ED-201 Type Mining Cable Transition Resistance Tester

Product Description

The ED-201 type mining cable transition resistance tester is developed to meet the technical requirements of the national standard GB1170-74.

The ED-201 Mining Cable Transition Resistance Tester is suitable for cable factories, mines, power transmission, scientific research institutions, etc.

The ED-201 Type Mining Cable Transition Resistance Tester is a specialized instrument for detecting transition resistance in mining cables.

The ED-201 Type Mining Cable Transition Resistance Tester primarily consists of two parts: the electrical testing section and the mechanical transmission mechanism.

ED-201 Mining Cable Transition Resistance Tester Electrical Test Section: Comprises a DC digital voltmeter and a DC constant current source; measurement results are displayed on an LED digital screen. Test current features adjustable output from 0 to 5mA, displayed on the LED digital screen. Mechanical Transmission Mechanism Section: Utilizes manual operation clamps and an electric sampler for sampling.

The ED-201 type mining cable transition resistance tester boasts high measurement accuracy, excellent stability, compact structure, and ease of use, fully complying with the national standard GB1178-74.

ED-201 Type Mining Cable Transition Resistance Tester Working Principle:

When the probe penetrates through the mineral cable's insulating layer, the main conductor's semiconductive shielding layer, and the main conductor's insulating layer to the main conductor's conductor, it contacts the semiconductive shielding layer between the main conductor and the ground wire. By passing a constant direct current through the main conductor and the ground wire via the test electrode, and measuring the potential difference at the test electrode, the transition resistance of the mineral cable's semiconductive shielding layer can be measured.

        R=U/L (Ω)

In the formula: U — Voltage meter reading value, V

I —— Ammeter reading, A

In accordance with the National Standard GB1170-74, the test current should not exceed 5mA. From the above formula, it can be observed that there are two specific testing methods available when using the ED-201 mining cable transition resistance tester:

At an applied current of I=5mA, due to the instrument's inherent data processing and conversion functionality, the digital display reading directly corresponds to the shunt resistance value.

(2) When the current is adjustable from 0 to 5mA, the digital display shows both the voltage reading and the current value used. Calculate the quotient to determine the (U/I) transition resistance value.

Product Features

The ED-201 Type Mining Cable Transition Resistance Tester is designed to meet the technical requirements of national standards GB12972 and MT-818, serving as a specialized instrument for detecting transition resistance in mining cables. In 1985, it was evaluated by over 20 major cable industry participants, including the Shanghai Cable Research Institute, Shanghai Cable Factory, Shenyang Cable Factory, and others, and passed the national technical appraisal.
 

The ED-201 Mining Cable Transition Resistance Tester has been applied in dozens of cable factories and has received widespread popularity and positive feedback.
 

The ED-201 Mining Cable Transition Resistance Tester employs an electric sampler, automatically displaying the transition resistance values and corresponding phases in the instrument with symbols and numbers. The instrument offers convenient sampling, reliable testing, significantly reducing labor, enhancing test accuracy, and improving efficiency. Our factory made significant improvements to the circuitry and fixtures of the original 85 model instrument in 1990, leading to a substantial enhancement in the instrument's performance.
 

The ED-201 type mining cable transition resistance tester is portable, consisting mainly of two parts: the electrical testing section and the mechanical transmission mechanism. Electrical testing section: Composed of a DC digital voltmeter and a DC constant current source. Measurement results are displayed using an LED digital display. The test current has a adjustable output of 0—5mA, also displayed digitally via an LED. Mechanical transmission mechanism section: Utilizes manual operation clamps and an electric sampler for sampling.
 

The ED-201 Mining Cable Transition Resistance Tester boasts high measurement accuracy, excellent stability, compact structure, and ease of use, fully meeting the national standard GB1178 requirements.
 

The ED-201 Type Mining Cable Transition Resistance Tester is suitable for cable factories, mines, power transmission, scientific research institutions, etc. It is an essential instrument for the quality inspection of mining cable products.

Technical Specifications

Measurement Range: 1 Ω -- 10 ΚΩ

2. Range: 2ΚΩ and 10ΚΩ two stages.

Voltage Range: 2V; 20V; 200V.

4. Test Current: 0-5mA adjustable.

5. Measurement Accuracy: ±0.5% reading ±2 digits.

6. Display: 3 1/2-digit LED digital display for 0-1999 units, decimal point and overload are automatically displayed.

7. Automatically identify the phase of the tested cable, represented by A, B, C.

Test Bench
(1) Sample length L ≤ 500mm.

(2) Sample Outer Diameter: Φ20 - Φ100mm.

(3) Probe Diameter ≤ φ1.5mm.

(4) Manually operate the electric sampler to determine if the core wire position is correct and identify its corresponding phase line.

9. Power: 220V ± 10%

Power: 70W