Siemens SENTRON 3WA1 - Monitoring and ZSI Test Function; Parameterization

Description
2.10 Zone-selective interlocking ZSI
3WA1 air circuit breaker
Equipment Manual, 02/2023, 92310000002-06
189
2.10.3 Monitoring and ZSI test function
Monitoring function
When the external voltage supply (24 V DC) is activated, any existing module on the
CubicleBUS² is automatically registered. The ETU600 electronic trip unit then
permanently monitors the presence of the registered modules and reports an error if a
registered module is no longer detected.
For the ZSI200 module, a nonvolatile test can be activated that checks whether the
module is present as the ETU600 is starting. In this case, the ETU600 checks during its
activation whether a ZSI200 module is present on the CubicleBUS
2
. If the ZSI200 module
is not detected when the ETU600 is activated, this is reported as an error.
The ZSI200 module monitors the ZSI control lines for short-circuits.
Detected errors are signaled, see Chapter Display of errors and alarms (Page 181).
Test function
The wiring of the ZSI system can be checked with the "ZSI Test" function on the
ETU600.
This test function can be used to send a permanent control signal at the ZSI interfaces
port A and port B and to check the reception of a control signal.
2.10.4 Parameterization
The settings for the ZSI system required for the circuit breaker can be set via the display
and the operating keys of the ETU600, or with the help of the SENTRON powerconfig
configuration software via Bluetooth or communication.
For the ZSI function, the delays t
ZSI
and the sending as well as receiving of the control
signal must be parameterized.
The following settings are possible:
Setting
Comment
ZSI ST
ZSI IN
Evaluates an incoming control signal for the short-time-delayed short-
circuit protection ST (can be switched on/off)
ZSI OUT
When the short-time-delayed short-circuit protection ST is triggered, a
control signal is sent (can be switched on/off)
t
ZSI
Delay t
ZSI
for short-time-delayed short-circuit protection ST
Setting range 0.04 s … 0.4 s
ZSI GF
ZSI IN
Evaluates an incoming control signal for the ground-fault protection GF
(can be switched on/off)
ZSI OUT
When the ground-fault protection GF is triggered, a control signal is sent
(can be switched on/off)
t
ZSI
Delay t
ZSI
for ground-fault protection GF
Setting range 0.04 s … 0.4 s
Monitoring
Monitoring of the ZSI200 module in the startup phase (can be switched
on/off)
Switching monitoring on and off is only possible via the SENTRON
powerconfig configuration software.