janitza 14.02.001, Руководство пользователя и технические данные

Страница: 27 / 86

www.janitza.com UMG 804
27
8.2.2 Extensions of CT wires
·Branch CT wires can be extended by using ex-
tension leads that are available in a variety of
lengths.
·Alternatively CTs may be spliced onto longer
wires assuming an acceptable splicing method is
used and carried out by a qualified person.
Extensions Lead
Mating Connectors
8.2.3 Auxiliary Inputs
·Each CT strip is equipped with three auxiliary CT
terminals designed to support CTs for panel main
input monitoring or additional branch circuits.
·The inputs are designed exclusively for 0.33 V
output CTs.
·Typically only one CT strip (3 CTs) is used to
monitor the mains as no neutral CT is needed as
neutral can be derived using “True Circuit” con-
figuration however all auxillary terminals can be
used for mains monitoring I.e. L1, L2, L3, N, G or
as extra terminals for branch circuits.
·Always be aware which strip was used to monitor
the mains – use the strip plugged into Smart Port
1 and 3 to be consistent.
·Note that polarity and orientation of the CTs will
be automatically corrected.
·Note that versions of the UMG 804 can use the
Virtual Meter function to accurately total the
branch circuits eliminating the need for main input
CTs.
SMART
PORT
CT Terminal
22
CT Terminal
23
CT Terminal
24
PANEL
1 L1 L2 L3 1
2 Neutral N/A N/A
3 L1 L2 L3 1
4 Neutral N/A N/A
24 23 22
L3 L2 L1
(C) (B) (A)