Monitoring - Siemens SWT 3000 Equipment Manual

2.6

Monitoring

Overview
The monitoring functions of the device are as follows:
•
Operating voltage
All outgoing information (TX and command outputs) are blocked as long as the operating voltages of the
equipment are not within the specified ranges.
•
Switching command duration
If a switching command with a duration of > 500 ms is received, the command outputs are disabled and
an alarm is triggered. The switching command duration can be configured.
•
Guard tone failure alarm
If there is no valid command frequency present, a guard tone failure alarm is triggered after about 10 ms.
•
Signal to Noise (S/N) ratio
If the configured threshold of the S/N ratio is exceeded, a signal to noise alarm can be triggered. During
alternate multi-purpose operation the S/N supervision is not performed.
•
Transmit level monitoring
The level of the transmit amplifier is monitored.
•
Operating state
The operating state of the device is displayed on the front panel with differently colored LED.
•
Control contacts for external equipment
A floating make contact or break contact (alarm contact) is available at the device terminals for signaling
the following alarms:
– Non-urgent alarm (NU-alarm, NUALR, or NDALR)
– Receiver alarm (RXALR or EALR)
– General alarm (GALR or GENALR)
•
Signaling modules IFC-S can be provided additionally as an option. With the aid of this module, any oper-
ation of the local circuit can be signaled externally via an auxiliary contact.
NOTE
i
i
Maximum 2 IFC-S modules are possible.
•
Measuring options
Decoupled measuring points at which the operating values can be monitored are arranged on the
modules for start-up and maintenance of the unit.
•
Input pulse suppression
In order to be accepted as an input signal, commands must be applied at the input for at least 1 ms. You
can increase this minimum time to 100 ms in steps of 1 ms. The input pulse suppression can be config-
ured.
•
Minimum transmission duration
Each command is transmitted for at least 15 ms. The minimum transmission time can be configured.
Smart Communication, SWT 3000 Teleprotection, Equipment Manual
C53000-G6040-C605-1, Edition 03.2020
Functional Description
2.6 Monitoring
49