HPS' New Synchronizing Device SYR 2

Our New Synchronizing Device SYR 2 Can Do More Than Just Connect 2 Systems in Parallel.



The comfortable configuration of all settings of the SYR 2 is done by the parameterisation software 'Geräteverwaltung’ (GV 2). Alternatively, values can be entered directly at the device. Any access to the device`s parameterisation can be protected by a PIN. The output of display-texts at the device standardly takes place in German and English (switching between languages is possible at any time during operation).


Operating Modes:

The SYR 2 can be operated in 3 different operating modes:

  • Synchronizing
  • Island mode
  • Mains parallel mode

Individual parameter sets for regulating the frequency and voltage can be stored for each operating mode.



The SYR2 monitors voltage and frequency of the generators for compliance with the switching-on limit values. Only when all active values are adhered, the switching-on clearance is internally enabled.

Monitoring Functions:

The SYR2 features the option to activate various monitoring functions. The monitoring functions allow the downstream controller to check the compliance with the set limits, before giving the synchronisation clearance voltage and frequency. In addition to the limit values, the clearance as well as the SYN pulse can be monitored.


Switching on Dead Bus:

The SYR2 can be parameterised in a manner, that a switching on a so called dead bus, that is a not energised bus-bar, is possible. This function has to be activated separately. Normal synchronisation will still work unchanged if the dead bus is configured. If this function is activated, one of three different methods can be selected:


1. Generator to dead bus

The switching-on takes place to the not energised bus-bar of the leading mains (figured left).

The SYN pulse is output when the generator voltage lies within the set limits and the mains voltage is below the set limit value.

2. Transformer to dead bus

The switching-on takes place to the not energised bus-bar of the generator grid (figured left).

The SYN pulse is output when the values of the leading mains range within the adjusted limit values and the generator voltage (in this case transformer voltage) are below of the set limit values.

3. Bus to dead bus

The switching-on can be done as well to the not energised bus-bar of the leading mains, as to the not energised bus-bar of the generator grid, or if both bus bars are de-energized or voltage-carrying (then with synchronization).



Various independent controllers are available in the SYR 2 to regulate the voltage and frequency:

  • PID-T1 controllers that can be assigned to the two available analog outputs

  • Pulse controllers PFM and PWM, whose pulses can be assigned to the digital outputs (relays).

    PFM (constant pulse width; variable frequency)

    PWM (constant frequency; variable pulse width)


  • Electronic potentiometer, whose „outputs“ can be assigned to the available analog outputs.


Digital Inputs/Outputs with logic functions:

The SYR 2 features 3 digital inputs and 5 digital outputs, these can be assigned according to a function selection. Furthermore, there are 5 logic modules including 2 timers with which functions can be programmed.


Analog Outputs:

The SYR 2 has two 0-10 V / 2-10 V analog outputs, these can be freely parameterized via the function assignment, for example as controller outputs (PID / electronic potentiometer) or measured values ​​(frequency / voltage). The analog output 1 can be changed to a 0-20 mA / 4-20 mA current output via the device management GV-2.

The detailed device description can be found here: SYR 2 (Download Device Description)

If you have any questions about this device or about complete solutions, our technical sales team will be happy to assist you.

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