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Contactor for capacitor switching:
Type: 3TS11.. to 3TS15.. and  
3TS21.., 3TS22.., 3TS25..

  IS/IEC:60947-4-1

A. Technical Data

i)  Main circuit:

The capacitors are precharged during pick-up via early-make 
contacts and integrated pre-charge resistors before the main 
contacts close.
This combination may be used for switching of Individual 
capacitor for power factor correction of single loads or for 
switching capacitor banks in parallel in centralized group 
power factor correction system.

•  Insulation Voltage Ui = 690 V AC, 

 

Temperature

: Storage -25 to +55ºC

 

Service (without derating) -25 to +40ºC

Use the devices with the declared capacitor bank ratings only.

Contactor Type

Load of contactor when switching 
3ph-AC capacitor kVAr at 415/440V, 50Hz

3TS21..-0A..5-8K

5

3TS11..-0A..5-8K

7

3TS22..-0A..5-8K

10

3TS12..-0A..5-8K

12.5

3TS13..-0A..5-8K

16

3TS14..-0A..5-8K

20

3TS15..-0A..5-8K

25

3TS25..-0A..5-8K

30

• 

Switching frequency in Make/Break operations: 

 

180 Operating cycles / hour for all ratings

• 

Maximum back-up fuse rating:

 For Type-1 Coordination

 

Type-3NA7 as per IEC 60269

  

 :

1.6…1.8Ie

ii)  Aux Circuit: 

Inbuilt: Auxiliary Contacts 

1NO+1NC in case of 3TS1211 To 3TS1511 and 3TS2211, 

3TS2511

No built-in auxiliary contacts for 3TS1200 To 3TS1500 and 
3TS2200, 3TS2500
1NO in case of 3TS11... and 3TS21...

Additional Aux:

 

Facility to add-on 1NO or 1NC auxiliary contact block 
type 3TX40.. is available for 3TS11.., 3TS1200, 3TS1300, 
3TS1400, 3TS1500, 3TS21.., 3TS2200, 3TS2500

3TX 40.. Block fitment (For 3TS11.., 3TS1200, 3TS1300, 

3TS1400, 3TS1500, 3TS21.., 3TS2200, 3TS2500)

Aux Contact Rating:
3TX40

Ie AC-15 = 3.6A at 415V

 

Ie DC-13 = 0.48A at 220V

Note: 

Do not remove precharging resistors. If contactor is 

switched on load without resistor, it may cause damage to 

the contactor.

iii) Control circuit: 

•  Control voltage is marked on the coloured identification 

tag on the coil.

Note: 

•  The voltage is to be maintained within allowable limits.
•   Operation on under voltage conditions to the coil may 

cause damage to the coil/contactor.

•   Maximum back-up fuse rating for control circuit = 16A

 

= 6A if relay contact is in the control circuit.

iv) Internal connection diagram

3TS11..-0A..5-8K
3TS21..-0A..5-8K

3TS13..-0A..5-8K
3TS22..-0A..5-8K

  In built NO incase of 5kVAr & 7kVAr

Fig. 1

Connection Details for 
3TS11… to 3TS15... 
and 3TS21..., 3TS22..., 

3TS25... is shown in 

figure 1

Operating Instructions

Avoid operation during under voltage 

conditions. Switch only onto discharged 

capacitors. Manual operation not permitted 

for function testing.

Warning:

Commissioning and maintenance by 
qualified personnel only. Follow the 

operating instructions.
Do not remove precharging resistors. If 

contactor is switched on load without resistor, 

it may cause damage to the contactor.

Hazardous Voltage can cause Electric 
Shock and burns. 

Disconnect Power before proceeding with 
any work on this equipment.

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