MTL Instruments SSP Specifications

Technical data

MTL surge protection

MTL SSP range

Surge protection against
sustained voltages
and AC faults

• Withstands AC fault crossover voltages

• Protects against attenuated surges

• Full voltage range 7/16/32/55/75/200

• Resets automatically

• ATEX and IECEx certified intrinsically

safe surge protection

• Extension of the IOP/SLP range

after removal of fault

July 2015
EPS 901-180 Rev 3

The self-healing surge protector (SSP) from Eaton adds AC
fault withstand capability and current limiting protection to our
traditional hybrid surge technology.

The single loop design is packaged in the well-known IOP/SLP
enclosure giving the customer a wider range of performance offering
when choosing this family of products. The product eliminates the most
common cause of SPD failure (continuous overvoltage/over current
conditions) while adding current limiting protection to the circuit.

The use of Surge Protection Devices on communication lines has
increased significantly over the last number of years. However, if the
communication lines are subjected to induced AC power or AC power­cross, the surge protector can pose possible safety hazards. In these
circumstances, the surge protector will respond and draw AC current.
The magnitude of current could be large enough to represent a fire risk
to the surge protector itself or the thin-gauge UTP (unshielded twisted
pair) wiring.

The SSP range incorporates circuitry to mitigate the hazards of
induced AC or AC power-cross up to 240Vrms. The SSP stops the
flow of current in milli seconds to prevent surge protector and wiring
damage. Once the AC power is removed, the SSP will cool down and
automatically begins normal operation again.

The SSP range takes our proven hybrid surge circuit and its
performance characteristics and adds another layer of protection.

Should the signal loop be subjected to surges which will not operate
the Gas Discharge Tube (GDT), yet operate the other surge protection
elements, the additional network will immediately protect these
elements by elevating to high resistance. This will stop current flowing
through the device and damaging the surge protection elements,
while protecting the loop equipment from being subjected to these
sustained over voltages.

The SSP range also provides overcurrent protection to the wiring
and the load. Should a sustained current of 500mA, or greater, be

present, the SSP will stop the current flow, thus providing additional
protection to the load and the wiring.

Measurement Technology Limited,
Great Marlings, Butterfield, Luton
Beds, LU2 8DL, UK.
Tel: + 44 (0)1582 723633 Fax: + 44 (0)1582 422283
E-mail: [e-mail]
www.mtl-inst.com

© 2015 MTL
All Rights Reserved
Publication No. EPS 901-180 Rev 3
July 2015

1

MTL SSP range

July 2015

SPECIFICATION

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

Maximum surge current
20kA (8/ 20µs waveform) per line

Leakage Current
see table below

Maximum rated load current
150 mA

Loop resistance
<20 ohms

Bandwidth
see table below

Attenuation
–3.0dB @ 25kHz

Response time
<1ns

Ambient temperature
Working & Storage

-40°C to +80°C (-40°F to +176°F)

Humidity
5 to 95% RH (non-condensing

Terminals

2.5mm

Electrical connections
Plug/ header screw terminal strip

Mounting
T-section DIN-rail (35 x 15mm rail

Weight
140g approx. (5oz)

Case flammability
UL94-V0

EMC compliance

BS EN 61326-1:2006

Electrical safety
See approvals table

2

(12 AWG )

Figure 1 Dimensions Figure 2 Connection details

SSP

Figure 3 Installation

TO ORDER SPECIFY - Order by module, as listed in the specification table below.

Model SSP07X SSP16X SSP32X SSP55X SSP75X SSP200X

Nominal voltage Un7Vdc 16Vdc 32Vdc 55Vdc 75Vdc 200Vdc

5Vac 11Vac 22Vac 38Vac 53Vac 140Vac

Rated voltage (MCOV) Uc7.7V 17V 36V 62V 90V 220V

Max leakage current µA 500 5 5 5 5 5

Residual voltage @ i

Voltage protection level @ 1kV/µs Up<12V <25V <45V <90V <115V <300V

Bandwidth fG25kHz 25kHz 25kHz 25kHz 25kHz 25kHz

Series resistance R 20Ω 20Ω 20Ω 20Ω 20Ω 20Ω

Special feature Sustained Over-voltage

sn

U

50 60 100 12 2 184 344

p

HAZARDOUS AREA APPROVALS

Country (Author ity) Standard No. Certificate/File Approved for Product

EC (ATEX) EN 60079-0:2012

Global (IECEx)

ATEX Directive

USA (FM) Class 3600 (2001), Class 3610 (2010),

Canada (FM)

2

EN 60079-11:2012

IEC 60079-0:2011
IEC 60079-11:2011

EN 60079-14:2009
EN 60079-15:2010

Class 3611 (2004), Class3810 (2005)

ANSI/ISA 60079-0 (2009)
ANSI/ISA 60079-11 (2011)
ANSI/ISA 61010.1 (2004)

C22. 2 No. 213 (20 08)
C22. 2 No. 157 (2006)
C22. 2 No 60 079 - 0 (2011)
C22. 2 No. 60 079 -11 (2011)
C22. 2 No. 1010.1 (2004)

Measurement Technology Limited,
Great Marlings, Butterfield, Luton
Beds, LU2 8DL, UK.
Tel: + 44 (0)1582 723633 Fax: + 44 (0)1582 422283
E-mail: [e-mail]
www.mtl-inst.com

© 2015 MTL
All Rights Reserved
Publication No. 901-180 Rev 3
July 2015

Baseefa13ATEX0023X Ex ia IIC T4 Ga SSP***X

IECEx BAS 13.0017X IEx ia IIC T4 Ga SSP***X

MTL13ATEX0756X Ex nA IIC T4 Gc SSP***X

30 48 513 Intrinsically Safe:

30 48 513C Intrinsically Safe:

EUROPE (EMEA):

[phone]
[e-mail]

THE AMERICAS:

[phone]
[e-mail]

ASIA-PACIFIC:

[phone]
[e-mail]

Class I, G roups A-D
Class I Zone 0, Group IIC
Class I Zone 0, Group IIB

Non-incendive:
Class I, D iv 2, Groups A- D

Class I, G roups A-D
Class I Zone 0, Group IIC
Class I Zone 0, Group IIB

Non-incendive:
Class I, D iv 2, Groups A- D

The given d ata is only intended as a p roduct
descrip tion and sho uld not be reg arded as a leg al
warrant y of properties or gu arantee. In th e interest
of further technical developments, we reserve the
right to make de sign changes.

SSP***X

SSP***X