External Supply Of The Auxiliary Supply From A Secure Line - Siemens SINAMICS G150 Operating Instructions Manual

Electrical installation

4.9 External Supply of the Auxiliary Supply from a Secure Line

4.9 External Supply of the Auxiliary Supply from a Secure Line
Description
An external auxiliary supply is always recommended if communication and closed-loop
control are to be independent of the supply system. An external auxiliary supply is
particularly recommended for low-power lines susceptible to short-time voltage dips or power
failures.
With an external supply independent of the main supply, warnings and fault messages may
still be displayed on the operator panel and internal protection and monitoring devices if the
main supply fails.
When the external auxiliary supply is connected, dangerous voltages are present in the
cabinet unit even when the main circuit-breaker is open.
NOTICE
An external auxiliary supply (infeed) must always be used if the automatic restart (WEA)
function is to be used with integrated EMERGENCY OFF option (L57) or EMERGENCY
STOP option (L59, L60).
Otherwise, the automatic restart function does not work.
Table 4- 12 Connection options for the external auxiliary voltage depending on the selected options.
Cabinet unit option
- With no further
options
- Version C
L13
L26 (when I > 800 A)
L83
L84
L86
L87
This is required not only when the open and closed-loop control but also when the 230 V AC load (thermistor motor
1)
protection, PT100 evaluation, or insulation monitor) is to remain in operation if the main supply fails.
92
DANGER
External supply of auxiliary voltage independent of the main supply
24 V DC 230 V AC
Terminal –X9 Terminal –X40
X
230 V AC
(terminal –X40)
X
X
X
X
X
X
230 V AC (terminal –X40) with
options L13 / L26 (when I > 800
1)
A)
X
X
X
X
Converter cabinet units
Operating Instructions, 03/2012, A5E03263466A