HVTest HT-802, Руководство пользователя

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2. Microprocessor-based protection device
Types of relay protection Test item Test module Note
Lin
e
pro
te
cti
on
Multi-stage over-current
Relative test item
AC Test
Frequency Test
Power direction
Can do most of the relay and
micro computer test at “AC test”
module.
Over (less ) voltage
Sequence
components
voltage and current
Frequency devices
Power
directional
protection
Reclosing and
conversion failure
Relative test item
Group test
State series Required synchronous and no
voltage test, Ux as shunt side
voltage output
Distance and zero
sequence
Distance and
zero sequence
set value
calibration
Stepped
impedance
Zero-sequence
protection
“Stepped impedance” and “zero
sequence
protection” can
one-time automatic test
multi-stage , various fault
types , distance and zero
sequence
value of various
phase
Impedance
characteristics
Impedance
phase
characteristics
Power frequency variation
distance Set value
calibration
Power
frequency
variation
distance
The fault current should be set
enough, for example 10~15A.
Composite voltage
Locking (direction)current
Over-current, low
voltage, negative
sequence
voltage,latching
over-current.
AC test
Some of the “low voltage” and
“negative sequence voltage”
injected by different terminal,
you should change it during the
test.
Low cycle, low voltage load
shedding device
Relative test item
Synchronous low
cycle
Frequency Test
AC Test
If other conditions meet the
requirements, the device did
not operate, check if the device
need input current and switch
contacts.
G
en
era
to
rtr
an
sfo
rm
er
pro
te
cti
on
Differential protection
Proportional
braking
characteristics
Differential relay
Differential
protection
AC test Generator differential
protection, “differential
protection” when tested, it can
be regarded as the wiring Y / Y,
high and low voltage side
balance coefficients (=1) are a
transformer protection.
The " differential test " focus on
Harmonic brake
characteristics
Differential test
Differential
protection