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Overview

The D30R/D40R/D85R are high performance stand alone impulse generator specifically designed to diagnose faults in very large electrical motors and windings, improving quality in the shop and reducing necessary and costly downtime in the field. The 30-40kV output allows you to thoroughly test larger windings with lower impedance and higher capacitance. The D30R/D40R satisfies the requirements of testing the windings of both AC motors and DC armatures by producing a Surge with higher voltage and instantaneous current.

• The D30R/D40R/D85R offer you all of the convenient features of digital technology. It performs Resistance, DC HiPot and Surge tests along with incorporating a supply monitor to insure safe operation from a well grounded supply. Additional safety features include a front panel emergency stop switch, zero-start interlock, and a test conclusion forced ground relay on output leads. The control and display module provides the user with comprehensive testing results.
• The Resistance test verifies the existence of dead shorts within the turn-to-turn coils, shows any imbalances between phases due to turn count differences, along with locating poor wire connections or contacts.
• The DC HiPot test can also be done in the D30R/D40R/D85R. Test voltage is set by the output control from 500-30000 for the D30R and D85R, and 500-40000 for the D40R. Current is displayed and an overcurrent trip circuit monitors the test. If current exceeds the trip level, the test is automatically halted. In its most sensitive setting, the protective circuit will operate as low as 10 micro amps.
• The Surge Test's voltage rise time is 100-200 nanoseconds, so the D30R/D40R/D85R comply with IEEE Standard 522-1992 and IEC Standard 34-15 when testing motor windings and coils.
• The D30R/D40R/D85R is housed in a mobile case with the control unit permanently affixed to the upper face. 60kV high voltage test leads are provided along with dedicated Kelvin Resistance test leads for convenient portable testing. These features along with the unsurpassed testing capabilities make the D30R/D40R/D85R powerful and technically advanced for in house shop or field environments.
• The D85R also has the capability of testing armatures. Manufacturers and rebuilders of industrial DC motors prefer the bar-to-bar test method over span testing to preserve quality control. When attempting to surge test lower impedance devices (i.e. lift truck, transit, traction armatures, fields, interpoles) a tester may lack the necessary output current to achieve appropriate coil test voltage levels. The bar-to-bar method provides a higher energy insulation test than any other technique.