NR7000 Tan Delta Tester is a kind of instrument with high precision fully automatic measuring the dielectric loss tangent and capacitance of various high voltage electrical equipment in the power plants and substations. The adoption of frequency conversion technology would ensure the accurate measurement in the interference of strong electric field. The instrument adopts the English menu operation and the whole process is measured automatically through microcomputer. The instrument is also applied to the measurement of tan delta and capacitance of high voltage electrical equipment in the workshops laboratories and research institutes.
It could measure non-grounded or grounded high voltage equipment adopting positive and negative connection method. Besides it can measure the tgδ of capacitive voltage transformer and the capacitance of main capacitor C1and C2.

Characteristics and functions
(1) Equipped with high voltage step-up transformer and security measures like zero-cross closing lightning protection etc.
(2) It can output different levels of high voltage ranging from 0.5KV to 10kV during the test and the operation is simple and safe.
(3) Under the circumstance of oil dielectric loss ≥ 0.01% with oil cup positive wiring can be used to measure the dielectric loss of oil.
(4) The instrument is equipped with the following protection functions:
• High voltage short-circuit protection
• CVT over-voltage protection
• Poor grounding protection

Product Accessories

1	NR7000 Tangent Delta Tester	1 piece
2	High-voltage HVx test cable (red)	1 piece
3	Low-voltage Cx test cable (black)	1 piece
4	Low-voltage Cn test cable (black)	1 piece
5	High-voltage input test cable (for CVT dual-core)	1 piece
6	Low-voltage output test cable (for CVT dual-core)	1 piece
7	220 V power line	1 piece
8	Ground wire	1 piece
9	Fuse printing paper	for spare
10	Operation manual	1 copy
11	Factory test report	1 copy
12	Warranty card	1 copy

High voltage output:	0.5 ~ 10kV Increasing by 500V for each level a total of 20 levels capacity: 1500V
Accuracy:	tgδ: ± (reading 1.5% +0.06%) Cx: ± (reading 1.5% +5 PF)
Resolution:	tgδ: 0.01% Cx: 1pF
Measuring range:	0.01% < tgδ < 100%
Internal applied high pressure:	3PF ~ 60000PF/10KV 60PF ~ 1µF/0.5KV
External applied high pressure:	3PF ~ 1.5µF/10KV 60PF ~ 30µF/0.5KV
Power supply:	AC 220V ± 10% 50/60 ± 1Hz
Measuring method:	A. work frequency: 50 (50Hz measuring) 60 (60Hz measuring) B. different frequency: 50D (45Hz / 55Hz measure each time) 60D (55Hz / 65Hz measure each time) Automatic frequency conversion
Harmonic adaptation:	≤ 3%
Application condition:	-15 ℃ - 50 ℃ Relative humidity < 80%
Dimension:	460 (L) × 345 (W) × 345 (H)
Weight:	35 kg