Signal Output Contacts - ABB RELION SMU615 Technical Manual

Basic functions
HSO1
HSO2
HSO3
Figure 26: High-speed power outputs HSO1, HSO2 and HSO3
The reset time of the high-speed output contacts is longer than that of the
conventional output contacts.
High-speed power contacts are part of the card BIO0007 with eight binary inputs
and three HSOs.
3.9.2

Signal output contacts

Signal output contacts are single-pole, single (normally open/form A or change-
over/form C) signal output contacts (SO1, SO2,...) or parallel connected dual
contacts.
The signal output contacts are used for energizing, for example, external low burden
trip relays, auxiliary relays, annunciators and LEDs.
A single signal contact is rated for a continuous current of 5 A. It has a make and
carry for 0.5 seconds at 15 A.
When two contacts are connected in parallel, the relay is of a different design. It has
the make and carry rating of 30 A for 0.5 seconds. This can be applied for energizing
breaker close coil and tripping coil. Due to the limited breaking capacity, a breaker
auxiliary contact can be required to break the circuit.
3.9.2.1 Internal fault signal output IRF
The internal fault signal output (change-over/form C) IRF is a single contact
included in the power supply module of the merging unit.
66
X110
15
16
19
20
23
24
1MRS758407 C
SMU615
Technical Manual