"IBL" make Relay Test Set, RNT33 & ZNT33 are suitable for testing distance relays. However, other relays
like overcurrent, over voltage, undervoltage, earthfault etc. can also be tested by this relay test set.
ZNT33
Input Voltage: 415V+10%, 3 phase, 4 wire, 50Hz. AC.
Output(s):
[a] Current output(s) [3 phase] available by smooth variation of variable autotransformer.
Range: 0 to 1,5,10,25 & 50A having 0 to 100% regulation in each tap selectable one at a time.
Rated maximum burden: 250VA.
Protection against overload, short circuit provided.
Multi-ratio wound primary measuring CT.
[b] Voltage Output(s):
RNT33:
110V, 3 phase 50Hz. AC having 6 different taps at 10%, 70%, 80%, 90%, 100% & 110%.
Rated maximum burden: 250VA.
Only B phase is continuously variable at any of the selected tap voltage.
DC voltage source: Isolated 0-110V/220V continuously variable DC of 100VA, without metering will be
available for 30 mins.
ZNT33:
110V AC, phase to phase, 63.5V phase to neutral, 3 phase 50Hz. AC continuously variable from 0 to
110%. Rated maximum burden: 250VA.
DC voltage source: Isolated 30V/110V/220V continuously variable DC of 100 VA, without metering will
be available for 30 mins.
[c] Phase Shifter
Phase Shifting can be done at any value between 0 to 3600 by coarse & fine control. Capacity: 250VA.
[d] Time Interval Meter Measuring Range: 9.999secs. & 99.99secs.
Special feature:
ZNT33: Added facility over RNT33 is in selection of fault vector in 1 phase to earth fault or phase to
phase fault. In ZNT33, the voltage of the healthy phase will remain unaltered.
Current, Voltage, Phase angle variation, Timer measurement will be indicated by respective digital meters.
RNT33 & ZNT33 for Institutional & Laboratory Applications
RNT33 & ZNT33 is designed for educational institutions, research centers, universities, and laboratory facilities. Interlabs manufactures export-quality educational laboratory equipment for institutional procurement projects, technical education programs, laboratory modernization, and international supply requirements across South Africa, Ghana, Uganda, and Tanzania.
Applications of RNT33 & ZNT33
This equipment is widely used for practical learning, institutional research, technical demonstrations, and laboratory education. It supports practical learning environments, institutional laboratory setups, technical training programs, and advanced educational applications.
Suitable For
- Universities and educational institutions
- Research laboratories and training centers
- Government and institutional procurement projects
- African laboratory infrastructure programs
- Technical and vocational education facilities
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Why Choose Interlabs?
- Educational laboratory equipment manufacturer and exporter
- OEM and custom manufacturing support available
- Export-ready packaging and documentation assistance
- Suitable for institutional and government projects
- Global shipping and bulk supply capability
Global Export Support
Interlabs supplies laboratory equipment and institutional training systems to buyers across South Africa, Ghana, Uganda, and Tanzania with secure export packaging, documentation support, and international logistics assistance.