AEM 3945-B Manual

A SERVICE OF

next previous

24

Power Quality Analyzer Model 3945-B

3.11 Three-phase 5A Adapter Box

This adapter is a three-phase adapter with three 5AAC inputs L1, L2, L3 and three

AC voltage outputs. All circuits are independent and isolated between input and

output. The outputs are equipped with connectors to mate with the PowerPad

®

Model 3945-B current channel inputs. It facilitates automatic sensor recognition

and probe ratio programming for both 1 Amp and 5 Amp output probes. Addition-

ally,theadapterboxcanbeuseddirectlyinseriesina5Ampcircuit.

WARNING: This adapter is rated EN 61010, 300V, Cat. III and permits the use of

standard current probes with either a 1 Amp or 5 Amp output.

TheinputconnectionsaccepteitherØ4mmmaleplugsorrigidleadsbetween1

and 2.5mm

2

inserted in the side hole after pressing the spring loaded connector

downtoexposethehole.

3.11.1 Connecting to Secondary Current Transformer (CT)

WARNING: Use caution when connecting to a secondary current transformer.

1. Short the two leads of each secondary current measurement transformer.

2. Never open a secondary circuit of a CT if its primary circuit is connected to a

supply voltage. In any case, disconnect the primary measurement transformer

circuit from the supply network.

3. Connect each CT secondary to the input of the 5A adapter in the correct order

(groundonP2)andtherightphaseorderL1,L2,L3.