Siemens 3US58 Manual De Instrucciones

Overload Relay with
Phase Loss Sensitivity
Operating Instructions
Read and understand these instructions before installing,
operating, or maintaining the equipment.
DANGER
!
Hazardous voltage.
Will cause death or serious injury.
Turn off and lock out all power supplying this device before
working on this device.
CAUTION
Reliable functioning of the equipment is only ensured with
certified components.
Mounting
Dimension drawings
(dimensions in mm):
3TS47 to 3TS50
with screw terminals, AC operation, with or without overload relay (3US58)
1)
Minimum distance from insulated components 3 mm
Minimum distance from earthed components 10 mm
2)
Dimension for square OFF button (stroke 3 mm).
Dimension for round RESET button (stroke 2.5 mm) dimension minus
2.5 mm.
For mounting on contactors 3TS47 / 48 / 49 / 50
Individual mounting possible with terminal bracket 3US1958.
Permissible installed positions: Fig. II
a Overload relay with contactor
b Overload relay with terminal bracket
Do not subject to sudden shocks or long-term vibrations.
Connection
Permissible cable cross-sections: Fig. III
Equipment circuit diagram: Fig. IV
In the case of several single-phase loads, the three main circuits must be
connected in series.
Commissioning
Instructions: Fig. V
¿ Set the scale to the rated current of load, use the "-" mark unless there is
a special description.
Attention: when mounted with contactor, 3US58-8X max current is 100 A,
using the "-" mark; when mounted alone 3US58-8X max current is 105 A,
using the "." mark.
À Reset button (blue)
Push this button before commissioning and after tripping to make relay
ready for operation.
In the as-delivered condition, the auxiliary contact is set to H = Manual
resetting.
To change from H = Manual to A = Automatic, press and turn the button
counter-clockwise from H to A.
Á Test button (red)
When this button is actuated, the NC contact opens and the NO contact
closes, i.e. a test function for NC and NO contacts (simulation of overload
tripping).
In the "Manual" position, the relay is reset when the blue button is
pressed.
In the "Automatic" position, the relay is reset automatically when the red
button is released.
 TRIPPED indication (green)
In the H setting, a green pin protrudes from the front plate to indicate the
TRIPPED condition. In the A setting, this condition is not indicated.
Tripping characteristics: Fig. VI
The characteristics conform to VDE 0165, VDE 0170 / 0171 for machines
with type of protection E Ex e.
A5E02261863A-02
Order No.: 3ZX3012-0US58-0AY0
Fig. I
DIN VDE 0660 part 102, IEC 60947-4-1,
Tripping times are shown for a three-phase load from the cold state
(ambient temperature + 20 °C). In the case of hot relays, preloaded with
1 x I , the tripping times decrease by approx. 25 %.
E
I : Current setting
E
t : tripping time in seconds (+20 %)
A
¿ Setting range
(I = lowest value of current setting I
setting I )
E
À Type designation / Order No..
Technical data
Main circuit
Rated insulation voltage
Rated operational current
Permissible ambient air temperature -25 °C ~ +55 °C
Short-circuit protection
Auxiliary circuit
Rated insulation voltage:
400 V
different potential
Rated operational current:
AC-15 / U
V 24
e
AC-15 / I
A 2
e
DC-13 / U
V 24
e
DC-13 / I
A 2
e
Short-circuit protection:
NH, NEOZED or DIAZED fuses
Miniature circuit-breaker
Operating conditions at ambient temperatures > 55 °C
At ambient temperatures > 55 °C, you must
1. Reduce the current loading for the overload relay
2. Upwardly correct the setting current to prevent tripping at motor rated
current.
Correction factors:
Ambient Perm. Current loading
temperature referred to end-of-scale value
55 °C
60 °C
65 °C
70 °C
Calculation example:
Motor rated current: 20 A
Ambient temperature: 70 °C
Overload relay fitted: 16 to 25 A
1st Step: Determine the permissible current loading:
Max. current loading: 25 A x 0.82 = 20.5 A
Loading with motor rated current 20 A at 70 °C ambient temperature is per-
missible.
2nd Step: Calculate the setting current:
Motor rated current: 20 A
Setting current correction: 20 A x 1.1 = 22 A
You must set the overload relay to 22 A.
For further information and accessories, see Catalog.
3US58
Q/320500 SMS 011, GB14048.4
English
, II = highest value of current
E
1000 V
12.5 to 100 A (mounted with contactor)
12.5 to 105 A (mounted alone)
see nameplate
690 V
same potential
60 125 230 400 500
1.5 1.25 1.15 1.1 1
60 110 220
0.5 0.3 0.2
6 A, Dz 10 A
3 A (C-characteristic)
Setting current
correction
1 1
0.94 1.08
0.88 1.09
0.82 1.1
Last update: 01 April 2011
690
0.8