Unipower UP-2210R User Manual

UNIPOWER
UP-2210R/P Hardware installation and configuration manual
23
4.4.6 3-phase 4 wire measurement with 2 CT’s and 2 PT’s
Figure 15
The above wiring diagram is used for three-phase measurement in public distribution networks with
2 CT´s and 2 PT’s. The voltage channels of the unit are connected to PT’s (normally 63 V AC
secondary to earth), for supplying line-to-line voltages, and current channels are connected to CT´s
(normally 1 - 5 A AC secondary). Always protect the voltage inputs with a suitable fuse in each
conductor on the secondary side of the PT. The connection for this type of measurement is as
follows:
Channel: Measured object: Channel: Measured object:
U1 = L1 PT+ I1+ = L1 CT+
U2 = L1 PT-, L3 PT- I1- = L1 CT-
U3 = L3 PT+ I3+ = L3 CT+
Ref = L1 PT-, L3 PT- I3- = L3 CT-

Unipower UP-2210R Specifications

General

Brand	Unipower
Model	UP-2210R
Category	Measuring Instruments
Language	English