Products Description

The FK10 series auxiliary switches are key control components designed specifically for medium- and high-voltage power systems and industrial automation scenarios. They are primarily used for the opening and closing signal control, interlocking protection, and circuit switching functions of high-voltage circuit breakers, vacuum contactors, and disconnectors. As the "signal hub" for the safe operation of power systems, this series of products ensures the accuracy of the main equipment's operating sequence through precise status feedback and reliable loop control, effectively preventing electrical accidents and providing stable protection for critical areas such as industrial power distribution and power transmission.

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Products technical specification

NO.	Item Name	Techcnial Specification
1	Rate voltage	AC 660V,DC 110V/220V
2	Rated current	10A/15A (conventional heating current), operating current 0.4A
3	Electrical load	Multiple configurations are available, including AC 220V 10A, AC 380V 6A, and AC 660V 2A.
4	Action parameters	Operating force ≤ 16N, reset force > 0.8N, operating stroke 4mm, auxiliary stroke > 3mm
5	Environmental conditions	Relative humidity ≤95% (daily average), acceleration ≤15m/s², no corrosive gases
6	Connection method	Spring clip connection, cage clamp connection, supports front installation
7	Protection level	IP20

Product Advantages

F10 series auxiliary switcheshas many advantages.

Extremely Reliable Contact System:

Utilizes silver alloy anti-oxidation contacts, possessing excellent conductivity and corrosion resistance, with a contact resistance <50mΩ, ensuring stable current transmission; the innovative self-operating planar sliding contact structure and fixed-gap design ensure consistent pressure (≥0.55N) for each pair of contacts, completely eliminating contact problems.

Superior Environmental Adaptability:

The sealed design completely isolates the contacts from the external environment, allowing stable operation in dusty and high-humidity environments; applicable temperature range covers -40℃ to +40℃, altitude ≤2000m, meeting the needs of harsh industrial scenarios.

Flexible Modular Design:

Employs a stacked structure, supporting adjustments to the number of contacts as needed (selectable configurations from 3NO2NC to 6NO6NC, etc.); customizable single-group contact delay function (delay gap ≥0.3mm); modular housing supports quick size changes to adapt to different installation space requirements.

Extended Service Life:

Mechanical life exceeds 3×10⁵ cycles, and electrical life exceeds 30,000 cycles. It has passed fully automated pressure testing and life verification, meeting the needs of high-frequency operation scenarios. The adaptive electromagnetic actuator ensures precise synchronization with the main switch, providing rapid and reliable response.

Comprehensive Safety Certification:

Strictly compliant with international and domestic standards such as GB/T 14048.1-2023 and IEC 60947-5-1, and certified by the ISO 9001-2000 quality system. It features overload and short-circuit protection, with a rated insulation voltage of 690V, ensuring safe operation.

‌Product Applications

F10 series auxiliary switches has many advantages.

Medium and High Voltage Switchgear: As a supporting accessory for KYN28A-12 medium-voltage switchgear, vacuum circuit breakers (VCBs), and disconnectors, it enables interlocking of opening and closing and signal feedback;

Industrial Control Circuits: Used for control switching of AC/DC vacuum contactors and electromagnetic switches, suitable for machine tools, water pumps, fans, and other power equipment;

Power Distribution Systems: Used as a transfer switch or combination switch in high and low voltage switchgear, responsible for signal circuit control and status monitoring;

Special Environmental Scenarios: Stable operation is achieved in dusty industrial environments such as mines, cement plants, and metallurgical plants thanks to its sealed contact design.

Product Structure Overview

Reliable Vacuum Circuit Breakers, Customized for Global Clients

As a specialized vacuum circuit breaker and relative accessories manufacturer in China, we have profuse designs of ABB and Siemens with series VCB, our price is very competitive because we are a manufacturer, we are the source.
We have more than 20 years of experience in this industry, main products as following:
12KV/24KV/40.5KV vacuum circuit breakers
VCB&Panel's assemblies and componnents

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