Page 21 - Essailec Test Blocks

3. Test phase: Make 4.1 Measurement: Test phase - Break

1
3 2

1

COR-C-R4-6.6

During plug insertion, plug pins make contact with socket When the plug is fully inserted in the socket, inner mobile con-
pins (1). Contacts remain closed and the signal flow has tacts (2) are pushed down by plug’s plastic leads (3) and the
3
not change. This operation prevent signal four circuits are opened simultaneously. Signals are derived
interruption (mandatory for current transformers). into the plug towards the test set without
interruption of continuity.

4.2 Injection or equipment
replacement: Test phase - Break
3

Test phase:
Make Injection
5

Short-circuited
4
4
4
Test phase: During preparation phase, the plug 4 test leads (1-2-3-4: cur-
Break
rent transformer side) have been short-circuited
externally (4).
When the plug is fully inserted in the socket, the current
transformer is automatically short-circuited and
current injection (or equipment change) can be done
on the equipment side (5).

1SNC169011S0201

PAGE 19