Studer Innotec RCC-02, RCC-03 Configurations for auxiliary contacts 1 and 2 {1201} {1310}

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.

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.

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.

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.

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.

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.