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PCRED301005EN.book Page 12 Mardi, 19. juillet 2005 9:49 09
Current transformers 1 A/5 A
1 A or 5 A CT block and connection
diagram
The current transformer (1 A or 5 A) secondary
windings are connected to the CCA630 connector, item
B.
DE52150
Installation
The connector contains 3 interposing ring CTs with
through primaries, which ensure impedance matching
and isolation between the 1 A or 5 A circuits and
Sepam.
The connector may be disconnected with the power on
since disconnection does not open the CT secondary
circuits.
MT10464
CCA630 connector
EM
B4
B1
P1
L1
B5
B2
P2
L2
L3
B6
B3
(1)
CCA630
Sepam current
inputs
6
1
2
3
(1) Bridging strap supplied with the CCA630.
b open the 2 side shields for access to the connection
terminals. The shields may be removed, if necessary, to
make wiring easier. If removed, they must be replaced
after wiring
b remove the bridging strap, if necessary. The strap
links terminals 1, 2 and 3
b connect the wires using 4 mm ring lugs and check
the tightness of the 6 screws that guarantee the
continuity of the CT secondary circuits. The connector
accommodates wires with cross-sections of 1.5 to 6
mm2 (AWG 16 to AWG 10)
b close the side shields
b plug the connector into the 9-pin inlet on the rear
panel, item B
b tighten the 2 CCA630 connector fastening screws on
the rear panel of Sepam.
6/12
MT10318
CCA630 wiring
PCRED301005EN - June 2005