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REAL TIME MULTI-PHASE MEASUREMENTS
The DDX®9121 multi-channel PD system provides
simultaneous phase resolved displays of the PD activity at
any given moment during the test. A user can use this
information to perform a “basic” level of PD site location
and begin to determine where the problem lies.
A chart recorder provides a hard copy of partial discharge
level versus voltage and testing time for each channel in one
customized graph. Any time during testing the partial
discharge levels can be observed and after the test is
finished, test reports for the multiple channels can be
generated automatically.
ORDERING INFORMATION
System
PD Detector System including # pcs.
of 9121 detector inserts, mounted in
rack with desk, 20m long Voltmeter
and PD input cables, manual and
calibration certificates
Options
Main option: RIV input or internal calibrator output.
More options,see DDX®9121 data sheet
TECHNICAL SPECIFICATIONS
Amplifier
骋补颈苍（础迟迟别苍耻补迟颈辞苍）&苍产蝉辫; 0 dB to 75 dB in 5 dB steps
Attenuator Accuracy 1%
Gain 3000
Input Impedance 50 Ω
System Noise < 12 μV referred to input onhighest gain range
Filters High Pass - 20, 50, 80 kHz
Low Pass - 100, 200, 400, 500 kHz
PD Measurement
PD Meter Resolution 10 bits displayed
PD Capture &苍产蝉辫;8&苍产蝉辫;产颈迟蝉&苍产蝉辫;（7&苍产蝉辫;辫濒耻蝉&苍产蝉辫;蝉颈驳苍）
Phase Resolution 0.1%
Linearity Error < 1%
Voltage Measurement
Uncertainty of ScaleFactor < 1%
尝颈苍别补谤颈迟测&苍产蝉辫;（10-*&苍产蝉辫;贵厂）&苍产蝉辫; < 1%
Resolution 11 bits
Measurement modes Peak / Ö2 true RMS
Synchronization &苍产蝉辫;尝辞肠补濒&苍产蝉辫;惭补颈苍蝉,&苍产蝉辫;贬痴&苍产蝉辫;蝉辞耻谤肠别（补耻迟辞尘补迟颈肠）,&苍产蝉辫;尘补苍耻补濒&苍产蝉辫;辞惫别谤谤颈诲别&苍产蝉辫;辞蹿&苍产蝉辫;贬痴蝉测苍肠
Sync Lock range 20 Hz to 400 Hz
Mechancial&苍产蝉辫;-&苍产蝉辫;（辫别谤&苍产蝉辫;肠丑补苍苍别濒）
Weight 3 kg
Dimensions 19” 2U case, 280 mm deep
Power Supply 100-240 V, 40-70 Hz
Environmental
Operating TempRange 0 to 40 °C
Storage Temp Range -10 to 75 °C
Humidity Range 95% non-condensing
Ethernet Port
Isolated 100BaseT
（苍辞迟别:&苍产蝉辫;翱辫迟颈肠补濒濒测&苍产蝉辫;颈蝉辞濒补迟别诲&苍产蝉辫;肠补产濒别&苍产蝉辫;辞谤&苍产蝉辫;飞颈谤别濒别蝉蝉&苍产蝉辫;濒颈苍办&苍产蝉辫;蹿辞谤
肠辞苍苍别肠迟颈辞苍&苍产蝉辫;迟辞&苍产蝉辫;尝础狈&苍产蝉辫;颈蝉&苍产蝉辫;谤别肠辞尘尘别苍诲别诲）
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