Flexible Current Transformers

The flexible current transformers FLEX 3000 ensure safe, accurate and non-intrusive measurements in applications that may be completely inaccessible with conventional current clamps and probes.
The probes provide a linear voltage output that is an exact replica of the input waveform for three user selectable input current ranges of 30, 300 or 3000 Amperes. The standard 610 mm flexible conductor allows a measuring diameter of up to 194 mm.

Advantages

• Ideal for large and hard to reach conductors • Flexible and lightweight, less than a quarter
of the weight of conventional CTs
• No restrictions with regard to duty cycle or overload current

• Selectable current ranges of 30/300/3000A • AC coupled mV output proportional to measured current
• Accuracy: Ein + Em
Ein: Accuracy of instrument input
Em: Accuracy specified by manufacturer
Basic specifications for 45 Hz … 65 Hz: Accuracy: ± 1 % of range Phase error: < ± 1°
Position sensitivity: ± 2 % of reading

The IMP-IF1 interface adapter is suitable for interfacing
MTE reference standards with meters
having retransmitting contacts, open-collector
transistor outputs or true S0-outputs to allow full
testing of meters with these types of outputs interfaces.
IMP-IF 1 functions
• Active input for testing S0 outputs, according
to the DIN 43864 standard
• Input for testing passive pulse outputs such
relay contacts prone to bounce or open collector
transistor outputs
• Input for testing active outputs

Sensors for measurements on high voltage and current potential

The LiteWire sensors are suitable for MTE’s meter test equipment PRS 400.3 and PTT 2.1. The LiteWire is a true RMS meter designed for use by electric utilities to sense currents or volt- age waveforms from the primary side of their distribution networks.

A fiber optic link transmits information as well as establishes isolation between the high voltage potential at the sensor enclosure. The sensors are mounted on a hot stick and slipped over a high voltage line.

A fibre-optical cable connects the sensors to a receiver unit at ground potential.

This receiver contains the digital readout and an analogue output.

The transport pocket has been especially de-signed for the portable working standards PWS 2.3 and PWS 2.3 PLUS and allows transporting the standards well protected and comfortable to the use on site.

The SCD 2003 scanning head support was designed for on-site meter testing with the SH 2003 photoelectric scanning head. The spring mechanism and the different adjusting options make it possible to attach the scanning head support to the meter as desired.

The SH 11 model scanning head was especially designed both for scanning of the marks on the rotating discs of mechanical meters or simulated disc marks on LCD displays and for detection of light emitting diodes (LED’s) of electronic meters. The choice of operation with mechanical or electronic meters is made by simple rotation of a selection switch. The precision optical lens is designed to make the scanning head insensible to external light. Its compact, robust construction makes the head equally suitable for use in stationary test consoles as well as for use with mobile and portable equipment. The impulse output of the scanning head delivers a positive output pulse of the duration 0.5 ms.

The SH 2003 photoelectric scanning head is suitable for use with both LED impulse electronic meters and Ferraris meters, selectable via a switch. Due to its high performance and robust construction it is suitable for both test consoles and portable systems.

The photoelectric scanning head Type SH 2015 is especially designed to detect pulses from electronic meters.

All PTS group test systems one of the MTE products are transport pockets.