9.4.4.3
Checking hoisting solenoids and security bolts
● Check the hoisting solenoids and security bolts at regular intervals.
● Replace defective hoisting solenoids and security bolts before (re)commissioning.
9.4.4.4
Checking the isolating clearances
● Slight, dry, non-conducting contamination is permitted.
● Remove contamination caused by dust in conjunction with high humidity.
9.4.4.5
Checking the capacitor release
Check the following settings:
● T950
Primary tapping: 400 V + 15%
Secondary side: jumpers 32 – 33
● K950
Measuring-circuit voltage at IN3 (no-load voltage of the C release unit: approx. 320 V)
Switch positions: UNDERLOAD, NO MEMORY (the switches are located at the side).
T1 = 0.1 s
Ue = 30% / release at 180 V
Hysteresis = 5% / enable at 210 V
● K951
Measuring-circuit voltage at IN2
Switch positions: UNDERLOAD, NO MEMORY (the switches are located at the side).
T1 = 0.1 s
Ue = 60% / release at 180 V
Hysteresis = 5% / enable at 202 V
The wiring to the circuit-breaker must be checked according to the circuit diagram.
9.4.4.6
Checking the cable and screw terminals
● Check the cable and screw terminals regularly to ensure that they are secure.
● Tighten the screws if necessary. When doing this, comply with the specified torques
● Check the cabling for defects.
● Replace any defective parts immediately.
9.4.4.7
Checking the plug connections.
Regularly check the plug connections to ensure they are seated correctly and the contacts are
not corroded.
Maintenance
9.4 Inspection and maintenance
SINAMICS SM150 6SL3810-7NN38-0AA1
Operating Instructions Rev.201910281406 EXAMPLE
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