Product Introduction

MOEORW-W6860 herringbone ladder spread limiting strength testing machine is developed in compliance with DL/T 2157-2020, DL/T976-2017, DL/T1476-2023 and other power industry standards. It is specially designed for static load preventive test on the spread limiting structure of electric power herringbone ladders to judge whether the ladder meets safety test standards.

The equipment adopts an integrated all-in-one structure, with built-in control operation box to save laboratory space. It uses servo motor pulling steel wire rope for horizontal spreading loading, and electric lifting support for ladder fixing. The whole system consists of static load test bench and main control console, matched with complete test fixtures. The built-in Linux core control software runs on Windows 10 touch screen terminal, supports Ethernet data interconnection, automatic test operation, real-time force curve display, result judgment and thermal printing of test reports, which realizes full-automatic standardized preventive test of power safety ladders.

Product Parameter (specification)

Ladder Spread Test Technical Parameters

Item	Specification
Overall Dimension	2600mm(L) × 800mm(W) × 2200mm(H)
Loading Mode	Servo motor horizontal pushing loading
Horizontal Pushing Width Range	300 ~ 1250 mm
Horizontal Pushing Speed	0 ~ 1600 mm/min, adjustable
Horizontal Pushing Stroke	1250 mm
Lifting Stroke	1850 mm
Lifting Height Range	350 ~ 1800 mm
Lifting Speed	0 ~ 1600 mm/min
Max Test Force	5000 N
Measuring Range	1% ~ 100% F.S
Overload Bearing Capacity	110% F.S
Force Accuracy	＜±1%
Force Resolution	0.5 N
Safety Protection for Spreading	Brake, mechanical limit, photoelectric limit
Safety Guard	160° surrounding protective mesh

Control & Electrical Parameters

Item	Specification
Operating System	Windows 10 Professional + Linux core control program
Human-Machine Interface	15.6-inch LCD touch screen
Printing Device	58mm thermal printer
External Communication	Ethernet port for data docking
Power Supply	AC 220V, 50Hz; Rated Power 750W
Voltage Tolerance	-20% ~ +15%
Frequency Tolerance	-10% ~ +10%
Power Waveform	Sine wave, THD ≤5%

Working Environment

Ambient Temperature	0 ~ 50℃
Relative Humidity	＜85%
Atmospheric Pressure	0.84 ~ 1.09 standard atmospheric pressure
Max Altitude	＜1200m

Standard Supporting Accessories

Step fixture	1 set
Connecting chain	1 piece
Steel wire rope guide rail & fixed pulley	1 set
Test backing plate	2 pcs (750×300×40mm)

Product feature

1.Integrated Compact Structure Built-in operation control box, integrated frame design, electric ladder support bracket, light overall weight, effectively saving laboratory layout space.
2.High-precision Servo Loading System Servo motor drives steel wire rope to complete horizontal spread loading; adjustable speed and stroke, force resolution up to 0.5N, force measurement accuracy less than ±1%, stable and uniform loading.
3.Multi-layer Safety Protection Design Equipped with holding brake, mechanical hard limit, photoelectric induction limit and 160° full-surround protective mesh; abnormal force or displacement triggers automatic emergency stop with warning light reminder to avoid test safety accidents.
4.Intelligent Touch Control Software 15.6-inch touch screen operation interface, simple visual operation; built-in standard test parameter templates for herringbone ladder spread limit, automatically matching standard tension and holding time; support custom force value for special tests.
5.Complete Data Management Function Real-time display of force-time curve, automatic judgment of pass/fail after test; support thermal printing of test reports, historical data storage, query, page turning and deletion, compatible with upper-level data center via Ethernet.
6.Low Noise & High Automation Electric lifting and horizontal pushing without manual adjustment; low operation noise during long-term test; support automatic cycle test and manual independent lifting/pushing operation for debugging.
7.Multi-standard Compliance Fully meets DL/T power industry test standards and GB electrical equipment safety standards, specially calibrated for power safety tool preventive test.

Product Application

Core Application Scenario
Preventive static load test on the spread limiting connecting structure of insulated herringbone ladders and metal herringbone ladders used in power live-line operation, to verify the tensile strength of ladder spread limiting device and eliminate hidden dangers of ladder opening failure during live operation.

Target Users
1.Power supply bureaus, power transmission & transformation maintenance workshops
2.Live-line operation tool testing centers of power grid companies
3.Third-party power safety tool inspection institutions
4.Manufacturers of insulated ladders and electric safety work tools

Supported Test Standards

DL/T 2157-2020 Test System for Live Working Tools
DL/T 976-2017 Preventive Test Code for Live Working Tools, Devices and Equipment
DL/T 1476-2023 Preventive Test Code for Electric Safety Tools
GB 4793.1-2007 General Safety Requirements for Measuring, Control and Laboratory Electrical Equipment

Standard Delivery Configuration

Main Machine Module
1.Main test frame with 160° safety protective mesh
2.Servo horizontal push loading drive assembly
3.Electric vertical lifting ladder support mechanism
4.15.6-inch touch screen integrated control cabinet
5.High-precision force sensor
6.58mm built-in thermal printer

Test Auxiliary Module
1.Step fixture assembly
2.Connecting steel chain
3.Steel wire rope guide rail and fixed pulley group
4.Two pieces of thickened test backing plates
5.Power cable, communication cable
6.Complete product operation manual

Software Function Module
1.User login authority module (default account: Admin, password: 123456)
2.Standard test parameter template module for herringbone ladder spread limit
3.Real-time force curve acquisition & display module
4.Automatic test execution & manual jog control module
5.Test result automatic judgment module
6.Historical data storage, query & printing module
7.Ethernet upper computer data docking module
8.System parameter configuration module