Huawei DTSU666-H Quick Manual page 5

A fuse and a thermistor are
connected to each phase of Ua,
Ub, and Uc inside the power
meter to prevent damage caused
by external short circuits. Ua, Ub,
and Uc do not need to be
protected by external fuses.
Wiring Diagram--Three Phase Four Wire
Support model:
•
DTSU666-H
•
DTSU666-H 250 A/50 mA
Operating voltage: 0.7–1.3 Un
1. Three phase four wire:
Connect the Ua, Ub, Uc,
Un voltage lines to the 3, 6,
9 and 10 terminals of the
collector. Connect current
transformer outlets IA*, IA,
IB*, IB, IC*, IC to terminals
13, 14, 16, 17, 19, 21 of
the collector.
2. Connect RS485A and
RS485B to the
communication host.
Wiring Diagram--Three Phase Three Wire
Support model:
•
DTSU666-H 250 A/50 mA
Operating voltage: 0.7–1.3 Un
1. Three phase three wire：
Connect the Ua, Uc, Ub
voltage lines to the 3, 9 and
10 terminals of the
collector. Connect current
transformer outlets IA*, IA,
IB*, IB, IC*, IC to terminals
13, 14, 16, 17, 19, 21 of the
collector.
2. Connect RS485A and
RS485B to the
communication host.
The CT direction must be consistent with the arrow direction as
shown in the preceding figure.
NOTE
The CT direction must be consistent with the arrow direction as
shown in the preceding figure.
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