Larson Electronics PDU-ATS Series User Manual
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Larson Electronics PDU-ATS Series User Manual

Automatic transfer switch
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DANGER is used in this manual to warn of high
voltages capable of causing shock, burns, or death.
WARNING is used in this manual to warn
of possible personal injury.
CAUTION is used in this manual to warn
of possible equipment damage.
ground lug
power
connections
Transfer
Switch
power
connections
Larson Electronics, LLC
Automatic Transfer Switch
User Manual
Phone: (877) 348-9680
Refer to the outline and wiring drawings provided
with your ATS for all installation and connection
details and accessories.
An experienced licensed electrician must install the ATS.
Each automatic transfer switch contains a rating label to
define the loads and fault circuit withstand / closing ratings.
Refer to the label on the transfer switch for specific values.
Do not exceed the values on the rating label.
Exceeding the rating can cause personal injury
or serious equipment damage.
The Transfer Switch nameplate includes data for each
specific ATS. Use the switch only within the limits shown
on this nameplate.
field connections
terminal block TB
Fax: (903) 498-3364
PDU-ATS SERIES
Rating Label
Nameplate
Group 5
Controller
Transfer
Control
& lights
www.larsonelectronics.com
1 of 9

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Summary of Contents for Larson Electronics PDU-ATS Series

  • Page 1 PDU-ATS SERIES Automatic Transfer Switch User Manual Refer to the outline and wiring drawings provided with your ATS for all installation and connection DANGER is used in this manual to warn of high details and accessories. voltages capable of causing shock, burns, or death.
  • Page 2 SECTION 1 INSTALLATION Larson Electronics Automatic Transfer Switches are Mount the ATS vertically to a rigid supporting factory wired and tested. Field installation simply structure. Level all mounting points by using flat requires mounting and connection of service cables, and washers behind the holes to avoid distortion of the auxiliary control circuits (if required).
  • Page 3 See Figure 1–3. Be sure to reinstall the barriers carefully. The transfer switch is connected to the left side of the controller by a plug-in harness (two plugs). Larson Electronics, LLC 3 of 9 Phone: (877) 348-9680 Fax: (903) 498-3364...
  • Page 4 3 — Electrical Operation, page 1–6 Continue to 1 – Manual Operation Test on next page. Do these checks in the order presented to avoid damaging the ATS. Larson Electronics, LLC 4 of 9 Phone: (877) 348-9680 Fax: (903) 498-3364...
  • Page 5 (lower) and opens the contact position and opens the Normal Emergency source indicators (left side) source contacts (lower) contacts (upper) Figure 1-10. 1000 – 4000 ampere G design transfer switches. Larson Electronics, LLC 5 of 9 Phone: (877) 348-9680 Fax: (903) 498-3364 www.larsonelectronics.com...
  • Page 6 (on the and Frequency of each source. generator set) in the automatic position. Close enclosure door. Now continue to 3 – Electrical Operation on next page. Larson Electronics, LLC 6 of 9 Phone: (877) 348-9680 Fax: (903) 498-3364 www.larsonelectronics.com...
  • Page 7 Feature 2E time delay (unloaded running engine cool- This completes the Functional Test of the ATS. down). The Emergency Source Accepted light should go off. Larson Electronics, LLC 7 of 9 Phone: (877) 348-9680 Fax: (903) 498-3364 www.larsonelectronics.com...
  • Page 8 If the transfer switch is in the Normal position, performance. Should the need for replacement parts first close the normal source circuit breaker. arise, please contact Larson Electronics. Second, close the emergency source circuit breaker. Third, place the standby engine starting control in the automatic position.
  • Page 9 (if used). automatic position. – to the normal source. * These are factory settings. Refer to the Group 5 Controller User’s Guide. Larson Electronics, LLC 9 of 9 Phone: (877) 348-9680 Fax: (903) 498-3364 www.larsonelectronics.com...

  • Page 10: Description

    (except for nominal voltage) and time result in minor or moderate injury. delays can be made through a system of menus. Larson Electronics, LLC 1 of 33 Phone: (877) 348-9680 Fax: (903) 498-3364...
  • Page 11 *THIS PAGE INTENTIONALLY LEFT BLANK* Larson Electronics, LLC 2 of 33 Phone: (877) 348-9680 Fax: (903) 498-3364 www.larsonelectronics.com...

  • Page 12: Table Of Contents

    Open-Transition ................................23-24 Closed-Transition ................................25-27 Delayed-Transition ................................28-29 APPENDIX 22-25 ................................Controller Cover Removal ..............................30 DIP Switch Actuators ............................... 31-32 Voltage Jumper Blocks ................................. 33 Larson Electronics, LLC 3 of 33 Phone: (877) 348-9680 Fax: (903) 498-3364 www.larsonelectronics.com...
  • Page 13 The up and down arrow keys (increase value and decrease value) modify a setting (setup parameter) while in the settings level screens. Escape key The escape key ignores a change and returns to the status level. Larson Electronics, LLC 4 of 33 Phone: (877) 348-9680 Fax: (903) 498-3364...
  • Page 14 Last 99 events in date and time order; six types and seven reasons are logged. Service Statistics/Diagnostics, Factory Selectable Features see pages 18 For factory service use only. Larson Electronics, LLC 5 of 33 Phone: (877) 348-9680 Fax: (903) 498-3364...
  • Page 15 Once the password is entered it will stay unlocked for 5 minutes after last key is pushed so that you do not have to keep entering it. So, to save time, plan to make all your settings at one time. Larson Electronics, LLC 6 of 33 Phone: (877) 348-9680 Fax: (903) 498-3364 www.larsonelectronics.com...

  • Page 16: Settings

    EMERG VOLTAGE Over Voltage Trip * 102 to 110 % OF Trip * The Over Voltage and Over Frequency reset is fixed at 2% below the trip setting. Larson Electronics, LLC 7 of 33 Phone: (877) 348-9680 Fax: (903) 498-3364 www.larsonelectronics.com...

  • Page 17: Voltage And Frequency

    This display appears only if the CP is set for 3 phase sensing on Emergency. When enabled, the CP considers the Emergency source unacceptable if the calculated voltage unbalance is greater than the specified dropout. Larson Electronics, LLC 8 of 33 Phone: (877) 348-9680 Fax: (903) 498-3364 www.larsonelectronics.com...

  • Page 18: Time Delay Settings

    These time delays appear only on the display for a 4ACTS, 7ACTS, or 7ACTB closed–transition transfer switch.  This time delay appears only on the display for a 4ADTS, 7ADTS, or 7ADTB delayed–transition transfer switch Standard adjustment up to 6 seconds (total power outage). For additional time delay, contact Larson Electronics.  See CAUTION .
  • Page 19 Feature 31G — Pre–transfer time delay signal Feature 31N — Post–transfer time delay signal CTTS TDs (not shown) see page 6 DTTS TD (not shown) see page 6 Larson Electronics, LLC 10 of 33 Phone: (877) 348-9680 Fax: (903) 498-3364 www.larsonelectronics.com...

  • Page 20: Time Delays

    These features do not appear on the display unless both sources have 3 phase sensing enabled.  These features appear only on a 4ATS, 7ATS, or 7ATB (open–transition automatic transfer switch) Larson Electronics, LLC 11 of 33 Phone: (877) 348-9680 Fax: (903) 498-3364 www.larsonelectronics.com...

  • Page 21: Features

    The load disconnect continued on next page time is set by the Bypass DT Delay parameter. Bypass InPhase – Yes means the inphase monitor is active during load transfer. Larson Electronics, LLC 12 of 33 Phone: (877) 348-9680 Fax: (903) 498-3364...

  • Page 22: General Settings

    Password * Note: If the language setting ENGLISH S1–S2 is selected the usual display words Normal (N) and Emergency (E) are changed to Source 1 (S1) and Source 2 (S2). Larson Electronics, LLC 13 of 33 Phone: (877) 348-9680 Fax: (903) 498-3364...

  • Page 23: General

    This display allows the user to lock or unlock the door–mounted user controls. (not the Power Control Center). YES means locked. NO means unlocked. Change Password see page 6 This display allows the user to change the controller password. Larson Electronics, LLC 14 of 33 Phone: (877) 348-9680 Fax: (903) 498-3364 www.larsonelectronics.com...

  • Page 24: Engine Exerciser Settings

    Run Time (P1 to P7) P1 ENGINE EXERCISER engine exerciser duration minutes 0 to 59 Run Time (P1 to P7) * For the year 2000, enter 00. Larson Electronics, LLC 15 of 33 Phone: (877) 348-9680 Fax: (903) 498-3364 www.larsonelectronics.com...

  • Page 25: Engine Exerciser

    – week (all, alternate, 1st, 2nd, 3rd, 4th, or 5th week) – day of the week (mon, tue, wed, thu, fri, sat, sun) Run Time — duration (length of time) that the generator will run. Larson Electronics, LLC 16 of 33 Phone: (877) 348-9680 Fax: (903) 498-3364 www.larsonelectronics.com...

  • Page 26: View Event Log

    Normal source under voltage EmergPHR Emergency source phase rotation NormOV Normal source over voltage EmergVUNB Emergency source voltage unbalance NormUF Normal source under frequency Feature 6 Feature 6 activated Larson Electronics, LLC 17 of 33 Phone: (877) 348-9680 Fax: (903) 498-3364 www.larsonelectronics.com...

  • Page 27: Service - Statistics/Diagnostics

    These displays show the status of several of the controller’s input and output lines. CP Software This display shows the version of the loaded software and the date of its release. Larson Electronics, LLC 18 of 33 Phone: (877) 348-9680 Fax: (903) 498-3364 www.larsonelectronics.com...

  • Page 28: Service - Factory Selectable Features

    This display is for factory calibration only and should be used by factory personnel only. Other These displays show various parameters that should be accessed by factory personnel only. Larson Electronics, LLC 19 of 33 Phone: (877) 348-9680 Fax: (903) 498-3364 www.larsonelectronics.com...

  • Page 29: Status Information

    Frequency is less than the frequency trip setting by more than 2% of nom.  Phase rotation matches the specified phase rotation (only if enabled).  The phase unbalance is less than the unbalance pickup setting (only if enabled).  Larson Electronics, LLC 20 of 33 Phone: (877) 348-9680 Fax: (903) 498-3364 www.larsonelectronics.com...

  • Page 30: Display Messages And Their Meanings

    The load disconnect time delay is running. The amount TD Load Disconnect: Pages 28, 29 of time remaining is shown. (4ADTS, 7ADTS, 7ADTB) continued next page Larson Electronics, LLC 21 of 33 Phone: (877) 348-9680 Fax: (903) 498-3364 www.larsonelectronics.com...
  • Page 31 An internal memory error has been detected. On occurrence of this error message, memory is PARM CHCKSUM ERROR cleared and all parameters need to be reset. System error. UNKNOWN ERROR Larson Electronics, LLC 22 of 33 Phone: (877) 348-9680 Fax: (903) 498-3364 www.larsonelectronics.com...

  • Page 32: Description Of Operation

    If enabled, Feature 31M time delay will run after the transfer and the Feature 31 output will be active while the time delay runs. Larson Electronics, LLC 23 of 33 Phone: (877) 348-9680 Fax: (903) 498-3364...

  • Page 33: Open-Transition

    Feature 2E time delay. Feature 2E time delay provides an unloaded cooldown running period for the engine–generator. At the end of the time delay, the controller energizes the NR relay and the engine–generator is signaled to shutdown. Larson Electronics, LLC 24 of 33 Phone: (877) 348-9680 Fax: (903) 498-3364 www.larsonelectronics.com...

  • Page 34: Closed-Transition

    If enabled, Feature 31M time delay will run after the transfer and the Feature 31M output will be active while the time delay runs. Larson Electronics, LLC 25 of 33 Phone: (877) 348-9680 Fax: (903) 498-3364...
  • Page 35 It also deenergizes the ER and ER2 relays, energizes the SE and SE2 relays, and it locks out any further transfer operations. This lock–out condition is reset via the alarm reset. Larson Electronics, LLC 26 of 33 Phone: (877) 348-9680 Fax: (903) 498-3364 www.larsonelectronics.com...
  • Page 36 A pending closed–transition load transfer can be bypassed by using the Closed Transition Bypass switch. Depending upon the configuration of the controller, bypassing the closed–transition load transfer sequence will result in either an open or delayed– transition transfer. Larson Electronics, LLC 27 of 33 Phone: (877) 348-9680 Fax: (903) 498-3364 www.larsonelectronics.com...

  • Page 37: Delayed-Transition

    ER2 relay. The transfer switch CE coil energizes and closes the CE transfer switch main contacts. The transfer switch is now supplying the load from emergency source. Larson Electronics, LLC 28 of 33 Phone: (877) 348-9680 Fax: (903) 498-3364...
  • Page 38 Feature 2E time delay. Feature 2E time delay provides an unloaded cooldown running period for the engine–generator. At the end of the time delay, the controller energizes the NR relay and the engine–generator is signaled to shutdown Larson Electronics, LLC 29 of 33 Phone: (877) 348-9680 Fax: (903) 498-3364 www.larsonelectronics.com...

  • Page 39: Appendix

    (open, closed, delayed transition). These controls should only be NOTICE used by trained technicians familiar with their functions. Contact Larson Electronics for Observe precautions for assistance. handing electrostatic sensitive devices.

  • Page 40: Dip Switch Actuators

    Figure A–2. Location of DIP switch. Table B. Nominal Input Voltage — DIP actuators 3, 4, 5, & 6. Input Voltage to Controller switch actuator Larson Electronics, LLC 31 of 33 Phone: (877) 348-9680 Fax: (903) 498-3364 www.larsonelectronics.com...
  • Page 41 Table F. Lock Input — DIP actuator 10 1 Phase 3 Phase switch switch actuator actuator Table E. Emergency S. Phases — DIP actuator 9. 1 Phase 3 Phase switch actuator Larson Electronics, LLC 32 of 33 Phone: (877) 348-9680 Fax: (903) 498-3364 www.larsonelectronics.com...

  • Page 42: Voltage Jumper Blocks

    (115, 120, 208, 220, 230, 240, 277) (380, 400, 415, 440, 460, 480, 550, 575, 600) Position jumpers HORIZONTALLY Position jumpers VERTICALLY Figure A–4. Power supply jumper arrangements. Larson Electronics, LLC 33 of 33 Phone: (877) 348-9680 Fax: (903) 498-3364 www.larsonelectronics.com...

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