INSTALLATION AND OPERATING INSTRUCTIONS
Contents
1. TSG SRF ENCLOSURE SIZE MOUNTING MODEL X1 1 FASTENER W X2 Y2 DIAM ETER TSG SRF132 1 260 477 377 360 TSG SRF163 1 260 471 371 360 TSG SRF1125 1 360 477 377 360 TSG SRF340 1 360 577 1 477 460 TSG SRF363 1 360 577 1 471 460 TSG SRF3125 1 460 721 1 C 025mm 577 610 TSG SRF3200 460 857 1 C 032mm 577 740 TSG SRF3400 610 927 1 GLAND PLATE 727 810 TSG SRF3630 405 1227 1 GLAND PLATE 927 1110 TSG SRF31250 ON 1 GLAND PLATE APPLICATION TSG SRF32000 ON 1 GLAND PLATE APPLICATION Indicative mass only If exact mass is critical for these units Table 4 Physical dimensions of CRITEC TSG SRFs contact ERICO for confotmation x2 w 1 eT x3 ry 25 20 SS Svat D 40mm le B Sr 25mm L QO 20mm le o Q OG 0 o Surge Reduction Filters form an important part of a much larger lightning surge and transient protection philosophy From over 150 years of go T combined aggregate experience in the m field ERICO engineers have developed the Six Point Plan of Protection amp Power Protection device Communications Line Protection device Coaxial Surge Protector CSP Qe Telecommunications Line Protector TLP T Data Line Protector DLP Data Equipment Protector DEP Capture the lightning strike to a known and preferred attachment point Bond all g2. REVERSE CONNECTED SRF INCORRECT CONNECTION PREFERRED CONNECTION ALTERNATIVE CONNECTION PAGE 17 Earthing 6 4 EARTHING The earths for all site equipment should be integrated preferably deploying a single point earthing approach and an equipotential earth plane should be created Integral to this is the elimination of earth loops It is common but incorrect from the point of lightning protec tion for there to be separate earths for vari ous services ie electricity mains telephone computer equipment and other building serv ices For sites where the interconnection of these earths is difficult either for practical or regu latory reasons the use of a Transient Earth Clamp TEC is recommended The TEC behaves as an open circuit under normal operation but under surge conditions it acti vates to effectively clamp individual points together The effectiveness of an SRF is intimately relat ed to the impedance presented by the earth ing system to which it is connected A low impedance route to the earth is required less Single central earthing TSG Series Surge Reduction Filters than 10Q This can be achieved by ensuring that the earth electrode system at the site presents a low surge impedance with respect to the ground Additionally the interconnect ing cabling must be of adequate cross sectional area and be routed to provide as short and direct a path as is practical Ideally t
3. 6 3ft Ibs all locations except as above 10 44 0 Nm 32 0 ft lbs TSG SRF3200 3400 3630 phase input terminals 10 17 0Nm 12 5 ft lbs all locations except as above Table 3 Recommended tightening torques PAGE 16 Installation amp Operating Instructions Output Distribution 6 3 OUTPUT DISTRIBUTION X WRONG As the output of the SRF is considered to be a clean filtered supply it should not be subjected to situations where further tran sients can be introduced The clean supply should not be run external to the facility ie to provide power to an external building or tower lighting From the aspect of transient protection to do so would create possible points of entry for transient energy to the protected zone N D ME Me V RIGHT A similar scenario exists where the output of the SRF is fed to an electrically noisy load Any transients developed by this load may also be fed to other equipment connected to SRF the same supply Es g Electrically noisy equipment should ideally be b supplied from a separate SRF and all cabling aK should be run in isolation to other cables i Figure 13 Isolation of sensitive equipment from noisy Figure 12 Connection of circuits outside the protected Sources zone B WRONG v RIGHT WARNING GHT E
4. The supply PEN conductor is earthed at a number of points throughout the network and generally as close to the consumer s point of entry as possible All exposed conductive parts are connected to the CNE conductor PAGE 9 Identify the Distribution System SOURCE OF ENERGY SOURCE EARTH CONSUMERS INSTALLATIONS VS P MAIN DISTRIBUTION EXPOSED CONDUCTIVE TSG Series Surge Reduction Filters 1 L2 L3 Regulations differ between countries Check compliance with appropriate authorities Figure 5 TT system A system having one point of the source of energy earthed and the exposed conductive parts of the installation connected to independent earthed electrodes SOURCE OF ENERGY SPLIT PHASE SUPPLY GROUND M DISTRIBUTION 4 sap i Regulations differ between countries Check compliance with appropriate authorities PAGE 10 CRITEC TSG SRFs provide protection for equipment on TN C TN S TN C S TT delta or split phase distribution systems when selected installed and earthed in the specified manner The TSG SRFs are designed to be used in distribution systems that provide a separate earth and neutral connection TSG SRFs should not be used in IT distribution systems Refer Figure 7 Specialist application advice should be sought in the protection of delta supplied three phase systems refer Figure 8 before the purchase of the protection equipment Figure 6 Spli
5. recommended that additional protection be installed at the power point of entry Primary shunt protection at the poin of entry should be used to divert the peak surge currents away from the sub circuit This will reduce the risk of cross coupling of transients onto adja cent circuits and will reduce the risk of flashover between the locally grounded chas sis and the earth circuit TSG SRFs on Sub Circuits Figure 16 details the role of point of entry protection in these instances The cables supplying the input to the SRF and the connection to the earthing system will carry a proportion of the surge energy which has been let through the primary point of entry protector Care should be taken therefore in the routing of these cables to ensure that this energy will not couple onto adjacent circuits Figure 16 Operation of primary shunt protection and SRFs on sub circuit LIGHTS AIR CONDITIONING NON CRITICAL LOADS Sub Circuit only protected DEVICE SHUNT LIGHTS CONDITIONING ONLY NON CRITICAL LOADS Sub Circuit protection combined with point of entry shunt protection PAGE 21 TSG SRFs on Sub Circuits In some instances it will be necessary to provide a separate earth electrode for the SRF subject to compliance with relevant wiring regulations particularly where the filter is to be installed on a sub circuit some distance from the existing earth el
6. Termination Size Termination Size Termination Size Method Method Method Single Phase 40A Input Screw Clamp 50mm2 Screw Clamp 50mm2 Output Screw Clamp 35mm2 Screw Clamp 35mm2 Stud 8mm 63A Input Screw Clamp 50mm2 Screw Clamp 50mm2 Stud 8mm Output Screw Clamp 35mm2 Screw Clamp 35mm2 125A nput Stud 8mm Stud 8mm Stud 8mm Output Stud 8mm Stud 8mm Stud 8mm Three Phase 40A nput Screw Clamp 50mm2 Screw Clamp 50mm2 Stud 8mm Output Screw Clamp 35mm2 Screw Clamp 35mm2 63A nput Screw Clamp 50mm2 Screw Clamp 50mm2 Stud 8mm Output Screw Clamp 35mm2 Screw Clamp 35mm2 125A nput Bolt 8mm Bolt 8mm Stud 8mm Output Bolt 8mm Bolt 8mm Stud 8mm 200A nput Bolt 10mm Bolt 10mm Stud 8mm Output Bolt 10mm Bolt 10mm Stud 8mm 400A nput Bolt 10mm Bolt 10mm Stud 8mm Output Bolt 10mm Bolt 10mm Stud 8mm 630A nput 6 x Bolt 10mm 6 x Bolt 10mm Stud 8mm Output 6 x Bolt 10mm 6 x Bolt 10mm Stud 8mm 1250A nput 6 x Bolt 12mm 6 x Bolt 12mm 2 x Stud 8mm Output 6 x Bolt 12mm 6 x Bolt 12mm 2 x Stud 8mm 2000A nput 6 x Bolt 12mm 6 x Bolt 12mm 2 x Stud 8mm Output 6 x Bolt 12mm 6 x Bolt 12mm 2 x Stud 8mm Table 2 Termination details for TSG SRFs Input and output earths on 40 and 63A TSG SRFs use a common earth stud Bolt Screw Recommended Torque Location 6 42Nm 3 1 ft lbs TSG SRF140 163 340 363 input terminals 6 35Nm _ 2 6 ft lbs all locations except as above 8 14 0 10 3 ft lbs TSG SRF1125 3125 phase input terminals 8 85Nm
7. This document details the installation proce dure for our current range of standard TSG _ Field installed Order a TDS SC from your SRFs Non standard units are also manufac nearest ERICO office or distributor When tured to suit specific customer requirements installing the TDS SC please follow the This manual is likely also to be supplied with upgrade installation instructions which are these units The following are details for some provided with the counter of the non standard variations and options available Backplane unit Normally denoted by BP in the model number These units are supplied without the proprietary enclosure and are intended to be mounted in a customer provided switchboard Low Voltage unit This is an alternative voltage version of the standard TSG SRF This unit incorporates primary and secondary surge diverters specifi cally designed for low voltage applications ie 110 120VAC Surge Counter Optional surge counter available for the TSG 18 abad NE im for installation into SRF three phase 125A to 2000A models Benefits of having the surge counter installed are accurate and reliable monitoring of surge activity and predictive maintenance schedul ing Accidental erasure of the surge count is prevented by the use of a non resetable counter display The surge counter can be either factory or field installed The ordering information for this option is detail
8. CRITEC TSG SERIES SURGE REDUCTION FILTERS TSG SRF INSTALLATION AND OPERATING INSTRUCTIONS ERICO Telephone 61 03 6237 3200 Facsimile 61 03 6273 0399 Handbook No HB HBCR 140 CRITEC products are designed and manufactured 1 by ERICO ABN 70 078 495 646 Technopark Dowsings Point Tasmania Australia March 2001 TSG Series Surge Reduction Filters TABLE OF CONTENTS T Introduction i x bem oto iR E a Page 3 2 Warnings i p Rees testy RR TO Re de Page 5 3 Installation lt Page 6 4 Identify the Distribution System Page 8 5 Mounting the Surge Reduction Filter SRF Page 12 6 Optimising Performance Page 13 Geb FUSING ates oe Erates e ect Y Page 13 6 2 Cabling came eR ee Page 14 6 3 Output Distribution Page 17 6 4 Eatthilig nije aate taal QR te Sue cu nos Page 18 6 5 Connection of Alarm Circuits Page 19 6 6 Installation Arrangement for Australian M EN Systems 20 6 7 TSG SRFs on lt 5 Page 21 7 Servicing amp Trouble Shooting Page 23 8 Non Standard Products amp Accessories Page 24 9 Schematic lt Page 25 10 Phys
9. OF ANCHOR BOLT S f MOUNTING BOLT INTO WALL S FOLLOWED BY HANGING THE SRF OVER THE BOLTS TSG Series Surge Reduction Filters To preserve the IP rating TSG SRF units from 40A to 200A must be installed in accor dance with figure 9 and section 6 2 Larger SRF units from 400A to 2000A are ventilated and should be mounted in a dust and moisture free ventilated environment All TSG SRFs should be installed in a dry well ventilated area Avoid sites subject to moisture ingress SRFs are not intended for use in harsh or corrosive environments Where the SRF is to be enclosed in a switch board cubicle models are available without the proprietary enclosure These backplane units are denoted by the model number suffix BP Figure 9 Typical mounting arrangement for wall mounted CRITEC Surge reduction Filters 40 2004 M MOUNTING BOLT METAL WASHER FIBRE WASHER SRF MOUNTING KIT ASSEMBLED IN ORDER SHOWN PAGE12 Installation amp Operating Instructions 6 OPTIMISING PERFORMANCE The protection equipment must be earth ed and installed in accordance with all relevant national electrical and safety standards The term point of entry protec tion is a general descriptive concept of zonal boundary protection as detailed in standards such as IEC 1024 Some local wiring regula tions will allow the protection equipment to be mounted directly at the point of entry while other countries require p
10. WARNINGS PRIOR TO INSTALLATION Ensure that the TSG SRF is of the correct voltage current phasing and frequency and is of the type recommended by the manufactur er for the equipment and power distribu tion system in use DO NOT MEGGER This unit contains over voltage protection components TSG SRFs contain capacitors Disconnect power at least 1 minute prior to removing the escutcheon panel Check voltage prior to working on SPF internals TSG SRFs must be connected to a low impedance earth lt 10Q for correct opera tion TSG SRFs must be installed in accordance with ALL relevant national electrical and safety codes The power supply to the TSG SRF should always be turned off and locked before the escutcheon panel is removed for any purpose Internal circuit breakers do not fully isolate the filter Check all TSG SRF terminals for tight connections Some terminals may become loose during transport Ensure all input and output cabling once installed is tightened to the correct torque settings see table 3 Do not disconnect upstream Earth or Neutral connections supplying the SRF while power is still applied as this may damage the SRF or load No combustible items should be stored within the SRF during operation Do not leave this manual behind the escutcheon panel after applying power to the SRF Retain this manual for future refer ence Failure to heed instructions or warnings m
11. and above for longer tail pulses and determines how much energy the inductor has to store before reaching satura tion and becoming ineffective The combination of TSG and TD technology provides the benefits of high surge capability low let through voltage and considerably reduced dv dt This applies to both surge performance and over voltage withstand from short and long duration high energy surges PAGE 4 TSG Series Surge Reduction Filters TD technology has been developed specifical ly to cater for abnormal over voltage condi tions that may occur on sites with poor volt age regulation or due to wiring or distribu tion faults TD and TSG technologies feature an extremely high over voltage withstand This eliminates heat build up that can occur with standard technologies when the protec tion devices start to clamp on the peak of each abnormal mains cycle Traditional M OV technology is not suitable in applications where sustained over voltage conditions can be experienced The range of CRITEC TSG SRFs with a higher abnormal over voltage withstand are preferred in these environments Installation amp Operating Instructions HAZARDOUS VOLTAGES EXIST WITHIN THE TSG SRF ENCLOSURE THIS UNIT SHOULD BE INSTALLED amp SERVICED ONLY BY QUALIFIED PERSONNEL AND IN ACCORDANCE WITH RELEVANT NATIONAL ELEC TRICAL amp SAFETY CODES ALL INSTRUCTIONS MUST BE FOLLOWED TO ENSURE CORRECT AND SAFE OPERATION OF THE SRF 2
12. ay result in personnel injury equipment damage or ineffective transient protection PAGE 5 Installation Cautions 3 INSTALLATION CAUTIONS CAUTIONS Transient protection devices are usually rated to protect against non repetitive pulses from sources such as direct or induced lightning energy They are not designed to provide protec tion against repeated cyclic anomalies such as those caused by motor speed control notching variable speed controls etc SRFs are not designed to provide protec tion against sustained over voltage condi tions where the supply voltage exceeds for an extended period of time the nomi nal rating of the protection equipment ie continuous over voltages from poorly regu lated generators or distribution systems TSG Series Surge Reduction Filters Smaller power generation equipment does not always conform to the same standards of voltage regulation that is in place for mains power reticulation A large number of smaller or cheaper generators have a voltage waveform that approximates 240Vrms often poorly regulated but more importantly which often contains significant higher order harmonics and may exhibit a peak voltage on each half cycle far in excess of the normal 340V peak Such machines are usually capaci tive excitation induction generators as opposed to synchronous generators The problem is usually increased when the generator is lightly loaded Harmonic voltages may a
13. ectrode In this instance the new electrode should be located as near as possible to the SRF This secondary electrode must be electrically bonded to the existing earthing system via the most direct route possible using flat copper tape and should be buried to an appropriate depth TSG Series Surge Reduction Filters This earthing arrangement is depicted in Figure 17 If a secondary earth cannot be installed or the earth impedance through the sub circuit to the earth is significantly above 100 special care must be taken The risk of flashover between the locally grounded chas sis and the earth circuit may exist Careful attention must be paid to equipoten tial bonding of the protected equipment PHASE CONDUCTORS IN OUT Jc xg c e NEUTRAL TO LOADS BENDS AND LOOPS TO BE AVOIDED WHERE POSSIBLE LOCAL EARTH ELECTRODE EXISTING EARTH ELECTRODE Figure 17 Earthing of an SRF remote from MEN point Subject to compliance with relevant national standards Care is needed to avoid earth loops within protected environment PAGE 22 Installation amp Operating Instructions 7 SERVICING and TROUBLE SHOOTING HAZARDOUS VOLTAGES EXIST WITHIN THE SRF ENCLOSURE THE SRF SHOULD ONLY BE SERVICED BY QUAL IFIED PERSONNEL IN ACCORDANCE WITH RELEVANT NATIONAL ELECTRI CAL amp SAFETY CODES Do not disconnect upstream earth or neutral connections supplying the TSG SRF while power is applied
14. ed below Factory installed Add the following post script to the part number of the product PAGE 24 Installation amp Operating Instructions Schmetic Diagrams 9 SCHEMATIC DIAGRAMS Single Phase SRF Models INPUT LINE OUTPUT LOAD Circuit Breaker or Fuse L1 63A models TSG TSG TD connected Primary C1 Secondary prior to circuit Diverter Diverter breaker TSG Diverter Figure 19 Schematic diagram for Single Phase Filters PAGE 25 Schmetic Diagrams TSG Series Surge Reduction Filters INPUT LINE Circuit Breaker or Fuse Phase 1 O g O 1 Circuit Breaker or Fuse Phase 2 40A 63 models TSG connected prior to circuit breaker TSG Dive Circuit Breaker orFuse Phase 3 40A 63A models TSG connected poe circuit reaker TSG Dive 40A 63A models TSG TSG TD connected Pri C1 Secondary prior to circuit ee Diverter breaker Diverter Primary Primary Three Phase SRF Models OUTPUT LOAD C2 TD Secondary rter Diverter Secondary Diverter rter TSG Diverter Figure 20 Schematic diagram for Three Phase Fi Iters PAGE 26 Installation amp Operating Instructions Physical Dimensions 10 PHYSICAL DIMENSIONS TSG SRF DIMENSIONS
15. he earthing system impedance should be measured using a meter which simulates the typical wave shape of a lightning transient ERICO can provide this service The earth conductor for the SRF should be sized according to local regulations but with a minimum size of 6mm Every attempt should be made to limit the cable length to under 5 metres By selecting the most direct route with the minimum possible number of bends to the earth point or internal earth bar the risk of side flashing and excessive voltage rise across the equipment is reduced Figure 14 depicts the correct earthing concept as described above system Earth bar Coaxial Protector Communications Equipment Rooftop microwave Dataline All power and Protector CE data cables Communications enter or leave the building quipment on the same side to avoid earth loops Figure 14 Preferred approach to equipotential bonding Peripherals earthed to the central earth via equipment 3 Phase LV electricity supply PAGE 18 Installation amp Operating Instructions 6 5 CONNECTION OF ALARM CIRCUITS The TSG SRF secondary surge diverters are continuously monitored and their internal protection status is identified by a two segment LED indicator for each phase Reduction in surge handling capacity activates a set of vol
16. ial applications Standard CRITEC Surge Reduction filters may not be suitable for some applications SEEK SPECIALIST ADVICE BEFORE SELECTING PROTECTION TYPE Regulations differ between countries Check compliance with appropriate authorities PAGE 11 Mounting the Surge Reduction Filter 5 MOUNTING THE SRF Before mounting the SRF refer to Table 4 weights and dimensions on last page of this manual which provides dimensions and unit weights Ensure that appropriate lifting equip ment is used when installing the larger SRFs When installing the SRF consideration should be given to future service needs Ensure that a Clear view of the status indicators is provid ed The SRFs should be mounted away from other electrical apparatus 300mm minimum and in a position that avoids close proximity to combustible materials TSG SRFs of 630A capacity and smaller are designed to be wall mounted Mounting brackets as shown in Figure 9 are supplied Larger units are anchored through holes provided in the rear of the SRF enclosure The cabling and upstream over current protection requirements and all instructions provided in this manual should be taken into consideration before mounting the SRF Q 1 1 Q BRACKET ROTATES 908 TO ALLOW FOR HORIZONTAL POSITIONING SEE PAGE 26 FOR MOUNTING DIMENSIONS SUITABLE WALL N Ae ANCHORING SPECIALLY SHAPED SLOT IN BRACKET ALLOWS FOR PROVIDE M10 4 PARTIAL INSERTION
17. ical Dimensions Page 27 Installation amp Operating Instructions 1 INTRODUCTION The CRITEC Triggered Spark Gap Surge Reduction Filter TSG SRF from ERICO incor porates high energy clamping devices and special filtering circuitry TSG SRFs are installed in series with the circuit usually at the point of entry to the building or structure They are available in single or three phase configurations for load currents from 40A to 2000A per phase The purpose of a TSG SRF is to filter and protect against lightning induced transients The SRF provides a clean filtered supply of electricity to all output connected equipment when installed in accordance with the manu facturers instructions Protection is achieved via a three stage circuit This includes the internal CRITEC Triggered Spark Gap unit as the primary surge diverter a purpose designed low pass filter network Introduction and a secondary Transient Discriminating TD diversion stage to further clamp the transient energy to safe levels This allows the TSG SRF to Provide filtering to the clamped waveform in order to reduce the rate of voltage rise Provide a secondary stage of surge diver sion to protect equipment from transients which may be induced onto the SRF out put cables or be caused by the load itself The use of this combination of technologies has resulted from considerable advances in technology which ha
18. into a circuit which features a total harmonic voltage ratio above 5 With large transients significant energy may be passed by the SRF diverters back to the source or to earth This may under some circumstances cause upstream earth leakage circuit breakers or residual current devices ELCBs amp RCDs to nuisance trip Where possible these devices should be installed after the SRF in order to reduce this possibility Transient protection devices often have minimum requirements for upstream fusing to ensure proper operation See section 6 1 for fusing requirements By pass switches are not recommended to be used with SRFs as they compromise the protection offered The connection of the by pass switch compromises the input to output separation requirement by bring ing the SRF input and output wiring into close proximity at the switch Due to the high reliability of the SRF and provided PAGE 7 Identify the Distribution System 4 IDENTIFY THE DISTRIBUTION SYSTEM A number of different power distribution systems are employed in various countries around the world It is important to identify the distribution system in use prior to installa tion of the SRF and confirm that the SRF is the model recommended by the manufactur er for that distribution system To identify the distribution system in use consult reputable and knowledgeable sources such as The local power supply authority Local electrical e
19. ion SRFs are considered a piece of equipment to be connected to the mains supply They are not intended for use as switchboards distribution boards or other equipment As these devices are classified as electrical equipment AS 3000 Wiring Regulations apply to the installa tion and operation of the units AS 3000 specifies minimum requirements for electrical equipment that is connected to switch boards or distribution boards METERING MAIN DISTRIBUTION SRF NEUTRAL PAGE 20 TSG Series Surge Reduction Filters For a point of entry application in the multiple earth neutral MEN distribution system the SRF equipment should be installed as close as possible after the MEN point and after both the main disconnect switch over current protector and any metering equipment The SRF therefore may not be installed at the physical point of entry of the mains power to the building It must be earthed and installed in accordance with all other applica ble electrical and safety standards As the protection equipment is hardwired the instal lation must be inspected by an appropriately authorized electrical authority official prior to commissioning SUB DISTRIBUTION Figure 15 Typical connection detail for SRF point of entry installation in MEN system Installation amp Operating Instructions 6 7 TSG SRFs ON SUB CIRCUITS Where SRFs are installed to protect equip ment on a particular sub circuit it is strongly
20. ions Max supply Typical supply Minimum Minimum fault transformer circuit fuse size current rating breaker 10kA 500A 100A 40A 15kA 750A 100A 63A 20kA 1000A 125A 80A 43kA 2000A 160A 100A Table 1 The table above summarises the minimum requirements for upstream fusing or circuit breakers necessary to prevent nuisance trip ping or operation of fusing when the TSG primary surge diverter activates PAGE 13 Cabling TSG Series Surge Reduction Filters 6 2 CABLING Cable glands of an appropriate design must be used for all input and output cables to preserve the IP rating of the 40A 200A TSG SRFs The cabling and earth wires connected to the filter input should always be run separately with a minimum clearance of 300mm between them and all other cables or sensi To protect input and output cabling tive equipment as shown in Figure 11 The insulation from sharp edges around input cable and earth wire will carry the tran the cable entry knockouts suitable sient energy while the protected output cable glands or grommets must be cable can be considered to be a clean installed An alternative is to extend filtered supply the cable conduit through the knock out By separating these cables any incoming transients will not be induced from the input cables onto nearby clean cables This clear ance will reduce the possibility of arc over from input to output cables Where cables need t
21. lso be present in distribution systems that do not feature generators This is normally where non Avoid upstream Earth Leakage Circuit Breakers ELCB s or Residual Current Devices RCD s 4 4 4J 4 275Vrms 275 Vrms d 5 NON PREFERRED NON PREFERRED 9 e gt HN Bypass Switches compromise protection Figure 1 Seek specialist advice with the above installations PAGE 6 Installation amp Operating Instructions Installation Cautions linear loads are used such as UPSs recti that spare fuses are on hand for SRFs of fiers switch mode power supplies and 125A and larger it is deemed to be motor speed controls The harmonic volt unnecessary to provide a means by which ages may have peak voltages in excess of to bypass the SRF If these situations the protective clamping voltages causing cannot be avoided contact your local problems such as excessive heat build up ERICO office to assess the possibility of a Because the harmonic waveforms contain special design higher order frequencies capacitive leak age currents may increase to above prescribed limits and shorten the life of the SRF It should be noted that in sites with large harmonic voltage distortion the SRF capacitance may dramatically affect the power factor Seek the manufacturers advice before installing any SRF
22. ngineers Applicable regulatory bodies or standards associations SOURCE OF ENERGY SOURCE EARTH HER a J as CONDUCTIVE Regulations differ between countries Check compliance with appropriate authorities CONSUMERS INSTALLATIONS M a S gt bj 2 di MAIN DISTRIBUTION EC TSG Series Surge Reduction Filters Alternatively confirm the type of distribution system used by personal inspection By visual ly tracing the neutral and earthing conductors from the load equipment or sub distribution point back to the point of entry and perhaps to the supply transformer the type of distri bution system should be identifiable with the aid of the following diagrams figures 2 6 These are prescribed in local regulations and describe the relationship between the source exposed or conductive parts of the installation and earth Amongst these the TN C TN S TN C S and TT systems are most commonly encountered Note that supplies such as those used in industry and mining may often use a different distribution system to that of the local supply authority L1 L2 L3 COMBINED PROTECTIVE AND NEUTRAL CONDUCTOR PEN E C ADDITIONAL SOURCE EARTH Figure 2 TN C system In this system the neutral and protective earth conductor combine in a single conductor throughout All exposed conductive parts are connected to the PEN conductor PAGE 8 Installation amp Opera
23. o run closer together due to space restrictions input and output cables should cross at right angles and not be installed parallel to each other Cabling should be sized in accordance with all relevant wiring stan dards to ensure that the full load current can be safely supplied All cabling or busbars connected to the protection equipment should be securely anchored to prevent undue stress being applied to the input output terminals Input and output terminal requirements are detailed in Table 2 Cable terminal torque requirements are detailed in Table 3 PAGE 14 Installation amp Operating Instructions 40 200A INPUT ON TOP OUTPUT SRF aM Ny OUTPUT ON BOTTOM ESE 200 OUTPUT ON TOP EXPOSED LINE SAFE CLEAN SRF OUTDOOR DIRTY FILTERED PROTECTED EXTERIOR LOAD EQUIPMENT AN neuron BOTTOM Figure 10 Identification of SRF input and output terminals Safe area 300 mm Hazardous area OUTPUT LOAD Right angle SRF crossing OK m 300 mm Keep cables and equipment away from this area Figure 11 Maintaining clearance between input and other cabling PAGE 15 Cabling TSG Series Surge Reduction Filters Filter Rating Maximum Accepted Cable Size Phases s Neutral Earth
24. rotection equipment to be installed after the metering or main circuit isolators or over current protection The following installation points require attention to ensure that optimal protec tion is provided by the protection equip ment This information is provided as a guide only Compliance with local electri cal and safety regulations must be ensured 6 1 FUSING Over current and short circuit protection must be provided in order to protect the SRF and associated wiring if a fault develops The over current protection should be installed in such a manner as to provide a means of isolating the SRF from the mains supply This is an important safety consideration Over current protection provided within the SRF is not designed to act as a means of isolation Over current protection within the SRF does not necessarily isolate all TSG SRF components To allow the TSG the internal primary divert er to operate correctly it is essential that the minimum requirements for upstream fusing or circuit breakers be adhered to rmance Fusing Table 1 summarises the minimum require ments for upstream fusing or circuit breakers required to prevent nuisance tripping or operation of fusing when the TSG activates Upstream fusing and cabling may need to be of higher capacity than the appear ance or size of filter would suggest Fusing of smaller capacity may experience occasional nuisance tripping during surge and transient condit
25. round points together to eliminate ground loops and create an equipotential plane Safely convey this energy to ground Protect incoming AC power feeders Dissipate the energy Protect low voltage into a low impedance data telecommunication grounding system circuits The range of TSG SRFs fulfill some of the requirements of point 5 of the plan For further advice on your electrical Careful consideration of each of the six interdependent disciplines of the Six point protection needs please contact Plan is important to ensure the provision of optimal protection and long term your local ERICO office operational viability The degree of protection required will be determined by the individual situation and the proper application of risk management principles ERICO Copyright 2001 ERICO International Inc
26. t phase distribution systems Installation amp Operating Instructions Identify the Distribution System SOURCE OF ENERGY CONSUMERS SS INSTALLATIONS M A 2 M 2 1 MAIN DISTRIBUTION E SOURCE y 1 EARTH e DISTRIBUTION EE L d SRF 4 l l LOAD _ LOAD _ EQUIPMENT EQUIPMENT 1 gt Loo Loup EXPOSED CONDUCTIVE PARTS SEEK SPECIALIST ADVICE BEFORE SELECTING PROTECTION TYPE Regulations differ between countries Check compliance with appropriate authorities Figure 7 IT system A system having no direct connection between live parts and earth but having all exposed conduc tive parts of the installation connected to independent earthed electrodes CRITEC Surge Reduction Filters should NOT be used in IT systems without specialist advice i The diagrams are provided as a guide to iden SOURCE OF ENERGY tifying and distinguishing the distribution DELTA SUPPLY i system in use Metering over current protec X tion and other details have not been shown As electrical wiring and safety regulations differ from country to country It is important to ensure that the installation complies with all regulations applicable to the location Please seek further assistance if uncertain Figure 8 Delta connected three phase systems Although delta connected systems are IT systems special mention is made due to their frequent use in mining and industr
27. tage free alarm contacts which can be used to shut down the load or to activate an external warning Once an alarm situation is registered there is a three second delay prior to the alarm contacts opening This three second alarm delay is provided to eliminate the possibility of nuisance alarms that may be attributed to brief supply voltage variations When mains voltage is applied to the TSG SRF and the surge diverters are fully function al the alarm contacts will be in the energised or normal state The NC contact will be in Connection of Alarm Circuits short circuit with the COM contact Should the surge handling capacity fall to below the alarm threshold these contacts will be in the de energised or alarm state and the NO contact will be in short circuit with the COM contact The contacts are Fail Safe in that if power to the unit fails the contacts will revert to the de energised or alarm state The alarm contacts should only be connected by an appropriately qualified person owing to the possibility of mains voltage being present in the TSG SRF cabinet Care should be taken to route the alarm wiring away from the input circuit and any other current carrying conductors Alarm contact ratings 2A 30Vdc 600mA 110Vdc 600mA 125Vac PAGE 19 Installation arrangement for Australian MEN Systems 6 6 INSTALLATION ARRANGE MENT FOR AUSTRALIAN MEN SYSTEMS Under Australian Standards classificat
28. ting Instructions Identify the Distribution System SOURCE OF ENERGY L1 L2 L3 N PROTECTIVE CONSUMERS INSTALLATIONS p MAIN DISTRIBUTION EC A2 EQUIPMENT 258 NEMPE vanes INEO 1 EXPOSED CONDUCTIVE PARTS SOURCE EARTH Regulations differ between countries Check compliance with appropriate authorities Use of earth where allowed will enhance protection Figure 3 TN S system In this system a separate neutral and protective earth conductor are run throughout The protec tive PE conductor can be the metallic sheath of the power distribution cable or a separate conductor All exposed con ductive parts of the installation are connected to this PE conductor SOURCE OF ENERGY L1 L2 L3 COMBINED PROTECTIVE AND NEUTRAL x CONSUMERS SEN CERTUM SOURCE INSTALLATIONS TN ADDITIONAL EARTH M S SOURCE p ES 21 EARTH MAIN DISTRIBUTION L MAIN DISTRIBUTION SRF LOAD LOAD EQUIPMENT EQUIPMENT See EXPOSED CONDUCTIVE PARTS Regulations differ between countries Check compliance with appropriate authorities Figure 4 TN C S system In this system a separate neutral and protective earth functions combine in a single PEN con ductor This system is also known as a Multiple Earthed MEN system and the protective conductor is referred to as the combined neutral earth CNE conductor
29. to the unit as this may damage the TSG SRF or load Only replace the primary TSG or secondary TDS surge diverters with an identical type Voltage free alarm contacts are activated after a three second delay should the secondary protection status fall below a pre determined level Fault Checks All indicators alarms and surge counters where fitted should be checked on a regular basis Should any of the display indicators fail to illu minate check for the following conditions Is power available to the TSG SRF Check the input voltage by measuring the voltage between active and neutral Hasthe line fuse blown or upstream circuit breaker or fuse tripped Surge reduction filters of 1250A capacity and above have fuses installed in series with the TSG primary surge protection If these fuses are open circuited for any reason or if the fuse ruptures then the primary surge protection is removed from circuit Servicing amp Trouble Shooting For SRFs utilising input fuses spares of the correct type and rating should be held on site The TSG SRFs are essentially maintenance free although periodic inspection is recom mended to ensure that the ventilation louvres where fitted do not become clogged with dust In high humidity areas dust should be regularly vacuumed from the enclosures to prevent the possibility of voltage tracking Indicators If power is being supplied to the TSG SRF and the indica
30. tors still fail to illuminate then it is possible that either the primary TSG or secondary TDS devices have exhausted their surge capacity In such circumstances the particular devices should be replaced as a matter of urgency as they are no longer providing optimum protection A single status indicator is provided on each TSG surge diverter to indicate the surge capacity of the primary TSG surge diverter s When power is applied and full surge capaci ty is available the status indicator will be illu minated Should the indicator fail to illu minate the TSG should be replaced as optimum protection is no longer provid ed It should be noted that the status indica tor will not illuminate regardless of TSG surge capacity if power is not available The TSG SRF employs TD technology as the secondary protection stage on both single and three phase models The integrity and surge capacity of this stage is indicated by a two segment LED display per phase located on the escutcheon panel of the TSG SRF Should one or both of the secondary stage LED indicators fail to illuminate a reduction in surge handling capacity has occurred In this event the affected surge diverter module should be replaced PAGE 23 Non Standard Products amp accessories TSG Series Surge Reduction Filters 8 NON STANDARD PRODUCTS amp eg TSG SRF3125 SC for a three phase ACCESSORIES 125A Surge Reduction Filter with factory installed surge counter
31. ve negated previous disadvantages associated with spark gaps The use of spark gaps has not been practical in the past due to the high initiation voltages required to activate such devices and also their poor follow current performance PAGE 3 Introduction Both issues have been addressed with the CRITEC TSG a spark gap surge diverter incor porating a triggering device which enables the TSG to operate on much lower voltages than was previously possible Additionally the TSG is able to extinguish the spark and return to the peak mains voltage as soon as the transient event has passed thereby greatly improving follow current performance These considerable technological advances mean that the TSG can be utilised as the primary shunt diverter within the new SRF exploiting the performance benefits of spark gap diverters Incorporating TSG technology into a surge reduction filter has allowed a fundamental breakthrough in the overall design of the filter Ferrite cored inductors which are much smaller than non saturating air cored induc tors required in MOV based surge reduction filters have been used in the CRITEC SRF The use of ferrite cored inductors is possible because the let through voltage from a TSG remains high for only a few microseconds us In comparison the let through voltage from a MOV based device remains at anywhere between 600V and 1000V for the duration of the surge This time can range from 30us to 4005
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