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On Delay Timer and Star Delta Timers On Delay Timers Mounting: 1) DIN rail mounting 2) Screw mounting Size: (in mm) 22.5(W) x 75(H) x 101(D) Housing: ABS Plastic Weight: 115 gms Operating Temp: 0 - 50oC Humidity: Upto 95% RH Specifications: Accuracy: Setting accuracy: +/- 5% of full scale Repeat accuracy: +/- 0.5% or 50 msec whichever is greater LED Indication: 1) Power 'ON' 2) Relay 'ON' Reset: On interruption of power Reset time: Less than 100 msec Relay Rating: 5A @ 230V AC / 24V DC, resistive Mode: ON Delay/Interval Description: GE introduces Multirange universal voltage On Delay Timers. Easy installation, maintenance and high reliability at very reasonable price make these timers an ideal choice for electrical designers. These timers are used in various applications like control panels, plastic moulding machines, motor starters and various other time delay requirements. The HODT2COZ timers are slim, DIN rail/screw mounting preset timers. They are covering wide time ranges. DIP switches are provided for setting the required range and mode. Time setting within the range is adjustable by a transparent knob on a calibrated dial. The HODT2COZ is a Multirange universal voltage On Delay Timer specially designed to cover wide time range and different voltage requirements. The time range and desired voltage are selected from DP switches. It has got 2 change over contacts. ● Multirange models: 4 ranges ● Universal voltage type: 24V AC/DC to 230V AC/DC (tolerance: -10% to + 15%) ● Repeat accuracy better than 0.5% ● Finger guards for safety ● DIN Rail mounting ● Slim space saving construction FEATURES: F 263

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Page 1: On Delay Timers - System Controls & Switchgears Delay Timers.pdf · GE introduces Multirange universal voltage On Delay Timers. ... star delta starters, insist on GE make CL & CK

On Delay Timer and Star Delta Timers

On Delay Timers

Mounting:

1) DIN rail mounting2) Screw mountingSize: (in mm)22.5(W) x 75(H) x101(D)Housing:

ABS PlasticWeight: 115 gmsOperating Temp:

0 - 50oCHumidity:

Upto 95% RH

Specifications:Accuracy:

Setting accuracy: +/- 5% of full scaleRepeat accuracy: +/- 0.5% or 50 msecwhichever is greaterLED Indication:

1) Power 'ON' 2) Relay 'ON'Reset:

On interruption of powerReset time: Less than 100 msecRelay Rating:

5A @ 230V AC / 24V DC, resistiveMode:

ON Delay/Interval

Description:

GE introduces Multirange universal voltage On Delay Timers.

Easy installation, maintenance and high reliability at very

reasonable price make these timers an ideal choice for

electrical designers. These timers are used in various

applications like control panels, plastic moulding machines,

motor starters and various other time delay requirements.

The HODT2COZ timers are slim, DIN rail/screw mounting

preset timers. They are covering wide time ranges. DIP

switches are provided for setting the required range and

mode. Time setting within the range is adjustable by a

transparent knob on a calibrated dial.

The HODT2COZ is a Multirange universal voltage On Delay Timer specially

designed to cover wide time range and different voltage requirements. The time

range and desired voltage are selected from DP switches. It has got 2 change

over contacts.

● Multirange models: 4 ranges

● Universal voltage type: 24V AC/DC to

230V AC/DC (tolerance: -10% to + 15%)

● Repeat accuracy better than 0.5%

● Finger guards for safety

● DIN Rail mounting

● Slim space saving construction

FEATURES:

FF

263

Page 2: On Delay Timers - System Controls & Switchgears Delay Timers.pdf · GE introduces Multirange universal voltage On Delay Timers. ... star delta starters, insist on GE make CL & CK

The HSDT2CO Series and BSDT Series are Star Delta Timers which have been designed specifically to meet the requirements

for starting squirrel cage motors by star-delta change over. They have a run up time settable from 0-30 sec and give a fixed 50msec (40 to 70ms) changeover delay time. This changeover delay prevents the overlapping operation of star and delta contactors. This in turn prevents possible sparking, thus protecting contactors and motors from damage. The output is 1 NO contact each for star & delta relay for HSDT2CO series timer and 1 NO contact for BSDT series timer

Repeat accuracy better than 0.5%

Finger guards for safety

DIN rail / Screw mounting

Slim space saving construction

FEATURES:

GE has the widest range of Power Contactor in India today (6A to 825A, AC3). To ensure trouble free and smooth operations of your star delta starters, insist on GE make CL & CK contactors with HSDT2CO Star-Delta Timer (with 2 changeover contacts) and BSDT Star-Delta Timer (with 1 changeover contact)

Operating Principle - Two changeover - HSDT2CO

Timer gets the supply as soon as switch S2 is closed. Star contact (15/18) of the timer closes which in turn gives supply to the star contactor K1 and the set runup time starts. At the same time mains contactor K2 is switched on via the auxiliary contact of star contactor K1 and then becomes self-holding via its own auxiliary contacts. Star contact of the timer opens at the end of run-up time, thus switching off the supply voltage of the star contactor. The second delay starts after star contactor opens. At the end of this delay, the delta contact (25/28) of the timer closes, starting the delta contactor K3. The delta contactor, thereafter remains on until power is discontinued.

Operating Principle - One changeover - BSDT

Star contactor K1 closes and the set run-up time starts when the supply voltage is applied. Mains contactor K2 is switched on via the auxiliary contacts of star contactor K1 and then becomes self-holding via its own auxiliary contact 13/14. Simultaneously, auxiliary contacts 21/22 of mains contactor K2 open, thus connecting the star-delta timer and the star contactor via its auxiliary contacts 43/44 to the supply. Contacts 15/16 of star-delta timer open after the run-up time, thus switching off the supply voltage of the timer and of the star contactor. Contact 15/16 of star-delta timer remains open for approx. 50msec and resets after that time to ensure that star contactor K1 has opened. Delta contactor K3 has been connected via auxiliary 22/21 of star contactor K1.

On Delay Timer and Star Delta Timers

FF

263

FF

264

STAR DELTA TIMERS

Page 3: On Delay Timers - System Controls & Switchgears Delay Timers.pdf · GE introduces Multirange universal voltage On Delay Timers. ... star delta starters, insist on GE make CL & CK

On Delay Timer and Star Delta Timers

FF

265


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