A COMPANY OF MARECHAL ELECTRIC
MELTRIC Corporation / 4765 W. Oakwood Park Drive Franklin, WI 53132
Tel. : 800 433 7642 / Fax : 414 433 2701 / e-mail : mail
@
meltric.com
A manufacturer of products using Marechal technology
meltric
.com
GENERAL
The SPeX is a single-pole plug and receptacle for use
in explosive atmospheres and conforms to the relevant
international and European standards, particularly the
ATEx Directive 2014/34/UE. SPeX can be used in
zones 1 and 2 (gas) and 21 and 22 (dust).
In order to guarantee a connection and disconnection
in complete safety, the SPeX receptacle is fitted with
an electromechanical device ( ring) for electrical
interlocking with a contactor (breaker) and an integral
pilot control circuit.
Receptacle contacts are protected against standard
test finger (IP2x/IPxxB) according to IEC/EN 60529
standard.
There are inherent dangers
associated with electrical pro-
ducts. Failure to follow safety precautions can re-
sult in serious injury or death. These instructions
must be followed to ensure the safe and proper
installation, operation and maintenance of the
MELTRIC devices. Before installation, disconnect all
sources of power to the circuit to eliminate the risk
of electrical shock. This product must be installed
with an electrical interlock that prevents connection or
disconnection in a loaded condition.
RATINGS
SPeX devices are provided with optional auxiliary
contacts that make after and break before the phase
contacts. The ratings for auxiliary contacts are shown
in Table 1.
INSTALLATION
SPeX must be installed by a qualified person in
accordance with all applicable local and national
electric codes. Be sure power is off before starting.
The supply of the pilot circuit must be protected
against transient over-voltages of 4 kV by means of an
appropriate isolating device. Follow the requirements
set forth by the ATEx classification. DO NOT ATTEMPT
TO TURN THE RING TOWARDS ‘‘1’’ WHEN THE
PLUG IS NOT ENGAGED.
Electrical interlocking with a contactor is mandatory.
Assembly
Insert cable through the cable gland and the handle or
through the inclined sleeve.
Wiring of the pilot wires
Use flexible conductors with a cross-sectional area
between 0.5 and 1 mm
2
(16 to 20 AWG).
NOTICE:
These conductors must be connected to the
wires of the microswitch by means of the isolated crimping
lugs supplied. Use an appropriate crimping tool.
A typical pilot circuit wiring diagram is shown below.
Wiring of the main conductor
Wire the main conductors within the amperage
and hazardous duty requirements of the ATEX
(T5) classification. The cross-section must be at least
that defined in the certificate or the CE Declaration of
Conformity, depending on the maximum current.
Strip the conductor by 1.8” (46 mm). Crimp the
threaded lug or the ferrule with the appropriate die
(NFC 20-130 or VDE 0220 or another). Hexagonal
crimping is recommended.
Tighten the threaded lug with a 24 mm wrench or
tighten the ferrule with a screw and a washer with a
19 mm wrench. Apply a torque ca. 95 ft-lbs (70 N.m).
While tightening the ferrule, prevent the contact from
rotating or transmitting torque to the device with a 24
mm wrench.
Assembly of the connector
Assemble the handles on the body of the products
with the supplied gaskets and screws and tighten the
cable gland with an appropriate tool. To achieve the
IP65/IP66 of an interlocked connector, use a cable that
incorporates the two pilot wires that are required for the
interlock, or use an ATEX cable gland bushing that allows
the passage of the main cable and the two pilot cables.
The silicone ring must be assembled on the receptacle
ring.
Assembly of the metal inclined sleeve.
Maintain air and creepage distances when assembling
the appliance inlet or the receptacle onto the metal
inclined sleeve, according to the operating voltage of
the main and auxiliary circuit and the degree of pollution.
The metal inclined sleeve must be grounded
to Earth.
Assembly of the plug/inlet cap
Place the lug located at the tip of the wire under one
of the mounting screws on the inlet side, or under the
screw provided under the receptacle side.
Color-coded rings
In order to achieve watertightness, do not forget the
color-coded ring at the rear of the inlet or receptacle.
The color-coded rings allows visual identification of
the pole depending on the color code of each country.
Place the color coded gasket between the inlet or
receptacle and its rear accessory or panel.
Isolating ring
When assembling the SPeX on a metallic support
(enclosure, panel, etc.), the isolating ring must be
positioned as above. Be sure to use the black flat
gasket, which guarantees the watertightness, between
the isolating ring and the accessory.
Receptacles, plugs, connectors and inlets are protected
against dust and water ingress by means of caps,
which must be re-assembled after use.
To achieve IP65/IP66, the receptacle or connector cap
must be assembled with its slot facing the socket-outlet
protruding finger.
OPERATION
To ensure safe and reliable operation, MELTRIC
plugs and receptacles must be used in accordance
with their assigned ratings.
They can only be used in conjunction with mating
receptacles or plugs manufactured by MELTRIC or
another licensed producer of products bearing the
TM
technology trademark.
Color-coded ring
Color-coded ring
Flat gasket
Isolating ring
L1
L2
L3
N
L1
L2
L3
N
P1
P2
L1
L2
L3
N
L1
L2
L3
N
P1
P2
Max
Min
SPeX 750 MCM
2/0
12-14 AWG
Table 2 - Wiring Terminal Capacity
Main Contacts
Aux. Contacts
Table 1 - Auxiliary Contact Ratings
Device 120VAC
240VAC 480VAC 600VAC
SPeX
–
6A (220 max)*
–
–
* Rating is not UL or CSA listed.
SPeX
OPERATING INSTRUCTIONS
INSSPEX E
WARNING
DANGER
CAUTION
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AVISO
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AVISO
ENGLISH OPERATING INSTRUCTIONS
©2020 MELTRIC Corporation. All rights reserved.
