Delta Digital timer User Manual download pdf (Page 29)

Operating Modes / Functions

• Delay on Energisation (ON Delay):

• Cyclic Instant (Equal ON/OFF):

• Interval Timer:

• (Signal)-OFF delay:

The set time (Delay) starts

when the timer receives supply. The output relay energises at the

end of the pre-set time

On energisation, relay output

switches ON and OFF repeatedly for the set time. Cycle starts

with relay in energised condition. When supply is ,

the relay is reset.

On energisation of Timer, Output relay changes

the state for the time set. After completion of set time, output

relay de-energises. By switching off the supply, the Timer gets

de-energised & is ready for the next cycle of operation.

Timer is energised and relay is in OFF

condition. When control input is given through control contacts,

relay is energised. Delay period commences when control input

is removed. At the end of set time, relay is de-energised and load

is disconnected.

switched OFF

INST. RELAY

ON DELAY

CYCLIC

INTERVAL

OFF DELAY

RELAY

CONTROL

SIGNAL

RELAY

MULTIFUNCTIONAL

• ON Delay (Retentive): The set time (Delay) starts when timer

receives supply. The output relay energises at the end of the pre-

set time. If power fails during set time, the elapsed time will

retained by timer. Upon resumption of power, remaining cycle

will continue.

ON DELAY

(RETENTIVE/NO VOLT)

Relay

MODE FUNCTION

< <

T= t1 + t2 + t3

• Asymmetrical ON/OFF (Cyclic Instant): ON/OFF, can be

independently selected from 0.1 Sec. to 10 Hrs. On energisation,

relay output switches on and off repeatedly for the respective set

times. Cycle starts with relay in energised condition. By

removing supply, the relay is reset.

ASYMMETRICAL

ON/OFF

Relay R1, R2 Ton DLY

Toff

Relay R2 INST

• Star - Delta: The timer has a fixed transition time from Star to

Delta connection. On energisation, the output star relay energises

instantly. After completion of preset delay time, output Delta

relay energises after fixed pause time. This pause time (60, 90,

120, 150 ) provides the shortest possible 'current off'

pause and simultaneously ensures smooth change over.

±20 ms

STAR - DELTA

Relay

T Tp

Pause TimeSet Time

• True OFF Delay: On energisation the Relay O/P is in ON Position.

Timing delay period commences when supply to the True OFF

Delay Timer goes OFF. The O/P Relay de-energises at the end of

pre-set time.

TRUE OFF DELAY

Relay

MODE FUNCTION

(POWER OFF DELAY)

Relay

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Delta Digital timer User Manual Page 29

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