RST SURGE Series User manual

ELM0100A
All efforts have been made to ensure the accuracy and
completeness of the information contained in this document. RST
Instruments Ltd reserves the right to change the information at any
time and assumes no liability for its accuracy.
Copyright © 2019. RST Instruments Ltd. All rights reserved.
Document Number: ELM0100A
Release Date: October 2, 2019
SURGE Series
Lightning and Transient Protector
Installation Manual

SURGE Series Lightning and Transient Protector
Installation Manual
ELM0100A
Page i
REVISION HISTORY
Rev.
Revision History
Date
Prepared By
Approved By
A
Initial release.
2019-Oct-02
MP
CB

SURGE Series Lightning and Transient Protector
Installation Manual
ELM0100A
Page ii
TABLE OF CONTENTS
1 INTRODUCTION............................................................................................................1
1.1 Types of Surge Protectors.................................................................................2
2 SAFETY ......................................................................................................................2
3 INSTALLATION.............................................................................................................3
3.1 Pre-Installation..................................................................................................3
3.2 Tools.................................................................................................................4
3.3 Installation Procedure .......................................................................................4
4 GROUNDING................................................................................................................6
5 SERVICE AND REPAIR..................................................................................................7
SPECIFICATIONS ...........................................................................................8
LIST OF FIGURES
Figure 1-1 4N: 4-wire and shield stand-alone surge protector....................................................1
Figure 1-2 16N: 16-wire and shield stand-alone surge protector................................................2
Figure 3-1 Installation diagram...................................................................................................4
Figure 3-2 Loosening the cable gland........................................................................................5

SURGE Series Lightning and Transient Protector
Installation Manual
ELM0100A
Page 1
1 INTRODUCTION
Long, horizontal lengths of cable that run between instruments and loggers are
susceptible to transient electrical fields, which can be destructive to both sensors and data
loggers. RST’s SURGE Series lightning and transient protectors can be installed to divert
these transients to ground, protecting delicate instruments and valuable data.
FIGURE 1-1 4N: 4-WIRE AND SHIELD STAND-ALONE SURGE PROTECTOR

SURGE Series Lightning and Transient Protector
Installation Manual
ELM0100A
Page 2
FIGURE 1-2 16N: 16-WIRE AND SHIELD STAND-ALONE SURGE PROTECTOR
1.1 TYPES OF SURGE PROTECTORS
This manual outlines installation instructions for two types of surge protectors
manufactured by RST Instruments:
•A 4-wire and shield stand-alone transient protector in a NEMA-4X enclosure
(Figure 1-1), and
•A 16-wire and shield stand-alone transient protector in a NEMA-4X enclosure
(Figure 1-2).
Both models are designed to be installed directly on the cable, with the sensor or
instrument wired to the “Protected Side” of the surge protector (see Figure 3-1 for an
installation illustration).
2 SAFETY
Normal safety precautions should be followed and proper personal protective equipment
(PPE) should be worn when working in the field with this equipment, including safety
glasses and high-visibility clothing.
Care should be taken to ensure the inside of the NEMA-4X enclosure and the seal remain
dry and free from dust, dirt, and moisture.

SURGE Series Lightning and Transient Protector
Installation Manual
ELM0100A
Page 3
3 INSTALLATION
3.1 PRE-INSTALLATION
Before installation, it is important to consider the location where the unit will be installed:
•It should be placed as close as possible to, but not directly on top of, the
instrument.
•Although the enclosure is weatherproof, it should not be submerged and should be
placed slightly above the ground.
Figure 3-1 illustrates a typical installation. Please note that site-specific conditions may
require adaptations. Contact RST with any questions or concerns.
WARNING: USED WHEN AN OPERATING PROCEDURE OR PRACTICE,IF NOT CORRECTLY
FOLLOWED,COULD RESULT IN PERSONAL INJURY OR LOSS OF LIFE.
CAUTION: USED WHEN AN OPERATING PROCEDURE OR PRACTICE,IF NOT STRICTLY
OBSERVED,COULD RESULT IN DAMAGE TO OR DESTRUCTION OF EQUIPMENT.
NOTE: USED TO HIGHLIGHT SPECIFIC NON-SAFETY RELATED INFORMATION.

SURGE Series Lightning and Transient Protector
Installation Manual
ELM0100A
Page 4
FIGURE 3-1 INSTALLATION DIAGRAM
3.2 TOOLS
The following tools are recommended to facilitate installation of the surge protectors:
•Two 20-mm open or small crescent wrenches,
•Philips # 2 screwdriver,
•Flat-head 2.5 mm screwdriver,
•Wire strippers, and
•Utility knife.
3.3 INSTALLATION PROCEDURE
The following instructions outline the steps for successfully installing a surge protector.
Though the instructions feature the SURGE 4N: 4-Wire & Shield model, the same
procedure may be used to install the SURGE 16N: 16-Wire & Shield model.
1Loosen the cable glands using two 20 mm wrenches. For each gland, hold the bolt in
place with one wrench and loosen the cap with the other wrench. Refer to Figure 3-2
for correct wrench placement.

SURGE Series Lightning and Transient Protector
Installation Manual
ELM0100A
Page 5
FIGURE 3-2 LOOSENING THE CABLE GLAND
2Remove the black cable plug from the cable gland.
3Loosen the 4 Phillips screws on the top of the NEMA-4X enclosure. Lift the cover off.
4Insert the cables with stripped wire ends through the cable glands and into the
enclosure. Ensure the cable sheathes are inside the enclosure.
5Loosen the screws on the terminal with a small flat-head screwdriver.
6Wire the leads to the terminal. Table 3-1 provides a recommended wiring scheme. It
is important to note that, aside from the shield, the order of the wires does not matter.
However, it is critical that the order of the wires is maintained on both sides of the
surge protector (for example, if the red wire is connected to 1 on the line side of the
surge protector, the red wire MUST be connected to 1 on the protected side).
TABLE 3-1 RECOMMENDED WIRING SCHEME
Protected Side
Line Side
Red
1
1
Red
Black
2
2
Black
Green
3
3
Green
White
4
4
White
Shield
SH
SH
Shield
CAUTION: ENSURE THE ENTIRE NUT BODY DOES NOT LOOSEN.LOOSEN ONLY THE
GLAND.

SURGE Series Lightning and Transient Protector
Installation Manual
ELM0100A
Page 6
7Tighten the screws on the terminal to secure the leads.
8Push the cable into the gland slightly before tightening to provide a bit of slack on the
wires.
9Tighten the cable glands using the same wrench placement as Step 1. Gently tug on
the cable after each half turn to inspect cable mobility. Perform a final half turn once
the cable is immobile.
10 Replace the cover of the NEMA-4X enclosure. Replace and tighten the 4 Phillips
screws on the top.
11 Proceed with grounding the unit.
4 GROUNDING
Grounding the surge protectors is extremely important and must be done correctly to
ensure instruments are protected from transient events. A grounding cable comes pre-
installed on the surge protectors but will need to be secured to a grounding rod, which has
been planted into the ground. The following instructions detail the steps necessary to
correctly ground stand-alone units.
1 Select a location to install the grounding rod.
2 Plant the grounding rod firmly into the ground.
3 Strip the free end of the grounding cable.
4 Run the grounding cable from the surge protector’s enclosure to the grounding rod.
NOTE: THE SURGE 16N CAN PROTECT UP TO FOUR SEPARATE INSTRUMENTS.TO WIRE
MORE THAN ONE INSTRUMENT TO A SINGLE SURGE 16N UNIT,SIMPLY REPEAT THE
RECOMMENDED WIRING SCHEME (TABLE 3-1) IN TERMINALS 5–8, 9–12, AND 13 –16
UNTIL ALL UNITS HAVE BEEN WIRED TO THE TERMINALS.
NOTE: SELECT A LOCATION WITH RELATIVELY SOFT EARTH THAT IS FREE FROM ROCKS
AND DEBRIS.
CAUTION: ENSURE THAT THE INSTRUMENT IS WIRED TO THE “PROTECTED SIDE”.
FAILURE TO DO SO MAY RESULT IN LOSS OF EQUIPMENT DURING A TRANSIENT EVENT.
CAUTION: THE ORDER OF THE WIRES MUST BE MAINTAINED ON BOTH SIDES OF THE
TERMINAL TO PROTECT BOTH THE INSTRUMENTS AND DATA LOGGERS.FAILURE TO DO
SO MAY RESULT IN LOSS OF EQUIPMENT DURING A TRANSIENT EVENT.

SURGE Series Lightning and Transient Protector
Installation Manual
ELM0100A
Page 7
5 Loosen the bolt on the grounding rod’s clamp.
6 Place the stripped end of the grounding wire underneath the clamp.
7 Secure the cable to the grounding rod with the clamp by tightening the bolt.
Please contact RST directly with any questions pertaining to the installation of the
grounding stake.
5 SERVICE AND REPAIR
The product contains no user-serviceable parts. Contact RST for product service or repair
not covered in this manual.
CAUTION: ENSURE THAT THE GROUNDING CABLE HAS SUFFICIENT CONTACT WITH THE
GROUNDING ROD.

SURGE Series Lightning and Transient Protector
Installation Manual
ELM0100A
Page 8
SPECIFICATIONS
Item
Description
Conductors protected
SURGE 4N: 4+1 shield
SURGE 16N: 16+4 Shield
Maximum transient current per line (1
event, 8/20 μs)
20,000 Amps
Minimum conduction threshold voltage
58 Volts
Peak pass-through voltage (common or
normal mode)
77 Volts
Output clamp voltage
4 Volts
Series resistance per line
1.6 Ohms
Maximum leakage current
5 Microamps
Hold current
150 Milliamps
Maximum AC current (1-line cycle)
30 Amps RMS
Maximum continuous current
2 Amps