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4/84 Cam switches, switch-disconnectors
2010 CA08103002Z-EN
www.eaton.comT, TM
Engineering notes for non-standard contact sequences
Ordering of non-standard contact sequences
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Switch size Number of contact units
(2 contacts per contact unit)
Contact sequence number
With country ID corresponding to the
country of manufacture.
Send completed form (as shown on the
right) if ordering for the first time. The
contact
sequence number is specified by
the supplying factory. Specifying the
part no. is enough when placing repeat
orders.
Mounting form
• Mounting form /E
• Center mounting /EZ (for T0, T3)
• Surface mounting /I...
1)
• Service distribution board mounting /
IVS (for T0)
• Rear mounting /Z
• Flush mounting main switch /EA/SVB
2)
• Surface mounting main switch /I.../SVB
• Rear mounting main switch /V/SVB
2)
• Designs for TM: /E, /EZ, or /IVS
Accessories
Always specify
completely for
every order!
For TM.../EZ:
only +EZ/S... possible
Max.
units
Contacts
max.
T0
11
22
T3
11
22
T5B
10
20
T5
10
20
TM
8
16
Contact sequence
The adjacent form makes it easier to specify the
contact sequence.
Master copy
Switching angle
30, 45, 60, 90°
Preferred angle: 60°
For On-Off switches: 90°
For main switches: 90° as FS 908
Changeover with interruption between
2 positions (ON-OFF-ON) not permissible for T0;
T3, and TM = 30°, 45°; for T5(T5B) = 30°
Star-delta switch only with switching angle ≧ 60°
Terminal marking
TM switches have consecutive
terminal markings starting with 1.
Spring-return
The switching action is limited by a stop. The
switch returns under spring pressure to the last
position. Where a switch has spring-return from
both directions, a maximum of max. 3 positions can
be traversed.
The spring-return angle is < ½ switching angle.
A max. of 6 contacts can be returned at the same
time.
The switching angle of spring-return TM mini rota-
ry switch must be ≧ 60°.
Fleeting contacts
The duration of the fleeting contact depends
primarily on the actuation speed. In order to
actuate a contactor with a fleeting pulse, the
switching angle of the cam switch must not be less
than 60°, since the pulse time can be too short if the
switching angle is smaller. Fleeting contact
elements always operate in
both
operating
directions.
Complete rotation
Only possible with a total switching angle of 360°.
The direction of switching can be in either
operating direction. The number of switch
positions multiplied by the switching angle must be
360°. TM with 12 positions (one every 30°) only
available with complete rotation, not with stop.
Front plates
Front plates are part of the equipment supplied
with a "first order of rotary switch" and therefore
do
not
need to be ordered separately.
Number of contact units
The contact chamber = contact unit (BE) has 1 or 2
contacts, each of which is actuated by a cam.
In T5(B), there is a common cam for both contacts.
Because of this, the following applies for T5(B):
If the total switching angle is
less than 180°,
the
contacts can be switched
independently
of each
other. With switching angles greater than or equal
to 180°, there can only be 2 contacts in the same
chamber if their switching sequences are the
same but are offset by 180° (e.g. T5B-4-8235 step
switch).
Standard features
Same as cam switch with standard contact
sequence.
Number of contacts = Round up to nearest whole
number
2
Notes
It is possible that the order of the contacts is
altered due to technical reasons.
For special switches bridges are only possible
between a even or uneven number.
Other connections must be made by the user at
installation.
1)
For T0-.../I1: max. 4 contact units
For T3-.../I2: max. 5 contact units
2)
For T0: up to a max. of 8 contacts = 4 BE,
For T3: up to a max. of 12 contacts = 6 BE