Checking The Accessories; Instructing Operating Personnel; Function Test / Test Operation - Siemens NXPLUS C Installation And Operating Instructions Manual

Installation
Mechanical function test
Readjusting the
freewheel of circuit-
breaker pushbutton
120/172
17.2

Checking the accessories

Make sure that the following accessories are ready to hand:

- Operating instructions
- One operating lever for the three-position disconnector, for the DISCONNECTING function
- One operating lever for the EARTHING/READY-TO-EARTH function (painted red)
- Hand crank for charging the circuit-breaker closing spring (with freewheel)
- Adapter for emergency operation (option only for three-position disconnector with motor
operating mechanism)
- Double-bit key with a diameter of 3 mm
- Circuit diagrams
- Torx screwdriver T25
- 1 adapter for the three-position disconnector, for the DISCONNECTING function
- 1 adapter for the three-position disconnector, for the EARTHING/READY-TO-EARTH
function (painted red)
17.3

Instructing operating personnel

Instruct operating personnel in theory and practice of switchgear operation.

17.4

Function test / Test operation

DANGER!
Putting defective switchgear into operation can endanger the life of people and damage the
switchgear.
Never put switchgear into operation if you notice during test operation that a part of it

does not work as described in here.
Perform test operations with auxiliary voltage only!

DANGER!
Risk of injury by sudden rotation of hand crank. If you use a hand crank without a freewheel
to charge the spring, the hand crank will rotate when the control voltage is switched on again
(motor starts up) and can lead to injury.
Use special hand crank with freewheel from the accessories!

Switch the three-position switch and the circuit-breaker several times to CLOSED and OPEN

position. Observe the correct indication of the associated switch position indicators.
Check mechanical interlocks and covers to verify easy operation.

After the mechanical function test, the freewheel of the OPEN and CLOSE pushbuttons of the
circuit-breaker can be readjusted. The factory-set freewheel is approx. 5 - 7 mm.
Measure the freewheel of the two pushbuttons (e.g. by means of a tape measure or vernier

caliper).
Remove the front plate of the circuit-breaker panel.

Revision 05 • INSTALLATION AND OPERATING INSTRUCTIONS • NXPLUS C Wind • 802-9074.9
Freewheel
(approx. 7 – 5 mm)