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Merrill Lightning Arrestors - 120V or 240V

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MSRP $74.00

Sale Price $37.00

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SKU#

LAHD550

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LAHD550

Merrill Lightning Arrestors - 120V/240V Protection

Manufacturer: Merrill

Model #: LAHD550

Shipping Weight: 1 lb

(MOV) Varistors Used for Positive Discharge of High Voltage Surges
120 / 240 Volt Installations
For Surges of 500 + Volts - High Voltage Directed to Ground Wire
Heavy-Duty Models Have Threads and Nut to Attach to Electrical Panel
Application: Lightning Arrestor Can Be Used with a Variety of Enclosed Motor Controls.

Checking Your Lightning Arrestor

Check a Lightning Arrestor with an ohmmeter

Lightning arrestors have a unique feature unlike other secondary lightning arrestors in that they can be checked with a conventional ohmmeter.

With arrestor removed from circuit:

Set selector knob on ohmmeter to RX100K.
Connect both black "lightning arrestor" leads to one ohmmeter lead.
Connect white "lightning arrestor" lead to the other ohmmeter lead.
Resistance should read infinity (00). If a resistance reading other than infinity (00) is attained, the "lightning arrestor" should be replaced.

Frequently Asked Questions

What voltages are compatible with the Merrill Lightning Arrestor?: The Merrill Lightning Arrestor is compatible with both 120V and 240V systems.
Can the lightning arrestor withstand a direct lightning strike?: No, the arrestor cannot withstand a direct lightning strike or unusually high voltage surges.
Where should the lightning arrestor be installed for optimal protection?: For the best water system protection, install the arrestor at the pressure switch location.
Who should install the Merrill Lightning Arrestor?: A qualified electrician or electrical service professional should perform the installation.
How can I check if the lightning arrestor is functioning properly?: You can check it with an ohmmeter by following specific steps to ensure it reads infinity (00).
What types of motor controls can the arrestor be used with?: It can be used with a variety of enclosed motor controls, including well pump controls.
What happens to surges of 500 volts or more?: Surges of 500 volts or more are directed to the ground by the lightning arrestor.

For more information, please refer to the Merrill Lightning Arrestors Instructions.

Visit our website: Merrill Manufacturing

Overview

Merrill Lightning Arrestors are designed for use with 120 volt or 240 volt power to help protect motors and controls from voltage surges caused by lightning, switching loads, or power line interferences. Heavy-duty models include threads and a nut for attachment to an electrical panel or enclosed motor controls, including well pump controls. Surges of 500 volts or more are directed to ground, but no arrestor can withstand a direct lightning strike or unusually high voltage surge.

Specifications

More Information
Source	https://merrillmfg.com
Model #	LAHD550
Manufacturer	Merrill
Shipping Weight	1

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Product Literature

MERRILL Lightning Arrestors Instructions

(Size: 0.01 MB)

FAQs

What voltage systems is this lightning arrestor designed for?

It is designed for use with 120 volt or 240 volt power.

What does this lightning arrestor help protect?

It is designed to protect motors and controls from voltage surges caused by lightning, switching loads, or power line interferences.

What happens to surges of 500 volts or more?

The arrestor directs surges of 500 volts or more to ground.

Can this arrestor withstand a direct lightning strike?

No. No arrestor can withstand a direct lightning strike or a surge of unusually high voltage.

Where can this arrestor be used?

It can be used with a variety of enclosed motor controls, including well pump controls for 2-wire or 3-wire motors.

Where is the preferred location if only one arrestor is used?

The pressure switch location offers the best water system protection if only one lightning arrestor is used.

How can this arrestor be checked?

With the arrestor removed from the circuit, it can be checked using a conventional ohmmeter.

What reading indicates proper condition during an ohmmeter check?

The resistance should read infinity (00). If it reads anything else, the arrestor should be replaced.

Installation Tips

Installation Brief

This lightning arrestor is installed on compatible 120V or 240V motor control equipment to help direct voltage surges to ground.

Confirm the system uses 120 volt or 240 volt power and identify the intended motor control location.
Mount the heavy-duty arrestor to the electrical panel or enclosed motor control using its threads and nut.
If only one arrestor is being used on a well pump control system, place it at the pressure switch location for best water system protection.
After installation, verify the unit is properly connected and grounded in accordance with local electrical codes.