ABB REC 561 User Manual page 9

1MRK 580 146-XEN
Page 2 - 4
Introduction - REC 561
Single/double busbar, single breaker
This is the basic configuration with one, single-breaker bay per REC 561
and up to 14 high-voltage apparatuses. This configuration can have full
functionality for all options. REC 561 type 1 is used.
Fig. 1 Double busbar, single-breaker arrangement
Double busbar, double breaker
This configuration with one, double-breaker bay per REC 561 and up to
14 high-voltage apparatuses can also have full functionality for all options
except the breaker-failure protection, which can handle only one circuit
breaker and thus is not applicable in this configuration. To get the line
current, the currents through the circuit breakers are summed externally.
REC 561 type 1 is used.
Fig. 2 Double busbar, double-breaker arrangement
Breaker-and-a-half
In REC 561 type 2, control and interlocking functions for one diameter of
a 1½-breaker arrangement are included. As an option, the synchro-check
function for each circuit breaker, including the voltage selection, can also
be included. The voltages to be used for the synchro-check function are
based on one-phase values. If P, Q, f, and three-phase values of U and I
ABB Network Partner AB
1 U
1 U
REC
561
3 I
3 U
1 U
1 U
REC
561
3 I
3 U
Version 1.0-00
(X80146-1)
(X80146-2)