Universal Remote Control MX-880Z - SPECS SHEET Technical Information PDF herunterladen (Seite 32)

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Masterpact™ NT and NW Universal Power Circuit Breakers

Micrologic™ Electronic Trip Systems

05/2014

Waveforms may be displayed on the graphic screen of Micrologic H trip units or communicated over a

networked system. The recording takes place over one cycle with a measurement range of 0 to 1.5 I

for current and 0 to 690 volts for voltage. The resolution is 64 points per cycle.

Customized Alarm Programming

The instantaneous value of each measurement can be compared to user-set high and low thresholds.

Overrun of a threshold generates an alarm. Programmable action can be linked to each alarm, including

circuit breaker opening, activation of an M2C or M6C contact, recording of measurements in a log, etc.

Event Logs

Each event is recorded with:

•

The date, time, and name of the event.

•

The event characteristics.

Additional Technical Characteristics for Type P and Type H Trip Units

•

Setting the display language: System messages can be displayed in six different languages:

— English - US

— English - UK

— French

—German

— Spanish

— Italian

The desired language is selected via the keypad.

•

Protection functions: All current-based protection functions require no auxiliary source. Voltage-

based protection functions are connected to AC power via a voltage measurement input built into

the circuit breaker on the bottom side. (Optional external voltage measurement is available.)

•

Accuracy of measurements (including sensors):

— Voltage (V) 1%

— Current (A) 1.5% (higher accuracy [1%] may be achieved with special calibration on the current

transformer [CT characterization option])

— Frequency (Hz) 0.1 Hz

— Power (W) and energy (Wh) 2.5%

— The Micrologic H trip unit uses a dedicated metering data chain separate from the protection

data chain so that a greater number of data samples can be used for metering. This increases

the number of samples taken per time period, which in turn gives the H trip unit a higher degree

of metering accuracy.

•

Stored information: The fine setting adjustments, the last 100 events and the maintenance record

remain in the trip unit memory even when power is lost.

•

Reset: An individual reset, via the keypad or remotely, will reset alarms, minimum and maximum

data, peak values, counters and the indicators.

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