Two Wire Electronic Time Delay Switch

Product Overview

The Clipsal 31/2031VETR is a push-button electronic time delay switch featuring a toggle action 'time cycle' cancel and remote control capabilities. It is designed to control lighting that might otherwise be left on unnecessarily, offering significant energy savings in applications such as staircases, hallways, and classrooms. The 31/2031VETR is a two-wire device, meaning it does not require a direct neutral connection.

This time delay switch is suitable for both incandescent and fluorescent loads, including those with built-in power factor correction capacitors. For other types of loads, please consult your nearest Clipsal office or representative for guidance.

Important Notes

Note 1: Off-State Leakage Current

Two-wire devices draw power through the load, resulting in current flow even when the load is in the 'off' state. The 'off' state capacitive leakage current of this device may be significant for certain loads. For incandescent loads (down to 15W), this leakage is generally negligible because the resistance of a cold incandescent light globe is much lower than a warm one (up to 12 times), leading to minimal power consumption in the 'off' state.

For fluorescent lamp loads with power factor correction, the 'off' state leakage current is bypassed by the correction capacitor and does not cause active power dissipation. Fluorescent lamp loads without a power factor correction capacitor require a mains-rated capacitor (minimum 220nF 250V a.c., X or Y rated) connected in parallel with the load. Electronically ballasted fluorescent lamp loads require a mains-rated capacitor (minimum 470nF 250V a.c., X or Y rated) in parallel with the load. This capacitor is not needed if the electronic ballasts have sufficient internal capacitance (typically around four ballasts) or if an additional resistive load is present.

Note 2: Turn-On Delay

If the push-button is pressed consecutively to turn the load off and then on again, the turn-on action may be delayed by up to seven seconds. This delay is due to an automatically inserted recharge cycle within the unit. This cycle does not affect the unit's ability to accept subsequent turn-on commands.

Operation

Pressing the push-button when the load is off will turn the load on. Pressing the push-button when the load is on will turn the load off. The timer can be reset by performing consecutive turn-off and turn-on functions (as described in Note 2). The load cannot be turned on for 30 seconds after power is applied to the device, such as after a power failure/return, initial installation, or bulb replacement.

The built-in light indicator shows the status of the load: it is illuminated when the load is off and off when the load is on. If the push-button is pressed to turn the load on shortly after connecting the timer to the mains or after a long timeout period, the timer will activate after its warm-up period has elapsed. In such cases, the turn-on command is memorized, and its acceptance is confirmed by the indicator light turning off.

Setting the Timer

Warning: For safety reasons, setup should be performed with the timer isolated from the mains supply.

The timer's settings are adjusted using an eight-way switch accessible through a window at the back of the enclosure. Two timer ranges can be selected using switch 1:

• Short Range: Switch 1 is set in the direction of the [red arrow]. Time can be set via switches 2 to 8 from 15 seconds up to 31 minutes and 45 seconds. Achievable settings are multiples of 15 seconds (e.g., 15 sec, 30 sec, 45 sec).
• Long Range: Switch 1 is set in the direction of the [green arrow]. Time can be set via switches 2 to 8 from 2 minutes up to 4 hours and 14 minutes. Achievable settings are multiples of 2 minutes (e.g., 2 min, 4 min, 6 min).

Switches 2 to 8 are used to add specific time intervals to the total time delay. Each switch is marked with two time interval values: one in green (added for the long range) and one in red (added for the short range).

Switch Diagram Description: A visual representation shows eight switches labeled 1 through 8. Switch 1 has a slider that can be moved towards a red marker or a green marker. Switches 2 through 8 are toggle switches with ON/OFF positions. Below the switches, time intervals are listed: RED values (15sec, 30sec, 1min, 2min, 4min, 8min, 16min) and GREEN values (2min, 4min, 8min, 16min, 32min, 64min, 128min).

Setting Examples

Example 1: Required time delay, 6 minutes and 30 seconds (6.5 minutes)

Initially, set all switches to the OFF position. Since 6.5 minutes is lower than the maximum setting for the short range, set the range switch (No. 1) to the short range [red arrow]. The highest time value lower than 6.5 minutes is 4 minutes; set switch 4 to ON. The remaining time required is 6.5 - 4 = 2.5 minutes. The next highest value lower than 2.5 minutes is 2 minutes; set switch 3 to ON. The remaining time required is 6.5 - 4 - 2 = 0.5 minutes (30 seconds); set switch 2 to ON.

Example 1 Switch Setting Diagram Description: A diagram shows the switches set for this example. Switch 1 is set to SHORT. Switches 2, 3, and 4 are in the ON position. The total time set is indicated as 4 min + 2 min + 30 sec = 6.5 min.

Example 2: Required time delay, 3 hours and 20 minutes

First, convert the required time to minutes: 3 hours * 60 minutes/hour + 20 minutes = 200 minutes. Set all switches to OFF initially. Since 200 minutes is higher than the maximum setting for the short range, set the range switch (No. 1) to the long range [green arrow]. The highest time value lower than 200 minutes is 128 minutes; set switch 8 to ON. Remaining time: 200 - 128 = 72 minutes. The next highest value lower than 72 minutes is 64 minutes; set switch 7 to ON. Remaining time: 72 - 64 = 8 minutes. Set switch 4 to ON for 8 minutes.

Example 2 Switch Setting Diagram Description: A diagram shows the switches set for this example. Switch 1 is set to LONG. Switches 4, 7, and 8 are in the ON position. The total time set is indicated as 128 min + 64 min + 8 min = 200 min (3 hours 20 minutes).

Wiring Details

The timer is wired as illustrated in the accompanying diagram. Additional switches can be installed in parallel for remote operation. Due to cable capacitance, the maximum recommended length for the remote control wire is 100 meters.

Wiring Diagram Description: A diagram shows the 31/2031VETR device with terminals labeled. 'LINE' and 'NEUTRAL' are input power connections. 'LOAD' is the output to the controlled device. 'REMOTE' terminals are provided for connecting remote control push buttons.

Specifications

Manufacturer Information

Clipsal Australia Pty Ltd

A member of Schneider Electric

Contact us: clipsal.com/feedback

National Customer Care Enquiries:

Tel: 1300 2025 25

Fax: 1300 2025 56

Document Reference: F1178/02

Website: clipsal.com

Clipsal Australia Pty Ltd reserves the right to change specifications, modify designs and discontinue items without incurring obligation and whilst every effort is made to ensure that descriptions, specifications and other information in this catalogue are correct, no warranty is given in respect thereof and the company shall not be liable for any error therein. The identified trademarks and copyrights are the property of Clipsal Australia Pty Ltd unless otherwise noted.

Document Version: CLIPCOM 18688 June 2009