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Idiomas disponibles
AC contactor
Operating Instructions
Operating instructions for AC operation;
for DC operation (economy connection) see operating instructions
3ZX1012>0TF80>1AA1.
Limited protection against contact with live parts
!
Degree of protection IP 00 to IEC 60529
Safe from finger touch to DIN VDE 0106, Part 100
Commissioning and maintenance by qualified personnel only.
Follow the operating instructions.
WARNING:
HAZARDOUS VOLTAGE
CAN CAUSE ELECTRICAL SHOCK
DISCONNECT POWER BEFORE PROCEEDING
WITH ANY WORK ON THIS EQUIPMENT.
Installation
For dimension drawings see Fig. I (dimensions in mm).
> Fig. Ia with screw terminals
> Fig. Ibwith tab connectors
1)
Minimum clearances from earthed parts
Fix on a plain surface with four M6 screws > max. tightening torque
10.5!Nm. Always use plain washers and spring washers.
Cover the contactors during installation if foreign particles, such as swarf,
can fall onto them. Install contactors in a housing if they are exposed to
dirt, dust or aggressive atmospheres.
For permissible mounting positions see Fig. II.
Connection
Permissible conductor cross>sections for main terminals:
> see Fig. IIIa
1 or 2 conductors can be
3TF52
connected
Finely stranded
35 to 95
2
[mm
],
with cable lug
2
Stranded [mm
],
50 to 120
with cable lug
Terminal bars
20¥ 3
AWG wires,
1/0
to
solid and stranded
MCM
Terminal screws
M8¥ 25
Tightening torque
10 to 14 Nm/
89 to124 lb.in
Use cover 3TX7506>0A (3TF52> Fig. IIIb) or 3TX7536>0A (3TF53, 3TK52>
Fig. IIIc) for oversized cable lugs.
Permissible conductor cross>sections for auxiliary terminals:
Solid
Finely stranded, with end sleeve
Terminal pin, in accordance with DIN 46231
Push>on receptacle B2.8
AWG wires,
solid and stranded
Stripped length
Tightening torque
For circuit diagram and position of connection terminals see Fig. IV.
> Fig. IVa
2NO+2NC
> Fig. IVb
4NO+4NC
For circuit diagram (NEMA) see Fig. A.
Use 75∞ C copper wire only.
2
AND BURNS.
3TF53
3TK52
50 to 240
50 to 240
70 to 240
70 to 240
25¥ 5
25¥ 5
250
2/0 to 500 MCM
2/0 to 500 MCM
M10¥ 30
M10¥ 30
14 to 24 Nm/
14 to 24 Nm/
124 to 210 lb.in
124 to 210 lb.in
2
2¥ 1 to 2.5 mm
2¥ 0.75 to 1.5 mm
2
2¥ 1 to 1.5 mm
2¥ 0.3 to 1.5 mm
2¥ 18 to 12
10 mm/0.4 in
0.8 to 1.4 Nm/7 to12 lb.in
Order No.: 3ZX1012>0TF08>1AA1
Operation
Observe operating voltage (see rating plate of magnet coil).
The operating state of the contactor is shown at the position indicator;
see Fig.!V.
After a short circuit the main contacts and the arc chute must be checked.
Maintenance
The following components can be replaced: Main contacts, arc chute,
magnet coil, auxiliary contact blocks. > For Order No. see Catalog NSK.
Only use of original spare parts ensures the operational safety of the
contactors.
Cleaning
Remove dust by suction.
Auxiliary contact block
For replacement see Fig. VI /1, 2, 3; for extension see Fig. VI /4, 5, 6.
Arc chute and main contacts
Remove arc chute (Fig. VII /1, 2, 3). Check main contacts (Fig. VII /4). If
necessary, separate slightly welded contacts with a screwdriver.
Dark or rough contacts can still function. Do not refinish or grease them.
If the contact facings are eroded so that the carrier material becomes
visible, the contacts must be replaced (Fig. VII /4a).
For replacement of contacts see Fig. VII /5, 6, 7.
It is not necessary to disconnect the main conductors. Check the arc chute
and replace it if necessary.
With the arc chute removed, the contactor is mechanically interlocked.
Coil excitation is not permitted under these conditions.
Magnet coil
For coil replacement see Fig. VIII.
Ensure that the pole faces of the magnet coil are clean. Do not use grease
solvents or sharp objects for cleaning.
Technical Data
Weight
Permissible ambient temperature
> Operation
> Storage
Main circuit
Rated insulation voltage U i
Rated power
> 230 V
at
> 240 V
> 400 V
> 415 V
> 500 V
> 690 V
> 1000 V
Rated operational current
> I
/AC>1 (55 ∞C) to 690 V
e
> I
/AC>3
e
> I
/AC>3
e
2
2
3TF52, 3TF53, 3TK52
DIN VDE 0660, IEC 60947
approx. 4.8 kg
> 25 to+55 ∞C
> 50 to+80 ∞C
AC 1000 V
AC>3
3TF52
kW
55
kW
57
kW
90
kW
98
kW
118
kW
156
kW
90
3TF52
A
210
to 500 V
A
170
at 690 V
A
170
AC>3
AC>1 (55 ∞C)
3TF53
3TK52
64
120
69
131
110
207
120
226
145
272
156
360
90
173
3TF53
3TK52
220
315
205
105
170
105
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