6
Before You Begin
D
ANGER
During normal operation of the meter, hazardous voltages are present which
can cause severe injury or death. These voltages are present on the terminal
strips of the device and throughout the connected potential transformer (PT),
current transformer (CT), status input, relay, and control power circuits. Only
qualified, properly trained personnel should perform installation and
servicing.
Before performing any service on the meter:
Familiarize yourself with the steps in this guide.
Read the safety precautions on the “Service Considerations” page.
Complete the following steps before attempting any retrofits.
1.
Turn off ALL power to the meter.
2.
Open all PT fuses (or direct voltage input fuses).
3.
Close all CT shorting blocks.
4.
Ensure that all cables still connected to the meter are NOT live.
C
AUTION
The components inside the meter are extremely sensitive to electrostatic
discharge. To prevent damage to the unit, wear an anti-static wrist strap at
all times when working inside the unit. Failure to use proper equipment
during servicing will void the ION 7700 meter’s warranty.
Recommended Tools
Phillips screwdriver
Flat-head screwdriver
Adjustable wrench or socket wrench set
Wire cutter
Anti-static wrist strap or similar protection