Page 34 - EPR Catalog 2015

CT-E range
Function diagrams

B OFF-delay, without auxiliary voltage CA Impulse-ON (Interval)
(true delay on break) CT-ARE
1 CT-VWE, CT-MFE

The OFF-delay function without auxiliary voltage does not The output relay energizes immediately when control sup-
require continuous control supply voltage for timing. ply voltage is applied and de-energizes after the selected
Applying control supply voltage, energizes the output relay. time delay is complete. If control supply voltage is inter-
If control supply voltage is interrupted, the OFF-delay starts. rupted before the time delay is complete, the output relay
When timing is complete, the output relay de-energizes. If de-energizes and the time delay is reset.
control supply voltage is re-applied before the time delay is Control input A1-Y1 has to be jumpered, when this timing
complete, the time delay is reset and the output relay remains function is selected.
energized.
Control supply voltage must be applied for the minimum CT-VWE:
energizing time (200 ms), for proper operation.

A1-A2/B1 2CDC 252 133 F0205 A1-A2/B1 2CDC 252 134 F0205
15-18 15-18
15-16 15-16

green LED green LED
red LED
t = adjusted time delay
t <t
<t
t = adjusted pulse time

t CT-MFE:

A1-A2 2CDC 252 135 F0205
A1-Y1
15-18
15-16
green LED
red LED

t

t = adjusted pulse time

CB Impulse-OFF, without auxiliary voltage CB Impulse-OFF, with auxiliary voltage
(True trailing edge interval) CT-AWE (Trailing edge interval) CT-AWE

The Impulse-OFF function without auxiliary voltage does not This function requires continuous control supply voltage
require continuous control supply voltage for timing. for timing. Timing is controlled by control input A1-Y1. If
If control supply voltage is interrupted, the output relay the control input is opened, the output relay energizes and
energizes and the OFF time starts. When timing is complete, timing begins. When the selected time delay is complete,
the output relay de-energizes. If control supply voltage is the output relay de-energizes. Interrupting control supply
re-applied before the time delay is complete, the time delay is voltage or closing control input A1-Y1, before the time delay
reset and the output relay de-energizes. is complete, de-energizes the output relay and resets the time
Control supply voltage must be applied for the minimum delay.
energizing time (200 ms), for proper operation.

A1-A2 t 2CDC 252 138 F0205 A1-A2
15-18 2CDC 252 137 F0205A1-Y1
15-16 15-18
green LED 15-16
red LED green LED
red LED
t = adjusted pulse time
t

t = adjusted pulse time

1/23 ABB | Catalog Electronic Products and Relays 2015 | 2CDC 110 004 C0210