The PELC PT429-8 is designed for use in automation panels to start asynchronous three-phase motors. It provides direct contacts for the star, delta, and main relays, and includes contacts for START/STOP push buttons and an automatic operation switch — replacing the full electrical starting automation in a single device.

Mounted on a standard 8-pin bulb-type relay socket (code 525086, sold separately), the unit operates as a delay timer for star-to-delta switching (3–30 sec) and also inserts an intermediate transition time (20–300 ms) to prevent simultaneous activation of the power relays and avoid electromagnetic coupling during switchover.

Key Features

• Contacts for direct activation of star, delta, and main contactors
• Integrated START/STOP button and automatic operation switch contacts
• Adjustable star-to-delta delay: 3–30 sec
• Adjustable intermediate transition time: 20–300 ms to prevent relay overlap
• Varistor protection against overvoltage and lightning
• POWER ON and RELAY ON LED indications
• Mounts on standard 8-pin bulb-type socket (code 525086)

Product Benefits

• Combines timer and contactor control in one unit, reducing panel wiring complexity
• Transition time adjustment eliminates electromagnetic coupling between star and delta relays
• Wide delay range (3–30 sec) accommodates different motor sizes and load conditions
• Varistor protection extends device life in environments with voltage spikes
• LED indicators allow quick status confirmation without opening the panel

Technical Specifications

• Power Supply: 230V AC / 50Hz
• Relay Outputs: Three independent changeover contacts, 10A / 250V AC (Cat. AC1)
• Delay Time Range: 3–30 sec
• Transition Time Range: 20–300 ms
• Connection Socket: Bulb type, 8-pin
• Protection: Varistor (overvoltage and lightning)
• Indications: POWER ON, RELAY ON
• Operating Temperature: -20 to +50°C
• Enclosure: Plastic, 42×89×94mm, IP41

Why You'll Love It

• All-in-one solution replaces separate timers and wiring for star-delta motor starting
• 8-pin socket mounting allows quick replacement without rewiring
• IP41 plastic enclosure protects against dust and dripping water in panel environments
• Package includes 1× PELC PT429-8 Dual Interval Star-Delta Starter