Installation, Operation and Service Manual
LKAT Plus EMC
© 2018 DynAmp, LLC
Page 12
047331 A
8. The measurement head is not grounded; however, the head cables should be
disconnected from the Metering Unit prior to installation or maintenance to minimize the
possibility of electrical shock.
9. When installing the Measuring Head, do not remove the seals from the exposed end of
the Measuring Head tube. Doing so may allow water or contaminants to enter the head,
and void IP rating and warranty.
10. Measuring Heads are shipped with mounting hardware
.
For permanent installation, the
head halves must be semi-permanently bonded around the bus bar using Silicone RTV
sealant (adhesive). After the bond cures, the spring-loaded mounting screws (plungers)
may require adjustment for appropriate position and spring force on the bus. Refer to
Outline & Mounting – LKAT Plus Measuring Head drawing.
Whenever possible, the head should be installed on the longest straight run of the bus that is
available in an area free of other bus structures. The status accuracy diagnostics LEDs and
relay contacts indicate proper operation in a given head location.
4.3
OFF-BUS FUNCTIONAL CHECK (OPTIONAL)
After unpacking the LKAT Plus system (but prior to installation) the following functional check
of the system is recommended:
1. Locate a convenient temporary power source for the LKAT Plus system. This may or may
not be in the location where the system will be installed. The power source must be in the
range 85 to 264Vac @ 47 to 440Hz, or 110 to 264Vdc for Standard AC/DC input power,
or +24Vdc for Special Order +24Vdc input power. The system draws a maximum of 30
volt-amperes.
2. Refer to the drawing “Wiring Diagram, LKAT Plus System” included at the end of this
manual. Attach a suitable connector to the unterminated end of the input power cable
assembly for connection to the power source to be used for this check.
3. Connect the Measuring Head cables A & B to the Metering Unit.
4. Connect the power input cable assembly to the Metering Unit and energize the unit.
5. Observe the LEDs on the Main pc board assembly. If the LEDs light green, the system is
functioning properly. If LED D6 (Accuracy Diagnostics “AD”) lights red, skip to
“Troubleshooting an Accuracy Diagnostics Fault Indication” in the “Theory of Operation”
section of this manual. If LED D5 (Trip 1) lights red, make measurements and complete
the form “LKAT Plus Diagnostic Measurements Form 1 – Zero Primary Current” and
contact the factory.
Refer to “Form 1, LKAT Plus Diagnostic Measurements Form – Zero Primary Current”. Allow
the system one hour to stabilize prior to making measurements. Make measurements and
record data shown on the form. File the completed test form for future reference. It is OK to
make these measurements away from location where the LKAT Plus system will be installed,
but this should be noted on the form
4.4
MEASURING HEAD INSTALLATION
The head halves are semi-permanently bonded together around the bus. The Measuring
Head is comprised of two “L” shaped halves. Each half is identified with a serial number
which must match followed by an “A” or “B”. One interconnection cable exits from each
corner box on each half.
When the Measuring Head is installed on a running (“horizontal”) bus, the head
interconnection cable assemblies should exit the corner enclosures on the bottom side of the