Effective October, 2000
Page 25
WARNING
3.
For 810 and 910 Kits Only.
Without any power applied to the system
(neither the 120 volt power supply nor the
Aux. Power Module connected), plug the
External Harness into the Cell Harness and
check the impedance between COM 1 and
COM 2. The impedance should be between 1
and 3 ohms. If the impedance is not within
this range, trace the wiring and examine
each connection to assure its integrity.
Confirm that the IMPACC communicating
wiring is correct by following the procedures
detailed in Section 7.4 of the Instructions for
the Application of Digitrip RMS Retrofit Kits
on Power Circuit Breakers. Note that for 810
and 910 Kits, the impedance between COM 1
and COM 2 should be between 1 and 3
ohms.
When the test is complete, disconnect the
External Harness from the Cell Harness.
Final External Harness Connection will be
performed in Section 13.
For Kits Supplied with a Cell Harness Only.
Step 13: Mounting the Cell Harness
A. The Cell Harness is to be mounted in the
Breaker Cell. The connector end is to be
mounted on the right front side of the Cell, in a
location suitable for connection with the
External Harness. The Terminal Blocks can be
mounted anywhere space is available in the
Cell as long as connection to the External
Harness can be made.
B. Route the Cell Harness wiring to keep it away
from any moveable parts within the Cell
Housing.
Step 14: Installing the Retrofitted Breaker in
the Cell
Do not leave the Breaker in an intermediate
position in the Switchgear Cell. Always leave
it in the CONNECTED, DISCONNECTED, or
(Optional) TEST position. Failure to do so could
lead to improper positioning of the Breaker
and flashover, causing death, serious personal
injury, and / or property damage.
NOTE: It is the responsibility of the Retrofitter
to insure proper Breaker / Cell fit. When
racking the Breaker into the Connected
position, the Retrofitter MUST FOLLOW BOTH
the manufacturer’s instructions and the
customer’s safety standards and procedures
for racking a Breaker into the Connected
position.
A. With the Breaker in the Open position and the
springs discharged, slowly rack the Breaker into
the Connected position, making sure there is no
interference or binding. The Breaker should rack
smoothly and without mechanical interference
between any Breaker and Cell parts. The
Retrofitter will feel some resistance when the
primary fingers connect onto the stabs of the
Cell. This is normal.
However, if any unusual resistance is detected
that could be abnormal interference between
the Breaker and Cell parts, stop immediately
and move the Breaker out of the Connected
position. Examine what is causing the
interference and correct the situation.
www
. ElectricalPartManuals
. com
