IQ DP-4000
SECTION 5 - PROGRAMMING THE IQ DP-4000 TD 17548B
29
5.12.12 Overvoltage Detection Level Alarm
Setpoint
This setpoint activates the alarm on an overvoltage
condition (see Section 5.12.3). You must determine the
overvoltage detection level. The overvoltage detection
level is selected as a larger percentage of the nominal
AC line voltage (see Section 5.5 p.23).
If the sampled voltage is greater than the overvoltage
detection level for longer than the alarm delay (see
5.12.10 p.28), the enabled alarm activates. See Table
5.T for setting the overvoltage detection level.
= OFF = ON
Alarm 1
(Set all 8 S2 switches)
Alarm 2
Detection
Level
S3.8 S3.9 S3.A S3.B
%
S2.8 S2.1 S2.2 S2.8 S2.1 S2.2
off off off off Off off 105
on off off on off off 110
off on off off on off 115
on on off on on off 120
off off on off off on 125
on off on on off on 130
off on on off on on 135
on on on on on on 140
Table 5.T Overvoltage Detection Level Settings
5.12.13 Undervoltage Detection Level Setpoint
The undervoltage detection level is a lower percentage
of the nominal AC line voltage. When the alarm is set to
activate on an undervoltage, you must determine the
detection level. See Sections 5.5 (p.23) & 5.12.4
(p.27).
The alarm activates when the sampled voltage is less
than the undervoltage detection level for longer than the
alarm delay (see 5.12.10 p.28).
= OFF = ON
Alarm 1
(Set all 8 S2 switches)
Alarm 2
Detection
Level
S3.9 S3.B
%
S2.3 S2.4 S2.5 S2.3 S2.4 S2.5
off off off off off off 60
on off off on off off 65
off on off off on off 70
on on off on on off 75
off off on off off on 80
on off on on off on 85
off on on off on on 90
on on on on on on 95
Table 5.U Undervoltage Detection Level Settings
5.12.14 Voltage Phase Unbalance Detection Level
Alarm Setpoint
If the selected alarm has been set to activate on a
voltage phase unbalance (see 5.12.6 p.27), you must
determine the voltage phase unbalance detection level.
A voltage phase unbalance is calculated by taking the
maximum voltage deviation between any two phases
and comparing that voltage to a percentage of the
nominal AC line voltage.
If the sampled voltage deviation is greater than the
voltage phase unbalance detection level for longer than
the alarm delay (see 5.12.10 p.28), the alarm activates.
See Table 5.V for setting the voltage phase unbalance
detection level.
= OFF = ON
Alarm 1
(Set all 8 S2 switches)
Alarm 2
Detection
Level
S3.9 S3.B
%
S2.6 S2.7 S2.8 S2.6 S2.7 S2.8
off off off off off off 5
on off off on off off 10
off on off off on off 15
on on off on on off 20
off off on off off on 25
on off on on off on 30
off on on off on on 35
on on on on on on 40
Table 5.V Voltage Phase Unbalance Detection
Level Settings
5.12.15 Alarm Reset Threshold Setpoint
The IQ DP-4000 has three alarm conditions with
programmable thresholds:
• overvoltage
• undervoltage
• voltage phase unbalance
You must set the levels for the IQ DP-4000 alarm to
reset. Both alarms have an independent reset
threshold; however, the reset threshold is common to all
three alarm conditions.
The reset threshold is based on the detection levels set
for the alarm conditions, as well as the nominal AC line
voltage. The reset thresholds are described for each of
the three programmable alarm conditions. See Table
5.W for setting the reset threshold.
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