Model A User Manual - i-STS
Contents
1. There will be a short 15 sec start up period after which the STS will begin powering your equipment CONSIDERATIONS Things to consider when connecting the Static Transfer Switch Synchronism The smoothest change over occurs when the supplies are in synchronism Some equipment like transformers may saturate when a transfer occurs when not in synchronism This causes large currents to flow into the load which could cause damage to the transformer trip protective devices or blow fuses The STS is configured by default to have a 10ms power down break inserted if the phase difference between the sources exceeds 30 degrees The break has been inserted for a safe mode on purpose when the sources are out by more than 30 degrees This has been done to allow the load to power off then on again this being safer than the alternative If possible it s best to make sure the supplies are in synchronism Installation 9 Remote Monitoring Relay Status Contacts are normally closed Contact is held open when there is no alarm Do not connect any more than 50 V DC 0 5 Amps LJ Not suitable for 230 V AC SAFETY The most crucial aspects of the install are Safety e Damage to Goods e Electrical Connectivity e Mechanical Integrity e Cooling e Overloading The STS is powered from two separate sources It is important that you install correct signage and procedures within the enclosure and it s immediate vicinity to warn personnel2. Provided these precautionary aspects are headed the STS will provide you with a reliable back up supply capability Output Loading 12 FAULT DIAGNOSIS amp MAINTENANCE The STS has been manufactured to provide a long reliable and useful life However all equipment needs some maintenance RECOMMENDED SCHEDULE The unit should be checked once every 6 months sooner if the environment is bad e Check the LED states to ensure that the STS is online on preferred if selected and that there is no alarm condition LED lit RED e Remove dust from the front grill and heat sinks e Inspect cable plug connections for overheating Warning The user should not undertake repair procedures or access the internals of the equipment If the unit is faulty then it should be removed from service and returned for repair Fault Diagnosis amp Maintenance 13 SPECIFICATIONS Power Type Current Rating Nominal Voltage Fault Current Frequency THD Power Factor Crest Factor Overload Capacity Inputs Outputs Switching Transfer Type Detection Break Time Communication and Control User Interface Contacts Out Physical Dimensions mm Weight Colour Finish Compliance Regulatory Approvals Standard Warranty 2 poles 1 phase 4 x AC static switches 16A or 32A 115 or 230V 20 1kA for 20ms 100A Fused 50 60Hz auto detection 15 No Limit 3 5 1 80A for 30 sec 100A for 1 sec 1000A for 20
3. must be applied to the STS to ensure a clean break during transfers OVERLOAD CAPACITY Load 80A 100A 1000A Time 30s 1s 20ms Overview USER INTERFACE FRONT PANEL OVERVIEW 10 11 12 Name Remote Contact Alarm LED Alarm RST Button Preferred Indicator Preferred Button Supply 1 Okay LED Supply 2 Okay LED Sync Okay LED On Supply 1 LED On Supply 2 LED Output Okay LED Load LEDs Description For integration into BMSs this voltage free alarm contact closes whenever the general alarm condition is flagged 50VDC Max When there is an alarm that has not been acknowledged these LEDs will flash If the alarm has been acknowledged but the condition still exists the LEDs will remain solid Pressing this button acknowledges new alarms causing the audible portion to turn off and the LEDs to go from flashing to solid These three LEDs indicate which supply is selected as the preferred supply Supply 1 1 Supply 2 II or either none may be selected Pressing this button repeatedly will scroll through which supply is selected as the preferred supply Green Red indicated that Supply 1 is within out of tolerance Green Red indicated that Supply 2 is within out of tolerance Green Red indicated whether Supply 1 and Supply 2 are within not within enough degrees of synchronization of each other to perform a transparent transfer Green Red indicates the load is on not on Supply 1 Green Red indicates the
4. of this aspect and what isolation checking and precautionary processes and procedures need to be adopted to make the STS and equipment connected to the STS safe to work on LJ Caution This equipment receives power from more than one source Disconnect output and all input sources of power from this equipment before servicing Do not proceed with the installation or operation of the STS if it has been damaged Carefully inspect the STS for any damage that may have occurred during shipping unpacking or during and after any installation process Take care when handling the STS and ensure that it is physically supported during the installation process At the end of the installation process the STS should be firmly and securely bolted within the rack Ensure also that all of the cables are securely connected and supported and that all safety covers are installed There should be NO live exposed or accessible contacts that could cause electrical shock if contact is able to be made This is especially important when plugging and unplugging the input supply 1 or supply 2 plugs as leakage currents could cause dangerous voltages to appear on the incoming leads which can be a shock hazard and cause equipment damage if contact with other equipment is inadvertently made Installation 10 LJ Caution This equipment is not suitable for installation into environments that utilise RCD earth leakage detectors on the inputs of the static transfer
5. switch LJ Warning High leakage currents on isolated incoming and outgoing circuits Earth connection is essential before working on circuits or connecting disconnecting supplies LJ TREAT AC INCOMING LEADS AS LIVE IF DISCONECTING FROM SOURCE Installation 11 OUTPUT LOADING Highlighted below on the front panel are the Load Indicator LEDs Whilst the LEDs are in the green area the unit is operating within its design limits If the Red LED bar is lit then the unit is overloaded and the load should be decreased i STS 400 Front Panel Load LEDs In addition there may be loading limitations when using the IEC inlet plugs and outlet sockets as they are rated for 10 and 16 Amps maximum only Each of the IEC C13 outlets is rated for 10 Amps however the load of the sum of each block of 4 must not exceed 15 Amperes in total In addition there are 2 x IEC C19 outlet sockets Each is rated for up to 16 Amps Please ensure that the total loading does not exceed the incoming supply capacity it may be limited by the incoming IEC connections a Warning Both the rating of the unit and the incoming source leads should be considered so that it is not overloaded Before powering the STS up ensure that the load side is safe and any equipment or cabling connected is ready to be safely powered up Do not open the STS If it is faulty it should be removed from service and returned for analysis and repair
6. N 7 Ignore ON ON 8 Default OFF OFF 9 Short OFF OFF A Dynamic OFF OFF B Ignore OFF OFF C Default ON OFF D Short ON OFF E Dynamic ON OFF F Ignore ON OFF Operation Settings INSTALLATION REAR DETAIL FOR 32A The following figures detail the rear of the Model A 32A STS GLAND PLATES To access the input supply terminals remove the 2 gland plates highlighted in red below GEE CONNECTION DIAGRAM Shown below is the connection diagram Please note that the terminals do not have the same EPRERBERE S2 S1 NILIG GINJL connection pattern for S1 and S2 DO DI VY O elele T DOD I O i The terminals should be torqued to at least 0 5 Nm and no more than 0 6 Nm Maximum cable size is 6mm Installation 8 PROCEDURE 1 Ensure that your two input sources are within the tolerances outlined in the Recommended Values table 2 Secure the STS into your rack by the four holes provided in the front of the unit Plug the equipment that will be supplied by the STS into the output sockets at the rear of the STS Output Sockets 8 x IEC C13 2 x IEC C19 4 Plug or terminate your two source leads into the input sockets or terminals of the STS and apply power Please note that terminals should be torqued between 0 5 0 6 Nm Input Sockets 2 x IEC C20 or Terminals 5
7. i STS Model A User Manual 19 inch Rack Mount STS 16 32 A1P2 CONTENTS Contents Overview Model A Layout Operational Description Operating Parameters User Interface Front Panel Overview Controls Remote Contact Operation Settings Installation Rear Detail for 32A Gland Plates Connection Diagram Procedure Considerations Safety Output Loading Fault Diagnosis amp Maintenance Recommended Schedule Specifications Oo OO Oo wo Oo N DD UV UH BP U N N Be FP e e HE LE gt U W N O Contents OVERVIEW MODEL A LAYOUT Input isolators Alarm LED Preferred LEDs Load LEDs S1 S2 Remote contact Mimic Alarm cancel button Preferred source button 16A ONEYWENONENWENENS es ES of oh of ch of oF och oOo a L o o E o o o F Oo S2 IEC C20 8 x IEC C13 2 x IEC C19 S1 IEC C20 32A ESEBBR8E S2 Terminal with gland 8 x IEC C13 2 x IEC C19 S1 Terminal with gland Overview 2 OPERATIONAL DESCRIPTION A Static Transfer Switch STS provides your critical load or single chord single supply equipment with an alternative supply source thus increasing and improving power reliability and availability The Model A is a 2 pole single phase 1RU 19 inch rack mount STS Both the active conductor and the neutral are switched Thyristors are used to undertake the switching process These are many times faster and more reliable than their elec
8. load is on not on Supply 2 Green Red indicated the output is OK faulty There are eight LEDS here the bottom six are green and indicate roughly 10 90 loaded The seventh LED is orange and indicates 100 loaded The eighth LED is red and indicates that the STS is over loaded Refer to page 6 for details on STS overloaded behaviour User Interface CONTROLS Preferred Button Pressing this button repeatedly will scroll through which supply is selected as the preferred supply A transfer will occur after a 3 second delay if the unit is currently on the alternate supply If the user does not want a preferred source the button is pressed until Preferred Indicator shows that none is selected Alarm RST Button The Alarm when activated will initiate an audible alarm condition which will be reset automatically once the condition returns to normal and or manually reset by the user by pressing the Alarms Reset pushbutton REMOTE CONTACT It is prudent to provide physical separation between control circuits and power circuits This avoids confusion reduces interference and increases the reliability of your installation Make sure that all control wiring is protected and securely supported so that it is not inadvertently unplugged or removed whilst other equipment is being installed or removed within the enclosure Remote Monitoring Relay Status Contacts are Normally Closed Contact is held Open when there is no alarm When
9. ms 16A IEC 19 sockets 32A 6mm Block Terminals 8 x IEC 13 outlets 2 x IEC 20 outlets Thyristor SCR Break before make Digital lt 1ms Normal lt ims Max lt cycle LED mimic and load indication Preferred supply and alarm cancel buttons 1 x voltage free general alarm indicator 44h x 483w x 285d 2 5kg Black Power coat AS3100 amp ASNZ IEC 62310 1 2 amp 3 CE Approval 36 months repair or replacement policy Specifications 14 i STS Manufacturing is a subsidiary of STATIC POWER PTY LTD ABN 42 101 765 913 Post to Box 2003 Manufactured at Phone 613 9437 0494 5 Candlebark Court Fax 613 9437 0939 Research Delivery Centre Research VIC 3095 Email sales i sts com au Research VIC 3095 Australia Web www i sts com au Australia Copyright 2014 STATIC POWER PTY LTD This user manual is protected under international copyright laws No part of this user manual may be reproduced distributed translated or transmitted in any form or by any means electronic or mechanical including photocopying recording or storing in any information storage and retrieval system without the prior written permission of STATIC POWER PTY LTD 15
10. power fails the relay contact closes fail safe The Relay contact and the RED Alarm LED are driven by the same logic The LED Relay is operated when e ON Supply 1 when priority is Supply 2 e On Supply 2 when priority is Supply 1 e Not in Synchronism e Supply 1 or Supply 2 are not in spec e There is was an overcurrent overload load fault condition e There has been an SCR Fault e The Auto retransfer to preferred source has locked out further transfers max number of automatic re transfers to the preferred supply has been exceeded Do not connect any more than 50 V DC 0 5 Amps NOT SUITABLE FOR 230 V AC User Interface OPERATION SETTINGS Operation settings can be configured using the rotary switch located on top of the unit Described below are the three independent settings that be configured Sync Default When supplies are more than 672 out of phase a 50ms break will be inserted during a fault condition Short When supplies are more than 672 out of phase a 10ms break will be inserted during a fault condition Dynamic An intelligent phase dependent break is inserted Ignore Ignores phase difference Eco Off Normal fault detection On Breaks less than 5ms will not cause a transfer Alarm On General alarm will generate a sound Off General alarm will not generate a sound Rotary Position SYNC ECO ALARM 0 Default OFF ON 1 Short OFF ON 2 Dynamic OFF ON 3 Ignore OFF ON 4 Default ON ON 5 Short ON ON 6 Dynamic ON O
11. tromechanical equivalents Supply 1 Supply 2 Load The STS continuously monitors the supply sources and should the presently connected supply fail or degenerate to not be useable the critical load is automatically and transparently transferred to the alternate source This switching process is undertaken as a break before make transfer The break in the supply transition is so short that it is not seen by the critical load This is preferable to a make before break or overlapping changeover because when the two supplies are different and connected together large and unpredictable currents would flow between the sources degenerating both supplies and therefore the supply to the critical load In case of downstream fault the STS will not transfer the fault to the alternate supply even if the voltage is adversely affected Once the fault current has cleared the STS will resume normal operation protecting the critical loads from voltage disturbances 10 second settling time Overview 3 OPERATING PARAMETERS ABSOLUTE MAXIMUM VALUES Parameter Input Voltage Load Current Input Synchronisation Ambient Temperature RECOMMENDED VALUES Parameter Input Voltage Load Current Input Synchronisation Ambient Temperature 210V 1A 15 0 Max 265V 16 or 32A 180 45 Max 255V 16 or 32A 15 30 Due to the nature of the silicone controlled rectifiers used in all static transfer switches some current
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