Instrument Transformer Test Sets
Marslab-CT/VT
High-voltage metrological mobile lab (HML) rated at 6 - 330 kV
Purpose
- Testing of instrument voltage transformers (VTs) rated from 6 to 330 kV
- Testing of instrument current transformers (CTs) up to 5 kA or up to 30 kA
- Testing of electric energy meters
- Testing of channels within automatic metering and billing systems
- CT and VT burden measurements
- Determining voltage drops in secondary circuits of VTs
- Determining basic power quality parameters (PQP), as defined by IEC 61000-4-30
Marstest-VT-1
High-Voltage Single-Phase Test Set for Voltage Transformers up to 330 kV
Purpose
- Performance and accuracy testing of single-phase grounded or non-grounded instrument voltage transformers of 0.2 accuracy class (or less accurate) with 50-Hz frequency rated from 6 to 220/√3 kV. The Test Set is suitable for primary (post-manufacture) or regular testing of transformers in load points defined by the standard or under an actual load on the secondary side of the VT under test
- Measurement of load power
- Measurement of power quality parameters as defined by IEC 61000-4-30
Marstest-VT-3
High-Voltage Three-Phase Test Set for Voltage Transformers up to 10kV (up to 35kV)
Advantages
- Components are compact and light-weight (can be carried from the vehicle to the location of transformers under test by two persons)
- Suitable for testing either single-phase or 3-phase VTs; Phase-to-phase voltages of 3-phase VTs can be tested using differential connection scheme which includes two reference units (CHVTs)
- Control of test signal quality - using the comparator, it is possible to view the wave shape, THD and harmonics of the applied test signal
Marstest-CT-5
DESCRIPTION:
Scope of delivery
- IT5000 – Adjustable current source
- TTIP – Reference current transformer
- Burden box
- Energomonitor 3.3T1-C
Marstest-CT-30
On-site testing of generator bus-type current transformers rated at 10...50kA according to the commonly applied test procedure hardly appears to be practicable or reasonable. The problem is connected with transportation of test equipment in view of its large size and weight.
The problem was solved by the specialists from D.I. Mendeleyev Scientific and Research Institute for Metrology (VNIIM) in cooperation with NIIVA research institute by developing the ingenious experimental-computational method (MI 3123-2008).
Scope of supply
- CT Test set 5 kA
- Voltage-Current Curve Converter with “Delta-TT” software
TTIP
Portable Current Transformers of instrument class
DESCRIPTION:
TTIP series includes Class 0.05 instrument current transformers (CT). These portable devices are meant for electric measurements in 50Hz AC circuits with nominal voltages up to (and including) 0.66 kV. When used for CT testing, the TTIP series can support test procedures applied (in-lab or on-site) to Class 0.2S or less accurate transformers
CHVT
Capacitive High-Voltage Transducers
DESCRIPTION:
Purpose
The purpose of a high-voltage capacitive transducer is to measure high voltage applied to its high-voltage input by converting it into low voltage values with a standard-compliant scaling factor.
Field of application
A source of reference voltage in transformer test systems (suitable for testing instrument voltage transformers rated from 6 to 330 kV, 0.2 accuracy class or less accurate)
Voltage measurements on the high-voltage side