Warner Electric Recommended Electrical Installation Procedure for Warner Electric Clutches and Brakes User Manual
Installation instructions, At 25, At 55
Recommended Electrical Installation Procedure
for Warner Electric Clutches and Brakes
Installation Instructions
P-1390
819-0188
Warner Electric clutches and brakes conform to UL
(Underwriters Laboratories) and CSA (Canadian Standards
Association) requirements. All packaged products come with
conduit boxes or are enclosed in housings with
provision for electrical conduit connection. UL Listed/CSA
Certified fittings must be used in making connections. All SF
clutch fields and brake magnets, in size 400 and larger,
accept UL and CSA conforming conduit boxes available from
Warner Electric. UL Listed/CSA Certified fittings must be
used in making connections.
The National Electrical Code (NEC) requires conductors sub-
ject to physical damage be adequately protected. When
electrical conduit is used, a minimum of 12" of 1/2" flexible
conduit is to be used between each brake and/or clutch and
its box. This construction will prevent improper bearing load-
ing in bearing mounted units and ease field and magnet
assembly and disassembly. Refer to the information below for
proper installation practices and
wire sizes.
Notwithstanding the above recommendations, all
electrical installations should conform to NEC and/or
other governing electrical codes.
Recommended wire size versus maximum distance.
Fractional Horsepower
Integral Horsepower
Sizes 170-400
Sizes 500-1525
Wire Size
Distance (feet)
Distance (feet)
AWG
6 volt
24 volt 90 volt
6 volt
24 volt 90 volt
18
20
280
1000
4
65
700
16
30
430
6
95
14
50
720
10
160
12
75
720
10
160
10
125
25
400
8
200
40
1/2" Flexible Conduit
12" Min. - 6' Max.
4" x 4"
Junction Box
Power
Supply
115 VAC
Incoming
Line
Power
4" x 4"
Junction
10'
Max.
3'
Max.
12"
Max.
4'-6'
Max.
12"
12"
3/4" Rigid Conduit
General construction wire type MTW or THW recommended.
#6 terminal screws (size 400 and smaller) torque to 15 in-lb.
#8 terminal screws (size 500 and larger ) torque to 20 in-lb.
Cycle Rates
The performance curves on this page and the following
page meet current UL Listing and Recognition coil
temperature limitations, which are class A or 105° C.
Consult Warner Electric's Catalog, P-1234 or P-1264,
for performance characteristics for applications not
subject to UL listings.
AT Models
Select the chart for the appropriate size AT clutch or brake. The
intersection of the reflected inertia (lb. ft.) and speed difference
(RPM) lines will indicate the maximum cycle rate for that size
unit.
Inertia (lb ft
2
)
S
p
e
e
d
D
if
fe
re
n
c
e
(
R
P
M
)
AT 25
.1
.2
.3
.5
1
2
3 4 5
10
20 30
50
100
100
600
900
1200
1800
3600
60 C
PM
60 CPM
20 C
PM
20 CPM 10 C
PM
10 CPM
5 C
PM
5 CPM
1 C
PM
1 CPM
30 C
PM
30 CPM
60 C
PM
20 C
PM
10 C
PM
5 C
PM
1 C
PM
30 C
PM
.4
40
Inertia (lb ft
2
)
S
p
e
e
d
D
if
fe
re
n
c
e
(
R
P
M
)
AT 55
.1
.2
.3
.5
1
2
3 4 5
10
20 30
50
100
300
100
600
900
1200
1800
3600
60 C
PM
60 CPM
30 C
PM
30 CPM
20 C
PM
20 CPM
10 C
PM
10 CPM
5 C
PM
5 CPM
1 C
PM
1 CPM
60 C
PM
30 C
PM
20 C
PM
10 C
PM
5 C
PM
1 C
PM
.4
40
Inertia (lb ft
2
)
S
p
e
e
d
D
if
fe
re
n
c
e
(
R
P
M
)
AT 115
.2
.4
1
2
4
3
5
10
20 30
50
100
300
100
600
900
1200
1800
3600
60 C
PM
60 CPM
30 C
PM
30 CPM
20 C
PM
20 CPM
10 C
PM
10 CPM
5 C
PM
5 CPM
1 C
PM
1 CPM
60 C
PM
30 C
PM
20 C
PM
10 C
PM
5 C
PM
1 C
PM
.3
.3
40
.5
Warner Electric
•
800-825-9050
P-1390
•
819-0188