DTSU666-H 100 A and 250 A Smart Power Sensor
Quick Guide
Issue: 02
Date: 2019-08-30
HUAWEI TECHNOLOGIES CO., LTD.
1Overview
Model Naming Conventions
DTSU666-H 100 A/40 mA, DTSU666-H 250 A/50 mA
DTSU666-H 100 A/40 mA is abbreviated as DTSU666-H.
Appearance
Differences between DTSU666-H and DTSU666-H 250 A/50 mA:
•Parameters on the panel
DTSU666-H DTSU666-H 250 A/50 mA
Voltage Input: 3×230/400 V or 3×400 V
Current Transformer(CT): 100 A/40 mA or 250 A/50 mA;
Category DTSU666-H DTSU666-H 250 A/50 mA
Data update period < 0.35s < 0.5s Measurement range 0–100 A 0–250 A
Power grid system
Three-phase four-wire
Three-phase three-wire, three-phase four-wire
•
Nameplate
DTSU666-H DTSU666-H 250 A/50 mA
service faultAppearance
Performance and Specification
Port Definition
2
Installing the DTSU666-H and DTSU666-H 250 A/50 mA
3
Installing the Cable
1.Install the smart power sensor on the standard din rail of DIN35mm
2.Install the Smart Power Sensor to the standard din rail from the top to the bottom, and then push the instrument to the din rail from the bottom to the front part.
Cable Port Type Conductor Cross-sectional Area Range
Outer Diameter
Source
AC  power cable
Ua-3
Four-core outdoor copper cable
4-6 mm 2
10-21 mm Prepared by the customer
Ub-6Uc-9Un-10CT cable
IA*-13///Manufacturer
IA-14
///IB*-16///IB-17///IC*-19///IC-21
/
/
/
Comm. cable
RS485A-24Two-core outdoor shielded twisted pair
0.25-1 mm 24-11 mm Manufacturer
RS485B-25
Prepare cables
Wiring Diagram--Three Phase Four Wire Support model:
•DTSU666-H
•DTSU666-H 250 A/50 mA
Voltage specifications:
•Phase voltage: 176–288 V AC
•Extended 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
Voltage specifications:
•Line voltage: 304–499 V AC
•Extended 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.

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