Switch vacuum VB4-P U2

• A sealed molded pole is used;

• if there is an operating current at the substation, the drive spring is charged automatically;

• design features of the VB4-P circuit breaker make it possible to reduce the overvoltage level to 1.4 times the rated voltage by spreading the contacts according to a given diagram;

• the shape of the lever and the cam of the drive when the state is on exclude the opening of contacts and their "bounce";

• the energy stored in the spring is sufficient for a single AR;

• it is possible to install additional opening electromagnets in the circuit breaker: overcurrent release of direct action and additional undervoltage release;

• the circuit breaker has the ability to control the integrity of the on and off circuits with direct control of the on-off electromagnets;

• easy and convenient access to circuit breaker drive elements and auxiliary contacts;

• the absence of electronic components and electrolytic capacitors prolongs the service life of the VB4-P circuit breaker;

• circuit breaker design allows to install a motor drive inside the cell for remote control of the circuit breaker movement in the cell (roll-in-roll-out from working to control position);

• The design of the spring drive of the circuit breaker ensures its minimum power consumption. When the switch is turned on and off, there are no significant current surges in the secondary circuits (the on / off current is not more than 2 A)

• the parameters of each circuit breaker during the acceptance tests are controlled using a tuning stand, which allows you to control and adjust the mechanical characteristics of the drive - the time parameters of the movement of the contacts, the simultaneity and speed of closing the pole contacts, the clamping force, etc.;

• after completion of the assembly, the parameters of each circuit breaker are re-controlled by an accredited electrotechnical laboratory, including high-voltage tests. The structure of the accompanying documentation sent to the customer together with the circuit breaker includes the protocol of its acceptance tests.