c-mac.gif (1316 bytes)  star-delta relay RT18

Timing relay for star-delta switches
Automatic start
4 time ranges from 0,4 sec. to 10 min.
Time adjustment on built-in potentiometer
1-pole relay output with neutral centre position
100 msec. fixed neutral time
Phase-neutral or phase-phase supply voltage
Made in accordance with the CE and EMC regulations

rt18.jpg (6393 bytes)
The C-mac  time relay type RT18 is particularly made for the control of star-delta contactors.
When the supply voltage is connected, the relay activates in position 1-4, and the time period starts.
At the end of the set delay, the relay switches to neutral centre position for approx. 100 msec. Then it switches to position 1-3 and stays in this position, until the supply voltage is interrupted.

download datasheet (PDF-format)

Standard supply voltages:
24 V AC/DC
127 / 220 VAC
230 / 400 VAC
240 / 415 VAC
other ranges upon request

Standard time ranges:
0.4 - 15 sec
0.8 - 30 sec
1.5 - 60 sec
0.25 - 10 min
other ranges upon request

Specifications RT18.

Connections:
rt-til09.gif (4720 bytes)

Note:

At 24 V AC/DC supply,
pin 9 is not connected.
(pin2 is +)

Functional diagram:

rt-fun07.gif (3202 bytes)