ZWU-35 series outdoor vacuum circuit breakers with spring-motor drive are designed for switching of electrical high-voltage circuits in normal and emergency conditions of three-phase alternating current networks with insulated or partially grounded neutral points with rated voltage 35 kV and frequency 50 Hz.
Switches ZWU-35 are used as accessories for open 35 kV switchgear of complete transformer substations as well as for expansion of existing substations and replacement of obsolete air and oil circuit breakers on them.
Main technical parameters of the ZWU-35:
| Parameter name | Value |
| Rated voltage, kV | 35 |
| Highest working voltage, kV/td> | 40,5 |
| Rated current, A | 1600, 2000, 2500 |
| Rated breaking current, kA | 20, 25, 31,5 |
| Rated test voltage one-minute test voltage with frequency 50 Hz, kV | 95 |
| Rated test voltage lightning impulse voltage, kV | 195 |
| Rated aperiodic component percentage, % not more | 40 |
| Service life, years | 30 |
| Weight, kg, not more | No more 800 |
They are manufactured according to drawings and technology of SIEYUAN ELECTRIC CO., Ltd. and to international standards – IEC 62271-100, GOST R 52565.
Download questionnaire for ZWU series vacuum breakers with spring motor drive.