Page 564 - Din prodcuts 2020

5/120 ELECTRICAL INSTALL ATION SOLUTIONS FOR BUILDINGS 2CHC 420 001 C0201

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Protection and safety
Data & signal protection
OVR RTD Series

5
Combined Category D, C, B tested protector (to BS EN 61643) suitable for 3-wire
RTD systems to protect monitoring equipment. For use at boundaries up to LPZ
0 to protect against flashover (typically the service entrance location) through
to LPZ 3. Available as standard OVR RTD format, or compact OVR RTDQ and Slim
Line OVR SL RTD versions for installations where a high number of lines require
protection.

Features & benefits
• Protects all three wires on a 3-wire RTD system with • OVR RTD can be flat mounted on base or side
a single protector • OVR RTD and OVR RTDQ have colour coded terminals for
• Very low let-through voltage (enhanced protection to quick and easy installation check
IEC/BS EN 62305) between all lines - Full Mode protection • OVR SL RTD has ultra slim 7 mm width ideal for compact
• Full Mode design capable of handling partial lightning protection of large numbers of lines (e.g. process
currents as well as allowing continual operation of control installations)
protected equipment • OVR SL RTD includes two stage removable protection
• Repeated protection in lightning intense environments module with simple quick release mechanism
• Low in-line resistance minimizes reductions in signal allowing partial removal for easy line commissioning
strength and maintenance as well as full removal for
• Built-in DIN rail foot for simple mounting to top hat protection replacement
DIN rails
• Convenient earthing through DIN foot and/or earth For further information on RTD applications, see separate
terminal Application Note OVR AN001 (contact us for a copy).

Installation
Connect in series with the signal line either near where it point. Install protectors either within an existing
enters or leaves the building or close to the equipment being cabinet/cubicle or in a separate enclosure.
protected ensuring it is very close to the system’s earth star

Accessories OVR RTD installed in series OVR SL RTD installed in series
Replacement module for OVR SL RTD:
OVR SLRTD/M DIRTY CLEAN LINE CLEAN
CLEAN
LINE
Lightning Barrier
Standard module replacement
Nominal voltage 30V
OVR SLRTD/B 1 Current rating 750mA 1.0Ω 20kA 63V 3
Max working voltage, U c 36.7V
In-line resistance
Max surge current
Let-through voltage, U p
Base replacement Furse Wilford Road,
From To S Nottingham, S
NG2 1EB, UK
Combined Mounting/Earthing kits for OVR RTD: line Earth equipment 2 4
OVR CME 4 For up to 4 x OVR RTD
OVR CME 8 For up to 8 x OVR RTD
OVR CME 16 For up to 16 x OVR RTD OVR RTDQ installed in series (in-line)
OVR CME 32 For up to 32 x OVR RTD
From line To equipment
From line
To equipment
DIRTY CLEAN
Earth
If protectors cannot be incorporated within Earth
an existing panel or enclosure, OVR WBX
enclosures are available for up to 4, 8, 16 or 32
protectors and their associated OVR CME kit.
Weatherproof enclosure:
OVR WBX SLQ (OVR SLRTD and OVR RTD Q)
From To
line Earth equipment
NOTE: For 2-wire or 4-wire RTD applications, use one or two OVR 06D or OVR SL06 protectors respectively.