ABB Zenith MX250 Operation And Maintenance Manual Download

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OPERATION AND MAINTENANCE MANUAL

Zenith ZTSCT and ZBTSCT series

Closed Transition and
Bypass Isolation Closed Transition
Automatic Transfer Switches,
100-4000 A

Summary of Contents for Zenith MX250

Page 1: ... OPERATION AND MAINTENANCE MANUAL Zenith ZTSCT and ZBTSCT series Closed Transition and Bypass Isolation Closed Transition Automatic Transfer Switches 100 4000 A ...

Page 2: ...ing 33 Servicing 133 Testing 133 Table of Contents Authorized Service For ABB parts and service call 773 299 6600 Introduction ABB Zenith Transfer Switches are used to provide a continuous source of power for lighting and other critical loads by automatically transferring from Source 1 power to Source 2 power in the event that source 1 voltage falls below preset limits Voltage sensing and system c...

Page 3: ...ater Provide ample air circulation and heat if necessary to prevent condensation 5 to 95 non con densing 30 C to 75 C 22 F to 167 F 40 400 AMP molded shell 20 C to 65 C 4 F to 149 F 40 4000 AMP all other frame and panel types 20 C to 60 C 4 F to 140 F Operating Storage Temperature Temperature Ambient Humidity Final Equipment Inspection Prior to energizing the transfer switch 1 Remove any debris in...

Page 4: ...rt terminals are indicated by a schematic symbol the symbol indicates the contact state for a de energized normal source Figure 3 shows the engine start contacts Make all other necessary control connections to the control panel terminal blocks per the schematics supplied with the ATS NOTE All control wires 18 12 AWG must be torqued to 19 in lbs NOTE When lifting the switch using a spreader bar hei...

Page 5: ...ate on the transfer switch lists the voltage See Figure 4 4 Close Source 1 circuit breaker NOTE The controller will illuminate Source 1 Available LED if proper voltage is sensed 5 Verify the phase to phase voltages at Source 1 line terminals 6 Close Source 2 circuit breaker 7 Start the generator s engine NOTE The controller will illuminate Source 2 Available LED when preset voltage and frequency l...

Page 6: ...TS position and 3 Entelli Switch 250 control function timing 1 Unlock the enclosure 2 Open the enclosure 3 Place the Disconnect Switch in the Inhibit NOTE This step is only performed if the DS Option was purchased 4 Close the external up stream Source 1 circuit breaker NOTES Source 1 Available and Source 1 Position LED s will illuminate If Source 1 Available LED does not illuminate verify that Sou...

Page 7: ...s connect to the engine start relay terminals located to the left of the microprocessor Figure 6 shows the location of these terminals To R T Box To Power Panel Input Output Connectors to I O Modules Engine Start Connections Clock Program Backup Battery Remove protective strip to enable clock functions Network Connector Control Connections The terminals are clearly identified by a label on the mic...

Page 8: ...work interface ZNET input output optional B LCD and Keypad located on the exterior of the door see figure 8 1 User accessibility to the following a LED indication of source availability b LED indication of transfer switch position c LCD screen indicates 1 timer count down numeric 2 event reporting text d Keypad provides user interface to in conjunction with LCD screen 1 Setting sensors and timers ...

Page 9: ...on of options that any one controller has is specified at the time of order placement The following pages include all the options that can reside in the controller Not all units include all options Entelli Switch 250 Entelli Switch 250 S1 OK 01 50 WED 31 MAY 2008 Source 2 Red indicates Source 2 is acceptable for use Source 1 LED Green indicates Source 1 is acceptable for use Exercise Event Impendi...

Page 10: ...T menu Range is 85 to 100 in 1 increments see page 17 Once satisfied the W timer will begin timing to transfer to Source 2 Under Voltage Fail Factory Default 80 This adjustment determines the low voltage threshold Adjust via the SET menu Range is 75 to 98 in 1 increments see page 17 Fail must be a minimum of 2 below Restore setting Once voltage falls below threshold T timer will be bypassed to exp...

Page 11: ...included in the group package Optional Accessory not included but can be added to group package Optional Accessory Can not be used with accessory having the same symbol N A Denotes an Accessory with 2 circuits as a standard Denotes an Accessory with 3 circuits as a standard Table 3 Optional for 40 400 Amp ...

Page 12: ...ed or to simulate a power failure start Generator and run under load Can be configured by end user for 1 7 14 28 365 day cycle See page 16 CDT Load or NO Load One event exerciser with adjustable Engine exercise timer Exercise duration can be set between 5 and 60 minutes in 1 minute increments Can be config ured to run every 1 7 14 or 28 days Factory Default is 20 minutes When exerciser is impendin...

Page 13: ...gize Q7 input to prevent transfer to Source 1 R1 1 R1 3 Source 1 Over Voltage sensing for single and three phase systems Source 1 Over Voltage Fail Factory Default 110 This adjustment determines the maximum acceptable over voltage Adjust via the SET menu Range is 105 to 110 in 1 increments see page 18 Once exceeded the P timer begins timing to signal the Generator to start Source 1 Over Voltage Re...

Page 14: ...nsfer delay R50 Feature can be turned ON or OFF via CFG Menu see page 17 Factory Default if OFF S5P Auto Semi Manual selector In Auto position retransfer to Source 1 is automatic after the T timer has timed out The T time delay is bypassed if Source 2 fails In Manual retransfer to Source 1 is upon depression of BYPASS DELAY button YEN or if Source 2 fails S12P Auto Manual Selector In Auto position...

Page 15: ...face Card How to Set the System Clock How to Set the System Clock Set System Clock time and date If the clock is not set the display will show SET SYSTEM CLOCK on the second line of the S1 OK screen The S1 OK screen will show time hours and minutes on the second line if the system clock has been set Date on third line Setting the System Clock Start from S1 OK screen 1 Remove battery protective whi...

Page 16: ...to initiate Test If the CDT Exerciser is Factory configured for a Load Exerciser the Controller will immediately start a load exercise The controller will start the generator transfer the load to Source 2 and remain in Source 2 for the duration set for EXER S2 RUN TIME in the SET menu The controller will retransfer the load back to Source 1 after the S1 stable timer has timed out and run the gener...

Page 17: ... DOWN to select DAILY WEEKLY 14 DAY 28 DAY or 365 DAY as desired 9 Press SAVE 10 Press MORE repeatedly to BACK then ESC to S1 OK screen How to set SET the DAILY Exerciser 1 Beginning from the S1 OK screen press MORE then SET 2 Press MORE repeatedly until SET EXERCISER screen 3 Press SEL 4 Enter ACCESS code located on white label on the back of the controller 5 Press SEL 6 Cursor is indicated as a ...

Page 18: ...ion 1 2 3 4 5 6 7 8 9 10 11 12 13 14 J4 12v Output Source LN OUT L4 OUT L3 OUT L2 OUT L1 OUT YN IN YE IN TSNL IN Q2 TSL IN S12 IN Lithium Battery Exerciser Battery Replacement K 4100 BR2032 Service Life 10 Years During normal operation User Access Code Default 121212 PRODUCT INFORMATION www abb com 24 Hour Service 773 299 6600 Entelli Switch MX250 A2 A1 RELAY 14 11 12 Customer Input Voltage COM J2...

Page 19: ... 2 3 4 5 6 7 8 9 10 11 12 13 14 J4 12v Output Source LN OUT L4 OUT L3 OUT L2 OUT L1 OUT YN IN YE IN TSNL IN Q2 TSL IN S12 IN Lithium Battery Exerciser Battery Replacement K 4100 BR2032 Service Life 10 Years During normal operation User Access Code Default 121212 PRODUCT INFORMATION www abb com 24 Hour Service 773 299 6600 Entelli Switch MX250 A2 A1 RELAY 14 11 12 Customer Input Voltage COM J2 3 N ...

Page 20: ...8 9 10 11 12 13 14 J4 12v Output Source LN OUT L4 OUT L3 OUT L2 OUT L1 OUT YN IN YE IN TSNL IN Q2 TSL IN S12 IN Lithium Battery Exerciser Battery Replacement K 4100 BR2032 Service Life 10 Years During normal operation User Access Code Default 121212 PRODUCT INFORMATION www abb com 24 Hour Service 773 299 6600 Entelli Switch MX250 A2 A1 RELAY 14 11 12 Customer Input Voltage COM J2 3 N O N C To J2 J...

Page 21: ...sing into the Source 2 Deactivating the test switch will start retransfer to Source 1 The switch will complete its retransfer to Source 1 after the time delay of the T timer The U engine overrun timer allows the engine generator to run unloaded for a pre set cool down period Test Options The ATS can be tested in either of two positions 1 Auto Position Full Transfer Test This test checks the comple...

Page 22: ...o bypass the W time delay if desired After the W time delay the MX controller initiates a transfer signal through the SCR NO to operate the main transfer operator The load is now transferred to the Open position The time delay to Source 2 timer DW begins its timing cycle After the DW time delay the MX controller initiates a transfer signal through the SCR E to operate the main transfer operator Th...

Page 23: ...mes activated The controller initiates a transfer signal through the SCR EO which opens ATS out of Source 2 The SEO limit switch activates The ATS has now closed back into Source 1 position without interrupting the load The ATS defaults to an open transition transfer when Source 1 fails Closed transition transfer is not possible with only one source available If the optional Transition Mode Select...

Page 24: ... Reinstall the manual handle in its holder and the service access cover on the left side of the transfer switch 11 Re connect the transfer switch to AUTO b Auto Location Removal of the closed transition transfer switch if Source 1 and Source 2 contacts remain open 1 Close the bypass switch into the available source 2 Turn the DS to INHIBIT Remove the transfer switch service access cover Close the ...

Page 25: ...ch the preset Restore values the controller initiates re transfer to Source 1 sequence The delay to open Source 2Timer T begins its timing cycle to ensure voltage and frequency stabilization before retransfer A manual pushbutton BYPASS is provided to bypass the T time delay if desired After the T time delay the MX controller initiates a transfer signal through the SCR EO to operate the main transf...

Page 26: ...ip between the two Sources After the ATS closes into Source1 the SN limit switch becomes activated The controller initiates a transfer signal through the SCR EO which opens the ATS out of Source 2 The SEO limit switch activates The ATS has now closed back into Source 1 position without interrupting the load The ATS defaults to an open transition transfer when Source 1 fails Closed transition trans...

Page 27: ...ce In the TEST position the ATS is disconnected from the load now fed through the bypass but control power is present to allow complete operational testing through the control panel of the transfer switch In the ISOLATE position the ATS is completely withdrawn and may be removed from the enclosure for maintenance if desired After the isolation operation if the bypass is closed on Source 1 and if t...

Page 28: ... ATS a Place ATS into drawer slots front rollers first b Turn DS to Inhibit c Manually position ATS into same source as Bypass Switch d Reconnect multipin plugs and external connections to ATS e Push ATS inward to engage carriage f Move ALH to Test location as indicated by light g Turn DS to Auto and use TS to electrically operate ATS h Turn DS to Inhibit i Move ALH to Auto location j Turn DS to A...

Page 29: ...connect ATS a Place ATS in slide mechanism b Unlock slide mechanism Slide ATS over power panel latches and rotate latches to horizontal position c Turn DS to Inhibit d Manually position ATS into same source as Bypass Switch e Reconnect multipin plugs and external connections to ATS f Rotate crank mechanism clockwise until ATS Test light is illuminated g Turn DS to Auto and use TS to electrically o...

Page 30: ...er latches of ATS to outermost position c Turn DS to Inhibit d Manually position ATS into same source as Bypass Switch e Reconnect multipin plugs and external connections to ATS f Rotate crank mechanism clockwise until ATS Test light is illuminated g Turn DS to Auto and use TS to electrically operate ATS h Turn DS to Inhibit i Rotate crank mechanism clockwise until ATS location pointer is aligned ...

Page 31: ... Automatic Transfer Switch access panel f Rotate crank mechanism clockwise until ATS Test light is illuminated g Turn DS to Auto and use TS to electrically operate ATS h Turn DS to Inhibit i Rotate crank mechanism clockwise until ATS location pointer is aligned with Auto mark on location indicator ATS must be in same source as Bypass j Turn DS to Auto and open Bypass with MBH k ATS is now fully au...

Page 32: ...s accomplished by the Controls Power Supply CPS This method of switching operator voltage and applying power and sensing voltage to the printed circuit board isolates the MX250 from the line voltage further protecting the controller from harmful line transients Controls Power Supply CPS Primary CPS CPS Voltage Assembly Board at 50 60 Hz Part No No 120V 50P 1224 50P 1200 208 220V 50P 1225 50P 1201 ...

Page 33: ...OUND COMMON J5 24V 10V 11V 10V 24V 10V 11V 10V XN1 XN2 20 21 22 XN1 XN2 XE1 XE2 SOURCE 1 CONTROL TRANSFORMER SOURCE 1 3 PHASE SENSING TRANSFORMER SOURCE 2 CONTROL TRANSFORMER SOURCE 2 3 PHASE SENSING TRANSFORMER SINGLE PHASE SOURCE 2 SENSING 3 PHASE SOURCE 1 SENSING SOURCE 1 CONTROL POWER SOURCE 2 CONTROL POWER 800 902 804 803 805 806 804 807 900 902 904 903 905 906 904 907 800 900 SOURCE 2 24V OU...

Page 34: ...faults When using this guide it will ask several questions about the condition of the switch This guide will then list an order of the possible faults You will then look at the first suspected fault to determine if it is the problem If it is not a fault you go to the second suspected fault If you go through all of the suspected faults or the chart instructs you to call an ABB Zenith Representative...

Page 35: ... in a 3 5 year service cycle The battery maintains the exerceser memory only and does not otherwise affect the operation Testing A manual operator handle is provided with the transfer switch for maintenance purposes only Manual operation of the switch must be checked before it is operated electri cally Both power sources must be disconnected before manual operation of the switch Insert the handle ...

Page 36: ...Our complete product line will allow you to specify a total power management system while maintaining overall compatibility and the most comprehensive warranty in the industry Commitment to the Customer All team members at ABBare aware of the critical situations in which our products are called upon to perform With that understanding comes an obligation beyond merely fulfilling an order or turning...

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