Instructional Literature
Page
132
Effective: May 2008
Instructions for the FP-6000 Protective Relay
For more information visit: www.eaton.com
IB02602004E
Figure 29. FP-6000 IQ Cutout Retrofit Mounting.
6.3. Wiring – General
The main electrical interconnections are made from the rear of
the outer case of the FP-6000. The mounting and wiring can be
done with the inner chassis withdrawn from the outer case.
Terminal lugs should be used to wire to the FP-6000. The terminal
lugs are inserted by loosening the screws of the terminal blocks
mounted on the rear of the outer case.
When routing wires between the FP-6000 and the associated
machine or process equipment, follow these guidelines:
•
Do not route the control wiring through the high voltage
compartment of the gear in which the FP-6000 is mounted.
•
Separate the lower voltage connections from the higher
voltage (440 Vac or higher) conductors as much as possible. In
general, maintain a minimum distance of 1.5 feet (45 cm)
between the two types.
•
Any low voltage control wiring routed out of the cabinet
should be at least #18 AWG stranded copper wire, AWG
maximum.
•
Any CT wiring routed out of the cabinet should be at least
#14 AWG stranded copper wire, 10 AWG maximum.
•
Communications circuits may use thinner conductors, as
recommended in installation literature for those circuits.
Figure 31 shows FP-6000 rear terminal connections.
Connect ground terminal shown in lower left-hand corner of rear
panel (see Figure 30) to the closest solid electrical-safety
grounding point with a heavy wire or braid (#14 AWG or larger).
Do not use a current-carrying or neutral conductor for this
grounding.
6.3.1 CT Wiring TB4
Carefully read the advice in Section 5.5.1 on choice of CT ratios
for a given particular application. An inappropriate CT ratio will
result in poor measurement accuracy and limited protection.
More serious errors in ratio choice will make it impossible to set
the relay properly.
Connect the phase and optional ground CTs as shown in Figure
34. Pay attention to the phase identification and sequence, and
check for consistent polarity among the three phases. The
FP-6000 unbalance protection will pick up and operate if two
phases are swapped, or if the polarity of any CT is reversed with
respect to the other two. See Figure 36 for other common wiring
configurations such as 3-phase 3-wire, 3-phase 4-wire, 3-phase
3-wire with ground fault protection.
with 5A ct module
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FP5000 Protective Relay
Term
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.
WARNING
BEFORE WORKING WITH THE WIRING, MAKE SURE POWER IS DIS-
CONNECTED FROM THE FP-6000, AND ALL REMOTE CONNECTIONS
INCLUDING CONTACT OUTPUT CONTROL CIRCUITS AND REMOTE
INPUT CONTACTS. OTHERWISE, HAZARDOUS VOLTAGES COULD
CAUSE INJURY OR DEATH. ALSO, UNEXPECTED CONTROL
ACTION COULD INJURE PERSONNEL OR DESTROY EQUIPMENT.