HWZ-D Comprehensive on-site error tester for current transformersDetailed product description：

The HWZ-D transformer on-site error comprehensive tester does not require standard current transformers, current transformers, load boxes, voltage regulation control boxes, and high current wires. It uses extremely simple testing wiring and operation to achieve the calibration of current transformers, greatly reducing work intensity and improving work efficiency, making it convenient to carry out on-site transformer calibration work.

Main features of HWZ-D current transformer on-site error comprehensive tester
1. The standard measurement error (angle difference, ratio difference) of 1% -120% (S-level) between national standard measurement current transformers and non-standard measurement current transformers.
2. Any error (angle difference, ratio difference) of 1% -200% (S-level) between national standard measured current transformers and non-standard measured current transformers.
3. One measurement and display of the national standard for measuring the upper and lower limit loads of current transformers, and able to test the error (angle difference, ratio difference) at any percentage point.
4. One measurement and display of the standard and any errors (angle difference, ratio difference) of two sets of actual current transformers under any load.
5. Detect the transformation ratio of known current transformers and measure the transformation ratio of unknown current transformers.
6. Measure and display the no-load error of non-standard points of voltage transformers.
7.320 * 240 large screen LCD display, fully Chinese interface. Easy wiring and operation, convenient to carry.
8. It can store and print various measurement data, making it convenient for users to query.
9. This instrument can be calibrated in accordance with the "JJG169-1993 Transformer Calibration Regulations".

Technical specifications of HWZ-D current transformer on-site error comprehensive tester
Variable ratio range: 5A/5A to 25000A/5A (5A/1A to 5000A/1A) ± 0.2%
Error measurement range: 5A/5A to 25000A/5A (5A/1A to 5000A/1A)
Limit error: ± 0.05%, as shown in the table below:

rated current	Difference (±%)	Angle difference (± ′)
1%	zero point one five	ten
5%	zero point one zero	six
20%	zero point zero eight	four
100%	zero point zero five	two
120%	zero point zero five	two
200%	zero point zero five	two
stability	zero point zero three	two

Note: For low-voltage through type current transformers, the limit error is 1/4 of the corresponding error limit

DC resistance: 0.0-0.1 Ω± 3% 0.1-50 Ω± 1%
CT secondary load: 1 Ω -25 Ω± 2%
Verification: Voltage range: 0-100V (with a dial gauge error of 0.5%)
Differential ratio: 0.001% -3% (100V)
Angle difference: 0.00 ′ -50 ′ (100V)
Error: DX=± (1% × X+1% × Y ± 2 words)
DY=± (1% × X+1% × Y ± 2 words)
Admittance: 0.1mS-99.9mS
Error: DX=± (1% × X+1% × Y ± 2 words)
DY=± (1% × X+1% × Y ± 2 words)
Working conditions: AC 220V ± 10%/50Hz ± 2%
Environmental temperature: 0-40 ℃
Environmental humidity:<85% at 25 ℃
Whole machine weight: ≤ 5Kg
Whole machine volume: 37cm × 28cm × 16cm