ABB SA801F After sales service is provided for the control card of the power supply device

Description

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Voltage unbalance (VU – ANSI 47): with constant trip time (t = k), protects against an unbalance
between the voltages of the individual phases that are protected by the circuit-breaker.
Residual current (Rc – ANSI 64 & 50NDT): with constant temperature (t=k) protects against indirect
contacts and is integrated into Ekip Touch by a dedicated residual current rating plug and external toroid.
The protection is an alternative to the functions G and Gext.
Reverse active power (RP – ANSI 32R): with constant trip time (t = k), function is tripped when total
active power – in the opposite direction of the current – exceeds the set threshold.
In addition to the protection functions, the following indication and control functions are available to
warn the user that a given condition has been reached. The active indications are always shown on the
display and are also available by communication on the system bus (with Ekip Com modules) or electrical
indication (with Ekip Signalling modules).
Synchrocheck (SC – ANSI 25): the synchronism control function compares the voltages in the module,
the frequency and phase of the two circuits to which the circuit-breaker is connected. Ekip Touch
indicates that conditions have been reached that enable the two lines to be made parallel. The function is
available with two work modes:
– In systems with both busbars supplied, where synchronism is determined by:
1. voltage of the two half-busbars above the Ulive threshold for the set time
2. difference of the module of the two voltages below the threshold ‘U
3. difference of the frequency of the two voltages below the threshold ‘f
4. difference of the phase of the two voltages below the threshold ‘
5. desirable time for synchronism condition tsyn
6. circuit-breaker open
– In systems with an out-of-service line (dead busbar), where the synchronism condition is determined by
the concurrence of the following conditions for the tref set time:
1. voltage of the active half-busbar above threshold Ulive
2. voltage of the dead half-busbar below threshold Udead
3. circuit-breaker open
In both cases, synchronism consent is withdrawn when one of the above conditions is missing and it has not
been less than 200ms from the change of the circuit-breaker condition (when the relationship has been set).
The indication of reached synchronism is available directly as an electrical indication via a contact that is always
supplied with the module. The function can be activated simply by connecting the Ekip Synchrocheck module to
any Ekip Touch provided with an Ekip Measuring Pro module.
Cyclical direction of the phases (ANSI 47): indicates an alarm through inversion of the phases sequence.
Power factor (ANSI 78): available with a three-phase threshold, warns when the system operates with a
power factor that is less than the set power factor.