Wires And Cable Spark Test Instrument— Spark Tester

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Industry Frequency Wire Cable Skin AC Spark Tester

Frequency AC Spark Tester is a special-purpose test apparatus to detect fault of insulation on wire and cable. Integrated with the technology of solid-state AC voltage regulation and single piece microprocessor control, the machine features steady voltage output (unaffected by variation of supply voltage), high sensitivity of fault detection, versatility, user-friendliness, safety and reliability, new construction and beautiful appearance.
The work principle of the spark tester is as follows: Make the tested wire pr cable travel through the high voltage bead-chain electrode having test potential supplied by a commercial frequency HV transformer. If the insulation has fault, breakdown will occur, namely the output of the HV transformer will cause a HV spark short-circuit. The short circuit current flows from the output terminal of the HV transformer through insulation fault-conductor of cable-earth-ground-HV transformer to form a circuit.
Therefor both the spark tester and the conductor of cable shall be soundly earth-grounded otherwise the short circuit cannot be formed and the cabinet of the spark tester and conductor of cable may have high voltage.
Work conditions
Supply voltage:AC220V±10%
Supply frequency:50±2Hz
Ambient temperatures:0~40c°
Relative humidity, max:85% (without condensed water)
Mode of operation: continuous operation
Breakdown indication
Mode of indication: Breakdown count and voice/light alarm
Count range: 0~999
Time duration for voice/light alarm:0.5-15adhustable
Safety interlock
In order to ensure safety for operators, the probe is provided with an interlock switch and a discharge rod .When the front hood is opened, the high voltage is cut off first, then the discharge rod touches the electrode section to discharge the remaining electricity
Technical Parameter
Type
ST-15A
ST-25A
ST-25AT
Voltage output
1.0-15kV
2.0-15kV
2.0-15kV
Voltage indication error
<5%
<5%
<5%
Detection sensitivity
<600μA
<600μA
<600μA
Stability
Complying with the requirements of GB3048.9-1994 and JB/T 4728.10
Dectection resolution
0.05s
0.05s
0.05s
Transient breakdown current
100mA
50mA
50mA
Steady short-circuit current
<20mA
<20mA
<20mA
Detction Speed, Max
300m/min
350m/min
350m/min
Overall diameter of tested wire or cable, max
≤30mm
≤55mm
≤100mm

Related Machine


DC Spark Tester
ST-15D DC Spark Tester is a useful tool for detection of surface damage as well as for spark test for wire and cable with a
diameter below 10mm. The DC high voltage tester recommended internationally is characterized by advanced design, new construction, steady voltage output, high sensitivity, adaptability, easy operation, versatile mounting, safety and reliability. It may be used for on-line testing in combination with a pair twister or an extruder as well as for intermediate testing and testing for finished products.
The ST-15D compact integrated tester of which the probe ,console display and support make one block, features compact size and easy mounting. It is used mainly for on-line testing in an extruding line with non-centralized control and in combination with a pair twister.
Type
ST-15D
Voltage output
DC 0-15000V
Effective test voltage
DC 500-15000V
AC pulse ratio
<5%
Voltage stability
The power supply voltage fluctuates by ±15%, and the output voltage remains unchanged
Breakdown sensitivity
<600μA
Steady-state short-circuit current
3-4mA
Max.frequency of breakdown counting
10times/sec
Max.diameter of the tested wire
10mm
Max.moving speed of the tested wire
2800m/min

Operational conditions
line voltage: AC220V±15%
Power frequency: 50±2Hz
Power input: 50VA
Ambient temperatures: -10~45ºC
Relative humidity<85% (without condensed water)

Breakdown signal
Mode of operation:Continuous
Auto mode:Audio/visual alarm and breakdown counting
Manual mode:Audio/visual alarm, breakdown counting
and control signal output

Safety interlock
In order to ensure safety for operators, the probe is provided with an interlock switch and a discharge rod.
When the front hood is opened, the high voltage is cut off first, then the discharge rod touches the electrode section to
discharge the remaining electricity.

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