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VTT12 - Definite Time Delay Relay

Download the VTT12 datasheet PDF. This datasheet also covers the VTT11 variant, as both devices belong to the same definite time delay relay family and are provided as variant models within a single manufacturer datasheet.

General Description

A stabilised voltage is applied to a resistance/capacitance circuit.

The potential developed across the capacitor is applied to a transistor switching circuit which, in turn, operates an attracted armature relay when the potential reaches the trigger level.

Key Features

  • Consistent accuracy.
  • Reliability.
  • Low burden.
  • Reduced maintenance.
  • Immunity to transients and surges; withstands 5 kv impulse voltage test.
  • Relays with heavy-duty magnetic blow-out contacts also available.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (VTT11-ALSTOM.pdf) that lists specifications for multiple related part numbers.

Datasheet Details

Part number VTT12
Manufacturer ALSTOM
File Size 683.11 KB
Description Definite Time Delay Relay
Datasheet download datasheet VTT12 Datasheet

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Other Datasheets by ALSTOM

Part Number Description
VTT11 Definite Time Delay Relay

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
PROTECTION Type VTT 11, 12 Definite Time Delay Relay VTT is a static time delay relay which is particularly suitable for applications requiring large number of operations and consistent accuracy with little or no maintenance over long periods. It is also commonly used in industrial processes. Features • Consistent accuracy • Reliability • Low burden • Reduced maintenance • Immunity to transients and surges; withstands 5 kv impulse voltage test • Relays with heavy-duty magnetic blow-out contacts also available Description A stabilised voltage is applied to a resistance/capacitance circuit. The potential developed across the capacitor is applied to a transistor switching circuit which, in turn, operates an attracted armature relay when the potential reaches the trigger level.