sepam 20 user manual - Schneider Electric

DE80051
DE80059
Installation 1 A/5 A Current transformers
PCRED301005EN - 06/2008
CCA634
.
CCA630/CCA634 connector
Function
The current transformers (1 A or 5 A) are connected to the CCA630 or CCA634
connector on the rear panel of Sepam:
b The CCA630 connector is used to connect 3 phase current transformers to Sepam
b The CCA634 connector is used to connect 3 phase current transformers and a
residual current transformer to Sepam.
The CCA630 and CCA634 connectors contain interposing ring CTs with through
primaries, which ensure impedance matching and isolation between the 1 A or
5 A circuits and Sepam when measuring phase and residual currents.
The connectors can be disconnected with the power on since disconnection does not
open the CT secondary circuit.
DANGER
HAZARD OF ELECTRIC SHOCK, ELECTRIC ARC OR BURNS
b Only qualified personnel should install this equipment. Such work should be
performed only after reading this entire set of instructions and checking the
technical characteristics of the device.
b NEVER work alone.
b Turn off all power supplying this equipment before working on or inside it.
Consider all sources of power, including the possibility of backfeeding.
b Always use a properly rated voltage sensing device to confirm that all power
is off.
b To remove current inputs to the Sepam unit, unplug the CCA630 or CCA634
connector without disconnecting the wires from it. The CCA630 and CCA634
connectors ensure continuity of the current transformer secondary circuits.
b Before disconnecting the wires connected to the CCA630 or CCA634
connector, short-circuit the current transformer secondary circuits.
Failure to follow these instructions will result in death or serious injury.
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