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THREE PHASE METER TEST BENCH

Three phase meter test bench suitable for calibration & testing of AC Ammeters, Voltmeters, Single phase Energy Meters, Watt Meters, Power Factor Meters, Three Phase Two Wire & Three Phase Four Wire Energy Meters Trivector Meters, Maximum demand indicators, of active & reactive systems, Three phase 3 wire & 4 wire watt meters, Var Meters, Power Factor Meters etc. Other Technical Specifications are as under : 

TECHNICAL SPECIFICATION:-

INPUT

:

400/440 V., A.C. 3 Phase 50 Hz.

OUTPUT TEST VOLTAGE

:

3 x 110/64V., 3 x 440/254V.

TEST VOLTAGE
REGULATION

:

0-120% of the selected range of test voltage.

CREEP TEST VOLTAGE

:

75%, 80%, 100%, 110% & 120% of selected voltage.

CURRENT RANGE

:

0.5-1-2.5-5-10-25-50 & 100A

CURRENT REGULATION

:

0 to 120% of range selected.

STARTING CURRENT

:

0.5%, 0.75%, 1% &1.5% of the range selected.

PHASE SHIFT

:

Built-in Phase Shifting Transformer static type, phase angle variation 90 degree Lag Unity 90 degree lead & in between values continuously variable.

OUTPUT VOLTAGE BURDEN

:

Per phase as per your requirements

OUTPUT CAPACITY

:

As per your requirements

INSTRUMENT TRANSFORMERS

 

3 Nos. with sufficient capacity

POTENTIAL TRANSFORMER

:

3 Nos. Accuracy class 0.5

CURRENT TRANSFORMER

:

3 Nos. accuracy class 0.2

 

CURRENT REVERSAL FACILITY IN EACH PHASE.

PHASE SEQUENCE INDICATOR
THE POWER SOURCE WILL BE PROVIDED WITH THE FOLLOWING MAJOR COMPONENTS:-

1. 3 pole main supply for isolator.
2. Main H.R.C. fuses to protect the system from short circuit.
3. Voltage circuit contactors with overload relay controlled by push button switches.
4. Current circuit contactors with overload relay controlled by push button switches.
5. Push button switches simultaneous operation of Current and voltage circuit.
6. Current coarse selector switch in each phase.
7. Current fine regulation switch in each phase.
8. Voltage regulation in each phase.
9. Power factor coarse selector switch to regulate 30 degree phase shift.
10. Power factor fine regulation in each phase.
11. Voltage range selector.
12. Current range selector.
13. Partial load reduction selector switch.
14. Burden selector switch.
15. Forward / Reverse switches in each phase.
16. Indicating lamps for current circuit.
17. Indicating lamps for voltage circuit.
18. Indicating lamps for main 'ON'.
19. Provision of Individual Phase selection.

 

INDICATING INSTRUMENTS:-

DIGITAL AMMETERS

:

3 Nos.

SINGLE PHASE POWER FACTOR METERS

:

3 Nos.

DIGITAL VOLTAMETERS

:

3 Nos.

DIGITAL FREQUENCY METER

:

1 Nos.

 

The complete system will be assembled in powder coated M.S. horizontal cabinet duly wired and tested. The wiring will be in colour code with ferrules matching circuit diagram will be supplied with the equipment.

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Supreme Instruments Laboratory @ 2006