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Connecting the Base Unit's Chassis Ground Connection
'
%98-32
Failure to properly connect
the 9700 Power Meter's
chassis ground will void the
unit's warranty.
Connecting the Base Unit's Power Supply
2
38)
Do not power the 9700
Power Meter from the
voltage source it is
monitoring if the frequency
is less than 50 Hz. Use a
dedicated power supply
that conforms to the power
supply specifications listed
in the Technical
Specification section of the
9700 Power Meter
Operation Manual .
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The
terminal of the 9700 Power Meter provides the chassis ground
connection. A good, low impedance chassis ground connection is essential
for the 9700 Power Meter surge and transient protection circuitry to function
effectively. It should be made to the switchgear earth ground using a
dedicated AWG 14 (2.5 mm
voltage error due to distribution voltage drops. Do not rely on metal door
hinges as a ground path. Ensure that the
down securely onto the ground wire.
The 9700 Power Meter can be powered either from the voltage source it is
monitoring, or from an independent supply (note that the P24/48 option
must be powered from a dedicated fused feed). The 9700 Power Meter
requires a constant power supply to maintain monitoring, analysis, data
logging, control and communications operations. Powering the device from
the voltage source it is monitoring is not suitable for applications where
these operations must be maintained in the event of a power outage.
If the 9700 Power Meter is used to perform control functions or monitor
power quality and power disruption events, an uninterruptable power
supply (UPS) should be used to ensure constant supply power.
P240 (Basic) Model
The basic model can be powered from a dedicated feed, or from the voltage
source it is monitoring, as long as it is within the supply range. The basic
model has a nominal power supply range of 100 to 240 VAC, but will
operate correctly from 85 VAC up to 264 VAC. Applying power above 264
VAC can cause permanent damage to the power supply. The unit can also
be powered by 110 to 300 VDC. Supply current can be as high as 1 Amp (56
W), dependent on whether an MGT unit and/or one or more external I/O
expansion boards have been connected.
If an AC power supply is being used, connect the line supply wire to the
9700 Power Meter L/+ terminal and the neutral supply wire to the N/-
terminal. If a DC power supply is being used, connect the positive supply
wire to the 9700 Power Meter L/+ terminal and the negative (ground) supply
wire to the N/- terminal.
P24/48 Option
The P24/48 option must be powered from a dedicated fused feed. This
option can be powered by 20 to 60 VDC. Supply current can be as high as
1.5 Amp (30 W), dependent on whether an MGT unit and/or one or more
external I/O expansion boards have been connected. The label on the 9700
Power Meter indicates if the unit is equipped with this option.
Connect the positive supply wire to the 9700 Power Meter + terminal and the
negative (ground) supply wire to the - terminal.
2
) or larger wire to a point where there will be no
terminal screw is tightened
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