Cut Sheet

Volume 10—Enclosed Control CA08100012E—November 2012 www.eaton.com V10-T10-7
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10.1
Multi-Pak Group Control
Modules and Enclosures
Heater Selection
The full load current shown
on each motor nameplate
should be checked with the
heater application tables to
assure that the heaters
chosen with each starter unit
agree with this table and with
the actual motor protection
requirements. Do not rely on
code marking on the heater
to indicate current rating. In
making this check, the
following Notes 1–3
regarding special conditions
should be considered.
Notes on Overload Heater
Application
1. The heater application
tables provide 115–125%
protection for motors
rated 40°C having a
service factor of 1.15 and
1.25.
2. Use one smaller heater
when:
a. The motor is rated 50°
or 55°C.
b. The motor has a
service factor of 1.00.
c. A maximum of 115
protection is desired.
3. Overload relays are
ambient compensated,
therefore base heater
selection on motor
current, and disregard
ambient temperature
differences.
The relay will provide
protection against abnormal
load conditions to current
values exceeding normal
locked rotor current. The relay
should be protected against
short-circuits by providing
branch circuit protection per
National Electric Code, but
not to exceed the maximum
fuse ratings listed in the
heater tables.
Note: To provide continued
protection against fire and shock
hazard, the complete overload
relay must be replaced if burn out
of the current element occurs.
Overload Relays, Three-Pole Protection
Heater Selection—Starter Size 1
1
Notes
1
Use in fusible starters only. Do not use with circuit breakers.
2
Ambient compensated.
Motor Full Load
Current in Amperes
2
Style
Number
Maximum
Breaker or Fuse Catalog Number
0.51–0.55 117C524G10 2 FH10
0.56–0.62 117C524G11 2 FH11
0.63–0.68 117C524G12 2.5 FH12
0.69–0.75 117C524G13 3 FH13
0.76–0.83 117C524G14 3 FH14
0.84–0.91 117C524G15 3 FH15
0.92–1.00 117C524G16 3 FH16
1.01–1.11 117C524G17 4 FH17
1.12–1.22 117C524G18 4 FH18
1.23–1.34 117C524G19 5 FH19
1.35–1.47 117C524G20 5 FH20
1.48–1.62 117C524G21 5 FH21
1.63–1.78 117C524G22 6 FH22
1.79–1.95 117C524G23 6 FH23
1.96–2.15 117C524G24 8 FH24