AccuEnergy AcuRev 2000, Руководство пользователя

Страница: 31 / 270

23
Voltage Input signal
400Vac L-N , 690Vac L-L.A fuse (typical 1A/250Vac) or air circuit breaker must be used in the
voltage input loop.
Current Input signal
Current Input has two options: Direct Connection or Via CT (Current Transformer)
Connection.DM module is utlized in Direct Connection, while EM module is utilized in Via
CT Connection.
For Direct Connection, each tenant maximum current is 80A, nominal current 20A.
For Via CT Connection, the CTs are solid core type, and should be installed first.The CT
accuracy is 0.2%, options are 20A, 80A, 150A, 200A, 250A, 1000A Current transformer or
0.333V Voltage Transformer.
Vn Connection
Vn is the voltage reference point of AcuRev 2000, a low resistance to Vn connection
contributes to a better measurement accuracy.Vn connection is related to the system
wiring. Please refer to "Wiring Methods" for details.
Wiring Methods
AcuRev 2000 wiring methods can be selected in system parameter settings. Inline defaults
to 3-phase 4-line(3LN), load wiring can be set to single-phase (1LN), three-phase four-wire
(3LN), single-phase three-wire (2LN).
The followings introduces EM and DM wiring methods in those three scenarios.
1. Single phase out(1LN)