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C&S Electric Limited
Intelligent trip units
Today, Microprocessor based trip units has increased the scope of ACB function in any electrical system. With energy being the key both in terms of
its availability and also conservation, it is required that energy is saved to its maximum optimizing its use to maximum when needed. Such complex
present day requirement is easily achieved with use of sophisticated over current trip device fitted in ACB offering increasingly powerful functions. It
offers measurement of system parameters, store data, log various events, calculate required data, signal alarms with communication through
various modes and even take action to optimize the available energy in system etc. WiNmaster ACB equipped with Micrpro trip units offers both,
reliable protection and accurate measurement.
Intelligent release overview
Base
The base, as a function actuating part, is composed of the following parts.
Interlocking mechanism: when the actuator magnetic flux converter of release acts, it drives tripping lever to break the circuit breaker, keeps this
position and let the circuit breaker be unable to close before resetting of interlocking mechanism.
Resetting mechanism: it is a mechanical structure (reset button and its mechanism), after the magnetic flux converter operates and let the main
contact open, this resetting mechanism can reset the magnetic flux converter.
Magnetic flux converter: it produces a magnetic field after receiving the current from release circuit, to change the direction of magnetic line of
force, it induces the movable iron core that is under the action of reaction spring to run, which drives the tripping lever to open the circuit breaker
through interlocking mechanism.
Auxiliary contact of release
It determine the opening and closing position of two pairs of NO contacts according to the main contact state of circuit breaker. The other pair is of
changeover contacts, determine its working position according to the state of magnetic flux converter
Body case
In the body case, there is a basic circuit board of release, which receives various signals and sends out various commands according to the preset
functions and requirements after judgment, to finish the functions required by circuit breaker.
Sensor
The sensor is installed on the main circuit bus of circuit breaker, the neutral-line transformer may be installed separately at requests. The sensor
provides the energy and signal for the release. This sensor is different from the traditional transformer, it is made up of a rapidly saturable current
transformer that is used to provide the normal work energy for release and an air-core transformer that is used to provide current for circuit.
Magnitude of secondary current of air-core transformer is directly proportional to that of main circuit current. These two transformers are installed in
a round plastic box together.
Power supply accessories
There are many kinds of power supply accessories: the one installed on the base is used for release display and working state memory when the
main circuit of circuit breaker opens or current is very weak; power supply accessories installed on the drawer seat include AC power supply, DC
power supply, uninterrupted (battery) power supply and so on (used for full-intelligent type release), to guarantee the power supply for release and
relay accessories.
Relay
The relay, as a function extension of release, can be divided into two types: one is used to provide overload and short-circuit operation indication,
load monitoring operation command and indication, earthing fault indication, local fault indication and so on totally sixteen types of relay contact
output with different combinations for user according to the command of release. The other one is under control of computer, transmits various
parameters remotely and relay output providing various indications and operations with different combinations for user.
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ore options for different pplication and customer need
micro
pro2
quietly brilliant
The trip relay of WinMaster2 ACB provides the additional protection
function for voltage, frequency unbalance and others in addition to
main protection function for over current, short circuit, ground fault. It
supports the advanced measurement functions for voltage, current,
power, electric energy, harmonics, communication function and others
Analog trip function interlock with mechanism enhanced a durability of
devices as well as the breaking capacity of ACB
Zone selective interlocking function make the protective coordination
more simple and thermal memory can be applied to various loads
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C&S Electric Limited
W Nmaster 2
i
Summary of Contents for WiNmaster 2
Page 1: ...Air Circuit Breaker Ro S H Compliant W Nmaster 2 i 630A 3200A www cselectric co in ...
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Page 5: ...6 C S Electric Limited Complete Modular construction ...
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Page 36: ...Micropro 2 3 1 Micropro 2 4 1 37 C S Electric Limited Characteristics Curve W Nmaster2 i ...
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