sepam 20 user manual - Schneider Electric

PE50031
DE51674
Installation LPCT type current sensors
CLP1 LPCT sensor
CAUTION
HAZARD OF NON-OPERATION
b Set the microswitches for the CCA670/
CCA671 connector before commissioning the
device.
b Check that only one microswitch is in position 1
for each block L1, L2, L3 and that no microswitch
is in the center position.
b Check that the microswitch settings on all 3
blocks are identical.
Failure to follow these instructions can cause
incorrect operation.
PCRED301005EN - 06/2008
Function
Low Power Current Transducer (LPCT) type sensors are voltage-output sensors,
which are compliant with the IEC 60044-8 standard.
The Schneider Electric range of LPCTs includes the following sensors: CLP1, CLP2,
CLP3, TLP160 and TLP190.
CCA670/CCA671
connector
Function
The 3 LPCT sensors are connected to the CCA670 or CCA671 connector on the rear
panel of Sepam.
The connection of only one or two LPCT sensors is not allowed and
causes Sepam to go into fail-safe position.
The two CCA670 and CCA671 interface connectors serve the same purpose,
the difference being the position of the LPCT sensor plugs:
b CCA670: lateral plugs, for Sepam series 20 and Sepam series 40
b CCA671: radial plugs, for Sepam series 80.
Description
1 3 RJ45 plugs to connect the LPCT sensors.
2 3 blocks of microswitches to set the CCA670/CCA671 to the rated phase current
value.
3 Microswitch setting/selected rated current equivalency table (2 In values per
position).
4 9-pin sub-D connector to connect test equipment (ACE917 for direct connector or
via CCA613).
Rating of CCA670/CCA671 connectors
The CCA670/CCA671 connector must be rated according to the rated primary
current In measured by the LPCT sensors. In is the current value that corresponds
to the rated secondary current of 22.5 mV. The possible settings for In are (in A): 25,
50, 100, 125, 133, 200, 250, 320, 400, 500, 630, 666, 1000, 1600, 2000, 3150.
The selected In value should be:
b entered as a Sepam general setting
b configured by microswitch on the CCA670/CCA671 connector.
Operating mode:
1. Use a screwdriver to remove the shield located in the "LPCT settings" zone; the
shield protects 3 blocks of 8 microswitches marked L1, L2, L3.
2. On the L1 block, set the microswitch for the selected rated current to "1" (2 In
values per microswitch).
b The table of equivalencies between the microswitch settings and the selected
rated current In is printed on the connector
b Leave the 7 other microswitches set to "0".
3. Set the other 2 blocks of switches L2 and L3 to the same position as the L1 block
and close the shield.
6/19
6