3TS Capacitor

duty contactors
Smart. Easy. Reliable.

s
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 Overview:
For more than 125 years, Siemens has been developing and manufacturing industrial
control products. We offer a wide product range which caters to fulfill the demand of
our esteemed customers with satisfactory performance level and improved reliability.
The new range of capacitor duty contactor has been launched to provide a reliable and
economical solution for capacitor switching applications.

Capacitor Duty Contactor

are energized, overcurrents of high amplitude and
high frequencies (3 to 15 kHz) occur during the
transient period (~1 ms).
The amplitude of these current peaks, also
known as “inrush current peaks”, depends on the
following factors:
• The network inductances.
• The transformer power and short-circuit voltage.
• Type of power factor correction: fixed or
automatic.
• Harmonics present in the system.
The in-rush current of such high magnitudes is
Range: undesirable and it is likely to weld main contacts
• 5kVAr - 50kVAr of any standard contactor. Therefore, contactor
Features: for capacitor bank switching must be designed to
• Delatching operating principle withstand :
• SIGUT Termination technique • Permanent current that can reach 1.5 time the
• Finger touch proof terminals $ nominal current of capacitor bank.
• Compact Dimensions • Short but high peak current on pole closing.
• DIN / Screw mounting
Hence, capacitor duty switching device requires
Benefits: careful selection. It is always recommended to
• Reliable switching of capacitor banks use dedicated capacitor duty switching contactor
• Ease of wiring (can obviate use of lugs) for switching capacitor bank, which optimizes the
• Operator Safety switchgear cost & enhances the equipment life.
• Space saving
Siemens 3TS capacitor duty contactor works on
• Flexible mounting
mechanical delatching operating principle, which
Standards: ensures reliable switching of capacitors as per AC-
• IEC 60947-4-1 6b utilization category.
Approbations: Delatching operating principle:
• CE marking
The front-mounted block mechanism of the 3TS
Operating Principle: capacitor duty contactors ensures:
In Low Voltage industrial installations, capacitors • early making of the auxiliary contacts “AC” with
are mainly used for reactive power correction respect to the main contacts “MC”
(raising the power factor). When these capacitors • automatic return to the open position of the auxiliary
contacts after the main contacts are closed.
When the coil is energized, the early making
auxiliary contacts connect the capacitor to the
network via the set of 3 resistors. The damping
resistors attenuate the first current peak and the
second inrush current when the main contacts
begin to make. Once the main contacts are
in the closed position, the auxiliary contacts
automatically break.
When the coil is de-energized, the main contacts
AC = auxiliary contacts; MC = main contacts break ensuring the breaking of the capacitive
current. The contactor can then begin a new cycle.
$ upto 30kVAr

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 Technical specifications

Type 3TS21 3TS11 3TS22 3TS12 3TS13 3TS14 3TS15 3TS25 3TS27 3TS17

Size
1 2 3 4
Dimensions (H x D x W)
including auxiliary switches and connecting cables HxDxW HxDxW HxDxW HxDxW
• Screw-type terminals mm 115 x 125 x 45 115 x 136 x 45 120 x 148 x 55 117x177x90

General technical specifications

Conformance to IEC-60947-4-1
Approvals CE
Degree of protection acc. to IEC 60529 IP IP 20 IP 20 IP20 for Aux block IP00 contactor IP 00
Storage temperature °C -25 to +55
Operating temperature °C -25 to +40
Altitude of site (without technical restrictions) m 2000
Type of mounting DIN / Screw Screw

Main Circuit

Rated insulation voltage Ui V 690 V 690

Rated operational voltage Ue V 415 / 440 V 415 / 440
Rated operational Current Ie
A 7 9.7 13.9 17.4 22.3 27.8 34.8 41.7 55.6 69.6
(Harmonic & Safety factor excluded)
Impulse withstand voltage Uimp kV 6
Rated frequency Hz 50
Capacitor rating at rated power
kVAr 5 7 10 12.5 16 20 25 30 40 50
(utilization category AC-6b) 415/440 V, 50Hz

Cycles
Max. switching frequency 180 100
per hour

Coil operating range 0.85 to 1.1Us

Auxiliary contacts mounted 1 NO 1NO+1NC 2 NO + 2 NC
Auxiliary contacts mountable 1NO or 1NC –
"Short-circuit protection device for contactors
With Fuse - Operational class gG - A 20 20 32 32 50 50 63 80 100 125
Type 1 co-ordination (3NA7)"

Connecting characteristics

Main conductors Screw terminals

Terminal screw size M3.5 M4 M6
Screw head type Slotted Cheese Head Hex Head
Tightening torque Recommended N-m 0.8 to 1.4 1 to 1.5 2.5 to 3 4 to 6
Conductor cross-section
Solid mm2 1 x (1 to 2.5) 1 x (2.5 to 6) 1 x (1 to 16)
Finely stranded with end sleeve mm2 1 x (0.75 to 2.5) 1 x (1.5 to 4) 1 x (1.5 to 16)
Finely stranded mm2 - - 1 x (1.5 to 16)
Finely stranded with pin end connector mm 2
1 x (0.75 to 2.5) 1 x (1.5 to 4) 1 x (1.5 to 16)
Finely stranded with ring type lug mm2 – 1 x35, 2 x 16
Busbar (max width) mm – 12
Auxiliary conductors
Screw terminals
(built-in auxiliary terminals + coil terminals)
Screw head type Slotted Cheese Head
Tightening torque Recommended N-m 0.8 to 1.4
Conductor cross-section
Solid mm2 2 x (0.5 to 1, 1 to 2.5), 1 x 4
Finely stranded with end sleeve mm2 2 x (0.75 to 2.5)
Finely stranded with pin end connector mm 2
2 x (0.75 to 2.5)

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 Selection and ordering data
Capacitor duty contactor - 3TS
For switching capacitor banks with AC coils
Capacitor Std. Std.
Built-in aux. Built-in aux.
kVAr 415V, Type1) pkg. Type1) pkg.
contacts contacts
3ph, 50Hz (nos.) (nos.)
5 kvar 1 NO 3TS2110-0A..5-8K† 1
7 kvar 1 NO 3TS1110-0A..5-8K† 1
10 kvar – 3TS2200-0A..5-8K† 1 1NO+1NC 3TS2211-0A..5-8K 1
12.5 kvar – 3TS1200-0A..5-8K† 1 1NO+1NC 3TS1211-0A..5-8K 1
16 kvar – 3TS1300-0A..5-8K† 1 1NO+1NC 3TS1311-0A..5-8K 1
20 kvar – 3TS1400-0A..5-8K† 1 1NO+1NC 3TS1411-0A..5-8K 1
25 kvar – 3TS1500-0A..5-8K† 1 1NO+1NC 3TS1511-0A..5-8K 1
30 kvar – 3TS2500-0A..5-8K† 1 1NO+1NC 3TS2511-0A..5-8K 1
40 kvar 2 NO + 2 NC 3TS2722-0A..5-8K 1
50 kvar 2 NO + 2 NC 3TS1722-0A..5-8K 1
† Facility to add one contact block of 1NO / 1NC

Spares for capacitor duty contactor - 3TS

Pre-charge resistor + Contact block kit Spare coils
Std. Contactor Std. pkg.
Contactor Description Type1)
Description Type pkg. kVAr (nos.)
kVAr
(nos.) 5 kvar
10 kvar 3TS9762-0SX15-8K 1 7 kvar
3TY74030A.. 1
12.5 kvar 3TS9762-0SX15-8K 1 10 kvar
Pre-charge
16 kvar 3TS9763-0SX15-8K 1 12.5 kvar
resistor +
early making 16 kvar AC 50Hz
20 kvar 3TS9764-0SX15-8K 1
contact 20 kvar coil
25 kvar block 3TS9765-0SX15-8K 1 3TY74430A.. 1
25 kvar
30 kvar kit + main 3TS9765-0SX15-8K 1
contacts kit 30 kvar
40 kvar 3TS9767-0SX15-8K 1 40 kvar
3TY7 463-0A.. 1
50 kvar 3TS9767-0SX15-8K 1 50 kvar
Note: Pre-charge resistor + early making contact block kit + main
contacts should be replaced simultaneously

Accessories for capacitor duty contactor - 3TS 1) AC 50Hz coil code - Please enter coil
codes from table below
Auxiliary contact blocks Spare auxiliary contact block
Std. Std.
For contactor Description Type pkg. For contactor Description Type pkg. For 3TS contactors
(nos.) (nos.)
3TS21 / 3TS11 / 1NO 3TX4 010-2A 10 Code F0 P0 R0
Built-in,
3TS22 / 3TS12 / 3TY7 561-
3TS27 / 3TS17 1NO+1NC 1
3TS13 / 3TS14 / 1AA00-8K
1NC 3TX4 001-2A 10 Left/ Right Coil voltage (V) 110 230 415
3TS15 / 3TS25

Circuit diagram

3TS 21 / 11 / 22 / 12 / 13 / 14 / 15 / 25 3TS27 / 17
« In built NO incase of 5 and 7 kVAr only.

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 Mounting details Terminal drawing

Frame 1
3TS21/3TS11 3TS21/3TS11 3TS22/3TS12/3TS13/
3TS14/3TS15/3TS25

Frame 2, 3, 4
3TS22/3TS12/3TS13/3TS14/
3TS27/3TS17
3TS15/3TS25/3TS27/3TS17

Dimensional drawing

Dimensional drawing : 5,7,10,12.5,16,20,25,30 kVAr, Dimensional drawing : 40 and 50 kVAr,

(3TS 21/11/22/12/13/14/15/25..-0A..5-8K) (3TS 27/1722-0A..5-8K)

Capacitor kVAr Built-in

Term
415V, Type aux. A B C D F G H J K L ØE M
Screw
3ph, 50Hz contacts

5,7 kVAr 3TS21/3TS11 1NO 125 74 60 10 115 78 45 60 35 – 4.8 48 M3.5

10,12.5 kVAr 3TS2200/3TS1200 – 136 85 70 14.5 115 85 45 75 35 – 4.8 51 M4

16,20,25,30 kVAr 3TS1300/3TS1400/3TS1500/3TS2500 – 148 85 63 18 120 103 55 75 45 – 5 62.5 M4

10,12.5 kVAr 3TS2211/3TS1211 1NO+1NC 136 85 70 14.5 115 85 45 75 35 58 4.8 51 M4

16,20,25,30 kVAr 3TS1311/3TS1411/3TS1511/3TS2511 1NO+1NC 148 85 63 18 120 103 55 75 45 68 5 62.5 M4

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