Railway grounding resistance tester

NegotiableUpdate on 05/06

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Nature of the Manufacturer: Producers

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Overview

The railway grounding resistance tester is a portable safety detection device designed specifically for railway systems, used to accurately measure the power frequency grounding resistance and conductivity of grounding devices such as rails, signal equipment, and traction power supply systems.

Product Details

The railway grounding resistance tester is a specialized instrument used to measure the grounding resistance values of various grounding devices in railway systems. It abandons the traditional manual hand cranked power generation method and uses medium to large-scale integrated circuits. It combines the three terminal and four terminal measurement methods into a new type of grounding resistance tester using DC/AC conversion technology.

The working principle is that the DC/AC converter inside the machine converts DC into AC low-frequency constant current, which forms a circuit through the auxiliary grounding electrode C and the measured object E. An AC voltage drop is generated on the measured object, which is amplified by the AC amplifier through the auxiliary grounding electrode P, and then detected and displayed on the meter head. With the help of a multiplier switch, three different limits can be obtained: 0-2 Ω, 0-20 Ω, and 0-200 Ω

The UHV-2571 Railway Grounding Resistance Tester is suitable for measuring the grounding resistance of various devices and low resistance conductor resistance values in departments such as power, postal and telecommunications, railways, communications, and mining; This table can also measure soil resistivity and ground voltage.

Technical parameters:

Terms of Use	ambient temperature	0℃～+45℃
Terms of Use	relative humidity	≤85%RH
Measurement range and constant current value (effective value)	resistor	0～2Ω(10mA)，2～20Ω(10mA)，20～200Ω(1mA)
	voltage	AC0～19.99V
Measurement accuracy and resolution	precision	0～0.2Ω≤±3%±1d
		0.2Ω～199.9Ω≤±1.5%±1d
		1～19.99V≤±3%±1d
	resolution	0.001Ω、0.01Ω、0.1Ω、0.01V
Measurement errors caused by auxiliary grounding resistance and ground voltage	Allow auxiliary grounding resistance	RC (between C1 and C2)
		0～2Ω，2～20Ω≤1kΩ
		20～200Ω≤2kΩ
		RP (between P1 and P2)<40k Ω, error ≤± 5%
	Allowable ground voltage (effective value of power frequency)	≤5V， Error ≤± 5%
Power supply and power consumption	power loss	≤2W
	direct current	8 × 1.5V (AA, R6) battery
	communication	220V/50Hz
Volume and weight	volume	220×200×105mm3
Volume and weight	weight	≤1.4kg

Note:

1. The appearance of the product is subject to the actual product. Technical parameters and models are subject to change without prior notice. If there is any act of theft or copying, legal responsibility will be pursued.

2. For more information on ultra-high voltage products, please enter the product center.

Product features

1. The structure of the grounding resistance measuring instrument adopts high-strength aluminum alloy as the casing, and the circuit adopts phase-locked loop synchronous tracking and detection method to prevent power frequency and radio frequency interference, and is equipped with a switch capacitor filter to make the instrument have good resistance

2. Using DC/AC conversion technology to convert DC into AC low-frequency constant current for measurement purposes

3. Allow the auxiliary grounding resistance to vary between 0-1.8k Ω; (RC), 0-40k Ω; (RP) without affecting the measurement results

4. The grounding resistance measuring instrument does not require manual adjustment of balance, with a 3 (1/2) LCD display. In addition to measuring grounding resistance, it can also measure low resistance conductor resistance, soil resistivity, and AC ground voltage. If the test circuit is not connected and the header displays "1", it indicates overflow, which is in line with conventional measurement habits

UHV-2571铁路接地电阻测试仪