ES-699 Rev U
Page 14 of 17
10
Notes for Intrinsically Safe Installation
10.1
HAZARDOUS LOCATION
Refer to the device label for the description of the environment in
which the device may be installed.
10.2
FIELD WIRING
Intrinsically Safe wiring must be made with grounded shielded cable or
installed in grounded metal conduit. The electrical circuit in the
hazardous area must be capable of withstanding an A.C. test voltage
of 500 volts R.M.S. to earth or frame of the apparatus for 1 minute.
Installation must be in accordance with Masoneilan guidelines. The
installation including the barrier earthing requirements must comply
with the installation requirements of the country of use.
Factory Mutual requirements (USA): ANSI/ISA RP12.6 (Installation of
Intrinsically Safe Systems for Hazardous (Classified) Locations) and
the National Electrical Code, ANSI/NFPA 70. Division 2 installations
must be installed per the National Electrical Code, ANSI/NFPA 70.
See also, note 4.
CSA requirements (Canada): Canadian Electrical Code Part 1.
Division 2 installations must be installed per the Canadian Electrical
Code Division 2 Wiring Methods. See also note 4.
ATEX requirements (EU): Intrinsically safe installations must be
installed per EN60079-10 and EN60079-14 as they apply to the
specific category.
10.3
SVI-II AP (+) and (-) 4-20 mA IN Terminals
These terminals power the SVI-II AP. The barrier is the Controller
Output Type, for example MTL 728.
Entity Parameters: Vmax= 30 Vdc; Imax=125 mA; Ci = 6.5 nF; Li =
1 uH; Pmax = 900 mW
10.4
SVI-II AP (+) and (-) 4-20mA OUT Terminals
These terminals provide a 4 to 20 mA signal related to valve position.
The 4 to 20 OUT terminals behave much like the terminals of a
transmitter so a Transmitter type barrier with 250 Ohm series
resistance (internal or external) is used for this connection. For
example, MTL 788 or 788R.
Use of the 4-20 OUT feature is certified to ATEX intrinsically safe
requirements and is approved for use in Zone 0. Use of the 4-20
mA OUT feature has not been certified by FM or CSA. The 4-20
mA OUT feature may not be used in an intrinsically safe installation
when FM or CSA intrinsically safe approval is required. The 4-20
mA OUT feature is certified by FM and CSA for use in a DIV 2 area
and in a DIV 1 area when the SVI2 is installed in accordance with
flameproof requirements.
86
GE Oil & Gas
ValVue SVI II AP Quick Start
Summary of Contents for SVI II AP-2
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