MTL Instruments MA30 Operating Manual

WARNING:

IMPORTANT SAFETY INFORMATION

To avoid risk of shock or fi re, which can be caused by incorrect wiring or
regulation, whenever installing mains surge protection devices, the safety
procedures must be followed.

Suitably qualifi ed personnel should carry out all installation.

1. Always isolate supply before installing or removing any connections.

2. The maximum rating of fuse/circuit breakers must not exceed the lower of:
a. The maximum value specifi ed for the surge protection device.
b. The power supply short circuit current.
c. The maximum rating of equipment protected by the surge protection
device.

INSTALLATION

Examples: For an in-line surge protection device with maximum specifi ed
through or line current of 30A,

a. Connected to a 30A power supply - Protect with 30A maximum.
b. Connected to a 8.5A UPS or standby generator - Protect at 5A

(A, 1.7 is the usual safety margin of fuses).

c. Connected to equipment rated at 5A maximum - Protect at 5A maximum.

• Correct polarity is essential. Check both at SPD and source of supply.

• The supply voltage must be less than the maximum working voltage of
the SPD. Pay particular attention to UPS and standby generator regula­ tion and neutral earth bond.

NOTE: Ensure that surge protection devices are removed before performing
insulation or fl ash tests on equipment.

MAINTENANCE

The lifetime of the MA30 is dependent on the number of surges experienced;
however, the unit will typically provide maintenance-free protection over a
twenty year period.

In the event of a surge exceeding the device ratings, the unit is designed to
fail-safe, due to the secondary protection elements. The equipment, therefore,
remains protected.

INSTRUCTIONS/

USER MANUAL

MA30 DIN RAIL or

WALL MOUNT

RFI & SURGE

PROTECTION DEVICES

NOTE: The MA30 is designed to limit the voltage that can occur both
line-line and line-earth. Any system insulation test should be
carried out with the MA30 disconnected from the circuit.

801634 Rev - 11/12/04

For more information contact your local MTL rep:

www.mtlsurgetechnologies/support/distribution/index.htm

CONGRATULATIONS! YOU HAVE JUST PURCHASED THE BEST
SURGE PROTECTION IN THE INDUSTRY!

Adhering to these instructions guarantees maximum performance of this Pro­tection device.

The MA30 RFI & SURGE PROTECTION DEVICES (SPDs) are a range
of DIN Rail and wall mounting SPDs for mains power applications.

CONSTRUCTION

The casing of the MA30 has screw-clamp terminals for input and output con­nections. The maximum allowable wire cross section for the terminals is #10
AWG (5.2mm

CONNECTION

The MA30 may be installed in series with the load or, if the load current
exceeds 30A, it may be installed in parallel.

2)

INTRODUCTION

The MA30 protects electronic equipment from surges and Radio Frequency
Interference (RFI) on the mains power supply . The MA30 has a unique 3-stage
combination of protection elements providing fi ltering, surge protection and
ring suppression.

INSTALLATION

The MA30 simply clips on to a 35mm (EN50022, DIN46277-2) DIN rail, or
mounts to the wall with #10 hardware and provided bracket.

Series Connection:

Connect the incoming mains to one side of the MA30 device, and the pro­tected equipment to the other side.

Parallel Connection:

Connect the incoming mains supply or equipment power to one side of the
MA30 device. This will install the SPD in parallel with the supply and it will
not be subjected to any load current. Install 30A overcurrent protection (fuse
or circuit breaker) in the LINE wire.

The Live wire must be connected to the “L” terminal and the Neutral wire
must be connected to the “N” terminal of the MA30. If two core cable with­out an integral earth wire is being used, then for full protection, the earth “E”
terminal should be bonded to a suitable system earth point.

NOTE: A fuse or circuit breaker must be inserted in the mains input side of
the incoming supply. Rating will be according to the required load
current and apply to series connection only.

Remote Indication

A three position remote indication connector is provided. This will provide
indication of suppressor failure and/or power failure. The form C contacts are
rated 3A at 230Vac (250Vdc). The contacts may be connected to an energy
management/monitoring system or the optional MTL remote monitoring unit
(RMU).

WARNING

EXPLOSION HAZARD - DO NOT disconnect equipment
unless power has been switched off or the area is known to
be non-hazardous.