Page 40 - Essailec Test Blocks

Voltage transformers application
Break before make test principle - With 2x4 or 4 poles test plug

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

1. Normal service 2. Preparation: plug

2 1

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1.1 ESSAILEC voltage sockets 1.2 The lid is installed on the Connect the ESSAILEC test
allow the simultaneous testing op- socket and can be sealed to pre- plug leads to the test set.
erations of 1 to 4 independent cir- vent unauthorized access. The
cuits on the same socket. socket has no mobile
contacts (closed style) (1).
Circuit continuity is ensured by the
lid equipped with built- in contact
4
pins (2).

2

Preparation

1

Normal
service
5. Back to normal service

5
Back to
normal
service

5.1 When the plug is removed, 5.2 When lid is put back in place,
signals are disconnected. signals flow again through the
socket.

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INDUSTRIAL /// ENTRELEC - ESSAILEC TEST BLOCKS