Tester de aparat BENNING ST 725

General Details

Mains-operated and battery-operated Appliance Tester for mobile testing of electrical devices

  • mobile – network-independent testing due to battery operation
  • easy – operation by means of push-buttons
  • quick – testing within a few seconds
  • all-in-one – protective conductor current measurement by means of differential current or alternative leakage current measurement method

Testing of devices with mains voltage-dependent switching elements/ mains supply units/ relayssuch as controlled devices/tools, devices of information and communication technology as well as of devices which can be tested completely with mains voltage only.
In mains operating mode, the protective conductor current/ contact current is measured by means of the required differential current/direct measurement method.

New product features

  • storage locations for 999 test samples
  • 3 hot keys for storing, calling and printing the measured values
  • mini-USB interface and download software for the preparation of test certificates in MS Excel®
  • direct printing function for printing test certificates on site by means of optional printer BENNING PT 1
  • prolonged functional test and differential current measurement (max. 2 x 5 minutes)
  • integrated real-time clock for storing the measured values including the test date


  • automatic testing procedure for devices of class I (key 1), class II/III (key 2) and line test (key 1)
  • testing of cable reels, multiple distributors and device connecting cables with IEC connector
  • measuring result with „PASS / FAIL” indication
  • limiting values preset
  • mains operating mode for tests under operating conditions
  • battery operating mode for mobile testing
  • reduction of the ISO testing voltage for devices with overvoltage arresters
  • indication of correct function key in case of incorrect operation, overload and if the test sample is not switched on
  • sufficient battery capacity for more than 2,500 test samples

Measuring functions

  • protective conductor resistance with a pulsed testing current of ≥ 200 mA (required in case of oxidized contacts
  • insulating resistance with a testing voltage of 250 V and 500 V
  • mains operating mode: protective conductor current/contact current by means of differential current/direct measurement method with automatic mains pole reversal
  • battery operating mode: protective conductor current/contact current by means of alternative leakage current measurement method
  • active testing of three-phase devices under operating conditions by means of optional measuring adapters (item no. 044140/044141)
  • testing of permanently installed and portable 30 mA RCDs/PRCDs with tripping time measurement
  • voltage measurement on external shock-proof socket
indication graphic display
protective conductor resistance 0.05 Ω – 20 Ω
testing current ± 200 mADC
insulation resistance 0.1 MΩ – 20 MΩ
testing voltage 250 V / 500 VDC
protective conductor current/ contact current by means of
-differential current measurement 0.1 mA – 20 mA
-alternative leakage current measurement 0.1 mA – 20 mA
-direct measurement 0.1 mA – 20 mA
RCD testing current 30mA – 150 mA (5-fold)
tripping time 0 ms – 500 ms
protective conductor current of three-phase test objects under operating conditions (optional) 0.25 mA – 10 mA
line test RPE, RISO, short-circuit test and continuity, test of phase conductor (L) and neutral conductor (N)
voltage measurement on external shock-proof socket 50 V – 270 V (L-N, L-PE, N-PE)
scope of delivery carrying case, test cable with alligator clip, mains connection cable, appliance cable, download software (CD), USB cable, battery set
item no. 050316
overview catalogue (english) Download
Video (german) Download
Technical report – Electrical test of working equipment (german) Download
instruction manual Download
test certificate (Excel) Download
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