CAPACITOR CONTACTORCAPACITOR CONTACTORK3 - SERIESK3 - SERIES

• Make-operation:- The inrush current peaks are reduced by the resistor wires

- All contactors are provided with pre-contacts with snap function

- The pre-contacts are opening after the main contacts are closed

- The single controlled pre-contacts - as one block - are increasing the reliability against dust

in the field and during transportation

• Operation:- No power losses of the resistor wires during operation, because they are no longer in the circuit

• Break:- No movement of the pre-contacts during breaking operation, these capacitor contactors can be used for all applications with high inrush currents

Main Contacts

Pre-Contacts 5-10 ms

R R

open

contactor housing

coil

R R

auxiliary contacts -early make contacts

auxiliary contact block

damping resistors

main contacts

K2-16A/K 12,5kVAr (18A/400V)

A: 250A / Div. time:0,5ms / Div.

With Pre-ContactsWithout Pre-Contacts

I = 1200 A

I = 300 A

Advantages K2 & K3-series Contactor Range between 12,5 kVAr and 75 kVAr

Usable for detuned and non-detuned capacitor banks

Resistant against voltage raise caused by de-tuning

No change of contactors in case of later installed detuning reactors

Highest reliability in operation by using single controlled pre-contacts

Reduced stress for capacitors

Reduced power losses during operation

Standardised design

Compact design, small dimensions

Standards: IEC/EN 60947 + VDE 0660

UL-Approved (UL508)

Advantages range-K3

Contactor Width up to 25/41 kvar 45mm only

Larger terminals for larger cable cross-sections

Box terminals for all contactors beginning at 20/28kVAr

Up to 60 °C ambient temperature without derating (except 75/120kVAr)

Covers for all moving parts of contactor

Operation Indicator by auxiliary contact

Side add-on auxiliary contact blocks (1NO+1NC)

Integrated DIN-rail mounting

Product range

12,5

kV

Ar

f:4/

e:6

mm

2

20 k

VA

r

f:16

/m:2

5mm

2

25 k

VA

r

f:16

/m:2

5mm

2

33,3

kV

Ar

f:35

/m:5

0mm

2

50 k

VA

r

f:35

/m:5

0mm

2

75 k

VA

r

60 k

VA

r f

:35/

m:5

0mm

2

0

10

20

30

40

50

60

70

80

AC

6b

K3-18K K3-24K K3-32K K3-50K K3-62K K3-74K

400V / 50°C400V / 60°C

20 k

VA

r

f:4/

e:6m

m2

33 k

VA

r

f:16

/m:2

5mm

2

41 k

VA

r

f:16

/m:2

5mm

2

55 k

VA

r

f:35

/m:5

0mm

2

82 k

VA

r

f:35

/m:5

0mm

2

120

kVA

r

100k

VA

r f

:35/

m:5

0mm

2

0

20

40

60

80

100

120

AC

6b

K3-18K K3-24K K3-32K K3-50K K3-62K K3-74K

690V / 50°C690V / 60°C

Product range

Safety and Reliability by:Safety and Reliability by:

Safe ConnectionCovers

Customer benefits at one glance

Excellent damping of inrush current

Improved power quality (e.g. avoiding voltage sags)

Smooth switching of the capacitor and

therefore increased lifecycle of contactor and

capacitor

Increased lifecycle of the capacitor bank!

Reduction of assembly time

Reduction of ohmic losses (Cable turns)