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Model RVM 5462 Advanced Recovery Voltage Unit
 

Overview
The Recovery Voltage Method is based on established knowledge: the phenomenon of the polarization of oil paper impregnated insulation.

Many "high-voltage-working people" have made this painful experience: of short-circuiting a high voltage capacitor (which was previously charged with a DC voltage), and measuring a voltage more or less than zero (0) volts and so believing that the capacitor is completely discharged, and when touching the connectors of the capacitor receive a shock. This shock is due to the polarization of the insulation.

There are different types of polarization. In case of moist oil paper insulation, there is a polarization due to the water molecules contained in the insulation. By applying a DC voltage, these molecules (which were electrically neutral) acquire a polarity and try to drift in the direction of the electrical field. This means, molecules are now energized. We can short circuit and afterwards open the circuit. Some energy is still stored in the molecules. We can measure a voltage due to this stored energy, which is called the "recovery voltage".

By this method, insulation condition is examined by tracing the polarization spectrum from results of the recovery voltage measurements.
 

Model RVM 5462 Advanced Recovery Voltage Unit

 

Features

  • LCD screen shows results in alpha-numerical and graphical form.
  • Measurement methods: charging voltage, recovery voltage, initial voltage rise slope, peak recovery voltage, time to peak, insulation resistance, polarization index, polarization current, interference voltage.
  • Automatic microprocessor-controlled measurement.
  • Definable test procedure helps in reducing the test time.
  • Built-in thermal printer.
  • Built-in test box for self testing.
  • RS-232 interface for computer connection.

Benefits

  • Non-destructive diagnosis of the state of paper-oil insulation systems.
  • Easy to use, ready to measure on power transformers without any knowledge about geometrical or electrical configurations.
  • Clear results indications, as water content in paper and recommended maximum temperature on the transformer.
  Application
  • On-site diagnosis of oil paper insulation on power transformers.
  • Factory detection of non-convenient power transformers drying procedures.

System

Display

16 x 40-character back-light Black and White graphic LCD

Interface

RS-232C

Emergency Switch

Yes

Built-in Thermal Printer

Yes

External Printer Connection

Yes

Built-In Test Box

Yes

Thermal Overheating Protection

Yes

 

Test Voltage

Measuring Range

50V to 2000V DC (adjustable in 1V steps)

Basic Setting

2000V DC

Max. Deviation from set Value

0.2%

Current-Carrying Capacity

5mA (permanent)

Max. Short Circuit Current

200mA (100ms)

Delayed Short-Circuit Protector

Yes

Charging and Discharging Time

tc, td, 10ms to 99.999s

Charging/Discharging Time (tc, td)

0.1 to 10, Basic setting 2

Charging/Discharging Current
Measurement Capability

20mA .....10pA (max. resolution: 1pA)
Error Limits: 1% +5pA

Resistance Range

1MΩ to 1000GΩ
Error Limits: (to 100GΩ)  1.5%

 

Electrometer Data

Measuring Range

-200 V to +1000V

Error Limits

1%

Current Input

≤1pA

 

Environmental Specifications

Operating Temperature

0C to 40C

Storage Temperature

-20C to 70C

Recommended Test Object Temp.

8C

 

General Specifications

Power Supply

85 Volts to 260 Volts AC. 50/60Hz, 40VA max.

Dimensions

47cm (L) x 37cm (D) x 19cm (H)

Weight

10 kg

Standards

Reference and rated operating conditions as per IEC 359, rated range of use I.

Designed in accordance with safety requirements VDE 0411/part 1. and IEC 348 safety class

 

Scope of Supply

Qty 1

RVM 5462 recovery voltage meter with incorporated RS-232C interface, Thermal printer, Built-in test box, and External printer connection.

Qty 1

20 meter Tri-axial measurement cable

Qty 1

10 meter Grounding Cable

Qty 2

Rolls thermal paper

Qty 1

User Manual

Qty 1

Test Certificate

Qty 1

Mains Cable

Qty 1

Software for data acquisition
 

Ordering Information

Haefely Hipotronics RVM 5462

Advanced Recovery Voltage Meter (includes Scope of Supply as above)

 

Optional Accessories

Haefely Hipotronics Data Link

3-meter Data Link for RS-232C interface

Haefely Hipotronics 5462/SWRVM2

Software for data analysis

   

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Macey's Electrical Pty. Ltd.
ABN 17 344 601 468
Unit 1, 49 Gavenlock Road, Tuggerah, NSW Australia 2259
Phone: +61 2 4353 4644    Mobile: 0412 678 925
Email: sales@maceyselectrical.com.au