Brochure
Table Of Contents
- Introduction
- Motor Failure and Protection
- Trip Class Designation
- Withstand Ratings
- Thermal Overload Relay
- Melting Alloy
- Non-Compensated Bimetallic
- Automatic Reset
- Ambient Temperature Compensated Bimetallic
- Thermal Overload Relay Trip Characteristics
- Solid State Overload Relay
- Additional Standard Features
- Optional Features
- Additional Standard Features
- Optional Features
- General
- Nameplate Versus NEC Full-load Current
- Service Factor
- Motor Branch Circuit Design
- Overload Relays
- Hand Reset Melting Alloy
- Accessories
- Isolated Auxiliary Contacts for Motor Logic Overload Relays
- DIN Adapter
- Lug-Lug/Lug-Extender Kits
- Remote Reset Module
- 4 – 20 ma DC Communication Module
- Contact Units for Melting Alloy Type Overload Relays
- Melting Alloy Overload Relay Jumper Strap Kits
- Bimetallic Overload Relays
- Motor Logic™ – Solid State Overload Relay
15
5/98
© 1998 Square D All Rights Reserved
Thermal Overload Relays – NEMA Rated
Approximate Dimensions
Melting Alloy Type NEMA Style
Type
Dimensions Shipping
Weight
(Lbs)
AB CD E F GHI JKLMNOP
SEO5 3
5
/
16
—
15
/
32
3
31
/
32
3
17
/
32
2
13
/
16
7
/
32
11
/
16
2
5
/
16
1
/
2
1
/
2
1
/
2
27
/
32
11
3
/
8
#10 1
SEO8 3
5
/
16
—
15
/
32
3
31
/
32
3
1
/
2
2
13
/
16
3
/
16
11
/
16
2
5
/
16
1
/
2
1
/
2
1
/
2
27
/
32
11
3
/
8
#10 1
1
/
4
SEO12 — 5
19
/
32
9
/
16
5
3
/
4
5
5
/
16
4
3
/
4
9
/
32
1
7
/
16
3
9
/
16
3
/
4
9
/
16
7
/
8
1
1
/
2
1
3
/
4
2#
1
/
4
3
SEO15 — 6
31
/
32
9
/
16
5
3
/
4
5
5
/
16
4
3
/
4
9
/
32
2
1
/
8
3
9
/
16
3
/
4
9
/
16
7
/
8
1
1
/
2
1
3
/
4
2#
1
/
4
4
2.93
74
2.75
70
3.25
83
.41
10
.28
7
1.34
34
.69
18
.25
6
0.5
13
Tripped
Reset
Travel
RESET
(2) 8-32
Mounting Screws
.44
11
R
E
S
E
T
Alarm
O.L.
Com.
Prov. for
(3) 1/4-20
Mtg. Screws
Terminal
Connections
Left Hand Right Hand
Reset
Travel
R
E
S
E
T
4.06
103
2.13
54
1.00
25
1.00
25
1.06
27
1.06
27
3.13
79
2.63
67
3.88
98
9.13
232
1.56
40
4.94
125
.47
12
.44
11
.47
12
6.03
153
1.41
36
.38
10
1.41
36
1.81
46
1.81
46
3.02
76
R
E
S
E
T
R
E
S
E
T
Alarm
O.I.
Com.
Prov. for
(3) #10-24
Mtg. Screws
Terminal
Connections
Left
Hand
Right
Hand
Reset
Travel
RESET
Reset Travel
Tripped
Over Thermal
Unit
0.6
15
.28
7
.77
20
2.00
51
.22
6
.38
10
.13
3
.27
7
3.25
83
.75
19
.94
24
6.19
157
2.75
70
1.00
25
1.00
25
(2) 5/16 Dia.
Locating Dowels
(2) 3/16 Dia.
Mounting Holes
Type CO1
Weight -
1
/
2
Lb
Type UO1 a
Weight - 1
1
/
2
Lb
Type TO1 a
Weight -
1
/
2
Lb
a Dimensions shown for Types TO1 and UO1 do not apply when Form Y342 or Y34 is supplied.
Types FO1L and FO1R
Weight - 2 Lbs
Types GO11L and GO11R
Weight - 5 Lbs
2.75
70
.94
24
Reset Travel
Tripped
.44
11
.22
6
.66
17
.31
8
3.25
83
.38
10
Over Thermal
Unit
(2) 3/16 Dia.
Mounting Holes
1.38
35
4.75
121
RESET
C
O
Prov. for (4) – P – Mtg. Screws
N
L
J
I
H
G
F
E
M
K
D
A
B
RESET
Type SEO