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T&R Test Equipment
100ADM-F 100A Waveform Filter


T&R Test Equipment 100ADM-F 100A Waveform Filter unit reduces the level of current harmonics when testing electro-mechanical protection relays. This Waveform Filter has been designed for use with the T&R range of secondary injection test sets.

Part Number:
100ADM-F

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List Price

£2838.00
3405.60 incl. VAT)
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T&R Test Equipment 100ADM-F 100A Waveform Filter

The T&R 100ADM-F filter unit reduces the level of current harmonics when testing electro-mechanical protection relays. This Waveform Filter has been designed for use with the T&R range of secondary injection test sets.

All electro-mechanical protection relays have iron cores that saturate and distort the test current under high overload test conditions. The distortion causes significant errors in the measured trip time of these relays during testing. Distortion of the waveform can be a particular problem with disc induction type over-current and sensitive earth fault relays.

For example, testing a CDG11 disc induction over-current relay without a filter causes significant timing errors. The results bellow show the errors for a 1.3s 1A CDG11 over-current relay on its 0.5A plug setting, tested at 5A.

The 100ADM-F filter unit has nine current ranges covering 0.25A to 100A and is supplied in an insulated case, complete with protective cover and carrying strap.

 

T&R 100ADM-F Key Features:

  • Forces test current to a sinusoid
  • Improves timing accuracy when testing electro-mechanical relays
  • 0.25A – 100A ranges
  • High overload capability
  • 50/60Hz operating frequency
  • High efficiency

    


Frequency - The unit may be used at either 50Hz or 60Hz, selectable by a switch on the front panel.

Range Selection - The lower ranges (0.25A-50A) are selected by a switch, and the highest current range is selected by a terminal.

Current Monitor - A current monitoring output is provided on all the filter units that provides an output of 0-100mA corresponding to the rated current for the range.

 

 

 

 

Comparison Chart for: T&R Test Equipment 100ADM-F 100A Waveform Filter

Current Ranges and Ratings
RangeContinuous rating5 min on/ 15 min off
0.25A0.125A0.25A
0.5A0.25A0.5A
1A0.5A1A
2.5A1.25A2.5A
5A2.5A5A
10A5A10A
25A12.5A25A
50A25A50A
100A50A100A
Filter Unit Impedance
RangeImpedance (Ω)
50Hz150Hz250Hz350Hz
0.25A880Ω17.5kΩ30.4kΩ41.5kΩ
0.5A220Ω4.38kΩ7.65kΩ10.3kΩ
1A47.7Ω950Ω1.65kΩ2.25kΩ
2.5A7.8Ω150Ω250Ω360Ω
5A1.94Ω38Ω65Ω90Ω
10A510mΩ9.5Ω16.5Ω22.5Ω
25A85mΩ1.5Ω2.5Ω3.6Ω
50A22mΩ380mΩ650mΩ900mΩ
100A5.5mΩ95mΩ165mΩ225mΩ
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