UMG 507E demand controller

Peak demand management

up to 32 load shedding stages / 5 nominal values

Measurement period length: 

In order to be synchronised with the measurement of the power utility, resetting is undertaken through a digital input of the UMG 507Emax or through an interface. If the instrument is not reset within the programmed measurement period, it is reset automatically by the internal clock. When the measurement period is reset, the Emax effective power is deleted and a new measurement period is started. The last measured maximum effective power is used for storing the minimum and maximum values and, if programmed, is recorded in the UMG 507Emax memory. 

Off-time: 

This starts at the beginning of the measurement period and avoids brief power peaks at the beginning of the measurement period leading to shut down. 

Pause time: 

This is the time between two switching actions. Because switching actions do not have an immediate effect on the network, the delayed reaction can be regarded with the pause time. 

Involved consumers: 

Involved consumers are given priority for shutdown. Only involved consumers are included in the trend value calculation. This means that the Emax program tries to comply with the maximum demand by only using the “involved consumers” under consideration of the switching times and consumer power. If this is not possible, other consumers are also used for shutdown.

Priority:

Each shutdown level can be given priority between 0 and 32. Emax outputs with a priority of 0 are not included in the trend value calculation undertaken by the Emax program. Emax outputs with a low priority (e.g. 1) are shut down first and are last to be switched on again.

Connection load:

In order to be able to determine the time of shut down more accurately, the switched connection power of the connected load must be programmed for each Emax output. The switching times allocated to each Emax output are complied with on priority.

Minimum connection time:

This determines how long a consumer may remain switched off after shutdown.

Minimum disconnection time:

This determines how long a consumer must remain switched off after shutdown. 

Maximum disconnection time:

This determines how long a consumer must remain switched on between two switching actions.

Availability:

The availability of a consumer can be set as a percentage value.