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

1MAC504801-IB E
3.10.1.4
620 series ANSI
Technical Manual
SO3/
TO1
TCS1
GUID-45757AEE-759A-49AD-AA92-6E54CDEE6CB8 V1 EN
Figure 24: Signal/trip output contact SO3/TO1
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
X130
16
17
93