Schaltbau’s new, highly modular CF series begins with a compact 3-pole AC power contactor for loads up to 600 A and 3000 V for inverter-fed alternating current drives with higher frequencies. One special feature are the newly developed switching chambers. These can be universally configured as NO, NC or in combination as a change-over.
An efficient electronic economy circuit reduces power consumption as well as heat loss and saves costs.
CF contactors can be adapted in many ways. The high variance makes the devices interesting for use in many different applications. The innovative switchgear is equally ideal for new projects and modernisation. They can successfully replace cam contactors that have proven themselves over many years. DC variants will follow.
Minimum dimensions for width, depth and height in this performance class. The shorter “S” versions have one drive, the longer “W” versions have two drives. All air gaps in the contact area are generously dimensioned.
The rated insulation voltage is a maximum of 3,600 V.
The arc chamber design is optimized for the planned application. CF contactors have efficient arc chambers with plastic or metal extinguishing elements. Ceramic extinguishing elements are in planning.
Innovative are the newly developed arc chambers. These can be configured as normally open, normally closed or in combination as changeover contacts.
The switching chambers are optimized for 300 A per main contact. By connecting two main contacts in parallel, a continuous thermal current of 600 A can be permanently carried. In addition, the series has a high rated short-time withstand current up to a maximum of 4,000 A. These values are achieved by very high contact forces.
Series CF contactors are equipped with 4 auxiliary contacts. The contact condition is illustrated using snap-action switches with positive opening. Different versions are possible, achieved with the switches S870.
The pull-in behaviour is controlled by a PWM controller independent of the coil voltage and temperature applied. This ensures a safe and low-bounce switch-on. In holding mode the PWM controller regulates the coil current. This significantly reduces power consumption and heating. At the same time the reliability of the contactor is increased.
Type of voltage | AC (f ≤ 400 Hz) |
Main contacts, configuration | 1...6 NO / NC |
Nominal voltage Un | CFxx-15-...: 1,500 V CFxx-30-...: 3,000 V |
Rated operating voltage Ue | CFxx-15-...: 1,500 V CFxx-30-...: 3,000 V |
Rated impulse withstand voltage Uimp | 25 kV |
Pollution degreeOvervoltage category | PD3 OV3 |
Conv. thermal current Ith | 200 A AC, f ≤ 400 Hz with plastic extinguishing element 200 A AC, f ≤ 400 Hz with metal extinguishing element 300 A AC, f ≤ 400 Hz with plastic extinguishing element 300 A AC, f ≤ 400 Hz with metal extinguishing element |
Component category | A2 |
Rated short-time withstand current Icw | 4 kA / T < 100 ms |
Auxiliary switches | 4x SPDT max. with mirror contact function, single-break Snap-action switches S870: AC-15: 230 VAC/1.5 A; DC-13: 60 VDC/0.5 A |
Coil voltage Us | 24 / 110 V DC |
Coil tolerance | 0.7 ... 1.25 x Us |
Mounting orientation | horizontal, vertical (do not mount upside down) |
Temperature range | -40° C ... +70° C |
Mechanical endurance | 1 million op. cycles |