Dual Single-Pole High-Speed Power Outputs Hso1, Hso2 And Hso3 - ABB RELION 620 Series Technical Manual

1MRS757644 F
3.12.1.4
620 series
Technical Manual
GUID-968B105C-D7AA-4BFE-9BE8-89EE6DDE789E V2 EN
Figure 28: Signal/trip output contact SO3
The signal/trip output contact is included in the module RTD0002 located in slot X130
of the protection relay.

Dual single-pole high-speed power outputs HSO1, HSO2 and HSO3

HSO1, HSO2 and HSO3 are dual parallel connected, single-pole, normally open/form
A high-speed power outputs. The high-speed power output is a hybrid discrete and
electromechanical output that is rated as a power output.
The outputs are normally used in applications that require fast relay output contact
activation time to achieve fast opening of a breaker, such as, arc-protection or breaker
failure protection, where fast operation is required either to minimize fault effects to
the equipment or to avoid a fault to expand to a larger area. With the high-speed
outputs, the total time from the application to the relay output contact activation is 5...6
ms shorter than when using output contacts with conventional mechanical output
relays. The high-speed power outputs have a continuous rating of 6 A. When two of
HSO contacts are connected in series, the breaking rate is equal to that of output
contact PO1.
Section 3
Basic functions
109