MTL Instruments ZoneSentinel Operating Manual

MAINTENANCE

At intervals not exceeding two months, check:

1. Status indication lights

2. Conditions of connecting cables and terminals

Module Replacement

WARNING: Before opening the access panel, ensure

that the AC supply has been disconnected.

Unplug the remote contact connector at the top of the module.
Remove the mounting nuts at the top and bottom of the module.
The protection module can now be removed.

WARNING: Replace the defective module with a module

having the same model numbers.

ZONESENTINEL® SERIES

AC Panel Transient Voltage Surge Suppressors

Installation of the replacement module is the reverse of the above
procedure. Final step, check that all cable connections are secure
and nuts are tightened. Do not overtighten.

NOTE: No customer serviceable parts inside. Opening
module WILL void Warranty

For more information please contact your local MTL offi ce

or visit our web site at www.mtlsurge.com

The Americas: [phone]
UK: [phone]
Singapore: [phone]

801481 Rev E 07/14/09

The Netherlands: [phone]
Italy: [phone]
Australia: [phone]
India: [phone]

Installation

Instructions

& User Manual

CONNECTING LEADS

Connect the suppressor as shown in the installation diagram.
Refer to page 5 for recommended cable dressing. Connect the
terminals within the suppressor to the load side of 30A breakers
within the panel.

RECOMMENDED WIRE GAUGE

Minimum of 10 AWG
Maximum of 4 AWG ( for ease of dressing)

LENGTH OF CONNECTING LEADS

The longer the connecting leads between the ZoneSentinel® and
power panel, the higher the residual transient
voltage.

RECOMMENDED MAXIMUM: 19” (500mm)
IDEALLY: 10” (250mm)

RECOMMENDED CABLE DRESSING

Each 10” (250mm) increase in cable length; increases clamping
voltage by 25V per 1000A surge current discharged.

• BIND THE PHASE NEUTRAL AND GROUND
CONDUCTORS TIGHTLY, OVER THE ENTIRE RUN
FROM THE SUPPRESSOR TO THE SERVICE PANEL.

• ALWAYS USE THE SHORTEST LENGTH OF
CONNECTING CABLE POSSIBLE.

4

DIMENSIONS

5