4
5
TROUBLESHOOTING
Problem: STATUS LED does not blink.
Solution: Check fuses and voltage connections. STATUS LED should blink
regardless of CTs, pulse output connections and DIP switch setting.
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.
• 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 and divide the output reading
by the number of turns through the CT window.
• If using a single-phase CT model 8051, ensure that all 3 phases are
passing approximately the same current by testing each phase with
an amp-clamp. If phases are unbalanced, you should use the model
8053.
SPECIFICATIONS
Input primary voltage ................................................... 208 to 480 V AC
Input frequency............................................................. 47-70 Hz.
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 % (H8053-ANSI C12.1)†
Current transformer ...................................................... Split core, 100 to 2400 amps
Pulse output type ......................................................... Normally open Opto-Fet
Maximum output current.............................................. 100mA@24VAC/DC
Pulse width.................................................................... 200msec
* Larger sizes available, consult factory
† Meter accuracy specified with conductors centered in CT window
PULSE-RATE SELECTION SWITCHES
FIGURE 4
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 without voltage.
Problem: STATUS LED blinks red.
Solution: • If the LED blinks quickly, approximately 5 blinks in 2 seconds, either
the pulse-rate switch settings are incorrect OR the CT used is too
small. First check the switch settings. Ensure that an incorrect setting
has not been selected by comparison to Figure 4. Note that some
settings are not available on some models. If switch settings are OK,
then the CT used is too small. A CT with a larger current rating is
required.
• If the LED blinks slowly, approximately. 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.
kWh/pulse
0.1 KWH PER PULSE
Not allowed on 1600A
and 2400A models
0.10
0.25
0.50
1.00
kWh/pulse
0.25 KWH PER PULSE
Not allowed on
2400A model
0.10
0.25
0.50
1.00
kWh/pulse
0.50 KWH PER PULSE
All models
0.10
0.25
0.50
1.00
kWh/pulse
1 KWH PER PULSE
All models
0.10
0.25
0.50
1.00