• Checking the integrity of the secondary winding of current transformers or without the connection to the load;
• Checking conductivity and load-carrying capacity of the secondary winding of current transformers
• Determination of the transformation ratio and phase angle
• Demagnetization of the transformer core of current, testing the second load of voltage transformer
• Testing transformers, without de-energizing them
• Work with the secondary current to 20 A
• Measurement of voltage, current and phase angle
• the 4th small [ZHK] display with the illumination to 40 symbols before the line
• Writing of the results of testing into the memory
• Unloading data of testing down the computer for further the processing
• Nourishment from the network 80-530 VAC or from the built-in storage batteries. Built-in charger for the storage batteries

DESCRIPTION

The analyzer of transformers 505 UTEC is intended for checking the technical parameters of the current transformers and voltage without de-energizing them. Instrument makes it possible to measure the admittance, the transformation ratio, the phase shift of primary and secondary windings, the current and the voltage. Because of the option “load of the secondary winding of the current transformers/of stress” it is possible to determine the capacity of the second load of current transformer, regulating the capacity of the load of the secondary winding of voltage transformer, to produce the demagnetization of the transformer core of current.

The test of the admittance of current transformer makes it possible to conduct testing transformer or without the connection to the load of secondary winding. This test derives the value of the admittance of the outline of current transformer, which can be recorded and used as the original value at the point of the following testings. The shortened out turns, the parallel connection of chains, insignificant worsening in the work of current transformer, defects of the current coil of wattmeter, testing switches, connection for the sake of the high resistance it is easy to reveal from the admittance.

The test of the transformation ratio of current transformer makes it possible to measure the transformation ratio both actual, and most appropriate. If the option of the load of the secondary winding of the current transformer/of stress is established, coefficient can be measured or without the established load. Furthermore, is measured the phase angle between the primary and secondary windings.

The test of the load of the secondary winding of the current transformers/of stress can be executed by two methods. The first method makes possible at the point of user to exert the fixed load to the secondary winding. The second method makes possible at the point of user to apply with the aid of the built-in the analyzer micro-controller the sequence of loads to the secondary winding by duration 1 second, for averting the burning out of resistor. In this case it is possible to examine all values of test for each load used on the display. The values of the currents before and after of the load application are mapped onto display before the percent (%) relationship to each other.

Measurement procedure by 505 removes inaccuracies in testing load in the places, where continuous changes of the currents against the current moment are present. This facilitates the interpretation of indications by user, since the reduction of the second current loops of current transformers, because of the addition of the selected load of second chain, is reflected as the percent relationship of the original value of current. This method makes it possible to react down the second current loops of current transformers to 0.2 a. during the accomplishment of load beyond the secondary winding of voltage transformers both test methods they can be executed with the search coil of stress or without it.

If current transformer has at least 2,5 A before the second loop, can be easily carried out its demagnetization. Test for the rapid demagnetization of current transformer makes it possible to save time and money, preventing the replacement of the working current transformer.

This function applies a number of resistances by the averaged method from 0,1 Ohm to 8 Ohm and back to 0,1 Ohm down the second loop of the transformer of current source. After the application of load this will excite current transformer through the joining about the magnetic characteristic (saturating current transformer) and it will demagnetize transformer core. The data, obtained before the process of testing, can be preserved. Also it is possible to load them in special software for survey and export of the results of testing. Preserved data can be conversely preserved for their further survey down 505.

Instrument for testing the current transformers and voltage of model 505 - this last word before the sphere of testing the current transformers and voltage!

TECHNICAL SPECIFICATION

Voltage of supply of 10-530[V] (600[V] swing) or the build it by Ni -Cad storage batteries

Measured parameters

• The primary current: 10 3000[A], 50/60 Hz (with the special probe)
• The secondary current: 0,1 - 20[A] (25[A] swing) 50/of 60 Hz

Primary contacts of current transformer

• The input voltage: 3[V] of max
• Permission: 1 mV/A, 2 mV/A, 5 mV/A, 10 mV/A, 100 mV/A and 1000 mV/A.

Permission

• Display 4 is small, 40 discharge LCD
• Stress ± of 0,1 v.
• The primary current ± of 0,1[A]
• The secondary current ± of 0,01[A]
• Conductivity ± of 0,01 mS
• Phase angle of 0 - 360º± of 0,1º
• Transformation ratio 999,99: 5 ± 0,01

Error of measurement

• Stress ± 1,0% from the complete scale
• Current ± 1,0% of the complete scale
• Phase angle ± of 1,0º

Test of the conductivity

• Frequency of 1575 Hz
• Limits of the measurement of 0-1mS, 1-10mS, 10-125mS ([avtoranzhirovanie])
• Load of secondary winding 0,14 Ohm
• Error of measurement by ±5% based on the complete scale

Load test

• Current transformer 0,1 0.2 0,5 1,0 2,0 4,0 8,0 Ohm
• Voltage transformer 25, 50, 75, 100, 125, 150, 175 VA

Memory Of flash Of type

Temperature

• the storage: -20°C to of +70°C
• the worker: 0°C to of +50°C

Humidity: 10 to 95% without the condensate with 35°C
Sizes of 25,4 X of 19 X of 21,6 cm
Weight of 5,9[kg] (without the option CT/PT Of burden - load beyond the current transformers/of stress)
7,3[kg] (with the option CT/PT Of burden - load beyond the current transformers/of stress)
Guarantee is 1 year

 Detailed description