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Load Box

The LB-5 Load Box helps to prevent the damaging effects of ferroresonance found on lightly or unloaded 3-phase power systems.  This situation typically occurs on medium voltage distribution transformers and power cables during single phase switching.  As the electric power industry moves towards more efficient transformer design, this condition is becoming more common.  If such conditions exist, overvoltage can lead to the breakdown of insulation resulting in damage to the transformer, lightning arresters and other equipment.  When using the LB-5 to connect and apply a resistive load on the transformer secondaries, damage to distribution equipment due to ferroresonance can be prevented.

Load Box model LB-5-1 includes an additional switch to disconnect the center of this Y connected load from the ground lead. This is required for corner grounded delta transformer connections.

Load Box Features

·         Helps prevent ferroresonance during single phase switching

·         Portable, one person design

·         Dual voltage, auto voltage selection

·         Powered by transformer secondaries 120/277VAC

·         5,000 watt per phase loading

·         Resistive load up to 3 phases

·         40A fused disconnect switch

·         Blown fuse indicator lamp

·         Auto-ranging voltage input - no switching required

HD Electric Company is committed to ongoing review and improvement of its product lines, and thus reserves the right to modify product design and specifications without notice.

About HD Electric Company
關(guān)于美國HD

For over eighty years, HD Electric Company’s mission has been to design and manufacture products to help our customers manage and deliver electric power in a safe and efficient manner. We accomplish this mission by designing products and providing solutions with a passion for excellence and innovation. At the core of our success are the relationships we have established with our customers and the reputation we have earned.

Headquartered in the Chicago metropolitan area, HD Electric Company supports sales representatives worldwide, manages a product demonstration fleet and maintains global support for its vast array of industry-proven products. We are committed to serving our customers in the twenty-first century with the service, technology and products that continue to make us a success.

Electrical Test, Measurement & Safety Products
電力測(cè)試、測(cè)量及安全防護(hù)產(chǎn)品

HDE's state of the art test, measurement and safety products provide safe, accurate, and critical information about the electric power system and its associated equipment. All HDE products are built to "utility grade" standards and are designed to improve system reliability; expedite power restoration; and facilitate maintenance procedures safely in the field. HDE's products give you the confidence you need to ensure that electricity is flowing to your customers in a safe and efficient manner.

HD Electric Products
美國HD 產(chǎn)品列表

多功能數(shù)顯電壓表和核相儀
Digital Voltmeters and Phasing Sets

DDVM-40雙數(shù)顯電壓表
Dual Display Digital Voltmeter - DDVM-40

DDPM-40雙數(shù)顯相位電壓表
Dual Display Phasing Voltmeter - DDPM-40

DDVIP-40雙數(shù)顯電壓指示相位表
Dual Display Wireless Voltage Indicating Phaser - DDVIP-40

SVM-25單棒數(shù)字電壓表
Single Stick Digital Voltmeter - SVM-25

DVM-80UVM數(shù)字電壓表和套件
Universal Digital Voltmeter and Kit - DVM-80UVM

DigiVolt數(shù)字電壓表和調(diào)相器
Digital Voltmeter & Phasing Sets - DigiVolt Series

無線核相儀
Wireless Phasers

TAG-5000無線核相儀
Wireless Phasing - TAG-5000

地下電纜故障測(cè)試儀
Underground Cable Fault Tester

UCT-8地下電纜故障測(cè)試儀
Underground Cable Fault Tester - UCT-8

數(shù)顯電壓表
Digital Voltage Indicators

DVI-100數(shù)顯電壓表
Digital Voltage Indicator - DVI-100

DVI-500數(shù)顯電壓表
Digital Voltage Indicator - DVI-500
電壓探測(cè)儀
Voltage Detectors

FTVD-15電壓探測(cè)儀
Voltage Detector - FireFly Fuse Tool Voltage Detector

TAG-200 TAG-330電壓探測(cè)儀
Voltage Detector - TAG Series
個(gè)人高壓防護(hù)報(bào)警器
Personal Voltage Detectors

V-Watch個(gè)人高壓防護(hù)報(bào)警器
Next Gen Personal Voltage Detector - V-Watch
工作區(qū)域電場(chǎng)警示器
Work Area Voltage Detection

Watchman工作區(qū)域電場(chǎng)警示器
Work Area Voltage Detection - Watchman

絕緣子測(cè)試儀
Insulator Tester

IT-4絕緣子測(cè)試儀
Insulator Tester - IT-4

避雷器泄露電流測(cè)試儀
Arrester & Leakage Testers

AT-100避雷器泄露電流測(cè)試儀
Leakage / Arrester Tester - AT-100

HiSat避雷器泄露電流測(cè)試儀
Leakage / Arrester Tester - HiSat Series

高壓直流泄露電流測(cè)試儀
High Voltage DC Leakage Tester

PT-5000W直流泄露電流測(cè)試儀
DC Leakage Tester - PT-5000W

電容器測(cè)試儀
Capacitor Testers

Cap Check電容器測(cè)試儀
Capacitor Testers - Cap Check Series

變壓器測(cè)試儀
Transformer Testers

ClearTest新型變壓器測(cè)試儀
NEW Transformer Testers - ClearTest

TILT-II變壓器測(cè)試儀
Transformer Testers - TILT-II
變壓器電容器測(cè)試儀
Transformer & Capacitor Tester

Quick-Check變壓器電容器測(cè)試儀
Transformer & Capacitor Tester - Quick-Check
電壓數(shù)字式電流表
High Voltage Ammeters

HVA-2000數(shù)字式電壓電流表
HVA High Voltage Digital Ammeter

HALO數(shù)字式電壓電流表
High Voltage Digital Ammeter - HALO Series
PRX非接觸式驗(yàn)電器
Proximity Voltage Detector

PRX-500非接觸式驗(yàn)電器
Proximity Voltage Detector - PRX-500

PRX-69D非接觸式驗(yàn)電器
Proximity Voltage Detector - PRX-69D

PRX-4非接觸式驗(yàn)電器
Proximity Voltage Detector - PRX-4

電纜測(cè)高儀
Cable Distance Meters

CDM電纜測(cè)高儀
Cable Distance Meters - CDM Series

饋線電流清除試驗(yàn)裝置
Feeder Ammeter Clear Test

FACT饋線電流清除試驗(yàn)裝置
Feeder Ammeter Clear Test

負(fù)載箱
Load Box

LB-5負(fù)載箱
Load Box

繩索測(cè)試儀
Rope Tester

RT-200繩索測(cè)試儀
Rope Tester - RT-200