A-017
HYW3
Series Intelligent Universal Circuit Breaker
A
Primary power distribution
3.1.2 Function introduction
● Main protection functions (The functions of the controller have been set according to the requirements when leaving the factory. Please
contact our company if resetting is required)
Overload long-delay inverse time protection, short-circuit short-delay fixed time and inverse time protection, short-circuit instantaneous
protection, grounding or leakage current fixed time and inverse time protection, N-phase protection, current imbalance protection caused by
disconnection, load inverse time monitoring and other protection functions.
● Measurement and operation monitoring
Real-time measurement of various power grid operating parameters, such as frequency, power factor, and active power; real-time indication of
running status, such as fault status, alarm status, system self-diagnosis status, and normal running status.
● Inquiry
Running parameter inquiry, protection parameter setting value inquiry, historical fault record inquiry, self-diagnosis fault information inquiry and
power grid measurement parameter inquiry.
● Parameter setting
The following protection parameters can be directly set on the controller panel: Current value and time value of overload long-delay protection,
inverse time current value of short-circuit short-delay protection, fixed time current value and time value, current value of instantaneous
protection, current value and time value of load monitoring, set value of N-phase protection, current value, time value and inverse time
coefficient of grounding or residual current protection, imbalance rate and time value of current imbalance rate protection and harmonic
influence coefficient.
The following operations can also be performed on the controller panel: System clock calibration (only after this function is selected); setting all
the internal parameters of the system that can be set by the programmer (no programmer but the permission password is required).
● Programming interface
It provides the interface with the programmer to modify some specific parameters, such as function setting of output contacts, wiring mode of
voltage measurement, system clock, protection characteristic curve, thermal memory function, communication address, and communication
baud rate.
● Communication networking (this function is only available for Mic5.0 intelligent controllers)
The controller provides the standard RS485 interface, and can realize data transmission by Modbus or Profibus-DP or DeviceNet protocol, so as
to meet the requirements of telemetering, telesignaling, telecontrol and teleregulation of different monitoring systems.
● Test
The test functions are divided into two types: Instantaneous tripping simulation test and non-tripping simulation test:
(1) Instantaneous tripping simulation test: The tripping test of instantaneous operation of the circuit breaker can be carried out, and the inherent
operating time of the circuit breaker can be displayed after the operation.
(2) Non-tripping simulation test: The simulated test current is selected for the system non-tripping test. After the test is completed, the test
current, the system delay operating time under the test current and the fault category of the simulated test are alternately displayed.
● Self-diagnosis
It is used to diagnose and alarm some faults of the controller itself.
● Fault clock
It is used to record the time when the fault occurred. It can record the year, month, day, hour, minute and second of the fault occurred. (Up to 8
times can be recorded)
● Historical data record (optional)
It is used to record the four-phase current, three-phase voltage, frequency, power, power factor and active power, which can be recorded every
half hour for three months.
● Load monitoring protection
Load monitoring is used to control the different loads of the circuit breaker to ensure the power supply of the main load. Load monitoring can be
used for pre-alarm and branch load control. The controller can be programmed to output two passive signal contacts for load monitoring.
● MCR make-break and off-limit tripping (optional)
Make-break means that when the power grid is in a fault state before the circuit breaker is closed and the current greater than the MCR set
value is generated at the closing moment, the controller breaks the circuit breaker in an instantaneous way through the analog circuit. This
function only works at the closing moment (within 100 ms).
Off-limit tripping means that when the circuit breaker is in normal operation, and the short-circuit current exceeds a certain value (generally the
limit current of the circuit breaker), the controller breaks the circuit breaker in an instantaneous way through the analog circuit. This function is
not affected by the instantaneous set value.
● Communication protocol
It contains Modbus-RTU, which can be transferred to Profibus-DP or DeviceNet through an external module.