Automatic transfer switch system

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Automatic transfer switch system

Automatic transfer switch system

   
 
Description Specification Configurator Accessories Connected
PRODUCT MANAGER
Grzegorz Bartusiak bartusiak@zpas.pl +48 74 872 0691 +48 609 449 924


Automatic transfer switch (ATS) devices are used to increase supply reliability for important takeoffs. Their task is to detect excessive decrease or loss of the primary power supply voltage and switch to backup power. There are ATS systems with overt and covert backup. I n ATS systems with overt backup, after detecting primary power failure, reserve power switch is turned on, whereas in systems with covert backup, breaker switch of the coupler.

In terms of ATS operation time, one can distinguish:

  • slow ATS devices with a sufficiently long time of operation (above 0.4 s) to suppress residual voltage of rundown motors,
  • fast ATS devices with a sufficiently short time (below 0,25 s) to prevent too large difference between vectors of the mains voltage and residual voltage.

There is short ATS cycle when excitation takes place from the moment of opening the primary power switch, and full ATS cycle when excitation takes place from the moment of voltage loss for the primary power supply. ATS devices are usually installed in auxiliaries networks of utility power plants and industrial power plants, industrial switchrooms that power important takeoffs, as well as in power grid switchrooms.

 

OUR PROPOSALS

Controller-based ATS systems

We also offer you controller-based ATS systems. We use controllers of most companies present on the market. ATS system status is visualised on control panels, matrix panels and on panels lined on the switchgear door. I n the controller version, the ATS system can perform any type of ATS and any switching scenario. Acting on the ATS system status can be performed using switches located on the switchgear door, as well as the touch control panel.

Przykład sterownikowego układu SZR z panelem dotykowym, mozaikowym i wyklejanym


ATS systems based on dedicated control panels

We also offer you precise ATS systems based on dedicated control panels for specific cases, network-to-network, network-to-generator, etc. These panels are designed for installations where power reliability is essential. These panels have high measurement accuracy and are highly reliable.

Układ SZR dla wielu dopływów, oparty o panele sterownicze firmy Energotest-Energopomiar,
wykonany dla stacji energetycznej Wielopole Układ SZR dla wielu dopływów, oparty o panele sterownicze firmy Energotest-Energopomiar,
wykonany dla stacji energetycznej Wielopole


Relay-based ATS systems

We offer you slow relay-based ATS systems in network-tonetwork version in overt or covert backup configuration, and a network-to-generator for overt backup. Our ATS system can control both contactors and circuit breakers equipped with motor drives, and can be supplied with or without them.

Installing the system is possible in two variants:

  • on the mounting plate (e.g. in SWN cabinet made by ZPAS or in any switchgear that has enough space on the plate),
  • on 19" frame using a PS-3U panel made by ZPAS.

The systems provide for signalling the presence of voltage across individual power lines and signalling current power line that is supplying takeoffs. Supply is switched from the primary power supply to the backup and then returns to the primary one, once the set delay time has elapsed. The delay is set separately for backup switching and return switching. Switching to backup network or power generator supply is triggered by voltage loss in the primary network or voltage asymmetry in at least one phase of the primary network. For the network-to-generator configuration, also U PS is provided to power the devices that control the ATS system in the event of voltage loss in the primary power supply (in the version where the system is integrated with the PS-3U panel, U PS is not installed inside the panel).

Układ przekaźnikowy SZR zamontowany w szafie


Attribute Value
Catalogue number 3732


Page ID: 3732