H4DT-10

H4DT-10 – Product Description

• The H4DT-10 is an 11-pin ON-delay electronic timer from EAPL’s H4D series.

• Provides a time delay function where the relay operates after a preset time once power is applied.

• Features a large transparent dial with red pointer for easy and precise adjustment.

• Designed with a compact plug-in construction for quick installation and replacement.

• Equipped with LED indicators for power and operation status, ensuring ease of monitoring.

Key Specifications

• Function: ON-delay timer.

• Supply Voltage: Universal supply range 24 V to 240 V AC and 24 V to 220 V DC.

• Time Range: Adjustable from 0.1 seconds to 10 minutes depending on dial setting.

• Output: 2 Change-over (C/O) relay contacts, rated 5 A at 250 VAC / 28 VDC resistive load.

• Power Consumption: Approx. 5 VA (AC) or 1 W (DC).

• Accuracy:

  • Setting accuracy: ±10% of full scale.

  • Repeat accuracy: ±1%.

• Indicators: LED indicator for power ON and relay operation (UP/RUN).

• Environmental Ratings:

  • Operating temperature: –10 °C to +55 °C.

  • Storage temperature: –25 °C to +80 °C.

  • Humidity: Up to 85–95% RH at 40 °C.

• Service Life:

  • Mechanical: ≥1 million operations (no load).

  • Electrical: ≥100,000 operations at rated load.

• Insulation Resistance: >100 MΩ at 500 V DC.

• Dielectric Strength: Withstands up to 2.5 kV AC between input/output, 1.5 kV AC between relay contacts and control.

• Mounting: Plug-in 11-pin base.

• Dimensions: Approx. 48 mm × 48 mm × 105 mm.

Applications

• Sequential starting of motors to limit inrush current.

• Pumps, fans, and compressors requiring delayed start.

• Lighting and heating systems requiring ON-delay control.

• DG set and transformer panels for delayed relay switching.

• Control & Relay (C&R) panels and MCC panels requiring ON-delay functions.

• General industrial automation and process machinery with time-delay needs.

Summary

• The H4DT-10 is a compact ON-delay timer with a selectable range up to 10 minutes.

• Offers wide supply voltage compatibility, high accuracy, and reliability.

• Easy to install with plug-in 11-pin base and simple dial operation.

• Well-suited for MCCs, automation systems, transformer/DG panels, and industrial control requiring precise ON-delay timing.