SERVICES OFFERED

High voltage tests for HV equipment
(transformers, cables, switchgears, GIS, etc.)
inside the electromagnetic screened hall of ICMET

High voltage tests on site:

- Full wave (1.2 / 50 s ) and tail chopped wave voltage impulse tests (between 2 and 8 s) at voltages up to 4200 kV and energy 336 kWs
- Applied voltage tests at frequencies between 25 and 150 Hz up to 800 kV
- Single and three-phase induced voltage test, 5 MVA, 2 min.
- DC voltage tests uo to 1200 kV 30 mA, up to 1200 kV
- Oscillating switching impulse tests
- Aperiodic switching impulse tests up to 2600 kV
- External insulation test under artificial rain for equipment up to 400 kV rated voltage
- Partial discharge and radio interference measurements
- Combined voltage tests: LI - AC, SI - AC, DC - LI, DC - SI

- AC sparkover voltage test of arresters up to 60 kV
- AC or DC voltage test of high voltage cables up to 100 kV
- AC voltage test of SF6 enclosed stations up to 250 kV (resonant equipment)
- Induced voltage test of distribution transformers
- Switching impulse test for instrument and power transformers by electromagnetic induction
- Partial discharge measurement at instrument and power transformers by electric and ultrasonic method.

 

The accredited tests for High Voltage Testing Laboratory

Test Type

The main test and / or measuring equipment

Tested item

The reference documents (norms)

1. Lightning impulse test (LI)
1.1 Lightning impulse test (LI) 1,2 / 50 µs

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1. Capacitive divider for LI 4.2MV
2. Resitive divider for LI 2,2MV,
10 kOhm
3.Damped capacitive divider 2MV
4.Haefely impulse oscilloscope
type 72E, with photographic device, maximum input signal 1500V,
with 9 steps, sweep base time (0,1¸ 500)m s/cm
5. AEG impulse oscilloscope type 018, with the photographic device, maximum input signal 700V.
6. Haefely peak voltmeter type 64 m, class ± 1%
7. Peak voltmeter type MUT-7,
class ± 1%
8. Impulse peak voltmeter type SMUT-1
9.GIT 700kV max.4,96kWs
10.GIT 4,2MV max.336kWs
11.Sphere gap f 1500mm, vertical position
12. Sphere gap 750mm, vertical position
13. Sphere gap f 250mm, horizontal position
14. Resistive divider for LI, 0,77MV/101 Ohm
15 Digital impulse measuring system for LI type TR-AS 100-10/3.

 1.Oil-immersed power transformers up to 400MVA, 400kV class, inclusively

IEC 60-1/89 Sect.6
IEC 60-2/94, Sect.9

IEC 60076-3/2000
IEC 722/82

2.Dry power transformers up to 3000kVA, 36kV class, inclusively

IEC 60726/82

3.Current transformers up to 400kV class, inclusively

IEC 60185/1994
IEC 60044-1/96 9.1

4.Voltage transformers up to 400kV class, inclusively

IEC 60186+A1/96
IEC 60186/87 (capacitive)
IEC 60044-2/97 (inductive)

5. Alternating current disconnectors up to 400kV class, inclusively

EN 60129+A1/96
IEC 62271-100/2001
IEC 60071-1/96
IEC 60694/96

6. Alternating current circuit breakers up to 400kV class, inclusively

IEC 60071-1/96
IEC 60694/96
IEC 62271-102/2001

7.Enclosed busbars

IEC 60071-1/93
IEC 60071-2/96

8. Bushing

EN 60137/98
IEC 60137/95

9. AC metal-enclosed switchgear and controlgear for rated voltages, above 1kV and up to 72.5kV, inclusively(High-Voltage prefabricated substation).

IEC 60298/1999

10. Arrester

IEC 60099-1/94
IEC 60099-1/91

11.   a- Reactors

IEC 60289/88

b- Capacitors

IEC 60358/96
IEC 60358/90

c- Neutral resistances

SR 6669-2/86

12. High voltage fuses: current limiting fuses

IEC 60282/1-2002

1.2. Lightning impulse test with measurement of transferred over-voltage from the high-voltage winding to a low voltage winding.

GIT 4,2MV max:336 kWs or
low-voltage GIR
Capacitive divider 4,2MV
Resistive divider 770kV/ 10kOhm
Impulse cathodic oscilloscope or digital impulse measuring system type TR-AS 100-10/3.

1. Oil - immersed or dry power transformers up to 400MVA; 400kV class, inclusively.

IEC 60076-3/2000

2. Power - frequency voltage tests.
2.1. Separate - source voltage test (50Hz)

1.DC 1,2MV type WMC+WMUT-3
2.DC 600kV type MCF + WMUT-3
3.DC 350kV type MCF + MU9
4.DC 300kV type MCF+WMUT-3
5.Transformers cascade 1,5MVA; 1200kV
6.Test transformer 350kVA;350kV
7.Test transformer 200kVA; 200kV
8.HV source 1,5kVA; 10/0,22kV
9.Motor-generator group Smax=5MVA; Umax-12kV; f=(25¸ 150)Hz
10.Artificial rain plant
11.Check device of the second figure specific to protection degree
(3; 4 and 5).




1.Oil-immersed and dry power transformers up to 400MVA, 400kV class, inclusively

IEC 60-1/89, Sect.5
IEC 60-2/94, Sect.8

IEC 60076-3/2000
IEC 60726/82

2.Voltage transformers up to 400kV class, inclusively

IEC 60186+A1/96
IEC 60186/87 (capacitive)
IEC 60044-2/97 (inductive)

3. Current transformers up to 400kV class, inclusively

IEC 60185/1994
IEC 60044-1/96

4. Alternating current disconnectors up to 400kV class, inclusively, dry and wet conditions

EN 60129+A1/96
IEC 62271-100/2001
IEC 60071-1/96
IEC 60694/96

5. Alternating current circuit-brekers up to 400kV class, inclusively, dry and wet conditions

IEC 60071-1/96
IEC 60694/96
IEC 62271-102/2001

6. Enclosed busbars

IEC 71-1/93
IEC 71-2/96

7. Bushing, dry and wet conditions

EN 0137/98
IEC 60137/95

8. AC metal-enclosed switchgear and controlgear for rated voltage above 1kV and up to 72.5kV, inclusively (High-voltage prefabricate substation), dry and wet conditions.

IEC 60298/99

9. Arresters

IEC 60099-1/94

10.  a-Reactors

IEC 60289/88

b-Capacitors

IEC 60358/96

c-Neutral resistances

EN 60529/95

2.2. Induced over-voltage test (150Hz)

1.Motor-generator group Smax=5MVA; Umax=12kV; f=(25¸ 150)Hz
2.Induced voltage power station 15/35/110kV with following composition
a) 3MVA; 22,5(45)± 13x1,445%/6(12)kV power transformer
b) 500kVA; 6(12)/125(250)kV power transformer
c) 1000kVA; 7,5 ± 30%/1,5 (3)kV power transformer
d) TIRBO 20kV/0,1kV; TEMU 35kV/0,1kV; TEMU 110kV/0,1kV instrument transformers
3.DC 300kV type MCF+WMUT-3
4.DC 600kV type MCF+WMUT-3
5.700kV damped capacitive divider

1. Oil-immersed and dry power transformers up to 400MVA, 400kV class, inclusively

IEC 60076-3/2000
IEC 60726/82

2.3.Measurement of the harmonics of the no-load current

Motor-generator group S=5MVA; 6(12)kV; f=50Hz
Induced voltage power station 110/35/15kV
Wave analyzer Hewlett Packard
type 3581.A
Power Harmonics Analyzer
type Fluke-41

Oil-immersed and dry power transformers up to 400MVA; 400kV class, inclusively

IEC 61000-4-7/91

3. Switching impulse test (SI) 250/2500 µs




1.Capacitive divider 4.2MV
2.Universal RC divider 2MV
3.Resistive divider for LI 2.2MV, 10kOhm
4.Impulse oscilloscope Haefely tip 72E with photographic device, max input signal 1500V, with 9 steps, sweep base time (0,1¸ 500)m s /cm
5.Impulse oscilloscope AEG type 018, with photographic device, input signal max.700V
6. Haefely Peak voltmeter type 64m, clasa ± 1%
7. Peak voltmeter type WUT-7, clasa ± 1%
8.Peak voltmeter type SMUT-1
9.GIT 700kV max., 4,96kWs
10.GIT 4,2MV max., 336kWs
11.Digital impulse measuring system for SI type TR-AS 100-10/3
12. Sphere gap F 1500mm ,vertical position
13. Sphere gap F 750mm, vertical position
14.Sphere gap F 250mm, horizontal position




1.Power transformers up to 400 MVA, 400kV class, inclusively

IEC 60-1/89
IEC 60-2/94

IEC 60076-3/2000
IEC 60722/82

2.Instrument transformers up to 400kV class, inclusively
a-Current transformers


b-Voltage transformers




IEC 60185/94
IEC 60044-1/96
IEC 60186+A1/96
IEC 60186/87 (capacitive)
IEC 60044-2/97 (inductive)

3.Circuit-brekers up to 400kV class, inclusively

IEC 62271-102/2001

4.Current disconnectors up to 400kV class, inclusively

EN 60129+A1/96
IEC 62271-100/2001

4. Measurementr of capacity and tan delta

1.High voltage Schering bridge type SIEMENS
2.Standard capacitor 100pF; 100kV and 200kV
3. AC voltage sources from cr.no.2
4. Screens, flexible metalic tubs

1.Power transformers up to 400MVA, 400kV class, inclusively

SR 6669-1;3/86
SR 1703-7/80

2. Bushings up to 400kV class, inclusively

IEC 60137/95
EN 60137/98

3. Capacitors

IEC 60358/90

4.Instrument transformers

IEC 60185/94
IEC 60044-1/96
IEC 60186-1+A1/96
IEC 60186/87 (capacitive)
IEC 60044-2/97 (inductive)

5. Measurement of partial discharge level

1.Voltage sources from cr.no.2 or 3
2.Coupling capacitor Micafil 600kV
3.Partial discharge measuring instruments LMZ, AEG, MTE
4.Calibrating generator: RFT; PET-2
5.Frequency analyzer
6. Tektronix oscilloscope
type 2212, 60MHz
7.Ultrasonic detectors type DUDP


1.Power transformers up to 400MVA, 400kV class, inclusively

IEC 60-1,2/89;94
IEC 60076-3/2000
IEC 60270/2000

2. Instrument transformers up to 400kV, inclusively
a) Current transformers
b) Voltage transformers

IEC 60044-1/96
IEC 185/94
IEC 60270/2000
IEC 60044-2/97
IEC 60186/87
IEC 60186+A1/96

3. Bushings

IEC 60270/2000
IEC 60137/95
EN 60137/98

6. Measurement of RIV by conduction and radiation way

1.Voltage sources from crt.no.2 or 3
2.Coupling capacitor Micafil, 600kV
3.Measuring instruments of RIV; LMZ
4.Calibration generator: RFT
5.Frequency analyzer


1.Power transformers up to 400MVA, 400kV class, inclusively

IEC 60-1,2/89/94
NEMA TR 1/1974

2.High voltage equipment

IEC 60437/97
IEC 60694/96
IEC 62271-100/2001
IEC 62271-102/2001
CISPR 18-2/86
EN 60129+A1/96
EN 61284/2000

7. Direct current high voltage test up to Umax=1200kV

1.Cascade rectifier, Greinacher mounting circuit with Umax=1200kV; Imax=30mA
2.Resistive divider 1.2MV included in testing equipment

-Electric cables;
-Capacitors;
-Circuit-breakers;
-SF6 enclosed equipment;
-Protective rods;
-Insulating stairs.

IEC 60-1/89
IEC 60-2/94

8.Emission tests for EMC
8.1 Radio disturbance measurement by conduction at low voltage equipment

 1.Artificial network SMZ 5; SMZ 6;
75 Ohm
2.Radio disturbance measuring instrument type SMV 6.1
-0.15-50 MHz;
-input impedance 50 Ohm; 75 Ohm
-artificial network NNB 103,
50 Ohm/50µH
3.TDS-524 oscilloscope
4.Radio disturbance measuring instrument type SMV 42/98
5.Artificial network 41/98

-Industrial equipment, scientific, medical and electric light equipment
-Equipment, systems used in power electronics
-Information technology equipment
-Household appliances electric tools

 CISPR 16-1/1999
CISPR 16-2/1999+A1/99
SR EN 55011/1997
CISPR 14-1/2000
SR EN 55015/1995
CISPR 22/1997+A1/2000
8.2 Measurement of disturbance power by conduction for low voltage equipment 1.Interference electromagnetic
receiver SMV 42
2.Absorbing clamp		 -Electric motor operated and thermal appliances for household and similar purposes;
-Electric tools;
-Motor-operated electro-medical apparatus;
-Electric toys running on tracks;
-Automatic goods dispensing machines and automatic entertaining machines
 CISPR 14-1/2000
SE CISPR 16-1:1999
CISPR 16-2/1999+A1/99
8.3 Harmonic current emissions measurements for low voltage equipment 1.Harmonics analyzer and flicker
type HAR 1000-1P
2.IBM PC Computer		 -Electrical and electronically equipment, including unprofessional arc welding equipment, with an input current less then
16A/ phases which are intended to be connected in low-voltage supply systems.		 SR EN 61000-3-2:2001
CEI 61000-4-7:2002
8.4 Voltage fluctuations and flicker measurement for low voltage equipment 1.Harmonics analyzer and flicker
type HAR 1000-1P
2.IBM PC Computer		 -Electrical and electronically equipment, intended to be use in 220 and 250 V, 50 Hz low voltage supply systems with ratted current less then 16 A/phase and up/subjected at special connection SR EN 61000-3-3:1998
CEI 61000-3-3:1994 +A1/2001

9.Direct current high voltage test up to Umax=1200kV

1.Cascade rectifier, Greinacher mounting circuit with Umax=1200kV;
I max=30mA

2.Resistive divider 1.2 MV included in testing equipment

-Electric cables;
-Capacitors;
-Circuit-breakers;
-SF6 enclosed equipment;
-Protective rods;
-Insulating stairs

STAS 6669/1;2;3-86
IEC 60-1/89
IEC 60-2/94

 

10.Combined voltage test
(LI or SI; AC; DC)		 1.Impulse generator 4.2 MV + its own capacitive divider
2.Transformer cascade + its own capacitive divider
3.Cascade rectifier 1.2 MV + its own resistive divider
4.Separating capacitor Un=220kV mounted over an insulated platform for insulating level U=400kV
5.Insulated limiting resistance 17 kOhm
6.Sphere gaps, diameter 250mm, 500mm and 1500mm
7.Damped capacitive divider RC 1.5MV
8.Capacitive divider 350kV
9.Digital measuring system for LI, SI type TR-AS 100-10/3		 -Electric equipment STAS 6669/1;2;3-86
IEC 60-1/89
IEC 60-2/94
IEC 60694/96
SR EN 60694+A1+A2/96

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