-ON-OFF. Warning! Loss of insulating gas causes a risk of internal faults within the compartment, as there is no insulation strength. Do not open the gas tanks! Warning! After the removal of covers from switchgear, operator safety regarding internal faults may be impaired unless the switchgear is isolated from the power supply. Optimum operator safety is only ensured if the switchgear is completely disconnected from the power supply and earthed during assembly. These replacement instructions describe exclusively the disassembly and assembly of the gas density switch and the display unit. To have access to the devices, covers may have to be removed or dismounted, depending on the panel types and variant. AGS Edition 08/0 7

18 5 Replacement 5. Replacement of the IDIS display unit Fig. 8 Assignment of rear socket contacts on the display unit. Shown: double busbar feeder panel (Exception: bus section coupler) Remote signalling contacts Power supply terminal Connectors for gas density switch: 3 Busbar compartment 4 Busbar compartment 5 Circuit-breaker compartment Removal. The operating panel in which the IDIS display unit has been mounted should be removed depending on the ease of access. Observe the assembly instructions of the switchgear panel!. Remove the connectors for remote signalling, power supply and the gas density switch. 3. Press both retaining clips outwards and remove display unit to the rear (Fig. 9). Fig. 9 Press retaining clips to the side () and pull IDIS device out () Assembly. Place both retaining clips in the sheet-metal cut-out and press them outwards slightly. Push the display unit in the sheet-metal cut-out from the rear, until the retaining clips are engaged in the display unit (Fig. 0).. Reconnect the connector for remote signalling, power supply and the gas density switch according to the socket contact assignment (Fig. 8, page 8). 3. Check the display unit for proper working order (see chapter 4.3). 4. Remount the covers which were removed previously. Fig. 0 Press clip outwards () and push IDIS device inwards until it locks in () 8 AGS Edition 08/0

19 5 Replacement 5.3 Replace gas density switch Warning! Risk of leakage: When removing and remounting the gas density switch, the gas connector socket must be held up (locked; wrench size 3).. Remove the three-pole connector of the gas density switch from the display unit and pull connection cable back to the gas density switch.. Release swivel nut (wrench size 3) between the gas density switch and the gas connector socket. 3. Pull the gas density switch off (Fig. ). At the same time, the valve of the gas connector socket is closed automatically. 4. Should no replacement unit be available during disassembly, the gas connector socket must be closed by means of a cap (Fig. ) 3 4 Fig. Gas density switch Connection cable to display unit 3 Swivel nut 4 Gas connector socket Fig. Cap Ref.-No.: AGS C Assembly. Remove cap (Fig. ) from the gas connector socket.. Coat seal and sealing surfaces (required auxiliary products, see Chapter 6., page 0). Sealing surfaces, seals (cord sealing rings) and grooves for cord sealing rings must be cleaned with particular care using a cleaning agent and a lint-free cloth. Immediately afterwards, apply SF6 multi-purpose lubricant using a nylon brush or a leather cloth which is exclusively reserved for this application; then keep the brush or the leather cloth in a place where it is protected against soiling. Important: Sealing surfaces coated with SF 6 multi-purpose lubricant must no longer be touched. Any contamination may impair function (leakage). 3. Push gas density switch into the gas connector socket and secure it using the swivel nut (Fig. 5.4). Tightening torque: Nm 4. Route connecting cable to the IDIS display unit and - if necessary - fasten it to the panel; reel up excessive cable lengths. 5. Connect the three-pole connector of the gas density switch to the appropriate socket contact. 6. Perform a functional check on the display unit and check malfunction signals (see Chapter 4.3 and 4.4). 7. Remount the panel shutters which have been removed previously. AGS Edition 08/0 9

20 6 Replacement devices and accessories 6. Auxiliary products Warning! Risk of injury if these products are handled improperly. Observe the safety data sheets of the manufacturers of the auxiliary products. Only the following auxiliary products may be used, which can be purchased from the manufacturer. The use of other auxiliary products is not admissible. Designation Ref. No. SF 6 multi-purpose lubricant MS, 0.75 kg can ST Detergent (ethanol, type 64) S Please enquire at the manufacturer s regarding the available packing unit. 6. Gas density switch Rated pressure Ref. No. p re 0,03 MPa AGS ,05 MPa AGS ,06 MPa AGS The rated pressure of the panel is indicated on its nameplate. The specified pressure data refer to +0 C and an atmospheric pressure of 0.3 kpa absolute. Fig. 3 Gas density switch with signal line 6.3 Protective cap for gas connector socket Ref. No.: AG C05690 Fig. 4 Cap with packing ring 0 AGS Edition 08/0

21 6 Replacement devices and accessories 6.4 Versions of the display unit Depending on the design of the switchgear panels, panel-specific IDIS display units are used. The design in question depends on the panel configuration and can be identified by means of the schematic diagram on the IDIS display unit. Important: Other customized busbar designations must be taken into consideration analogously. IDIS display units for single busbar switchgear Single busbar "BB" = busbar compartment "CB" = circuit-breaker compartment Feeder panel with circuit-breaker Ref.-No.: AGS BB CB Busbar riser panel Ref.-No.: AGS BB CB Panel, only with busbar Ref.-No.: AGS BB Bus section coupler Ref.-No.: AGS BB r. BB l. CB AGS Edition 08/0

22 LS IDIS 6 Replacement devices and accessories IDIS display units for double busbar switchgear Double busbar "BB" = busbar (rear busbar compartment) "BB" = busbar (upper busbar compartment) "CB" = circuit-breaker compartment Feeder panel with circuit-breaker Ref.-No.: AGS BB BB CB Busbar riser panel Ref.-No.: AGS BB BB CB Panel, only with busbars Ref.-No.: AGS BB BB Bus coupler Ref.-No.: AGS BB BB CB Bus section coupler in a panel width ( display units per panel) Busbar with bus section coupler Ref. no.: AGS Display units are identical for bus section couplers of the upper and rear busbar. Regarding assignment of the monitored compartments, observe the panel s mimic diagram. Continuous busbar Ref. no.: AGS BB r. BB l. CB Special model for ANSI version ( display units per panel) Compartment for circuit-breaker (CS) cable connection (CC) Ref. no.: AGS CS CC Compartment for main busbar (MB) transfer busbar (TB) Ref. no.: AGS MB TB AGS Edition 08/0

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24 Schneider Electric 0 All rights reserved to this technical manual. Reproduction and making available of this technical manual, or extracts, to third parties are prohibited. Only integral reproduction of this technical manual is permitted with the written permission from Schneider Electric. Electronic copies in e.g. PDF-format or scanned version have the status for information only. The only valid version of this technical manual is always enclosed directly to the product in question by the factory. Schneider Electric 35, rue Joseph Monier CS Rueil-Malmaison Cedex, France RCS Nanterre Capital social AGS /0 As our products are subject to continuous development, we reserve the right to make changes regarding the standards, illustrations and technical data described in this Technical Manual. For any requests, please contact the address given below. Schneider Electric Sachsenwerk GmbH Rathenaustrasse D Regensburg, Germany ( +49 (0) (0)