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This
laboratory is equipped with ultimate measurement techniques
which allow extensive testing of power transformers, instrument
transformers and HV switching equipment, including type
and special tests in accordance with international standards.
Since 1995, the
Laboratory has been accredited by Romanian Accreditation
Association- RENAR
(member of ILAC and EA ) according to IEC/ISO
17025.
Since
2007,
the Laboratory has been accredited by DATech Deutsche
Akkreditierungsstelle Technik in der TGA GmbH (member
of ILAC,IAF and EA ) according to IEC/ISO
17025:2005. |
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Annex
to the accreditation certificate |
TESTING
Equipments
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Impulse
generator 4,2 MV; 336 kWs
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IMPULSE
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lightning
4200 kV(336kWs)
700 kV (4,9kWs)
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switching
2600 kV
300 kV
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AC
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25
Hz to 150 Hz
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1200
kV (hall)
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1,2
A
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1800
kV (outdoor)
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1,2
A
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50
Hz
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200
kV
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0,5
A
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350
kV
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0,75
A
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3x250
kV
(resonant system)
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1
A
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(25
to 150) Hz - three phases
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15
kV; 35 kV;110 kV
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5
MVA
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2
min
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HV
Testing Lab consists of:
-
a screened high-voltage hall (48 m x 32 m x 27 m) for type and
special tests (with 4.2 MV impulse generator, 1.2 MV AC transformer
cascade and 1.1 MV DC cascade rectifier, artificial rain equipment);
- a induced voltage hall (36 m x 32 m x 27 m) for routine tests;
- an outdoor test field (30 m x 35 m) for reliability test.
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MEASURING
TECHNIQUE
- High Voltage
measuring systems formed of dividers and peak voltmeters
- Lightning
and switching impulse divider
643/4200 [pF]/[kV] (mounted together with the
generator) according. to IEC 60060-2/94, Amendment 1/96
Response time - 10 ns
- Lightning
impulse divider
10/2200 [kohm ]/[kV]
Response time - 27 ns
- Lightning
impulse divider 10/770 [kohm ]/[kV].
Response time - 10 ns
- AC capacitive
divider 160/1200 [pF]/[kV]
(mounted together with AC cascade)
- AC capacitive
divider 200/1800 [pF]/[kV] (mounted together with the upper cascade
unit in outdoor Field)
- Reference
measuring systems according to IEC 60060-2 for LI ( SI ), AC ,
DC voltages and Impulse
Charge for PD measurements, having trasability to PTB
- Equipments
specialized to record HV transient phenomena
(Transient
recorder 10 bit, 100
MS/s,
3 channels and Transient recorder 10 bit, 100
MS/s, 2channels)
- Equipments
specialized to measure partial discharges
by electrical and ultrasonic methods, with
PD free sources up to 600 kV
- Equipment
to measure radio interference voltage
- Equipment
to measure atmospheric conditions during
HV test
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)
