With the CA series contactors, Schaltbau provides a switchgear concept for the safe disconnection of inverters.
In the New Energy sector, the CA contactor safely disconnects the central inverter from the mains and reconnects it to the mains when required. However, the switchgear can also switch much higher frequencies than the 50 to 60 Hertz customary in the grid: for example, up to 400 Hertz in the drive system of multiple units. Due to their technical features, compact design, high switching functionality and reliability, CA contactors can be used flexibly and with an eye to the future. The product family includes different versions, matched to a wide range of applications.
The CA works in a wide range of AC applications. For example, it connects the central inverter of a photovoltaic system with the grid or works as a traction contactor in electrical multiple units. The CA complies with the following railway standards:
Snap-action switches can report the switch state of the main contacts to the higher-level control system. Different versions are possible, achieved with the switches S870, S970 or S826.
The switching devices are used on the AC side in the output circuit of inverters and are capable of disconnecting large loads. The switchgear is thus a cost-effective alternative to circuit breakers for safely disconnecting central inverters from the mains and reconnecting them to the mains.
CA contactors are required for reliable disconnection of inverter-fed permanent magnet drive motors (PEM) in the event of a fault, for example in the event of a short circuit in the output circuit of the traction converter. The contactors are particularly suitable for permanently excited drive motors with higher supply voltage frequencies.
Type of voltage | AC (f ≤ 400 Hz) |
Main contacts, configuration | CA1315/04, CA1330/08: 3 x NO CA1115/04, CA1130/08: 1 x NO |
Nominal voltage Un | CA1315, C1115: 1,500 V CA1330, CA1130: 3,000 V |
Rated operating voltage Ue | CA1315, C1115: 1,800 V CA1330, C1130: 3,600 V |
Rated insulation voltage Ui | CA1315, C1115: 2,000 V CA1330, C1130: 4,800 V |
Rated impulse withstand voltage Uimp | CA1315, C1115: 15 kV CA1330, C1130: 25 kV |
Conv. thermal current Ith | CA1xxx/04: 350 A, 540 A CA1xxx/08: 800 A |
Rated short-time withstand current Icw | Upon request, optimized for switching off 400 Hz |
Short-circuit breaking capacity | Upon request, optimized for switching off 400 Hz |
Rated short-time withstand current Icw | Upon request, optimized for switching off 400 Hz |
Contact material main contacts | AgSnO2 |
Aux. contact | 1x S870 (a1), 1x S870 (b0), 2x S826 or 4x S826 or 2x S970 (a1), 2x S970 (b0) or 1x S970 (a1), 1x S970 (b0) |
Coil voltage Us | 24, 36, 48, 72, 110 V |
Coil tolerance | -30% ... +25% Us |
Coil power consumption | 100 W/75 W and 280 W/27 W resp. cold/warm |
IP rating (IEC 60529) | IP00 |
Mechanical endurance | > 500.000 operating cycles |
Vibration / Shock (IEC 61373) | Category 1, Class B |
Mounting orientation | any |
Temperature range | -40 °C ... +70 °C |
Storage temperature | -40 °C ... +85 °C |
Weight | CA1315/04: 20 kg CA1130/08: 25 kg |