Measurement Computing WavePort 312P rev.1.0 - Manual (Page 37)

PowerVista/312 User’s Manual Device Configuration 4-3
4.1.2 Connection Procedure
It is recommended that the following connection procedure always be followed when making external
connections. This procedure ensures that the instrumentation is always referenced so that step-and-touch
potential differences between the instrumentation and a user are minimized.
• Locate instrumentation in dry, well ventilated area.
• Determine location for connections in power equipment.
• Connect instrumentation safety ground, this must be done first.
• Connect voltage leads and clamp-on current transducers.
• Perform system setup and take measurements.
• Remove voltage leads and clamp-on current transducers.
• Remove safety ground, only after all other connections are removed.
WARNING !
ELECTRIC SHOCK HAZARD! Use proper electrical safety precautions when operating
this equipment. Ensure the Safety Ground is connected firmly to a good earth ground. The
safety ground connection must always be made FIRST (before leads and clamp-ons are
attached) and must always be the LAST connection removed (after all leads and clamp-ons
are removed).
Place protective shorts in V1, V2, V3, and V4 when the applicable input jack is not in use.
Use only those connectors that are approved for this device. Failure to observe safe
electrical practices could result in death or serious injury from electric shock.
Table 7. System external connection arrangements.
External Connection Setup PT Connection
Three Phase Grounded Wye Wye
Three Phase UnGrounded Wye Wye or Delta
Three Phase Delta Delta
Three Phase Open Delta Open Delta
Single Phase Wye
120/240 Service Wye