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TROUBLESHOOTING
Problem: STATUS LED does not blink.
Solution: Check fuses and voltage connections. STATUS LED should blink
regardless of CTs, N2 BUS connections and DIP switch setting.
Problem: Power meter interferes with another device on the N2 BUS .
Solution: Set DIP switches to a different N2 address which is not in use.
Problem: Readings seem highly inaccurate.
Solution: • Check that each CT is installed on the conductor with the
corresponding color voltage input lead attached. In most cases,
incorrect wiring will cause the STATUS LED to blink RED (slowly).
However, a Power Factor lower than 0.5 could cause the LED to
blink this way, even if the unit is installed properly.
• It does not matter which side of the CTs face towards the load.
• Check actual current with Amp clamp.
Expected power is:
kW = Volts x Amps x 1.732 x PF ÷ 1000
kW = Horsepower x .746
PF is usually 0.7 to 0.95 depending on the nature of the load.
• Compare this to the value read by AI-2
• If current is below 7% of full scale maximum for the CT, a
smaller CT should be used for very low currents. An alternative is to
wrap each wire through each CT multiple times
Problem: Meter off-line when load is switched off.
Solution: Voltage leads must be connected on the Line side of the
conductor. The power meter cannot communicate on the N2 BUS
without voltage.
Problem: STATUS LED blinks red.
Solution: • If the LED blinks quickly, approx. 5 blinks in 2 seconds, the CT
used is too small. A larger CT current rating is required.
• If the LED blinks slowly, approx. 1 blink in two seconds, the CTs
are not installed on the correct conductors, or the loads Power
Factor is less than 0.5. The meter can accurately measure these
low PFs, but few loads operate normally at such a low power factor.
SPECIFICATIONS
Specifications for H8025-xxxx-x Energy Transducer
Input primary voltage ..........................................................................................208 to 480 V AC
Number of phases monitored................................................................................... One or Three
Frequency....................................................................................................................... 50/60 Hz
Maximum primary current.............................................................. 2400 amps cont. per phase *
Internal isolation.....................................................................................................2000 VAC rms
Case insulation .................................................................................................................600 VAC
Temperature range ....................................................................................................... 0 to 60º C
Humidity range .................................................................................... 0 - 95 % non-condensing
Accuracy .................................................................................................... +/- 1.0 % (ANSI C12.1)
Output physical characteristics ........................................................RS 485, 2 wire plus common
Baud rate...............................................................................................................................9600
Protocol .................................................................................................................................... N2
Data for output.................................................................................... .AC–1: kWH, consumption
Current transformer
Specifications for H8026-xxxx-x Enhanced Data Stream
Input primary voltage ..........................................................................................208 to 480 V AC
Number of phases monitored .................................................................................. One or Three
Frequency....................................................................................................................... 50/60 Hz
Maximum primary current .................................... ......................to 2400 amps cont. per phase*
Internal isolation .....................................................................................................2000 VAC rms
Case insulation .................................................................................................................600 VAC
Temperature range ............................................... ........................................................0 to 60o C
Humidity range .................................................................................... 0 - 95 % non-condensing
Accuracy ................................................................ .................................... +/- 1.0 % (ANSI C12.1)
Output physical characteristics ............................................................ RS 485, 2 wire plus shield
Baud rate...............................................................................................................................9600
Protocol .................................................................................................................................... N2
Data for output .................................................................................... AC–1: kWH, consumption
*Current transformer ....Split core, 100, 300, 400, 800, 1600, 2400 amps
- 9 -
BO–1: Reset kWH
AI–1: kW, Real Power
Split core, 100 to 2400 amps
BO–1: Reset kWH
BO–2: Reset Min/Max/Avg
AI–1: kWH, Consumption
AI–2: kW, Real power
AI–3: VAR, Reactive power
AI–4: VA, Apparent power
AI–5: Power factor
AI–6: Average Real power
AI–7: Minimum Real power
AI–8: Maximum Real power
AI–9: Voltage, line to line
AI–10: Voltage, line to neutral
AI–11: Amps, Average current
AI–12: kW, Real power ØA
AI–13: kW, Real power ØB
AI–14: kW, Real power ØC
AI–15: Power factor ØA
AI–16: Power factor ØB
AI–17: Power factor ØC
AI–18: Voltage, ØA to ØB
AI–19: Voltage, ØB to ØC
AI–20: Voltage, ØA to ØC
AI–21: Voltage, ØA to Neutral
AI–22: Voltage, ØB to Neutral
AI–23: Voltage, ØC to Neutral
AI–24: Amps, Current ØA
AI–25: Amps, Current ØB
AI–26: Amps, Current ØC
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