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Trip Curve
Figure 5: Operating Charateristics of 3UA5/6 Relays
Operation
1. For Starting the Motor, press Green
push button, marked "I"
2. For Stopping the Motor, press Red
push button, marked "O"
3. For Relay Reset: First switch off the
Starter, open the door and then
press blue push button, marked
"Reset", for resetting, after the relay
has tripped due to overload.
4. In case if you want the Starter in
"Self Reset" mode, the blue knob on
Relay is to be pressed and rotated
in anticlockwise direction, so that it
comes in position "A" and its edge
flush with the relay surface. In this
mode if the relay trips on overload,
it will be automatically reset in
maximum 4 minutes.
The Motor can be restarted only
after the relay is reset.
H - Hand Reset
A - Auto Reset
Figure 6: Relay Front View
Figure 7: Wiring Diagram
Q1 : Line Contactor
Q2 : Star Contactor
Q3 : Delta Contactor
S1 : 'ON' Push Button-I
Blue
S0 : 'OFF' Push Button-O
Reset
S4 : 'Reset' Button (of relay)
Knob
K1 : Bimetal Relay
Q4 : Star Delta Timer
Maintenance
1. Keep the interior dust free.
2. Check the tightening of terminal
screws time to time.
3. No Maintenance is needed for
overload relay and Timer. Do not
open them.
4. If the Contactor hums, clean the
magnet pole faces with soft cloth.
5. Replace contacts of the contactor
if they are severly pitted or when
only 40% original contact tip
remains.
6. For details of contactor maintenance
refer to - "Guide to contactor
Installation & Maintenance".
3
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