Signal Output Contacts; Internal Fault Signal Output Irf - ABB 615 series Technical Manual

1MAC059074-MB A
3.12.2
3.12.2.1
615 series ANSI
Technical Manual
HSO1
HSO2
HSO3
GUID-38EDD366-7456-4933-B49E-0F43FE1D6C39 V1 EN
Figure 25: 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. They are optional alternatives to conventional BIO cards of the protection relay.

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.

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 protection relay.
X110
15
16
19
20
23
24
Section 3
Basic functions
111