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Laboratory of Electricity

There are15 staffs working at laboratory of electricity, including Master (M.Sc), engineers and technicians.
- Head of lab: M.Sc Pham Hong Minh (email: minhph@vmi.gov.vn)
- Deputy head of lab: M.Sc Le Tiep (email: letiep@vmi.gov.vn)      |     M.Sc Nguyen Anh Son (email: sonna@vmi.gov.vn)
- Lab. Address: Room 310 – Buiding D, No 8 Hoang Quoc Viet road, Cau Giay Dist, Hanoi
- Tel: 04. 3836 1134   |   Fax: 04. 3756 4260
- Email: dien@vmi.gov.vn

Verification capabilities of measuring equipment

Name of measuring equipment Range of measurement Accuracy
Voltage tranformer Uprimary up to 500 kV;
Usecondary: (100; 100/√3; 100/3; 110; 110/√3; 110/3) V
up to 0,1
Current transformer Iprimary up to 20 kA
Isecondary: 1A; 5A
up to 0,1
AC induction watt-hour meter 1 phase, 3 phase U: (30 ÷ 480) V/phase;
I: (0,01 ÷ 200) A/phase;
up to 0,5
AC static watt-hour meter 1 phase, 3 phase U: (30 ÷ 480) V/phase;
I: (0,01 ÷ 200) A/phase;
up to 0,2
Earth resistance tester 0,01 kΩ ÷ 500 TΩ up to 1
Insulation resistance tester 10-1 Ω ÷ 104 Ω up to 1

Calibration capabilities of measuring standards

Name of measuring standards Range of measurement Accuracy
Equipment for verifying Watt - hour meter 1 phase, 3 phase U: (10 ÷ 600) V/phase;
I: (0,001 ÷ 200) A/phase;
up to 0,002
Reference Watt-hour meter 1 phase, 3 phase U: (10 ÷ 700) V/phase;
I: (0,001 ÷ 200) A/phase;
up to 0,005
Voltage transformer standards Uprimary up to 500 kV;
Usecondary: (100; 100/√3; 100/3; 110; 110/√3; 110/3; 120; 120/√3; 120/3; 220; 220/√3) V
up to 0,002
Current transformer standards Iprimary up to 20 kA
Isecondary: 1A; 5A
up to 0,002
Standard Resistance box 0,001 Ω ÷ 1 MΩ
1 kΩ ÷ 10 TΩ
up to 0,001

Calibration capabilities of measuring standard/equipment

No

Measurand quantities /calibrated equipment

Range of measurement The best of measurement capabilities
/the smallest uncertainty of measurement
Note
1 DC volatge standard 10 V
1,018 V
1,0 ppm
1,5 ppm
DC standard /set of DC standard
2 DC Volatge 0,22 V ÷ 1100 V 
1 kV ÷ 180 kV
2,8 ppm
0.1 %
Calibrator /Meter
3 DC current 0,22 mA ÷ 10A 
10A ÷ 120A
10 ppm
50 ppm
Calibrator /Meter
4 AC voltage 0,2V ÷ 1000V
 (40 Hz ÷ 1MHz)
0.1 kV ÷ 35 kV; (50 Hz) 
35 kV ÷ 220 kV; (50 Hz)
25 ppm ÷ 80 ppm
200 ppm
200 ppm
Calibrator /Meter
5 Standard Resistor 1 mΩ ÷ 1 Ω
1 Ω ÷ 104 Ω
105 Ω ÷ 109 Ω
1 μΩ ÷ 100 TΩ
1,5 ÷ 15 ppm
1,0 ppm
5 ÷ 50 ppm
0.01%
Resistance standard /Resistance box /Resistance meter
6 Standard Inductor 0,1 μH ÷ 1 mH
1 mH ÷ 1 H
1H ÷ 1000 H
15 ÷ 50 ppm
10 ÷ 30 ppm
20 ÷ 100 ppm
Inductance standard /Inductance box /Inductance meter
7 Standard capacitor 1 pF ÷ 1 nF
1 nF ÷ 10 μF
10 μF ÷ 10 mF
15 ÷ 50 ppm
10 ÷ 30 ppm
20 ÷ 100 ppm
Capacitance standard /Capacitance box /Capacitance meter
8 DC Electrical Power – Energy (33 mV ÷ 1000 V)
(0,33 mA ÷ 20 A)
230 ppm Calibrator /Meter
9 AC Electrical Power – Energy standard 5 A ÷ 240 V 
45 Hz ÷ 65 Hz
50/PF ppm Calibrator /Meter
10 AC Electrical Power – Energy (30V ÷ 480V)/ phase
(0.01A ÷ 120A)/ phase
45 Hz ÷ 65 Hz
100/PF ppm Calibrator /Meter
11 Phase /Angle 0 ÷ 3600
45 Hz ÷ 65 Hz
0.010

 

12 Dissipation factor 0.0001-10.0000
(20 Hz ÷ 10 kHz)
10 pF ÷ 10 μF
0.05%

 

13 Ratio meter

 

 

 

14 High voltage impulse (±10) V ÷ (± 500) kV;
12.5 kJ;
1.2/50 μs
  Standard impulse Generator /Probe
15 PT/CT comparator test set 0.01% ÷ 200 % 
0.001' ÷ 10'
  Including of Burden box
16 AC/DC Withstanding volatge tester 1 kV ÷ 150 kV 0.05 % AC and DC
17 Partial discharge testing/measuring instruments     Including of standard capacitor
18 Other electrical Specialization equipement     Used in Factory

Testing capabilities

No Name of testing capabilities Specification Testing
1 Volatge transformer (1-220/√3) kV/ (100; 100/√3 ; 110; 110/√3 ; 220; 220/√3) V
50Hz

2 Current Transformer (0,1 ÷ 10000) A/ (5;1) A 
50 Hz

3 AC induction watt-hour meter 1 phase và 3 phase (30V ÷ 480V)/ phase
(0,01A ÷ 120A)/ phase
PF: ± 0,1 ÷ 1,0
45 Hz ÷ 65 Hz

4 AC static watt-hour meter 1 phase & 3 phase (30V ÷ 480V)/ phase
(0,01A ÷ 120A)/ phase
PF: ± 0,1 ÷ 1,0
45 Hz ÷ 65 Hz

5 Electrical safety equipment Used in low, medium, high voltage grid up to 200 kV; 50 Hz

6 Protection equipment Used in low, medium, high voltage grid up to 200 kV; 50 Hz

7 Power transformer Capability up to 250 MVA, Rating volatge up to 200 kV, frequency 50 Hz;

8 Motors Power up to 450 kW, Rating volatge up to 6 kV/phase;

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