Cut Sheet

Volume 10—Enclosed Control CA08100012E—June 2015 www.eaton.com V10-T15-19
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15.1
Accessories and Modification Codes
Accessories
Heater Selection
General Information on Heater Coil Selection
For maximum motor
protection and compliance
with Article 430-32 of the
National Electrical Code,
select heater coils from the
tables in this section on the
basis of motor nameplate full
load current.
When the full load current is
unknown, selection may be
made on the basis of average
full load currents. Caution—
The average ratings could
be high or low for a specific
motor and therefore
selection on this basis
always involves risk. For
fully reliable motor
protection, select heater
coils on the basis of full
load current rating as
shown on the motor
nameplate.
Heater coils are rated to
protect 40°C rise motors, and
open and drip-proof motors
having a service factor of
1.15 where the motor and the
controller are at the same
ambient temperature.
For other conditions:
1. For 50°C, 55°C, 75°C rise
motors and enclosed
motors having a service
factor of 1.0, select one
size smaller coil.
2. Ambient temperature of
controller lower than
motor by 26°C (47°F),
use one size smaller coil.
3. Ambient temperature of
controller higher than
motor by 26°C (47°F),
use one size larger coil.
Ultimate tripping current of
heater coils is approximately
1.25 times the minimum
current rating listed in the
tables.
Heater Selection—Type A and B Overload Relays, Sizes 3 and 4
Heater Selection—Type A and B Overload Relays, Sizes 5 and 6
Note
Size 7 and larger—advise full load current.
Size
Starter
Ambient
Compensated
Enclosed Starters
Non-Compensating
Enclosed Starters
Heater
(One Heater per
Catalog Number)
Size
Starter
Ambient
Compensated
Enclosed Starters
Non-Compensating
Enclosed Starters
Heater
(One Heater per
Catalog Number)All Applications All Applications
Full Load Current of Motor Amps Catalog Number Full Load Current of Motor Amps Catalog Number
12.8–14.1 11.9–13.0 FH68 51–55 47–51 FH82
14.2–15.5 13.1–14.3 FH69 56–61 52–56 FH83
15.6–17.1 14.4–15.9 FH70 62–66 57–61 FH84
17.2–18.9 16.0–17.4 FH71 67–73 62–67 FH85
19.0–20.8 17.5–19.1 FH72 74–78 68–72 FH86
20.9–22.9 19.2–21.1 FH73 79–84 73–77 FH87
23.0–25.2 21.2–23.2 FH74 85–92 78–84 FH88
25.3–27.8 23.3–25.6 FH75 93–101 85–91 FH89
27.9–30.6 25.7–28.1 FH76 102–110 92–99 FH90
30.7–33.5 28.2–30.8 FH77 111–122 100–110 FH91
33.6–37.5 30.9–34.5 FH78 123–129 111–122 FH92
37.6–41.5 34.6–38.2 FH79 130–133 123–128 FH93
41.6–56.3 38.3–42.6 FH80 — 129–133 FH94
46.4–50 42.7–46 FH81
Compensated Overload Relay
Heater (One Heater
per Catalog Number)
Compensated Overload Relay
Heater (One Heater
per Catalog Number)Open Starter Enclosed Starter Open Starter Enclosed Starter
Full Load Current of Motor (Amps) Catalog Number Full Load Current of Motor (Amps) Catalog Number
Size 5 (with 300/5 Current Transformers) Size 6 (with 600/5 Current Transformers)
—— FH23 —— FH23
118–129 118–129 FH24 236–259 236–259 FH24
130–141 130–141 FH25 260–283 260–283 FH25
142–155 142–155 FH26 284–310 284–310 FH26
15
6–170 15
6–170 FH27 311–340 311–340 FH27
171–187 171–187 FH28 341–374 341–374 FH28
188–205 188–205 FH29 375–411 375–411 FH29
206–224 206–224 FH30 412–448 412–448 FH30
225–244 225–244 FH31 449–489 449–489 FH31
245–263 245–263 FH32 490–527 490–527 FH32
264–292 264–292 FH33 528–585 528–540 FH33
293–300 — FH34 586–600 — FH34
For Size 4 Starters For Size 3 Starters
For Size 4 Starters
For Size 3 Starters