Cutler-Hammer Freedom 2100 Series, Руководство по установке и обслуживанию

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16 I.B. 8926-1A
TYPE HMCP AND FD CIRCUIT BREAKERS
WITH TERMINAL END COVERS
Circuit breakers installed in units connected to 600
volt distribution systems require a terminal end cap
to be installed on the line side. Replace the terminal
end cap when replacing circuit breakers in such
units.
Part 7
OVERLOAD RELAY HEATER SELECTION
HEATER SELECTION AND INSTALLATION
Heaters should be selected on the basis of the
actual full load current and service factor as shown
on the motor nameplate or in the motor
manufacturer’s published literature.
When motor and overload relay are in the same
ambient and the service factor of the motor is 1.15 to
1.25, select heaters and set
FLA adjustment dial
from the heater application table. If the service
factor of the motor is 1.0, or there is no service
factor shown, rotate the FLA adjustment dial
counter-clockwise one half (1/2) position.
The conductors attached to the terminals of an
overload relay act as a heat sink and are a
consideration in establishing the current rating of
each heater element. To prevent nuisance tripping,
which will occur if undersized conductors are used,
select the wire size as if the conductors had an
insulation temperature rating of 75
°
C, even if the
conductors actually used have a temperature rating
higher than 75
°
C.
Protect heater and starter against short circuits by
providing branch circuit protection in accordance
with the National Electric Code.
Note: Before installing heater packs, refer to the
motor nameplate for FLA (full load amps) and
service factor (1.5 or 1.0). Select the heater pack
from the proper table on this page.
To install:
A. Insert three (3) identically numbered heater packs
into the overload relay with an FLA rating that
includes the motor nameplate FLA (full load
amps).
B. Tighten the heater pack mounting screws
securely per recommended torque values listed
below.
Heater Pack Numbers Recommended Torque
H2001B thru H2017B
H2018 thru H2024
9 lb-in [1 N
•
m]
24-30 lb-in [2.7-3.4 N
•
m]
C. Adjust the FLA adjustment dial to
the motor nameplate FLA (full
load amps).
THE OVERLOAD IS NOW SET FOR
1.15 SERVICE FACTOR.
D. If the motor nameplate is 1.0
service factor, rotate the FLA
Adjustment dial counter-clockwise
on half (1/2) position.
E. The overload is factory set for M
(MANUAL) reset operation. If
automatic reset is required, turn
the reset adjustment dial to
A
(AUTO) . Automatic reset is not
intended for two-wire control
devices.
Heater Pack
Mounting Screw