accuracy. The recommendation for the CT is a primary current equivalent to the
coil's maximum current and accuracy class 0.5S or better. The IRES signal is not
sufficient for the controller as it does not allow manual control of the coil if it is
disconnected from the network.
All voltage and current signals are measured using the value of the filtered
fundamental frequency component (DFT). Hence, the harmonics are always
suppressed.
Status information
The connection status (COIL_STS) information from the adjustable arc suppression
coil disconnector or circuit breaker should be wired to the controller. Also, fixed
parallel coil status (FIXCOIL_STS) and the parallel resistor status (RESISTOR_STS)
should be wired to the controller if they are present in the system. Inactive status
information signal means that the device is not connected and active status
information signal means that the device is connected.
Outputs
The following outputs should be considered in order to ensure correct operation of
the controller if a fixed parallel coil or parallel resistor is installed in the network:
• FIXCOIL, OP_FIXCOIL and CL_FIXCOIL: Status signal and corresponding open
and close command signals, with 100 ms fixed pulse length for controlling the
circuit breaker or disconnector of the fixed parallel coil. These signals are applied
if a fixed parallel coil is installed in the system.
• RESISTOR, OP_RESISTOR and CL_RESISTOR: Status signal and corresponding
open and close command signals, with 100 ms fixed pulse length for controlling
the contactor, circuit breaker or disconnector of the parallel resistor. These
signals are applied if a parallel resistor is installed in the system.
An example configuration of the connections is shown in
Figure 922
. Controller
inputs are indicated with red lines and outputs with green lines. This example shows
a simple, one-controller setup without the parallel resistor of the coil.
Figure 922: Example configuration of the controller connections
Control functions
1MRS759142 F
1732 REX640
Technical Manual
To Next Page
Loading...
