Dielectric Test Sets 50/100 kV ac
Dielectric Test Sets • Permits ANSI A92.2 for tests on aerial bucket
trucks • 50-kV tap with doubled output current for ANSI A92.2 bucket liner
testing • Output current meter, with guard circuit, for ANSI A92.2 leakage
current measurements
The 50/100 kV AC Dielectric Test Sets are ac
high-voltage sources for testing electrical insulation. The standard system
includes a control/instrument cabinet, a high-voltage transformer assembly and
all necessary cables including ground and input power. These test sets
consist of general-purpose ac high-voltage sources suitable for dielectric
withstand (high-potential) testing of all types of electrical insulation. They
also permit guarded leakage current measurements and are suitable for use with
capacitance and dissipation factor bridge systems to measure insulation power
factor.
• Continuously variable test voltage • Rugged
field construction • Circuit-breaker protection
The 5- and 15-kV Megohmmeters are high-voltage,
line-operated instruments. They provide a continuously variable test voltage for
highly sensitive insulation-resistance measurements of all types of electrical
equipment and power cable.
The instruments are designed to withstand harsh
field conditions, and feature tough, impact-resistance casing, removable lids
and adjustable carrying straps. For complete portability, there is ample room in
each case to store cables and the instruction manual.
Ultrasonic detection of surface PD
activity. Displayed on the LCD screen as dB reading, as well as audible signals
through headphones.
Measurement of TEV signals generated by
internal PD. Displayed on the LCD screen as dB
reading.
PRPD Mode for viewing PD pattern in power
cycle, allowing for the recognition of noise
Precedence Mode for location of PD within
the assets under test
PD Detection
Partial discharge activity inside metal
clad high voltage plant induces small voltage impulses (called Transient Earth
Voltages) on the surface of the metal cladding. TEVs travel around the cladding
surface to the outside of the switchgear panel where they can be picked up
externally using CC-TEV transducers.
The PD-LSG1 is used to detect, verify and
locate PD activity in switchgear. The unit offers both TEV detection for
internal discharge and ultrasonic detection for surface tracking and
corona.
The PD-LSG1 has three modes: Level Mode, used to detect presence
of both TEV and ultrasonic activity; Cycle Mode, Phase
Resolved Partial Discharge Display (PRPD) enables the user to verify PD activity
is genuine and not from electrical noise interference before taking further
remedial action; Precedence
Mode, dual sensor precedence allows users to pin-point the source of PD
activity.
Advantages of the PD-LSG1
Detect MV and HV problems – before they
occur
Personnel Safety Device – ensure the
substation is clear of PD before conducting work
Locate PD Source – precedence with 240
pico-second timing accurately locates PD within
Switchgear
PRPD – PRPD display allows user to
distinguish between PD and Noise
Hear the PD – only instrument available
that allows the user to hear both ultrasonic and TEV PD
activity
What’s in
the box?
PD-LSG1
Headphones
Sync Transmitter
Function Tester
2 x CC-TEV Sensors , 1 x AA-Ultrasonic Sensor, 1 x
HFCT
Hard wearing moulded protective Peli™ case
(suitable for hold luggage)
Audible output through headphones or built
in speaker
TEV – PD
Detection Partial discharge activity inside metal clad high
voltage plant induces small voltage impulses called Transient Earth Voltages on
the surface of the metal panels. TEVs travel around the surface to the outside
of the switchgear, where they can be picked up externally using the PD-LSGS
detector.
AE – PD
Detection Defects on the surface of high voltage insulators
are prone to a phenomenon known as surface tracking. Tracking causes carbon
deposits that build up over time, ultimately leading to flashover and insulation
failure. The PD-LSGS is highly sensitive to the ultrasonic emissions produced by
tracking and enable the on-set to be detected before insulation
failure.
The PD-LSGS is a dual transducer PD
detector for Switchgear. The instrument detects TEV signals generated by
internal discharge as well as acoustic discharge generated by surface tracking
or corona.
Advantages of
the PD-LSGS
Rapidly survey whole substation – detects MV and HV problems before they
occur
Personnel Safety Device – ensure the substation is clear of PD
before conducting work
Hear the PD – only instrument available that
allows the user to hear both ultrasonic and TEV PD activity
Ergonomic and compact design – fits in the user’s pocket and is
easy to use
Long lasting battery – allowing a whole day of testing without
requiring a recharge
