Neo Tele-Tronix Pvt. Ltd. better known by brand name NTPL serves in the field of Electrical and Testing Equipments for over 35 years located in Kolkata, West Bengal.
NTPL manufactures over 60 different types of test and measuring instruments.
Capacitance & Tan-Delta Measuring Equipment along with its accessories is suitable for testing motors, Power Transformers, H.V. Bushings, Generators, Power Capacitors, cables etc. at power frequency. Periodic measurement of dissipation factor & capacitance on new solid insulators and those on long service period produces comparative result about the trend of deterioration of insulation resistance before insulation breakdown occurs.
Thus, the set is ideal to conduct routine diagnostic tests on solid insulating components, equipment required for High Voltage generation, Transmission and Distribution.
The Set is in four units:
- Capacitance & Tan-Delta Measurement Bridge
- High Voltage AC Power Supply Control Unit
- High Voltage AC Power Supply Transformer Unit
- Standard Capacitor
Standard test modes
1. UST – UNGROUNDED SPECIMEN TEST.
Reduces the effect of stray capacitance to ground. Maximum accuracy is obtained in this mode.
2. GST – GROUNDED SPECIMEN TEST.
Mostly used in outdoor installations, power systems when the object under test is permanently grounded. Exp. Windings of Transformer to tank and core, Coils of Rotating machine, circuit breaker assembly etc.
- GST-G – GROUNDED SPECIMEN TEST WITH GUARD.
Performed to measure stray capacitance and separate it from values obtained in GST test.
Capacitance & Tan-Delta Measurement Bridge
Type Test Voltage Current Capacity
CTDNTE12 0-12KV 200mA Max.
CTDNTE20 0-20KV 2A Max.
Input: 230Volts, single phase, 50Hz. AC.
Capacitance measurement:
Value of Standard Cx x four Resolution Accuracy
Capacitor (Cs) used multiplier range
————————— ———————– —————— ————————————
100 pF 1 pF to 0.11 mF 0.1 pF + 0.2% of reading + .1 pF
1000 pF (1 nF) 10 pF to 1.1 mF 1 pF + 0.2% of reading + 1 pF
10000 pF (10 nF) 100 pF to 11 mF 10 pF + 0.2% of reading + 10 pF
Tan – Delta measurement:
Tan-Delta Tan-Delta Resolution Accuracy
Factor Range
—————- ——————– ———————- ———————————–
0.1 1 x 10-4 to 0.11 2 x 10-6 + 2% of reading + 2 x10-5
1.0 1 x 10-3 to 1.11 2 x 10-5 + 1% of reading + 2 x10-4
10.0 1 x 10-2 to 11.1 2 x 10-4 + 1% of reading + 2 x10-3
- Special shielding arrangement has been designed for this kit to suppress external interference. These enable accurate measurements even in electrically noisy environment particularly in switchyards.
High Voltage AC Power Supply
- Input: 415Volts, two phase out of three phase, 50Hz. AC.
- Test Voltage: Continuously Variable 0-12kV, 50Hz AC.
- Capacity: 200mA maximum in the HV side.
- Duty Cycle: 200mA-15min & 100mA-Continuous.
- Type: Manual, Semi-Automatic, Automatic.
Series Type Test Voltage Current Capacity Duty Cycle
ACHVCTD 12K200m 0-12KV 200mA 15 mins.
100mA continuous
ACHVCTD 20K2A 0-20KV 2A 30mins.
1.5A 60mins.
1A continuous
Metering:
- 31/2 digit digital panel voltmeter & ammeter
Standard Capacitor
Wide range of NTPL Standard capacitors are load loss stable capacitors designed for use with
Capacitance & Tan -Delta Bridge.
| Series : STCCTD. |
| Type : 100P12K 100P20 1000P/12 1000P/20 10n12K 10n20K |
| Capacitance : 100PF+5% 100PF+5% 1000PF+5% 1000PF+5% 1nF+5% 10nF+5% |
| Operating voltage : 12KV 20KV 12KV 20KV 12KV 20KV |
| Max. voltage : 14.5KV 24KV 14.5KV 24KV 14.5KV (1min) |
| Frequency : 50Hz + 10% of operation |
| Actual value of : Actual value indicated on capacitor. Capacitance |
Additional at extra cost
- Range extension current transformer
- Reactor
Sets at other test voltages, capacity, measurement ranges can also be manufactured on request of customer.
Designed & Manufactured according to relevant IS and International Standards.
Note: Specification & design can be altered according to special requirement of the customer.
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