HUW1
Series Intelligent Universal Circuit Breaker
19
2.
When the location of the short circuit or ground fault is between the superior circuit breaker (1# circuit
breaker) and the subordinate circuit breaker (2#
–
4# circuit breaker), such as location
①
, the superior circuit breaker
does not receive the regional interlock signal. Therefore, it trips instantly and quickly cuts off the faulty line.
I/O port setting requirements of the circuit breaker: At least one DI of the superior circuit breaker is set as the
regional interlock detection; and at least one DO of the subordinate circuit breaker is set as the regional interlock
signal output.
6.4.22
Reclosing
The reclosing function means that the circuit breaker is disconnected due to undervoltage or power failure under
non-fault conditions; and when the power supply system returns to normal, the product will automatically close to
keep the power supply. The circuit breaker is suitable for places that are not easy to maintain, and can be used in
lightning-prone areas or power grids with unstable power supply to prevent the circuit breaker from tripping due to
short-time voltage drop, based on the protection caused by abnormal line voltage.
6.4.23
Communication
Through the communication interface, the intelligent controller can realize data transmission functions such as
telemetering, telecontrol, teleregulation and telesignaling according to the specified protocol. The output of the
communication interface adopts photoelectric isolation, which is suitable for the environment where strong
electromagnetic interferences.
Communication protocol
Modbus-RTU
Profibus-DP
DeviceNet
Communication address
0
–255
3
–126
0
–63
Transmission rate (bit/s)
9.6k, 19.2k
Self-adaption
125k, 250k, 500k
Communication module
Internal
External
Network
function
Telemetering
Remote real-time monitoring of the current, voltage, fundamental current, fundamental voltage, power,
power factor, electrical energy, frequency, harmonic content for current and voltage, total harmonic
distortion of voltage and current, etc.
Teleregulation
Remote reading and modification for protection parameters
Telecontrol
Remote control of opening/closing of the circuit breaker
Telesignaling
Alarm, fault trip, stored energy signal, undervoltage, breaker body position, closing readiness,
opening/closing position and other indicators of the breaker status.
Main busbar
Control line
Main busbar
Control line
Main busbar
Region 3
Region 2
Region 1
Superior circuit
breaker
Subordinate
circuit breaker