Standard Configuration B; Applications - ABB RELION 615 Series Applications Manual

Section 3
REV615 standard configurations
3.3
3.3.1
32

Standard configuration B

Applications

The standard configuration offers three phase overload protection, unbalance
protection with compensation for natural unbalance and switching resonance
protection for capacitor banks. An integrated undercurrent function in the overload
protection function block detects the disconnection of a capacitor bank and inhibits
the closing of the circuit breaker as long as the capacitor bank is still partially
discharged. A three-phase thermal overload protection is available and can be used for
the thermal protection of the reactors and resistors in the harmonic filter circuits.
The standard configuration B is pre-configured for double-Y connected capacitor
banks. A three-phase current unbalance protection is used for unbalance protection.
The second and third stage of the residual voltage protection in the standard
configuration B can be used as voltage based unbalance protection mainly for single
star-connected capacitor banks, with unearthed star point. A dedicated voltage input
Uob is used for this purpose. This functionality needs to be configured before it can
be taken into use.
The protection relay with a standard configuration is delivered from the factory with
default settings and parameters. The end-user flexibility for incoming, outgoing and
internal signal designation within the protection relay enables this configuration to be
further adapted to different primary circuit layouts and the related functionality needs
by modifying the internal functionality using PCM600.
1MRS758955 A
REV615
Application Manual