libra-3k electronic polyphase meter handbook - ABE Technologies
libra-3k electronic polyphase meter handbook - ABE Technologies
libra-3k electronic polyphase meter handbook - ABE Technologies
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OKRW2.702.303SS, Libra-3K Poly-phase Meter Handbook v1.0<br />
Appendix A: Product Specifications<br />
Item Specifications Others<br />
Power<br />
Voltage Rating: 120V to 480V<br />
Operating Voltage: 96V to 528V<br />
Requirements<br />
Current: 0 to class amperes<br />
Operating Range: ±3Hz<br />
Frequency: 60Hz,50Hz<br />
Operating<br />
Temperature: -40°to +85℃<br />
Inside <strong>meter</strong> cover<br />
Environment<br />
Humidity:0%~95% non-condensing<br />
Transient<br />
ANSI C37.90.1-1989<br />
2.5kV, 2500 strikes<br />
/Surge<br />
IEC 61000-4-4<br />
4kV, 2.5 kHz repetitive burst for<br />
Suppression<br />
1min<br />
ANSI C62.41<br />
6kV at 1.2/50 us, 10 strikes<br />
Accuracy<br />
ANSI C12.20 - 0.2 Accuracy Class<br />
LCD Display<br />
Six-digit Liquid Crystal Display<br />
Annunciator Height: 0.088”<br />
Data Digit Height: 0.4”<br />
Electronic Load Indicator<br />
Primary<br />
Power line frequency (50 Hz or 60 Hz), with selectable crystal oscillator<br />
time base<br />
Secondary<br />
Meets the ANSI limit of 0.02 % using the 32.768 kHz crystal. Initial<br />
Time base<br />
performance is expected to be equal to or better than ±55 seconds per<br />
month at room temperature<br />
OPERATING INSTRUCTIONS 34 / 35
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