LW-1 Print _CMN_EMAIL_ALT

Ferrodynamic wattmeters LW-1

 The LW-1 ferrodynamic wattmeter’s are designed for the measurement of power in DC and AC single-phase circuits at frequencies ranking between 15 and 200 Hz and power in three-phase three-wire networks with artificial neutral point measuring system. For these measurements an additional OD 41 type adapter is used in conjunction with the wattmeter.

Type LW-1 wattmeter’s find wide application in industrial  and scientific laboratories, didactic work-rooms, testing stations and wherever high accuracy of power measurement is required.

General Information:

  • The LW-1 instruments are easy and safe in use;
  • Type LW-1 meters have a ferrodynamic measuring system;
  • The current and voltage ranges are changed by means of the rotary selector switch;
  • Appropriate construction of meter and thorough workmanship assure reliability of operation and high accuracy of measurement during a long service life.
  • The pointer, narrowed at the end and the mirror scale enable readings to be taken accurately and free of parallax error;
  • using a type OD-41 accessory in conjunction with the type LW-1 wattmeter for measurement in single-phase circuits, six voltage ranges of the following nominal end values can in addition, be obtained: 150-250-300-450-500 and 600 V.

Technical specification

  • Accuracy class:
0,5;
  • Number of design versions:
5;
  • Scale length:
110 mm;
  • Nominal power factor:
cos φ 0..1;
  • Voltage range:
(0,8 ...1... 1,5)Un;
  • Current range:
 (0…1…1,3) In
  • Frequency range:
15 ...50...200 Hz;
  • Insulation test voltage:
2 kV;
  • Overall dimensions:
155 x 210 x 85 mm;
  • Mass. approx.:
 1,5 kg.

Rated currents In Rated voltages Un Measuring range end values Current circuit resistance mΩ Current circuit inductance µH
0,5A
1A
100-200V
400V
50-100W
200-400W
3200
820
6300
1550
1A
2A
100-200V
400V
100-200W
400-800W
820
220
1550
400
2,5A
5A
100-200V
400V
250-500W
1000-2000W
170
48
250
63
5A
10A
100-200V
400V
0,5-1kW
2-4kW
50
14
63
16
10A
20A
100-200V
400V
1-2kW
4-8kW
18
5,2
16,5
4,1
  • Voltage circuit resistance:  150 Ω/V.

Nominal operating conditions:

  • Ambient temperature:
13...23...33ºC;
  • Ambient air relative humidity:
25...40...60...85 %;
  • Operating position of instrument:
 horizontal.

Standard equipment:

  • Meter LW-1;
  •  Operation manual;
  •  Guarantee certificate.

Others information:

Others information:

Catalogue card 
Operation manual
 
< Prev   Next >