Siemens M200D 사용자 설명서
Functions
3.7 System monitoring
M200D AS-Interface Basic
Manual, 03/2009, A5E01668085-01
Manual, 03/2009, A5E01668085-01
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3.7
System monitoring
3.7.1
Current limit values
Description
The motor current and current limit values can be used to determine different system
statuses:
System status
Current value
Protection by
Motor blocked
Very high current flowing
Blocking protection
Motor runs at no load (e.g.
because system is damaged)
Very low current flowing
(< 18.75 % of I
e
)
Residual current detection
Response to residual current detection
Residual current detection responds when the motor current in all three phases falls below
18.75 % of the set rated operating current. In this case, the motor starter shuts down the
motor.
Residual current detection is deactivated by setting the rotary coding switch to
Residual current detection is deactivated by setting the rotary coding switch to
"CLASS OFF".
Note
When the motor is switched on, residual current detection is suppressed for around 1
When the motor is switched on, residual current detection is suppressed for around 1
second.
Blocking current monitoring
The blocking current specifies how much current is consumed by the motor (at rated voltage)
when the axis blocked.
The blocking current monitoring function detects when a motor axis is blocked mechanically.
The blocking current monitoring function detects when a motor axis is blocked mechanically.
The block causes the motor to consume more power. The "blocking current" is a defined
monitoring threshold for the motor current consumption.
It is monitored as follows:
It is monitored as follows:
When the motor starts, the tripping limit for the blocking current is set permanently to 800 %
of the rated operating current for a period of 10 s. During operation, the "blocking current"
tripping limit is set permanently to 400 % of the rated operating current.
If the blocking current is exceeded, the motor starter detects blocking. Blocking time
If the blocking current is exceeded, the motor starter detects blocking. Blocking time
monitoring is activated as of the point at which the blocking current is exceeded. If the
blocking current flows for longer than the blocking time, the motor starter automatically
generates a shutdown command.