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

- These relays can be used in seismic environments thanks to their excellent resistance to shock and vibration.

One-shot function: Pulse time adjustable by a potentiometer from 0.1 s to over an hour. 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:

- Control and signalling functions in power stations

- High-voltage and medium voltage substations

- Rail transport

- Industries with continuous production processes.

Equipped with magnetic blow-out and a large contact clearance. Highly effective for switching DC loads and providing a warranty for 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 (around 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 one-shot function
• 4 changeover contacts, 10 A
• Time setting from 0.1 s to over one hour using a potentiometer
• 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.