Download With Pre-Contacts Without Pre-Contacts

CAPACITOR CONTACTOR
K3 - SERIES
Main Contacts
Pre-Contacts
•
•
•
5-10 ms
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
auxiliary contacts early make contacts
auxiliary contact block
R
R
open
damping resistors
main contacts
coil
contactor housing
Without Pre-Contacts
With Pre-Contacts
I = 1200 A
I = 300 A
K2-16A/K
12,5kVAr (18A/400V)
A: 250A / Div. time:0,5ms / Div.
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
20
10
0
30
40
400V / 50°C
400V / 60°C
60 kVAr f:35/m:50mm 2
75 kVAr
f:35/m:50mm 2
50 kVAr
f:35/m:50mm 2
33,3 kVAr
f:16/m:25mm 2
25 kVAr
50
f:16/m:25mm 2
60
20 kVAr
f:4/e:6 mm 2
12,5 kVAr
AC6b
Product range
80
70
K3-18K K3-24K K3-32K K3-50K K3-62K K3-74K
20
0
40
60
690V / 50°C
690V / 60°C
120
100kVAr f:35/m:50mm 2
120 kVAr
f:35/m:50mm 2
82 kVAr
f:35/m:50mm 2
55 kVAr
f:16/m:25mm 2
41 kVAr
80
f:16/m:25mm 2
100
33 kVAr
f:4/e:6mm 2
20 kVAr
AC6b
Product range
K3-18K K3-24K K3-32K K3-50K K3-62K K3-74K
Safety and Reliability by:
Covers
Safe Connection
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)