General

CA-VS1 series medium voltage vacuum circuit-breakers with lateral operating mechanism feature the separate pole construction technique.

Each pole houses a vacuum interrupter which is encased in the resin when the cylinder is moulded thanks to a special manufacturing process.

This construction method protects the vacuum interrupter from shock, pollution and condensation.

The operating mechanism is the EL trip-free stored energy type with independent opening and closing regardless of the operator’s action. The EL operating mechanism is widely used in all CA-VS1 series circuit-breakers with frontal control.

The circuit-breaker can be remote controlled when fitted with dedicated electrical accessories (gearmotor, opening and closing release).

The operating mechanism, the three poles and the current sensors (if installed) are assembled on a metal frame without wheels. The construction is extremely compact, strongly built and low in weight.

CA-VS1 series circuit-breakers with lateral operating mechanisms are life-long sealed pressure devices (Standards IEC 62271-100 and CEI EN 62271-100).

CA-VS1 vacuum circuit breakers have been designed for indoor use and air insulated switchboards.

Their switching capacity is sufficient to handle any conditions arising from switching of equipment and system components under normal operating and fault conditions, particularly short-circuits, within the parameters of their technical data. The vacuum circuit-breakers of type CA-VS1, designed in column form, can be supplied both as individual units for fixed installation and mounted on chassis. Vacuum circuit-breakers are characterized by their simple and robust construction. They have a long life expectancy. There is no adverse effect on the vacuum, even from frequent switching of operating and short-circuit currents.

Advantages

Vacuum circuit-breakers have particular advantages for use in networks where there is a high switching frequency in the working current range and/ or where a certain number of short- circuit breaking operations are expected. CA-VS1 vacuum circuit- breakers are suitable for auto reclosing and have exceptionally high operating reliability and long life. The circuit- breakers are notable for their compact design, small dimensions together with high capacity. The operating mechanisms have a low maintenance requirement and the interrupters are maintenance- free throughout their service lives. They are well suited to all load breaking operations which occur in practice, and in particular:

• Short-circuit currents;
• Overhead lines under load and, no-load conditions;
• Cables under load and no-load conditions;
• Transformers under load and no-load conditions;
• Generators under load and no-load conditions;
• Ripple control system;
• Capacitor banks(also parallel switching) and Motors with starting currents above 600A;