ORTM-4 Recloser Testing System Simplifying Recloser Testing

The ORTM-4 system is a sophisticated recloser testing accessory used in conjunction with primary injection testing of oil and vacuum-type reclosers.

The ORTM-4 system reads currents encountered in recloser testing, determines the true RMS values for each current pulse, and measures the time of each pulse. The unit is an electronic current monitoring accessory used in conjunction with an IBM PC compatible computer and any system for primary injection testing of oil and vacuum-type reclosers and sectionalizers. It incorporates advanced circuitry and software which provide an accurate, inexpensive and efficient means for monitoring output current and time for proper testing and calibration. Real-time digital waveform recording and analysis provides true RMS readings of current, including DC offset and decay, for excellent correlation of results with manufacturers’ calibration.

The Ortmaster interface module is designed to connect to the output of any recloser test set. It interfaces to a USB port of any IBM compatible computer, and a Windows program displays trip current, trip times, and reclose times for up to five recloser operations. A precision 10 bit A/D converter reads the current flowing through the bus bar or cable connection at the bottom of the rugged steel enclosure, and stores the waveform in memory. A continuous readout of TRUE RMS current is indicated at all times, and accurate readings of time and current for each operation are displayed as they occur. After the test, one may view and analyze the waveform of each shot, and this waveform can be saved to disk for future reference.

Software is included which uses a database of various recloser types, and can compare readings to manufacturers’ data for immediate GO/NOGO verification of test results. Test results can be saved in a dBase III+ compatible database and formatted reports printed.

105-130 VAC, Single Phase, 50/60 Hz, 15 VA

OUTPUT and Interface
Standard USB-B port for control and data acquisition.
120 VAC convenience outlet for computer (1.5 A Maximum).


CURRENT INPUT (50% duty cycle, 5 minutes max.):
Shunt, with 1/2″-13 hardware, 1000 Amperes

0-50/100/250/500/1K/2.5K/5K/10K Amperes Full Scale

CURRENT ACCURACY (add 1% if not field calibrated):
+/- 1% Full Scale (Continuous)
+/- 2% Full Scale (Pulse)

Range: 0-99.999 seconds
Resolution: 0.0004 seconds
Timebase Accuracy: +/- 0.005% of reading

+/- 0.01 Seconds

Height: 13.00 in. (330 mm)
Width: 8.0 in. (203 mm)
Depth: 6.0 in. (152 mm)
Weight: 18 lb. (8.2 kg)

USB cable ass’y, 6 ft (1.8 m) 1 pc.
Removable line cord, 6-8 ft (1.8-2.4 m) 1 pc.
Operation Manual 1 pc.
Software 1 pc.

Electrical Test Instruments, LLC
D/B/A ETI Precision
8430 Spires Way, Suite A
Frederick, MD 21701

Phone: 410-857-1880
Fax: 410-857-1387
Email us

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