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A - 10

Useful Equations

Appendices

Apparent Power (kVA)

1000

kVAr

kVA

kVAr

kVA

−

Resistive Power (kW)

1000

kVAr

kVA

−

Reactive Power (kVAr)

1000

kVA

kVAr

kVA

kVAr

−

Power Factor (pf

)

kVA

cos

Current (A)

1000

kVA

De-rate from Nominal Voltage and Frequency

nom

kVAr

























Note: All voltages are phase-to-phase values and assume a 3-phase system.

Содержание SIGMA LT 3010

Страница 1: ...SIGMA LT Load Banks User Manual Revision Number 5039 V2 0 Revision Date 24 6 2020 ...

Страница 2: ...ubject to change without notice The Company retains exclusive rights to the intellectual property in any designs specifications publications and software described or included herein The property shall not be used in whole or part for any purpose other than in connection with the Company s particular products that this document is intended to accompany The Company s identification marks on its pro...

Страница 3: ...SCO Sigma LT Load Banks 2 6 Location Setup in a plant room Inlet Outlet Wind effects Avoiding hot air re circulation Electrical Installation 2 8 Voltage and frequency ratings External supply wiring the fan and control power source Connectors Supply on test general points Is a local isolator required Protective earth connection Making connections for single phase operation Single phase wiring Contr...

Страница 4: ...e text These include installation drawings a certificate of conformity and some information about electromagnetic compatibility Chapter One provides an introduction to the general principles of power supply testing and explains how a ASCO load bank makes the process easier safer and more reliable It then provides an introduction to Sigma LT load banks and its main features Chapter Two covers all o...

Страница 5: ...he airflow Combustible material left near the air discharge should be removed Only operate the load bank with all the guards in place and with all of the covers and protective screens securely in position Make sure that all equipment is adequately grounded this applies equally to the Supply on Test and the load bank Ensure all cables are in good condition and adequately rated for the planned load ...

Страница 6: ...can be accurately measured and recorded and it must also be capable of dissipating the large amount of heat that is generated during the test And it is critically important that the test does not put the site load at risk To achieve all this requires a specialist item of equipment the load bank These consist of an array of load elements combined with a control system designed to ensure that a prec...

Страница 7: ...oggle Switch Control Load contactors Fuses Current Transformers External supply for fan and controls Supply on Test Sigma LT Hand Held METERING MASTER LOAD 5 kW 5 kW 10 kW 10 kW 25 kW 50 kW 50 kW 50 kW REMOTE LOCAL ON MODE V Hz kW V x 3 A x 3 LOAD SELECT R ASCO 3000 Series Introducing ASCO Load Banks 1 5 ASCO Load Bank Control Options Reliable testing requires precise control of the load applied t...

Страница 8: ...carried out include Load duration tests also known as a heat run designed to record steady state voltages frequency and also to calibrate instrumentation and measure emissions and fuel consumption Load acceptance tests which check changes in frequency and voltage regulation due to sudden load changes These tests ensure that the rise and fall of the generator s output voltage and frequency remain w...

Страница 9: ... Bank 1 Load Bank 2 Load Bank n Sigma LT Hand Held Supply under test In Out In Out In 1 9 Introducing ASCO s Sigma LT load banks Sigma LT load banks are resistive portable and indoor load banks Sigma LT load banks can be controlled either locally or remotely The load banks can be linked together in a network to provide high capacity load tests with the functionality to control a specific load bank...

Страница 10: ...le or part without prior written authority Figure 1 4 ASCO Sigma LT 3020 Forklift Pockets Control Panel Air Intake Hot air exhaust Twist Lock Connectors External Inlet Switchgear Compartment Power Terminal Compartment Chapter Two Load Bank Setup This chapter covers all of the procedures that need to be carried out before a ASCO Sigma LT load bank can be put into operation It explains how to setup ...

Страница 11: ...hat all personnel involved in transportation and setup have the appropriate training and experience needed to carry out the operation safely Only operate the load bank with the covers and protective screens securely in position Make sure that both the Supply on Test and the load bank are adequately grounded Ensure all cables are in good condition and adequately rated for the planned load and that ...

Страница 12: ...operate correctly and safely in the position you have chosen Location The first thing to decide when setting up a load bank is where the unit is to be located You need to consider the following to ensure that the unit can be operated safely Environment Sigma LT load banks are designed for indoor use only A standard Sigma LT load bank can be used in an ambient temperature between 10 C and 40 C at 9...

Страница 13: ... the load bank air outlet plus whatever is required for any additional plant Wind effects The load bank must be protected from the effects of the wind which in some circumstances could defeat the fan The inlet and outlet grilles or louvres should preferably be on the same side of the building The effect of natural wind is then cancelled out regardless of its direction Other arrangements need caref...

Страница 14: ...ure 2 2 Consult the load bank s name plate for voltage and current ratings before making connections Note The Load Bank supply cables must be protected by a Short Circuit Protective Device SCPD which is suitably rated to the capacity of the supply cables 2 9 External supply wiring the fan and controls power source Refer to the load bank s rating plate for the external power supply requirements The...

Страница 15: ... load bank the supply voltage and frequency Refer to chapter 4 for more information about changing between single and three phase testing Single phase wiring Single phase operation is achieved by connection between two phase terminals one of which is used as neutral A C connection mode The A C connection mode shown in Figure 2 6 will give approximately 50 loading capacity when the nominal load ban...

Страница 16: ...Switch Control Operation This chapter explains the local digital toggle switch operation of ASCO Sigma LT load banks It describes the functions of the various buttons and displays For troubleshooting and error message see chapter 5 ...

Страница 17: ...r inlet of the load bank extensive damage is possible due to re circulating the cooling air Ensure that there is no loose paper plastic bags or other debris that could be drawn in to the air inlet or any combustible material left within range of the air discharge After removing the load at the end of a test allow the fan to run for three minutes to dissipate the residual heat 3 3 Turning the load ...

Страница 18: ...If 30kW is required press 5kW 5kW 10kW and 10kW Then press master load on Alternatively if master load is already on there will be a one second delay then load will be applied automatically The one second delay allows a synchronous load change MASTER LOAD Master load applies any load selected when turned on and rejects all load when turned off The master load LED will illuminate when on and exting...

Страница 19: ...hapter explains the optional hand held operation of ASCO Sigma LT load banks It describes the functions of the setup buttons and displays For digital toggle switch operation see chapter 3 and for troubleshooting and for error messages see chapter 5 ...

Страница 20: ...networking a load bank with small load steps with larger load banks Redundancy can be achieved by using n 1 load banks This can be important when running 24 hour commissioning tests The Hand held Figure 4 1 The Sigma LT Hand held Chapter Four 4 3 Touch Screen Display Cable connection point USB Port Aluminium Enclosure 4 3 Key See below for the list of symbols that will need to be used for operatio...

Страница 21: ...ELECT R ASCO 3000 Series 4 5 Set Up Figure 4 2 Sigma LT network cable connection configuration Connect load banks to supply on test see chapter 2 Using the network cable connect the hand held to the first load bank in the upper socket Connect other load banks by using a second network cable from the lower socket to the upper socket of the next load bank repeat as necessary The load bank metering d...

Страница 22: ...rking screens With more than one load bank in a network it may be useful to see an overview of the load banks connected and individually control each one From the main instrumentation screen press the Network Overview button The screen will show load measured in kW as a total on the network and for each load bank The Network Overview will summarise the load measured and the load available on the w...

Страница 23: ...Firmware upgrades To upgrade the firmware in either the hand held or the load bank connect USB device containing the upgrade files This process will upgrade all of the load banks in the network Contact our support team for more information about the latest firmware files Chapter Four 4 9 Settings Figure 4 6 Hand held settings screens From the main screen press Settings Working Voltage Setting the ...

Страница 24: ...status LEDs will visually show the load bank status to quickly show any errors Press next screen to display the load bank and hand held event history This will be updated as new events occur This feature is also available for individual load banks in the network Chapter Four Chapter Five Maintenance Troubleshooting This chapter describes both the routine maintenance procedures needed to keep ASCO ...

Страница 25: ...nk Inspect the equipment for signs of damage Ensure that the inlet and outlet grilles are free from dirt debris or obstruction Remove the grilles and clean them if necessary Check that both the external supply and the Supply on Test are properly connected Check that the connecting cables are free from damage Check that all cables are secured and routed so that they do not present a safety hazard E...

Страница 26: ...e hand held or digital toggle switch control settings For three phase operation verify that all of the phases are present Loading problem Check the load fuses Check the load contactors Check the load elements Error Type Display Possible Causes Communications Loss transmit error err Conn t Unplugged cable from load bank to hand held Damaged cable Communications Loss receive error err Conn r Unplugg...

Страница 27: ... in supply connection check wiring according to single phase connection mode 5 6 Sigma LT Hand Held Display As well as the Sigma LT digital toggle display messages and errors will also appear on the hand held The hand held will show load bank specific and overall network messages Figure 5 2 The Sigma LT Hand held error display Sigma LT Hand held Error Messages Chapter Five Note When the hand held ...

Страница 28: ...tional information that may be useful but does not easily fit in with the rest of the text This includes a specification for each of the ASCO Sigma LT load banks and a number of diagrams that show dimensions and space requirements for each unit ...

Страница 29: ...ront view and side view Figure A 2 3020 back and side views Appendices NJ Froment Co Ltd This document may not be copied or disclosed in whole or part without prior written authority A 3 Appendices 3020 Installation Diagrams Figure A 3 3020 plan view ...

Страница 30: ...ront view and side view Figure A 5 3010 back and side views Appendices NJ Froment Co Ltd This document may not be copied or disclosed in whole or part without prior written authority A 5 Appendices 3010 Installation Diagrams Figure A 6 3010 plan view ...

Страница 31: ...A 6 3040 Installation Diagrams Figure A 7 3040 front view and side view Figure A 8 3040 back and side views Appendices A 7 Appendices 3040 Installation Diagrams Figure A 9 3040 plan view ...

Страница 32: ...pean Community Directive 89 336 EEC To ensure that the requirements of the Directive and related standards are satisfied it is essential that the equipment is used as intended and in full accordance with the operating instructions Immunity to external interference EN 61000 Part 6 This equipment will not suffer permanent damage or become dangerous or unsafe as a result of electromagnetic interferen...

Страница 33: ...r kVA kW pf I V kW pf kVA kW Reactive Power kVAr 2 2 2 2 1000 3 1 1 kW kVA kVAr pf I V kVAr pf kVA kVAr Power Factor pf kVA kW pf φ cos Current A 3 1000 3 1000 pf V kW I V kVA I De rate from Nominal Voltage and Frequency nom nom nom nom nom kVAr F F V V kVAr kW V V kW 2 2 Note All voltages are phase to phase values and assume a 3 phase system ...

Страница 34: ...d Easton on the Hill Cleveland OH 44125 USA Stamford PE9 3NP United Kingdom Tel 216 573 7600 Tel 44 0 1780 480033 loadbanks ascopower com LBsales ascopower com froment sales ascopower com customercare ascopower com 2020 ASCO Power Technologies All Rights Reserved ...

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