Siemens NXPLUS C Installation And Operating Instructions Manual page 124

Installation
Faults during test
operation
Fault clearing
124/172
• The three-position switch does not move to the desired position during the first electrical
operation. (Example: The three-position switch moves to the EARTHING CLOSED position
instead of the DISCONNECTING CLOSED position)
• The control system of the three-position switch has detected the incorrect execution of the
command and is in faulty mode. In this condition, no further switching operations are
possible.
Check the polarity of the auxiliary voltage and the motor connection.

Switch the operating mechanism manually back to the basic position.

Reset fault mode (2 possibilities):

- Switch the auxiliary voltage off and on
- Operate the reset button (covered opening on the device front)
The position indicator for the DISCONNECTING and EARTHING functions shows OPEN.
r
The three-position switch can be put into operation again.
r
Perform test operation of the three-position switch.

Three-position disconnector
1
Initial situation
3
Switch the three-position switch from EARTHED to
OPEN position (insert the operating lever and turn
180° counter-clockwise).
Revision 05 • INSTALLATION AND OPERATING INSTRUCTIONS • NXPLUS C Wind • 802-9074.9
2
Push the interrogation lever downwards and push
the control gate to the right.
4
Remove the operating lever (the interrogation lever
and the control gate return to their initial position).