Figure 38: Signal/trip output contact SO3
The signal/trip output contact is included in the module RTD0002 located in slot
X130 of the protection relay.
3.12.1.4 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.
20
23
16
19
24
15
X110
HSO3
HSO2
HSO1
Figure 39: 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.
Basic functions
1MRS757644 H
116 620 series
Technical Manual
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