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Due to RMS continuous product improvement policy this information is subject to change without notice. 2V164-S/Issue F/08/04/11 - 5/9
VOLTAGE SENSING CIRCUITRY
Nominal monitoring voltage
IN QUAD connection:
110V 50HZ
I
N PHASE connection:
63.5V 50Hz
Sensing supply burden:
Less than 0.2VA
T
hermal rating:
300V continuous
N
ominal sensing frequency:
40 to 60Hz
Voltage measurement secondary accuracy (110V tap):
Precision of voltage setting:
0.1V steps
Voltage pick up repeatability:
+/-0.1V from 90 to 120V
Voltage measurement resolution: 45mV
Resolution of voltage display:
0.1V
A
ccuracy of displayed voltage:
+/-0.1V from 90 to 120V
ACCURACY OF TIMERS
All /-0.1s
LINE DROP COMPENSATION (LDC) INPUT
Nominal sensing current:
CT taps for 1A and 5A inputs
LDC input burden:
<0.5VA
Thermal rating:
3x nominal continuous
3.5x nominal for 10 minutes
6x nominal for 2 minutes
100A for 1s on 1A input
350A for 1s on 5A input
700A for 1 cycle on 1A input
2,500A for 1 cycle on 5A input
Note: M Series case terminals and CT shorting
switches are limited to 400A for 1s.
LDC accuracy:
+/- 0.3V error at nominal 110V setting and 10 to
120% CT input
SET POINT HYSTERESIS
All voltage set points have a hysteresis equal to 50% of the
bandwidth voltage setting. Other values available on application.
Technical Data
TAP CHANGE FEEDBACK FUNCTION
When a tap change command is output to the OLTC, the tap
change fail timer is started. If a single tap change restores the
sensed voltage to a balanced condition the relay is reset. If the
sensed voltage remains in error the interval time delay will start
based on one of the three methods described below: The
required operating mode is selected using the UMX order code.
VOLTAGE MONITORING (Automatic mode)
UMX2V164
A
In this mode the 2V164 provides a 1s output pulse to initiate a tap
change. This output pulse is then repeated at a rate set by the
Interval Timer setting until the sensed voltage has moved back to
a balanced condition. This is the simplest connection method as it
does not require a hard-wired contact between the OLTC and the
VRR.
The output pulse may be selected as continuous for application
with linear voltage regulators. The continuous output contact and
interval timer delay is reset once the sensed voltage moves back
to the balanced condition.
OLTC AUXILIARY CONTACT METHOD
UMX2V164
B
In this mode an auxiliary contact on the OLTC is employed to
signal completion of a tap change sequence. This signal is used
by the 2V164 to pause the interval time delay until the previous
tap change sequence has been completed.
The default 2V164 T/C feedback status input is set for a control
voltage to be removed when the tap change starts (OLTC
auxiliary contact opens) and re-applied when the tap change
sequence is completed (OLTC auxiliary contact closes). The
interval time delay is paused until the completion of the tap
change sequence has been signaled.
The output pulse may be selected as continuous or to provide a
1s pulse output.
The continuous output contact and interval time delay is reset
once the sensed voltage moves back to a balanced condition.
TPI FEEDBACK METHOD
UMX2V164
C
In this mode the 2V200 TPI transducer must be connected as per
figure 2. The control sequence is as follows:
1. A voltage deviation starts the initial time delay.
2. The time delay expires and a tap change command is output.
3. The tap change contact will remain closed until a signal is
received from the TPI transducer confirming that a tap
change event has occurred.
4. The interval time delay is initiated.
5. Sequence 2 to 4 will repeat at the rate determined by the
Interval timer setting until the sensed voltage has moved back
to a balanced condition.
TAP POSITION TRANSDUCER FAIL
(UMX2V164C only)
In the event that a 2V200 TPI transducer loses connection to the
2V164 or fails, any pending tap commands are blocked.
For TPI transducer (2V200) failure conditions, a ‘TPI Fail’
message is displayed on the MMI and the tap position displays as
‘TPI Offline’. The TPI fail output contact is also set.
Normal tap change feedback and voltage regulation control
function is automatically restored once the TPI transducer signal
is recovered.
It should be noted that the ‘TPI fail alarm’ and the ‘Tap change fail
alarm’ share a common output contact.
LINE VOLTAGE ANALOGUE OUTPUT
Output:
4 to 20mA
Compliance voltage:
5V
Maximum burden:
250 Ohms
Accuracy: +/-3%
Analogue output:
Lower (4mA) set point range: 0V - 146V
Upper (20mA) set point range: 50V - 146V
