Overview
The HVA45 and HVA45TD are truly compact and portable VLF test sets which determine the condition of medium voltage cables.
HVA45TD device includes integrated Tan Delta diagnostics capabilities and features TD leakage current correction (guard terminal), in comparison to HVA45 device, which can be with the TD diagnostics unit extended.
They both perform VLF and DC testing, as well as sheath testing with sheath fault location mode.
Service and maintenance
With no oil or arcing contacts (both of which require routine servicing), the dry-type transformer makes the instrument almost maintenance free.
MWT
The recently introduced Monitored Withstand Test, a combination of Withstand Testing and Tan Delta Diagnostics in compliance with IEEE 400.2-2013, can be performed.
Features
- Output voltage 45 kVpeak, 32.3 kVrms
- + 4 kV option*: 49 kVpeak, 34.6 kVrms
- Pure sinusoidal output voltage load-independent)
- Internal TD measurement with high accuracy (1 x 10-4)
- Leakage Guard® – leakage current correction
- Output current 60 mA max
- 0.9 µF @ 0.1 Hz @ 32.3 kVrms
- Almost maintenance free device – no oil or arcing contacts
- Highest test capacity of 10 µF
- Ultra light and compact weight (39 kg)
- Protection class IP67 (with closed lid)
- Programmable test sequences
Performance
The HVA45TD offers outstanding features in terms of size, weight (39 kg) and performance (max. 10 ìF) safety.
The instrument has two independent earthing devices (electronic and mechanical discharging) and an integrated 12 kV feedback protection system to protect both operator and instrument Field use: a watertight and very rugged case with a protection class of IP67 (with closed lid) makes additional transport boxes obsolete.Connectivity: on site, no external PC is needed. All results can be downloaded later by USB or Bluetooth for further investigation and easy report creation on the software.
Unlimited operating time: Operating time of the HVA high-voltage generators are not thermally limited and can be operated continuously..
