Control Connection; Overtemperature Switch Connection For 3Rw34 86 - Siemens SIKOSTART 3RW34 Betriebsanleitung

5.5

Control Connection

1.
2. Connect control circuit pilot devices in accordance with the application. Section 6 provides examples of several
3. The specified rated values and starting load capacities of the 3RW34 can only be achieved by cooling with the
5.6

Overtemperature Switch Connection for 3RW34 86

The SIKOSTART 3RW34 86 soft starter requires an overtemperature switch. A description of mounting and wiring
the switch:
Mounting The Overtemperature Switch
The Overtemperature Switch and Bracket are mounted at the top end of the SIKOSTART Control without any cooling
fans. This is the main line and utility power end of the control (L1 to L3). The bracket is mounted under one of the
center housing mounting bolts.
Wiring The Overtemperature Switch
L1/L+
N/L-
Fig. 9 : Typical Overtemperature Switch Wiring
The overtemperature switch has a normally closed contact that opens when an overtemperature condition exists.
The contact has two 2¼" (6,3 mm) quick-connect terminals for connection to the control circuit. The contact is wired
in series with the start/stop control circuit. The switch contact is rated for 230 V AC at 8 A resistive maximum.
3ZX1012-0RW34-1AN1
The control supply voltage U and the supply voltage for the control inputs and outputs must be connected in
s
accordance with the specifications on the rating plate of the soft starter (see Fig. 2 and Fig. 3).
typical arrangements; Section 7 describes the DIP switch (SW-1) settings.
built-in fans. After the soft starter has been switched off by canceling the ON command at terminals A1 and A2,
the built-in fans must run on for approx. 60 minutes to ensure that the power electronics are sufficiently cooled.
For this reason, it is extremely important that the supply voltage at terminals X1 and X2 is not switched off until
approx. 60 minutes (at the earliest) after the ON command has been canceled.
If the supply voltage at terminals X1 and X2 is switched off (which also results in the fans being switched off) at
the same time the ON command is canceled at terminals A1 and A2, the soft starter can only be switched on
again, at the earliest, approx. 3 hours later in order to achieve the specified rated values and starting load
capacities of the 3RW34.
F1
13 37
Start
G1 G1
S1
14 38
Stop
Run Fault
S2
X1
G1
Overtemperature
X2
A1
U_Motor
=100%
Motor
G1
Run
A2
Bypass
Hazardous voltage.
Will cause death or serious injury.
To avoid electrical shock or burn, do not touch soft
starter output terminals when voltage is applied to the
soft starter.
Output terminals will have voltage present even when
the soft starter is OFF.
27
G1
28
K1
DANGER
Installation
11