Daikin RoofPak RPS Series Installation And Maintenance Manual page 116

Terminal Connectors
The terminals are spring clamp type. They only require
inserting (see #1 in Figure 130) and clamping the wire to
be stripped, which offers several advantages over screw
terminals. The clamping is done by inserting a flat-bladed
screw driver (up to 9/64" wide). See #2 in
• Spring connection does not require torquing and resists
vibration
• Easily identifiable terminal markers
• Built-in test ports on each terminal, up to 2.3 mm
diameter (see #3 in Figure
Figure 130: Terminal Connectors
IM 926-3 • ROOFPAK APPLIED SYSTEMS
Figure 130.
130).
Phase Voltage Monitor (PVM)
The phase voltage monitor (see
protect three-phase loads from damaging power conditions.
A microprocessor-based voltage and phase sensing circuit
constantly monitors the three-phase voltages to detect harmful
power line conditions. When a harmful condition is detected,
its output relay is deactivated after a specified trip delay (Trip
Delay). The output relay reactivates after power line conditions
return to an acceptable level for a specified amount of time
(Restart Delay). The trip and restart delays prevent nuisance
tripping due to rapidly fluctuating power line conditions.
Other features:
• LED display to indicate status (see #1 in
— Loss of phase
— High or low voltage
— Voltage unbalance
— Phase reversal
— Rapid cycling
— Standard 1 to 500 second variable restart delay (see
#2 in Figure 131)
• Standard 2% to 8% variable voltage unbalance (see #3 in
Figure 131)
• Standard 1 to 30 second trip delay (see #4 in
Figure 131: Phase Voltage Monitor
Standard 2%–8%
variable voltage
unbalance
116
Maintenance and Service
page 83) is designed to
Figure 131)
Figure
Standard
1–500 second
variable
restart delay
Standard
1–30 second
trip delay
4
LED display
1
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131)