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IM02601004E
Page 175
11 Troubleshooting & Maintenance
Symptom
Probable Cause
Possible Solution
One or more voltage
phase(s) read incorrectly.
Blown or loose fuses.
Verify line voltage.
Incorrect voltage setting.
Check fuses(s) on effected
phase(s).
One or more currents read
incorrectly.
Incorrect current transformer
ratio setting.
Verify incoming current to the
meter with separate ammeter.
Verify correct settings pro-
grammed in ther meter for
system type, L-L voltage and
PT rating.
CT Shorting Screws
Power values are low when
CT shorting screws are in
place. Typically, the imped-
ance of shorting screws is not
much less than that of PXM’s
current inputs.
Power parameters (Watt,
Var, VA, Power Factor) read
incorrectly.
Phasing for voltage and cur-
rent is mismatched.
Examine the phasor diagram
as seen on the Meter web
page and compare phase
angles of Va, Vb, Vc, Ia, Ib, Ic,
to detect possible mis-wiring.
The phasor diagram is also
available on the Local Display
by using the following path:
Meter > VagL-L Voltage >
Vavg > Phasor.
Current transformers polarity is
reversed.
Verify connections per wiring
diagrams.
Reverse current trans former
leads. Verify ground wiring per
drawings.
Reverse current polarity via
settings. Enter password and
change CT compensation in
Setup mode. A CT compen-
sation value of - 1.0 has the
effect of reversing polarity.
CT Shorting Screws
Power values are low when
CT shorting screws are in
place. Typically, the imped-
ance of shorting screws is not
much less than that of PXM’s
current inputs.
Unit fails to detect contact
closure on Discrete Contact
Inputs.
Discrete Inputs not properly
configured.
Check meter setpoints.
Excessive ext contact resis-
tance.
Contact must be compatible
with 24Vdc, 10 mA.
Improper wiring or faulty ex-
ternal device providing contact
closure.
Contact welded.
Verify that external contact
actually closes and that imped-
ance is essentially zero when
contact is closed. Also, verify
wiring to Discrete Contact
inputs per drawings.
Содержание Power Xpert PXM 4000
Страница 1: ...User and Installation Manual IM02601004E Power Xpert PXM 4000 6000 8000 ...
Страница 8: ...Page vi IM02601004E www eaton ...
Страница 19: ...www eaton com IM02601004E Page 11 1 Introduction ...
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Страница 36: ...Page 18 IM02601004E www eaton com 2 Quick Start Guide for the Meter Module ...
Страница 45: ...www eaton com IM02601004E Page 37 3 Installation 3 8 MeterDimensions ...
Страница 46: ...Page 38 IM02601004E www eaton 3 Installation Dimension Con t ...
Страница 47: ...www eaton com IM02601004E Page 39 3 Installation Dimension Con t ...
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Страница 53: ...www eaton com IM02601004E Page 45 3 Installation ...
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Страница 75: ...www eaton com IM02601004E Page 67 4 Introduction to Web Server Screens ...
Страница 76: ...Page 68 IM02601004E www eaton 4 Introduction to Web Server Screens ...
Страница 86: ...Page 78 IM02601004E www eaton 5 Introduction to the Local Graphical Display ...
Страница 108: ...Page 100 IM02601004E www eaton 6 Functions on the Web Server Pages ...
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Страница 164: ...Page 156 IM02601004E www eaton 8 Setup on the Web Server Pages ...
Страница 198: ...Page 190 IM02601004E www eaton A MODBUS Communication ...
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Страница 252: ...Page 244 IM02601004E www eaton D Diagnostics ...
Страница 254: ...Page 246 IM02601004E www eaton D Diagnostics ...