|
The
trusted name in electric meters |
 General
Details of Electromechanical Meters
| |
Single Phase
|
Three Phase |
|
Rated Current
Ib(Imax) |
2.5(10)A, 5(20)A, 10(40)A,
20(80)A, 5(25)A, 10(50)A, 20(100)A, 5(30)A, 10(60)A
5(40)A, 10(80)A |
10(20)A, 20(40)A, 30(60)A,
50(100)A
10(30)A, 20(60)A, 5(20)A, 10(40)A, 20(80)A, 30(120)A
-/5(10)A CT operated |
| Reference Voltage Un |
240V, 220-250V |
415V, 380-440V |
| Frequency |
50 Hz
|
50 Hz
|
| Rated Thermal Current |
> 130% of Imax |
> 125% of Imax |
| Accuracy |
Class 2 (Class 1 also available) |
Class 2 (Class 1 also
available)
|
| Starting Current
|
0.5% of Ib, at reference voltage and upf
|
0.4% of
Ib, at reference voltage
and upf |
| Voltage Creep |
No creep at 75% and 120% of
reference voltage |
No creep at 75% and 120% of
reference voltage |
| Rotor Weight |
19.5 g (with double jewel
bearing)
22.6 g (with magnetic suspension bearing) |
40.2g (with double jewel
bearing)
44.7 g (with magnetic suspension bearing) |
| Torque |
Imax/Ib = 2; > 4.8 gm-cm at
Ib
Imax/Ib = 3, 4; > 4.4 gm-cm at Ib
Imax/Ib = 5, 6; > 4.0 gm-cm at Ib
Imax/Ib = 8; > 3.8 gm-cm at Ib |
Imax/Ib
= 2; > 9.2 gm-cm at
Ib
Imax/Ib = 3, 4; > 8.1 gm-cm at Ib
Imax/Ib = 6; > 7.8 gm-cm at Ib
|
Speed of Rotor
at Ib upf |
Imax/Ib = 2; 24 rpm
Imax/Ib = 3, 4; 18 rpm
Imax/Ib = 5 15 rpm
Imax/Ib = 6 12 rpm
Imax/Ib = 8 9 rpm |
Imax/Ib = 1.2, 2; 24 rpm
Imax/Ib = 3; 15-16 rpm
Imax/Ib = 4; 12 rpm
Imax/Ib = 6; 9 rpm
|
| Voltage circuit loss |
< 0.98 W, 3.9 VA |
< 0.95 W, 3.9 VA per phase |
| Current Circuit loss |
< 0.4 VA (0.25 W) at rated
current |
< 0.4 VA (0.25 W) at rated
current (per phase) |
| Dielectric Test |
50 Hz, 2500 V Pc |
50 Hz, 2500 V Pc |
| Insulation Resistance |
More than 20 M-ohm at 500Vdc |
More than 20 M-ohm at 500Vdc |
| Voltage Shock |
10 KV Impulse Voltage, 1.2/50 |
10 KV Impulse Voltage, 1.2/50 |
| Adjustment Range |
5%Ib,
upf - more than 18%
Imax/2, upf - more than 12%
Imax/2, 0.5 pf - more than 3% |
5%Ib,
upf - more than 14%
Imax/2, upf - more than 12%
Imax/2, 0.5 pf - more than 3.3% |
| Meter Weight |
1.15 kg (approx.) |
3.05 kg (approx.) |
| Relevant Standard |
IS:13010, IEC 521, BS 5685 |
IS:13010, IEC 521, BS 5685 |
General
Details of Electromechanical Meters
Characteristic
Curves of Electromechanical Meters
|