GE
Energy Connections
Models APVR
Phase Loss
Phase Sequence Detection System
Application
Protection of three phase electrical
equipment sensitive to damage due to
loss of phase, phase unbalance or
improper phase sequence.
Nominal Input Voltages
120 V, 208 V, 240 V, 380 V, 415 V, 480 V,
575 V
Ambient Temperature Range
Operation: - 30°C to + 60°C
Storage: -55°C to +85°C
Terminal screws are #6-32 nickel
plated brass.
Shipping weight 0.6 lbs.
Frequency
50 Hz., 60 Hz.
Available for the following 3-phase voltages:
U
Canadian C
103039
L
,
U
L
103039
Specifications
Failsafe: Trip free contacts will not
operate if a fault is present.
Automatic reset. (Configurable to
manual reset, See applications notes.)
Fixed undervoltage trip point: approx.
90% pick up, 80% dropout.
Operates at 6% phase unbalance.
Operates green LED indicator.
Isolated Form “ C ” output contacts.
Output contact rating: 250 V ac,
5 Amps, (general use).
Input voltages up to 575 V ac.
3 second drop-out delay to avoid
nuisance tripping
Model APVR
The device is shipped from the factory in the automatic reset mode with a jumper on terminals 6 & 7. Operation can be changed from automatic
APVR Typical Wiring Diagram
Applications Notes
If the power conditions are normal, 3 seconds after power is supplied to the APVR the contacts will transfer, permitting operation. In normal
applications, this power will already be applied to the APVR and there is no time delay in operating.
The correct phase sequence must be established upon initial installation for proper operation of the relay. Any subsequent change in phase will
cause the relay to trip. If the relay is re-energized and the phase sequence is incorrect the relay will not operate.
reset to manual reset by removing the external jumper. Automatic reset means that upon fault removal the device reset automatically to
perform is mounting function. For manual reset simply remove the jumper and connect a normally open pushbutton across terminals 6 and 7.
Upon application of power the green LED indicator will illuminate. If a fault exists the green LED will remain illuminated for these three seconds
and then go out. This is normal and indicates that line power is present but a fault condition has been detected. The output contacts will remain
in their de-energized failsafe state.
If no fault exists upon application of power the green LED indicator illuminates and three seconds later the relay contacts transfer. Upon
detection of a fault, the green indicator light will go out and three seconds later the relay contacts revert to their de-energized state. This three
second delay prevents nuisance tripping of the APVR.
In service the line voltage to the device may be interrupted on various occasions. In the automatic reset mode the device will resume its
monitoring function approximately three seconds after power is restored. In the manual reset mode the reset pushbutton must be pressed.
“Failsafe” operation is achieved by the following features:
1) The relay is energized and the output contacts are transferred under “ normal ” conditions only.
2) Should the output relay itself fail or in the event of internal circuit failure, the relay will revert to the de-energized position
Unbalance Calculation
Max. deviation from average
Average
Example:
ØA - ØB = 240 V; ØB - ØC = 220 V;
ØC - A 215 V; Average = 225 V
Max. deviation from average = 240 - 225 = 15 V
% Unbalance = 15
225
x 100 = 6.67 %
x 100 =% unbalance
Grid-AIS-L4-ITI_Model_APVR-1579-2017_06-EN. © Copyright 2017. General Electric Company
and Instrument Transformers LLC reserve the right to change specifications of described
products at any time without notice and without obligation to notify any person of such changes.
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