Page 628 - Entrelec Terminal Blocks Master Catalog

Current transformers application
Make before break test principle - With 2x4 poles test plug

Applications
• Measurement on CT’s
• Injection
• Equipment replacement

1. Normal service 2. Preparation: plug and lid

®
1.1 ESSAILEC current 1.2 The lid is installed on the 2.1 The lid is removed. 2.2 Connect the ESSAILEC
®
sockets allow the simul- socket and can be sealed to test plug leads to the test
3
taneous testing opera- prevent unauthorized ac- set. (For equipment change
tions of 1 to 4 indepen- cess. The socket circuits or injection, short-circuit
dent circuits on the are closed and signals flow externally the 4 test leads con-
same socket. from nected on the current trans-
current transformers former side: 1-2-3-4)
to the equipment to be
tested.

2

Preparation

1

Normal
service
5. Back to normal service

5
Back to
normal
service

5.1 Plug removal closes back the socket 5.2 Lid is put back in place.
contacts and signals flow again through
the socket.

®
INDUSTRIAL /// ENTRELEC - ESSAILEC TEST BLOCKS