C&S Electronics WiNmaster 2, Manual

Page: 26 / 61

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LCD display
Reset key
Warn / alarm LED
LED Healthy
Communication Indication
Information Key
Protection setting Key
Enter Key
Series name
Test port
Corporation Logo
Exit Key
Upward Key
Downward Key
Measure Key
Basic setting Key
Tripping characteristics curve
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RESET RESET
Warn/Alarm Warn/Alarm
Healthy Healthy
Comm. Comm.
lg lg
lr lr
ls ls
lsd lsd
lili
TEST
micro 7.1 pro2
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Protection settings
Protection thresholds and delays are set using the keypad buttons or the
communication software. The selected values are momentarily displayed on the
display.
Overload protection
True RMS long-time protection
Multiple ranges of Protection Curves for the co-ordination from inductive load to
high voltage fuse: SI, VI, EI (G), EI (M), HV, and I2T.
Multiple selection of Thermal memory: thermal image before & after tripping.
The long-time setting “OFF” enables to cancel the overload protection.
Short-circuit protection
Short-time (RMS) and instantaneous protection.
Selection of Fixed Time Delay & Inverse Trip Current type, (ON or OFF) for delay.
Zone Selectivity Interlock.
Neutral protection
In Practice, cable & current characteristics of the neutral phase is very different from
that of the other three phases. Micropro 2 7.1 take different protection measures
according to different application needs. When the cable is relatively thin, half the set
value can be used, and when the cable is normal, the set value can be used. When the
mains harmonics are relatively big, double value.
Earth fault protection
Earth fault protection is definite type curve setting, which ensure the more reliability
Setting “OFF” enables, to cancel the earth fault protection
Earth fault Zone selective Interlocking
Earth Leakage Protection
This function is to prevent the leakage damage caused by insulation failure of the
equipment. The unit of the tripping value is ampere and is irrelevant with the rated
current of breaker. For Zero sequence signals adapting a rectangle mutual inductor is
needed for better precision and sensitivity in the protection of small current.
Additional Protection & Alarm
The Micropro 2 7.1 can be set for the Air Circuit Breaker tripping provides the
protection against the following parameters.
Over & under voltage
Voltage Unbalance
Over & Under frequency
Current unbalance
Reverse Power
Phase sequence
Maximum required value protection
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Micropro 2 - 7.1
27 C&S Electric Limited
Intelligent Release
W Nmaster 2 i