Atec Biddle-27000 - Manual (Page 5)

PARTIAL DISCHARGE DETECTION SYSTEMS
Pulse Rise Time
Less than 100 ns (10 to 90%)
Pulse Repetition Rate: Once per half-
cycle of the test voltage
Repetition Synchronization Range
47 to 500 Hz
Pulse Phasing
Continuously adjustable
Evaluation Unit
Digital Display
3 1 /
2
digits, 0.5 in. (13 mm) high, di-
rect reading (of selected channel)
Available Channels
Peak, average, power
Peak Partial Discharge Channel
Span: 1 to 1000 pC
Ranges: 0 to 5/10/50/100/500/1000 pC
Accuracy:
±
3% of full scale
Rise Time
Analog Mode (10 to 90%) : 80
µ
s to
2.2 ms, variable
Digital Mode (0 to 100%): Less
than 1.0 s
Fall Time
Analog Mode (90 to 10%): 2 s
Digital Mode (100 to 0%): Less
than 1.0 s
Average Partial Discharge Channel
Span: 0.01 to 50
µ
A. in six ranges
Accuracy:
±
3% of full scale
Averaging Time Constant: 1.3 s
Apparent Partial Discharge Power Loss
Span: 0.01 to 10,000 mW
Accuracy:
±
5% of full scale
Trip Level Detector
Span: 0 to 100% of selected peak
partial discharge range
Trip Relay Contacts
1.0 A (max. carrying current)
0.25 A (resistive switching current)
Pulse Count per Half-Cycle Selector
Pulses per Half-Cycle: 1, 2, 3 or 5
Half-Cycle Logic Range: 1 to 8 half-
cycles of the test voltage (by
internal dip switches)
Display Windows
Synchronization Frequency Range:
47 to 500 Hz
Start Angle Range: 0 to 180
°
Duration Angle Range: 5 to 180
°
ORDERING INFORMATION
Item Cat. No.
Series 27000 Partial Discharge (Corona) Detector ............... 6627000
Optional Accessories
Cable test amplifier ...................................................................... 25960
General-purpose amplifier ....................................................... 25960-2
Transformer test amplifier ....................................................... 25960-3
Windows-based software package for test report generation,
including fiber-optic RS-232C interconnection cable,
486-class, IBM-compatible computer, 3.5-in., high-density
floppy drive, VGA color monitor and compatible dot
matrix printer ........................................................................... 33730
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