Connections And Equipment - ABB SACE Emax E1.2 Operating Instructions For The Design Engineer

Connections and equipment Types of connection and compatibility
160 | © 2017 ABB | 1SDH001330R0002 - ECN000058721 Rev. A
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Within the monitoring period, the estimate of the energy consumed at the end of the period is performed by
the master at regular intervals. Then, after every interval:
• If the estimate is in the high consumption range, a load is disconnected (or a generator is connected)
• If the estimate is in the low consumption range, a load is connected (or a generator is disconnected)
• If the estimate is in the acceptable consumption range, no loads or generators are disconnected or connected.
Load monitoring is still performed by the master, in accordance with these rules:
• The maximum number of loads that can be controlled is 15 (including the generators).
• The order in which the loads are disconnected and connected depends on the priority level assigned: the
lower the priority level, the less important the load. Therefore a load with lower priority will be disconnected
before and connected after the one with higher priority.
• It is possible to assign the same priority level to different loads.
• If the same level of priority is assigned to more loads, the master will disconnect (connect) the load that
has been connected (disconnected) for the longest time.
• To avoid damage or due to operating requirements, it is possible that once a load has been disconnected
(connected) it can only be reconnected (disconnected) only after a certain minimum time (the minimum
times for which a load must remain disconnected and connected can be different). Furthermore, a load
cannot remain disconnected beyond a certain maximum time. This information can be inserted in the
master (separately for each load), and the master will disconnect (connect) each load only after its minimum
time has elapsed, and will reconnect before its maximum time has elapsed, regardless of its priority level.
• If a load to be disconnected is already disconnected (for example: due to tripping of a protection of a
supply-side trip unit, or manual opening), the load is classified as not available and is excluded by the
function until it becomes available again.
NOTE: in the text that follows, the term "load" is used for both real loads and generators.
The master monitors the loads, controlling the slaves remotely:
• Through wiring, and controlling also opening/closing coils or motor operators if the slaves are circuit-breakers.
• Using communication via Link Bus between Emax 2 trip units, or with Ekip Signalling 10K modules.
NOTE:
• Communication via Link Bus is possible only with Ekip Dip, LCD, and Touch trip units equipped
with an Ekip Link module. Then the circuit-breakers equipped with Ekip Dip trip units can only
act as slaves, while the circuit-breakers equipped with LCD or Touch trip units can act both as
masters and as slaves.
• For details on how to associate trip units connected to the same Link Bus with each other,
see the chapter "14 - Ekip Link module". For details on how to associate a trip unit and a 10K
module connected to the same Link Bus, see the manual
modules.
ABB | SACE Emax 2
1SDH001318r0002 of the 10K
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Specific applications | 2 - Load control