F10-8 Auxiliary Contacts Electric Pilot Switch For VCB

Structure of F10-8 Auxiliary Contacts

Dual-Blade Wiping Contact Design

The internal switching matrix uses an advanced dual-blade wiping contact mechanism. Upon actuation, the contacts slide past each other with constant spring pressure, creating a self-cleaning effect that removes microscopic surface oxidation. This configuration yields an exceptionally low voltage drop and prevents contacts from sticking or overheating under continuous 10A current loads.

Multi-Circuit Segmented Matrix

Unlike standard auxiliary switches, the 4-stage block architecture of the F10-8 allows for simultaneous control of multiple independent secondary loops. It can manage anti-pumping circuits, trip/close indicators, and SCADA telemetry inputs concurrently, reducing the need for auxiliary relays.

Rigid Kinetic Synchronization

The heavy-duty internal operating cam is directly keyed to the solid square drive shaft. This rigid mechanical coupling translates the high-speed motion of the breaker’s main contacts into instantaneous secondary circuit state changes, mitigating signal distortion and contact bounce.

Arc-Resistant Segmented Housing

The external shell is injection-molded from a high-density polymer with a superior Comparative Tracking Index (CTI). The segmented barriers between terminals isolate individual circuit paths, effectively containing localized switching arcs and preventing cross-terminal tracking in humid or polluted substation environments.

Model Variations & Mechanical Shaft Selection

To accommodate different mechanical depths within standard vacuum circuit breaker operating mechanisms, the F10-8 series is engineered in three specific hardware layouts to match diverse coupling designs:

Standard Drive Shaft (F10-8 Baseline): Optimized for direct, close-coupled integration within compact spring operating mechanisms.

Extended Drive Shaft (F10-8III Variant): Explicitly dimensioned to bridge the physical clearances found in central-mounted switchgear assemblies, such as the KYN28 series.

Working Conditions of F10-8 Auxiliary Contacts Electric Pilot Switch for VCB

1. Ambient temperature: not higher than +40 °C, not less than -40°C

2. Altitude: not exceed 2000m.

3. Relative humidity: daily average of not more than 95%, month average of not more than 90%. Saturated vapor pressure daily average of not more than 2.2 × 103MPa, month average not more than 1.8 × 103MPa.

4. The acceleration is not greater than 15m/ square seconds;

5. The air is not significantly affected by dust, smoke, corrosive and flammable gas, steam or salt fog contamination.

Dimensions of F10-8 Auxiliary Contacts Electric Pilot Switch for VCB

Electric pilot switch for VCB F10-8