Technical data

1MRS751108-MUM

REX 521

Protection Relay

Technical Reference Manual, General

A051902

Fig. 5.1.8.1.-1 High-speed double-pole power output (HSPO)

The high-speed power output HSPO1 can also be connected as a single-pole power

output where the object to be controlled (for example a circuit breaker) is electrically

connected in series with the two relay contacts, see the Fig. 5.1.8.1.-2 below.

A051903

Fig. 5.1.8.1.-2 High-speed single-pole power output (HSPO)

5.1.8.2. Single-pole power outputs (PO)

The single-pole power outputs PO1...3 are outputs where the object to be controlled

is connected in series with two heavy-duty output relay contacts, see the

Fig. 5.1.8.2.-1 below. These outputs can be used for tripping purposes and for circuit

breaker and disconnector control. Two singe-pole outputs may be used to obtain

another double-pole output.

A051904

Fig. 5.1.8.2.-1 Single-pole power outputs (PO1...3)

HSPO1

PO1...3