22P/22S STATIC SWITCH 1MS ELECTRONIC TRANSFER SWITCH

ISO 9001 CERTIFIED Standard Features ■ Electronic Static Transfer Switch for A31 Inverter for Inverter Prime (Accessory 22P) and/or Inverter Standby (Accessory 22S) applications (also field selectable). ■ Less than 1ms TransferTime for 1kVA to 15kVA models ■ Customer Calibration Mode Settings ■ Status Panel with (5) LED Indicator Lights and (2) Switches: ■ “Phase Lock” LED: Indicates when the Prime and Alternate Sources are Synchronized ■ “Utility Available” LED: Indicates the Alternate Source is Connected and Operating Within its Proper Range ■ “Inverter Available” LED: Indicates the Inverter is Operating Within its Proper Range ■ “Load on Preferred Source” LED: Indicates the AC Load is Operating on the Prime Source ■ “Load on Alternate Source” LED: Indicates the Load

Frequency 60.0Hz 50.0V/DIV 20.0ms/DIV indicates when transfer occurs. is on the Secondary Source ■ “Auto/Manual” Toggle Switch: Allows for an Scope photo shown above of typical Static Switch Transfer from Inverter Prime Source to Alternate Source upon loss of Inverter output Automatic or Manual Transfer ■ “Test Transfer” Pushbutton: Allows an Active Check 1MS ELECTRONIC STATIC SWITCH FOR of the Static Switch Operation LAMARCHE A31 DC TO AC INVERTER Static Switch Options The LaMarche Electronic Static Switch is an Automatic ■ Option #22A Alarm Relay Board consisting of device that will transfer an AC load to and from the Prime (2) sets of Form “C” Contacts for each of the following: Source to an Alternate Source, if the Prime Source fails, in ■ a rapid 1millisecond. The Static Transfer Switch is intended Phase Lock for use on the LaMarche A31 DC to AC Inverters ranging ■ Utility Available from 1kVA to 15kVA models (consult factory for other ■ Inverter Available applications). ■ Load on Prime Source ■ Load on Alternate Source Whether your Prime Source is established as your AC commercial line or the A31 Inverter, the Static Switch can be ■ Option #22D Digital Display (replacing AC calibrated for either Source at the factory or at your site. A analog meters on unit) to indicate the following: Customer Calibration mode is incorporated into the Static ■ Load Voltage Switch Menu to allow for on site parameter settings that are ■ Load Current best suited for the intended application. ■ VA (Volt-Amps) A Status Display Panel consisting of five LED indicator lights ■ Utility Voltage for Phase Lock, Utility Available, Inverter Available, Load on ■ Utility Frequency Preferred Source and Load on Alternate Source is provided ■ Inverter Voltage on the front panel for visual indication. Two switches, an ■ Inverter Frequency Auto/Manual Transfer toggle switch and a Test Transfer pushbutton, are also provided on the front panel for control operations. An optional Alarm Relay board consisting of (2) sets of A Digital Display Panel, which replaces the unit’s AC analog Form “C” contacts for Phase Lock, Utility Available, Inverter meters, is also offered as an option. The Digital Display will Available, Load on Prime Source and Load on Alternate allow the operator to view Load Voltage, Load Current, VA Source is available to remotely monitor the system’s (Volt-Amps), Utility Voltage, Utility Frequency, Inverter operating conditions. Voltage and Inverter Frequency readings.

LaMarche Manufacturing Company Made in USA 106 Bradrock Drive, Des Plaines, IL 60018-1967 Tel: 847-299-1188 Toll Free Fax: 1-888-232-9562 [email protected] www.lamarchemfg.com 22P/22S STATIC SWITCH 1MS ELECTRONIC TRANSFER SWITCH

Status Display A Status Display panel consisting of (5) LED indicator lights and (2) switches is provided on the front of the unit Phase Lock  Indicates when the Prime and Alternate sources are in synchronization Utility Available  Indicates the Alternate source is connected and operating within its proper range Inverter Available  Indicates the Inverter is operating within its proper range Load on Preferred Source  Indicates the AC load is operating on the Prime source Load on Alternate Source  Indicates the AC load is operating on the Secondary source  Auto/Manual Switch  Allows for an Automatic or Manual Transfer  Test Transfer Pushbutton  Allows an active check of the Static Switch operation

Operation The Electronic Static Switch is a Micro-Controlled Solid State Single Pole Double Throw (SPDT) Switch. The Switch controls which AC Power Source will energize a critical electrical system - the inverter or the utility power line. The determination of source power is based on selections of Prime (Preferred) Source and the percentage of allowable deviation in the Prime Source waveshape from a Sine- Wave reference. The load voltage is monitored with high-speed sensing which can cause a transfer of power source in less than 1 millisecond if the waveshape goes out of tolerance limits. The Hit Counter is used to determine the maximum allowable load voltage deviations outside of the pre-defined envelope that will trigger a transfer. The Switch will transfer when 3 consecutive measurements (Hit Counter default setting is 3 hits) are out of the specified envelope during a half cycle time frame. The waveform is sampled at 5- degree intervals from 20 to 160 degrees. The fastest transfer will occur after 3 consecutive hits. So for 60Hz, this would equal to .694 milliseconds and .833 milliseconds for 50Hz. Control for re-transfer to the Prime Source can be automatic or manual and is selected by a toggle switch on the unit front panel. A pushbutton switch to enable a test transfer to Alternate Source and a set of LED’s to indicate the Status of the load and the Power Sources is also on the front panel. The two switches and the set of LED’s are part of the Status Panel for the Static Switch. LED-1 will light to indicate “Phase-Locked”, meaning the Inverter Sine Wave phase is within the selected phase window width (error) from the utility Sine Wave phase. LED-2 will light when the utility line voltage is within the selected utility amplitude tolerance and LED- 3 will light when the Inverter is within the selected Inverter amplitude tolerance. LED-4 indicates when the load is being powered by the selected Preferred (Prime) Source and LED-5 when the load is powered by the Alternate (not Prime) Source.

Customer Calibration Mode The customer calibration mode allows the user to select the available parameters and to set per preferences.

SELECTIONS  SETTINGS 1. Preferred Source  May be selected to either Utility or Inverter 2. Load Voltage Window Upper Limit  Maximum voltage allowed on the Load 3. Load Voltage Window Lower Limit  Minimum voltage allowed on the Load 4. Utility Voltage Upper Limit  Maximum voltage allowed for Utility to be considered good 5. Utility Voltage Lower Limit  Minimum voltage allowed for Utility to be considered good 6. Inverter Voltage Upper Limit  Maximum voltage allowed for Inverter to be considered good 7. Inverter Voltage Lower Limit  Minimum voltage allowed for Inverter to be considered good 8. Inverter Sense Delay  The amount of time the Inverter must be within the upper and lower limits before the Inverter is considered within tolerance 9. Utility Sense Delay  The amount of time the Utility must be within the upper and lower limits before the Utility is considered within tolerance 10. Retransfer Delay  Used to set the time the Static Switch will attempt retransfer from the Alternate Source to the Primary Source 11. Hit Counter  Used to determine the maximum allowable load voltage deviations outside of the pre-defined envelope that will trigger a transfer

Specifications subject to change without notice ISO 9001 CERTIFIED

P25-DSSS-1 106 Bradrock Drive, Des Plaines, IL 60018-1967 ECN 15273 Tel: 847-299-1188 Toll Free Fax: 1-888-232-9562 03-02 [email protected] www.lamarchemfg.com