Additional Functionality; Optional Functionality - Siemens 7SR210 Argus Quick Start Manual

Additional Functionality

27/59 Under/Over Voltage
Each element has settings for pickup level, drop-off level and
Definite Time Lag (DTL) delays. Operates if voltage 'exceeds'
setting for duration of delay. Can be applied in load shed-
ding schemes.
47 Negative Phase Sequence Overvoltage
Each element has settings for pickup level and Definite Time
Lag (DTL) delays. Operates if NPS Voltage exceeds setting for
duration of delay.
51V Voltage Controlled OverCurrent
Element has settings for UnderVoltage pickup level and
operates if voltage falls below setting. On Pick-up this
element applies the set 51v Multiplier to the pickup setting
of the 67/51 phase fault elements.
59N Neutral Overvoltage
Two elements, one DTL and one IDMTL, have user settings
for pickup level and delays. These will operate if the Neutral
voltage exceeds the setting for duration of delay. Neutral
overvoltage can be used to detect earth faults in high im-
pedance earthed or isolated systems.
60CTS CT Supervision
The CT Supervision considers the presence of negative phase
sequence current, without an equivalent level of negative
phase sequence voltage, for a user set time as a CT failure.
Element has user operate and delay settings.
60VTS VT Supervision
The VT Supervision uses a combination of negative phase
sequence voltage and negative phase sequence current to
detect a VT fuse failure. This condition may be alarmed or
used to inhibit voltage dependent functions. Element has
user operate and delay settings.
67/67N Directional Control
Phase fault, Earth fault and Sensitive Earth fault elements
can be directionalised. Each element can be user set to For-
ward, Reverse, or Non-directional. Directional Phase fault
elements are polarised from quadrature voltage. Earth fault
elements can be user set to be polarised from residual volt-
age or negative phase sequence voltage.
81 Under/Overfrequency
Each element has settings for pickup level, drop-off level and
Definite Time Lag (DTL) delays. Operates if frequency ex-
ceeds setting for duration of delay. Typically applied in load
shedding schemes.
81 Under/Overfrequency
The relay provides a single-end type fault locator which is
able to estimate the fault position using analogue
information measured by the relay at one end of the
protected circuit during the short duration of the fault.
Siemens Protection Devices Limited

Optional Functionality

79 Auto-Reclose
This function provides independent Phase fault and Earth
Fault/Sensitive Earth fault sequences of up to 5 Trips i.e. 4
Reclose attempts before Lockout. Auto-Reclose sequence can
be user set to be initiated from internal protection operation
or via Binary Input from an external Protection. The user can
set each trip in the sequence to be either instantaneous
(Fast) or delayed. Independent times can be set by the user
for Reclose (Dead) time and Reclaim time.
25 Check Sync
The check synchronizing function is used to check that the
voltage conditions, measured by the voltage transformers on
either side of the open circuit breaker, indicate that it is safe
to close without risk of damage to the circuit breaker or
disturbance to the system.
Data Acquisition -
Via Communication Interface
Sequence of event records
Up to 5000 events are stored and time tagged to 1 ms
resolution.
Fault Records
The last 10 fault records are displayed on the relay fascia and
are also available through the communication interface,
with time and date of trip, measured quantities and type of
fault.
Waveform recorder
The waveform recorder stores analogue data for all poles
and the states of protection functions, binary inputs, LEDs
and binary outputs with user settable pre & post trigger
data. The last ten waveform records are stored for easy
selection. Their duration is user selectable from 1 second, 2
seconds, 5 seconds or 10 seconds.
Demand Monitoring
A rolling record of demand over the last 24 h is stored. The
demand is averaged over a user selectable period of time. A
rolling record of such demand averages is stored and
provides the demand history. A typical application is to
record 15 min averages for the last 7 days.
Real Time Clock
The time and date can be set and are maintained while the
relay is de-energised by a back up storage capacitor. The
time can be synchronized from a binary input pulse or the
data communication channel.
Data Log
The average values of voltages, current and real & reactive
power are recorded at a user selectable interval and stored
to provide data in the form of a Data Log which can be
downloaded for further analysis. A typical application is to
record 15 minute intervals over the last 7 days.
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