ERICO TDS-MOVTEC Surge Diverters User Manual

SURGE DIVERTERS

INSTALLATION INSTRUCTIONS

Includes MPM Movtec Protection
Module Instructions

www.erico.com

Handbook No:

Handbook No:

HB-HBCR-111

HB-HBCR-111

© Copyright

© Copyright

ISSUE: 3 April 2003

INSIDE FRONT COVER

(Blank)

CONTENTS

Page

1. Warnings ... ... ... ... ... ... ... ... ... ... ... 4

2. Introduction ... ... ... ... ... ... ... ... ... ... 5

3. Protection Concepts .. ... ... ... ... ... ... ... 7

4. Mounting and Cautions ... ... ... ... ... ... 9

5. Voltage Ratings .. ... ... ... ... ... ... ... ... 10

6. Protection Mode .. ... ... ... ... ... ... ... ... 13

7. Connection Method ... ... ... ... ... ... ... 15

8. RCD, ELCB ... ... ... ... ... ... ... ... ... ... 20

Page

9. Isolation and Fusing ... ... ... ... ... ... ... 20

10. Status Indication and Alarms

... ... ... 22

11. MPM, Movtec Protection Module ... ... 24

12. Maintenance and Testing .. ... ... ... ... 27

13. Extended Warranty ... ... ... ... ... ... ... 28

14. Six Point Plan ... ... ... ... ... ... ... ... 29

15. Use of Mimic Panels ... ... ... ... ... ... 30

PAGE 3

GLOBAL LIGHTNING TECHNOLOGIES

1. WARNINGS

• Prior to installation ensure that the
Movtec is of the correct voltage and
frequency, and is the type recommended for
the local power distribution, and for the
equipment being protected.

• Hazardous voltages may exist internally to
the units. The units should be installed
(and replaced) only by qualified personnel
in accordance with all relevant Electricity
Safety Standards.

• Do not power MPMs and three phase
connected Movtecs (Ph-N) without the
upstream neutral connected. Failure to do
so may damage the Movtecs and/or the
load.

• Where the MPMs/Movtecs are connected
to an earth, this must be a low impedance
earth (<10 Ω) for correct operation.

PAGE 4

• X1-X4 connections may be at phase voltages
dependant upon connection method.

• If connecting to the Movtec alarm outputs
do not exceed the maximum permissible
ratings as damage may occur.

• Movtecs must be installed in an
enclosure or panel, ensure this does not
cause their environmental ratings to be
exceeded.

• Do not “Megger” or “Flash Test” circuits
with Movtecs installed.

• The DINLINE Surge Counter (DSC) should
not be used in voltage sensing mode with
TDS-Movtecs. Voltage sensing mode is not
compatible with TDS-Movtecs.

• All instructions must be followed to ensure
correct and safe operation.

• Diagrams are illustrative only, and should
not be relied on in isolation.

DINLINE INSTALLATION INSTRUCTIONS

2. INTRODUCTION

Movtecs are designed to protect mains
powered equipment from the damaging effects
of lightning and transients. They are ideal for
point-of-entry shunt protection applications
where robustness and high surge ratings are
required.

The Movtec family is designed to suit many
distribution systems including TN-C, TN-S,
TN-C-S and TT. They can be selected for use
with distribution systems with nominal
voltages of 110/120V, 220/240V and 277Vrms
at frequencies of 50/60 Hz.

The TDS Technology (Transient
Discriminating Suppressor) units are
specifically designed for distribution systems
that may feature poor voltage regulation
where the actual supply voltage may exceed
the nominal ratings for extended periods.

This Installation Manual details the preferred
procedure for the installation of the family of
Critec Movtec™ Surge Diverters.

The Critec Movtec family includes:

• Critec Movtec, Single Mode, enhanced
MOV technology units eg. (MT275V-135K-A)

• Critec TDS-Movtec, Single Mode, TDS
technology unit featuring high over-voltage
withstand for added robustness (TDS-MT-

277)

• Critec TDS-Movtec, Three Mode, TDS
technology unit featuring high over-voltage
withstand for added robustness (TDS-MTU)

TDS-Movtec units are coloured blue for easy
identification, while enhanced MOV
technology units are coloured red.

In this manual, reference to “ Movtec” also
includes “TDS-Movtec”.

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GLOBAL LIGHTNING TECHNOLOGIES

This manual also details the installation of
the MPM (Movtec Protection Module). The
MPM is a supplied enclosure with three
Movtecs and a high energy neutral to earth
protection device for three phase protection.
The MPM is often used where Movtecs can not
be fitted in an existing switchboard and must
be mounted externally. Therefore the Movtec
installation instructions are also applicable to
the MPM. Section 11 gives details which are
specific to the MPM.

Two standard MPMs are available:

• Critec TDS-MPM, Single Mode, TDS
Technology unit (uses 3 x TDS-MT-277)

• Critec MPM-275V, Single Mode, Enhanced
MOV Technology unit (uses 3 x MT275V­135K-A)

PAGE 6

Alarm Contact
Terminals

T2
Terminal

X3-X4 For A-N/A/N-E
configeration option

Status
Indicator

X1-X2 For connection
to optional Mimic Panel
(Ref. Section 15)

SINGLE MODE

MOVTEC

T1
Terminal

DINLINE INSTALLATION INSTRUCTIONS

Alarm Contact
Terminals

Phase
Terminal

Status
Indicator

Earth Terminal

THREE MODE

MOVTEC

Neutral
Terminal

3. PROTECTION CONCEPTS

To optimise effectiveness of installed
protection a concept of “Unprotected” and
“Protected” wiring should be followed.Wiring
from the transient source to the Movtec
should be considered “Unprotected” and kept
remote from all other wiring (approximately
300mm) where possible. Wiring on the
equipment side of the Movtec should be
considered “Protected”.

The separation of “Protected” from
“Unprotected” wiring is recommended in order
to minimise the risk of transients conducted
on “Unprotected” wiring cross coupling on to
“Protected” circuits, thus compromising the
level of protection available from the Movtec.

PAGE 7

PAGE 8

GLOBAL LIGHTNING TECHNOLOGIES

Keep other cables and
equipment away
from this area.

Unprotected zone Protected zone

DINLINE INSTALLATION INSTRUCTIONS

4. MOUNTING & CAUTIONS

The performance of surge diverters can be
dramatically affected by the method of
connection (refer section 7). Where possible
select a mounting method that allows the
Movtec to be connected in the “Preferred
Connection Method”.

Failure of a Movtec under severe AC over­voltage, such as 11kV on 240V mains, can
result in the generation of significant heat.
Consideration should be given to ensure that
Movtecs are not installed in close proximity to
combustible materials.

Units must be installed in an enclosure or
panel to provide the appropriate degree of
electrical and environmental protection.

Only use enclosures that:

• Do not cause the Movtec temperature to
exceed 60 deg C

• Provide adequate electrical and safety
protection

• Prevent the ingress of moisture and water

• Allow Movtec Status Indication to be
inspected

PAGE 9

GLOBAL LIGHTNING TECHNOLOGIES

5 VOLTAGE RATINGS

The TDS (Transient Discriminating
Suppressor) technology has been specifically
developed to cater for abnormal over-voltage
conditions that may occur on sites with poor
voltage regulation, or due to wiring or
distribution faults. The TDS units feature an
extremely high over-voltage withstand to
eliminate heat build up that can occur with
standard technologies when the protection
devices start to clamp on the peak of each
abnormal mains cycle.

Traditional MOV technology (eg MT-275V/
135K/A) is not suitable in applications
where sustained over-voltage conditions
can be experienced.

PAGE 10

Examples of poorly regulated voltage
environments include:

• Smaller power generation supplies

• Sites with large earth currents

• Variable motor speed control circuits

• High harmonic voltage environments (non-

linear loads)

The TDS range of Movtecs with a higher
over-voltage withstand may be able to be
used in these environments following
advice.

Transient protection devices are usually rated
to protect against non-repetitive pulses from
such sources as direct or induced lightning
strikes. They are not designed to provide
protection against repeated cyclic anomalies.
Nor are they designed to provide protection