Table of Contents
Advertisement
Functions
2.2 Automatic reclosure function (optional)
Figure 2-9
If, however, the internal automatic reclose function is controlled by the pickup, the phase-dedicated pickup
signals of the external protection must be connected if distinction shall be made between different types of fault.
The general trip command then suffices for tripping (FNo. 2746). Figure 2-10 shows a connection example.
Figure 2-10
2 Protection Relays with 2 Automatic Reclosure Circuits
If redundant protection is provided for a line and each protection operates with its own automatic reclosure func-
tion, a certain signal exchange between the two combinations is necessary. The connection example in Figure
2-11 shows the necessary cross-connections.
If phase segregated auxiliary contacts of the circuit breaker are connected, a three-pole coupling by the 7VK61
is ensured when more than one CB pole is tripped. This requires activation of the forced three-pole trip (see
54
Connection example with external protection device for 3-pole reclosure; AR control mode =
with TRIP
Connection example with external protection device for fault detection dependent dead time —
dead time control by pickup signals of the protection device; AR control mode = with PICKUP
SIPROTEC, 7VK61, Manual
C53000-G1176-C159-3, Release date 05.2009
Advertisement
Table of Contents
