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Timing Relays (RTW/ERWT)
8
Single Timing (RTW) or Multiple Timing (RTW-MAT/MBT) Relays
RTW RE (ON-delay) – After the relay is energized, the time (T) set on the
dial begins. After the end of the delay time, the output contacts switch on
and remain energized until the supply voltage is removed.
RTW PE (impulse ON) – After the relay is energized, the output contacts
switch on without delay and remain energized for the time (T) set on the dial.
RTW RD (OFF-delay) – With the relay energized, the output contacts
switch on without delay when the command contact is energized. When
the control supply voltage is removed, the output contacts return to their
original condition after the time (T), set on the dial, elapses.
RTW CI (flasher 2 adjustments start ON) – After the relay is energized,
the output contacts switch ON and OFF in cycles with the first cycle ON.
The upper dial sets the time (T
ON
) the contacts remain energized, while
the lower dial selects the time (T
OFF
) the contacts remain de-energized.
RTW ET (star-delta) – After the relay is energized, the star output contacts
switch on without delay and remain energized for the time (T) set on the
dial. After the fixed time tm, the delta terminals switch on and will remain
energized until the supply voltage is disconnected.
Operating mode Timing diagram
RTW CIL (flasher 1 adjustment ON) – After the relay is energized, the
output contacts switch ON and OFF in cycles with the first cycle ON.
A single selection determines the relay ON and OFF time.
RTW CID (flasher 1 adjustment OFF) – After the relay is energized, the
output contacts remain OFF. After the time selected on the dial elapses,
the contacts switch on, such behavior will continue in cycles. A single
selection determines the relay ON and OFF time.
RTW RDI (OFF-delay with no control) – After the relay is energized, the
output contacts switch on without delay. If the supply voltage is removed,
the selected time delay begins, and, when such is completed, the output
contacts switch OFF.
RTW CIR (flasher 2 adjustments start OFF) – After the relay is energized,
the output contacts switch ON and OFF in cycles with the first cycle OFF.
The upper dial sets the time (T
ON
) the contacts remain energized, while the
lower dial (T
OFF
) selects the time the contacts remain de-energized.
tm
tm
tm
tm
tm
tm
tm
tm
tm
Supply voltage
A1-A2 / A3-A2
Supply voltage
A1-A2 / A3-A2
Supply voltage
A1-A2 / A3-A2
Supply voltage
A1-A2 / A3-A2
Supply voltage
A1-A2 / A3-A2
Supply voltage
A1-A2 / A3-A2
Supply voltage
A1-A2 / A3-A2
Output Δ (K2)
25-28
Output Y (K1)
15-18
Supply voltage
A1-A2
Supply voltage
A1-A2
Output
15-18 / 25-28
Output
15-18 / 25-28
Output
15-18 / 25-28
Output
15-18 / 25-28
Output
15-18 / 25-28
Output
15-18 / 25-28
Output
15-18 / 25-28
Output
15-18 / 25-28
Control voltage
B1 / A2
Functions