The diagram shows the method of attaching the grounding spider. Secure the clamps for the
grounding spider to the ball heads ② and ③ in the cabinet.
① Schematic diagram of ball head
② Ball head
③ Ball head
Figure 9-1 Schematic diagram for attaching the grounding spider
9.3 Opening the device
The drive is equipped with a door interlocking system. Depending on the design, this is an
electromechanical door interlocking system or optionally a safety locking system.
The power unit doors can only be opened under the following conditions:
● The DC link current is zero.
● The firing pulses are disabled.
● Voltages at the input and output sides are below a minimum value.
● The circuit breakers are open.
Maintenance
9.3 Opening the device
SINAMICS GL150 6SL38503UM114PA0Z
106 Operating Instructions Rev.201910301420 MUSTER
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