Studer Innotec RCC-03, RCC-02 user manual Configurations for auxiliary contacts 1 and 2 1201

Studer Innotec

Delay before passing to inverter {1198}

When the input voltage is below the transfer voltage to the inverter, the transfer relay does not open immediately. With this configuration, the period during which the transfer remains drawn can be specified. After this duration, the transfer relay is opened and the inverter function is activated (if the function has not been blocked or deactivated).

This delay is particularly useful on less stable grids or with generators with an output voltage that varies considerably during the activation of heavy loads.

Immediate transfer AC-In voltage {1200}

Use the adjustment of this configuration to adjust the critical voltage for the operation of equipment that must not experience interruptions. In the case of a fluctuating grid, if its voltage passes below the value of the configuration this immediately activates the inverter function, thereby ensuring supply to the consumers.

Activate immediate detection of grid outage (UPS) {1435}

This parameter allows to starting the inverter mode as quick as possible in case of fluctuations of the AC-In grid. This function is useful when it comes to very sensitive loads that require an uninterruptible power supply (UPS). If this function is active, being connected to a fluctuating source (weak grid or unstable generator) will lead to a frequent switching between inverter and charger modes by opening and closing of the transfer relay.

Authorisation for exceeding the power sharing current without interrupting the transfer {1436}

The parameter {1107} allows you to adapt the running of the Xtender to the maximum power of the source. In case this value is overrun, the transfer relay is not open and the circuit breaker on the source side may go on default. With this parameter you can force the transfer relay to open itself and the Xtender to work in inverter mode.

Use this function if you have available a source that is smaller than the Xtender and if you don’t use the function Smart-Boost. In this way, in case of overload of the source, all the power is supplied by the Xtender, up to its own limits.

Solsafe presence {1438}

This parameter allows the connection on the AC-Out side of an inverter for grid feeding. It also authorizes the Xtender to accept the energy coming from the output and to use it to charge the batteries.

Delay before closing of the transfer relay {1528}

This parameter enables to delay the closing of the transfer relay even if the AC-In voltage is present.

This function can be useful while working with gensets having a pre-warming delay.

Configurations for auxiliary contacts 1 and 2 {1201} {1310}

The Xtender inverter/charger is equipped with two auxiliary relays each with one free of potential contact (reverser). These two relays allow multiple functions to be carried out by using adequate cabling as well as simple programming.

The programming of each contact is carried out independently except when conditions require the use of two relays. In this case, the programmed events for activating the second relay are automatically deactivated.

The extended functions of the auxiliary contacts are described at the end of the chapter on simple functions.

The auxiliary contacts are activated immediately in response to the programmed signals. When the activation conditions are no longer fulfilled, they are deactivated with a delay of 2 seconds to avoid overswitching.

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