The TOK series plug-in relays (4 changeover contacts) are based on the OK relay platform and are designed and built with materials and solutions that give them excellent endurance and robustness specifications:

- Suitable for use in harsh working environments and when subjected to severe thermal shocks. Above all, these relays can be used in seismic environments thanks to their excellent resistance to shock and vibration.

Cyclic symmetrical flashing function, switching time selectable from 0.1 seconds to over an hour. Switching time selector comprising a single-turn potentiometer. Switching time adjustment from 20 to 100% of full scale. The excellent electrical and mechanical performance of these relays allows them to be used in the most demanding mains, such as:

- Control and signalling functions in power stations

- High-voltage and medium voltage substations

- Rail transport

- Industries with production processes operating in continuous mode.

Equipped with magnetic blow-out and a large contact gap: highly effective for switching DC loads and ensuring high resistance to surge (5 kV) between open contacts. Patented operating mechanism: mechanical life > 100,000,000 operations. The contacts are mounted on individual, independent blades designed to guarantee high-pressure values (in the order of 0.8 to 1 N). The contact is sliding and, by design, self-cleaning.

Compliance with standards

• EN 61810-1, EN 61810-2, EN 61810-7 Electromechanical elementary relays
• EN 61812-1 Time relays
• EN 61812-1 Time relays
• EN 60695-2-10 Fire hazard testing
• EN 50082-2, EN 61000-4 Electromagnetic compatibility
• EN 60529 Degrees of protection provided by enclosures
• EN 60077 Electric equipment for rolling stock - General service conditions and general rules
• EN 50155 Electronic equipment used on rolling stock
• EN 61373 Shock and vibration tests, category 1, class B
• EN 45545-2 Requirements for fire behaviour of materials and components - Product No. EL10 - Requirement R26, V0
• ASTM E162, E662 Standard test method for surface flammability of materials; Standard test method for specific optical density of smoke

• Plug-in relays with cyclic symmetrical flashing function
• 4 changeover contacts, 10 A
• Time setting from 0.1 s to over one hour, with button control
• Solid and robust construction for intensive use
• Excellent resistance to shock and vibration
• Large gap between open contacts, 5 kV insulation
• Mechanical life of 100,000,000 operations
• Transparent cover equipped with an extraction handle
• Numerous configuration and customization options
• Wide choice of associated bases and locking springs

To fully meet your expectations, a range of accessories is available that is compatible with your equipment. Feel free to add them to your quote request to obtain a complete and tailored solution.