ABB SB512 After sales service is provided for the control card of the power supply device

Description

Packaging details: if you need an urgent delivery order, please feel free to contact us, and we will do our best to meet your needs.

Price problem: if you find that other suppliers offer cheaper prices for the same product, we are also willing to provide you with reference prices and give you further discounts.

Directional overcurrent (D – ANSI 67): the protection is able to recognize the direction of the current
during the fault period and thus detect if the fault is upstream or downstream of the circuit-breaker. The
protection, with fixed time trip curve (t=k), intervenes with two different time delays (t7bw and t7fw),
according to the current direction. In ring distribution systems, this enables the distribution portion to be
identified in which the fault occurred and to disconnect it while maintaining the operation of the rest of the
installation.
Zone selectivity for protection D (ANSI 68): enables the possibility to connect circuit-breakers among
them, that in case of fault rapidly isolate the fault area, disconnecting the installation only at the level
nearest to the fault, maintaining the operation of the rest of the installation. The function is particularly
useful in ring and grid installations where, in addition to the zone, it is also essential to define the
flow direction of the power that supplies the fault. It is possible to enable directional zone selectivity
alternatively to the zone selectivity of the protections S and G, and in the presence of an auxiliary supply.
Start-up function for protection D: enables higher trip thresholds to be set at the outgoing point, as
available for protections S, I and G.
Second protection against undervoltage and overvoltage (UV2 and OV2 – ANSI 27 and 59): enables
two minimum and maximum voltage thresholds to be set with different delays in order to be able to
discriminate, for example, between voltage dip transients due to the start-up of a motor and an actual fault.
Second protection against underfrequency and overfrequency (UF2 and OF2 – ANSI 87L and 87H):
enables two minimum and maximum frequency thresholds to be set simultaneously. For example, only an
alarm can be set to be tripped when the first threshold is reached, and the circuit-breaker can be set to
be opened when the second threshold is reached.
Dual setting of protections: Ekip Hi-Touch can store a set of alternative parameters for all protections.
This second series (set B) can replace, if necessary, the default series (set A) by an external control.
The control can be given when the network configuration is edited, for example when an emergency
source is activated in the system, changing the load capacity and the short-circuit levels. Another typical
application is protecting the operator opposite the switchgear against the electric arc. In this case,
protection delays are minimized to safeguard the operator (Set A), whereas in the absence of an operator
the protections are set to ensure selectivity with the circuit-breakers downstream (Set B). It is possible to
activate series B by:
– Digital input available with an Ekip Signalling module;
– Communication network, by means of one of the Ekip Com communication modules;
– Directly from the Ekip Hi-Touch display;
– By a settable internal time, after the circuit-breaker has closed.