Black Box IC109A-R2 Manual de instalación Pagina 48

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© 2007 Schneider Electric. All Rights Reserved.
1
63230-216-229-B1
Installation
Voltage Transformers
Function
Sepam™ connects to any standard voltage transformer with a rated secondary
voltage of 100 V to 240 V.
Square D offers a range of voltage transformers
b to measure phase-to-neutral voltages: VT’s with one insulated MV terminal
b to measure phase-to-phase voltages: VT’s with two insulated MV terminals
b with or without integrated protection fuses
Contact a Square D representative for more information.
Connection
Main Voltage Inputs
All Sepam™ Series 80 units have four main voltage inputs to measure four voltages
(three phase voltages and a residual voltage).
b The main voltage measurement VTs are connected to the Sepam™ connector
. (see page 20)
b Four transformers integrated in the Sepam™ base unit provide the required
impedance matching and isolation between the VTs and the Sepam™ input
circuits
Additional Voltage Inputs
Sepam™ B83 units also have four additional voltage inputs to measure the voltages
on a second set of bus.
b The additional voltage measurement VTs connect to the CCT640, which is
mounted on the Sepam™ port (see page 20).
b Four transformers in the CCT640 provide impedance matching and isolation
between the VTs and the Sepam™ input circuits (port ). (see page 20).
11111111
CCT640 Connector
Function
The CCT640 connects the four additional voltages available in Sepam™ B83. It
provides impedance matching and isolation between the Voltage Transformers and
the Sepam™ input circuits, port (see page 20).
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