Calisto Monitoring Accessories

PDDC-17 PD Decoupler

• For use with rotating machines
• Designed for PD signal transmission with a bandwidth above 30 MHz at 50 Ohm matching resistance
• PD decoupling unit with integrated PD measuring impedance for decoupling of PD pulses from the standard PD measuring circuit according to IEC 60270
• Voltage signal for phase resolved measurements
• Composite PD and voltage signal, additive superimposed

PDDC-24—Failsafe & LF Coupler

For use with rotating machines.

• Designed for PD signal transmission with a bandwidth above 30 MHz at 50 Ohm matching resistance. It also transmits test voltage signals at the same wire.
• PD decoupling unit with integrated PD measuring impedance for decoupling of PD pulses from the standard PD measuring circuit acc. to IEC 60270
• Voltage signal for phase resolved measurements
• Composite PD and voltage signal, additive superimposed
• Integrated high-voltage fuse

BC Matching Unit

• For use with rotating machines
• Works with your previously installed couplers for PD testing in rotating machines
• Designed to adapt conventional PD measuring methods to the 80pF-Line coupler
• Improves signals from existing couplers
• Avoids outages that would be needed to replace high frequency couplers with low frequency couplers

UHF Drain Valve Sensor DN50/DN80

• For use with HV Transformers
• Designed for decoupling of electromagnetic PD signals from inside of transformers
• Sensor fits into DN 50 or DN 80 drain valves
• Supports “Performance/Sensitivity Check” where high frequency test pulses can be injected with further integrated electrodes
• Grounded sensors (for low frequencies)

UHF PD Plate Sensor

• For use with HV Transformers
• Used for the decoupling of electromagnetic UHF PD signals from the inside of the transformer tank
• Designed to retrofit transformers that do not have oil flanges with free internal tubes
• Can be installed on new transformers during manufacturing
• Used for testing and optimizing mechanical properties such as oil-tightness, thermal withstanding of changing temperatures and pressure withstanding

LDWS-T Sensor

• For use at HV cable terminations
• For decoupling of PD signals (TNC-socket)
• High impedance version
• For ungrounded and grounded devices

HFCT-300 sensor

• For use at cable terminations
• Hand-held split-core sensor specially designed for coupling out high frequency PD-signals
• Applicable for PD tests on any part of the PD signal loop between the insulation electrodes where the outgoing and incoming signals do not cancel each other out
• For highly sensitive PD measurements with superposed line currents or high reactive currents (50/60 Hz) which can reach up to 300 A

HFCT-300WT sensor

• For use in decoupling high frequency PD-current signals.
• Sensor can be applied for PD-monitoring on any part of the PD-signal loop between the insulation electrodes.
• Can be used for highly sensitive PD-measurements where superposed line
  currents, compensating currents or high reactive currents (50/60 Hz) can reach up to
  300 A.

HFCT-100 (mini) sensor

• The HFCT mini allows continuous monitoring of partial discharge from transformer bushings.
• Three channels are provided for one bushing set
• When used in conjunction with Doble IDD, the HFCT mini, is placed in the signal path between the bushing sensor and the Doble IDD input, detecting PD emitted from the bushing via the sensor cable. The emitted PD can be measured by a Doble PD-Guard, receiving signals from the Doble HFCT mini outputs.

HFCT, 5 inch ID

• For laboratory and field testing, this probe has a large inner diameter of 127mm to accommodate large cable bundles.
• Has a typical transfer impedance of 13dBΩ (+2dBΩ) over the frequency range of 1MHz – 100MHz.
  • The RF current range is 10 amperes CW, and 100 amperes peak with a duty cycle of 0.1. The maximum primary power line current is 350 amperes from DC – 400Hz.

UHF Spacer Sensor

• For use in GIS
• Antenna for polymeric spacers or glass inspection windows
• The sensor can be placed across a joint on a GIS to find evidence of partial discharge inside

TEV-Probe

• For use in GIS
• Capacitive sensor for metalclad switchgear
• Connects to PDS100/PDS200/DFA300 and PD-Smart

Bushing Sensor Type A (BTT-A-04)

• Tap sensor with connector, circular bayonet-style.
• This sensor will fit test taps with either a 3/4 -14 NPSM or 2 1/4 -12 UNS internal thread

Bushing Sensor Type T (BTT-T-04)

• Tap sensor with connector, circular bayonet-style.
• This sensor will fit test taps with either a 3/4 -14 NPSM or 2 1/4 -12 UNS internal thread