Siemens 7SG12 DAD-N, Manual

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7SG12 DAD N Performance Specification
Status Input Performance
Minimum DC current for operation 48V 10mA
110V 2.25mA
220V 2.16mA
Reset/Operate Voltage Ratio
≥
90%
Typical response time < 5ms
Typical response time when programmed to energise an
output relay contact
< 15ms
Minimum pulse duration 40ms
To meet the requirements of ESI 48-4 then 48V status inputs should be ordered together with external dropper
resistors as follows:-
Status Input External Dropper Resistances
Nominal Voltage Resistor Value (Wattage)
110 / 125V 2k7 ± 5% ; (2.5W)
220 / 250V 8k2 ± 5% ; (6.0W)
Each status input has an associated timer that can be programmed to give time-delayed pick-up. The pick-up
timers can be set to 20ms to provide immunity to an AC input signal. Status inputs will then not respond to the
following:
•
250V RMS 50/60Hz applied for two seconds through a 0.1
μ
F capacitor.
•
500V RMS 50/60Hz applied between each terminal and earth.
•
Discharge of a 10
μ
F capacitor charged to maximum DC auxiliary supply voltage.
4.6 Indication
There are two types of LED indication, General and Protection Healthy.
Case Size Number of LEDs
E8 16 G Protection Healthy
E12/E16 32 G Protection Healthy
All General LED indication is fully configurable by the user. All General indications are stored in non-volatile
memory without the use of an internal backup battery.
4.7 Settings And Configuration
Settings changes may be done via the front panel user-friendly fascia keypad and LCD or via standard Reydisp
Evolution windows software either locally or remotely. Settings changes are stored in EEPROM memory.
Configuration changes may be achieved locally via the front serial port with a Windows based toolbox support
package. Configuration changes and software upgrades are stored in Flash EPROM memory.
4.8 Recording
Up to 5 fault records may be stored within the relay, Fault records are accessible via the front panel showing the
date and time of trips. New faults automatically overwrite the oldest fault record when they occur.
Waveform records are automatically stored whenever a trip is generated. Waveform recording can also be
triggered by the status inputs. New waveform records automatically overwrite the oldest waveform record when
they are triggered. The exact number and duration of waveform records, for any particular relay model, is
available from the Relay Settings section of this Manual in the Data Storage Menu listing.
Up to 500 time tagged event records are stored within the relay. New events automatically overwrite the oldest
event record when the 500 are used up.
4.9 Communications
IEC 60870-5-103 communications is standard on Reyrolle Modular II numerical product range. IEC 60870-5-103
has the advantage of built in time synchronisation of all devices, reduced communications overhead, high data
security and compatibility with all of the major substation automation and control systems.
COM1 is a dedicated rear fibre optic serial port. COM2 can be auto-switched between rear fibre optic serial port
and a front isolated RS232 serial port. IEC 60870-5-103 may be directed to use either COM1 or COM2.
All fibre optic ports can be star connected to a Sigma passive hub or simply daisy-chained in a loop-in loop-out
configuration with other Reyrolle relays e.g. Argus, Delta, Ohmega, Tau.
©2010 Siemens Protection Devices Limited Chapter 2 Page 6 of 7