MTL Instruments ZoneDefender Curve Specifications

• Wide range of voltage applications

• UL 1449 Type 1 and Type 2

applications

• 200kA short circuit current rating

• LED status indication

• UL 1449 3rd Edition Listed

• 10 year product warranty

technical datasheet

ZoneDefender Curve

Surge protection for Type 1 or Type 2 applications and systems

The ZoneDefender Curve Series surge
suppressor is specifically designed for
applications that require a Type 1 or Type 2
SPD. Type 1 models are available that meet
UL96A Master Label Program requirements.
This device eliminates the need for additional
overcurrent protection providing substantial
cost savings. These compact and durable
devices offer cost effective, high capacity
protection along with application versatility,
features which make the Series the ultimate
surge protection solution.

ZoneDefender Curve units, with a 50kA
surge handling capability per phase, provide
protection between Line to Neutral, Line
to Ground/Earth and Line to Line. Utilizing
Metal Oxide Varistor (MOV) technology, the
ZoneDefender’s protection circuits are highly
reliable, dual-redundant varistor networks
ensuring your site is never unprotected. Fully
automatic in operation, the ZoneDefender
Curve reacts immediately, clamping voltage
surges without causing undue leakage
losses under normal operation. No operator
intervention is required, ZoneDefender Curve
resets automatically and is maintenance free.

Thermal fusing is incorporated into each
ZoneDefender Cur ve as an additional safety
feature. Short circuit protection is also
supplied, as standard, for added peace of
mind.

ZoneDefender Curve offers an LED
Status indication facility allowing each

varistor network to be continually monitored
and indicated by LEDs on the front panel of
the device.

The ZoneDefender Curve Series is UL
1449 Listed and boasts an unrivalled 10

year ‘no questions asked’ manufacturers
product warranty. These devices also exceed
the requirements of ANSI/IEEE C62.45 and
ANSI/IEEE C62.41.

901-170 Rev A- 170710

www.mtl-inst.com [e-mail]

SPECIFICATION

All figures typical at 77°F (25°C) unless otherwise stated

Maximum surge current

50kA 8/20

Leakage current

<5µA

Working voltage

See table

Maximum continuous operating voltage

125% x nominal

Ambient temperature limits

-40°F to 185°F (-40°C to +85°C)

Humidity

95% R-H non-condensing

LED indication

Red LED = failure

Installation

Nipple mount

Ordering information

See table

Model ZD13700* ZD13701* ZD13703* ZD13704 ZD13705 ZD13706 ZD13712*

Nominal Voltage 120/240 120/208 240 277/480 347/600 480 120

System Type Split phase 3 ph WYE 3 ph DELTA 3 ph WYE 3 ph WYE 3 ph DELTA 1 phase

Nominal Discharge
Current (In, kA)

Max. Discharge
Current (I

Max. Discharge
Current (I

Short circuit current
rating (SCCR, kA)

Voltage Protection
Level (VPR) L-N

Voltage Protection
Level (VPR) L-G

Voltage Protection
Level (VPR) L-L

UL 1449 Listing Type

Enclosure Type NEMA 2

max

imp

, kA)

, kA)

20 20 20 10 10 10 20

50 50 50 50 50 50 50

15 15 15 15 15 15 15

200 200 200 200 200 200 200

700 700 — 1200 1500 — 700

— — 1000 — — 1800 1200

1200 1200 1800 2000 2500 3000 —

UL Type 1

US/CN
Type 2

UL Type 1

* Meets UL96A Master Label Requirements

Figure 1 Dimensions

Figure 2 Side dimensions

The give n data is only inten ded as a product de scription an d should not be reg arded as a lega l warranty of pro perties
or guara ntee. In the i nterest of f urthe r technic al develo pments, we r eser ve the right to m ake desig n change s.

EUROPE (EM EA): [phone] THE AMER ICAS: [phone] ASIA-PACIF IC: [phone]

[e-mail] [e-mail] [e-mail] 901-170 Rev A - 170710