Features
Field adjustable fast pressure rise and slow pressure settings
User selectable contacts for momentary or seal-in actuation with front panel LEDs status indicators
Constant milliamp output proportional to tank pressure for remote indication or for use with SCADA systems
3 transducer versions available with various logic schemes for greater flexibility and reliable trip functionality
Detection and protection of dangerous pressure conditions
Electronic pressure sensors continuously output current pressure level with logic to detect dangerous rapid pressure and static (slow) pressure change events
Local LED indication and relay actuation for rapid pressure and static pressure events
Selectable seal-in relay function keeps the indicating LEDs lit and relays (contacts) actuated until manually reset
Eliminate nuisance operations with adjustable sensitivity and multi-sensor logic
Special models feature 2 of 3 logic to trigger a trip signal only if 2 of the 3 pressure sensors experience a pressure event exceeding set points
Adjustable fast (rapid) pressure rise and slow pressure rise set points for custom operation for your particular acceptable risk level
Momentary or seal-in actuation of control and alarm signals can be selected
Sensors feature individual set points to for control schemes to provide alarms prior to trip signals should a pressure event occur (to alert personnel of nonstandard conditions without tripping the unit)
Monitor pressure remotely with SCADA outputs
Continuous 0-1mA or 4-20 mA output signal is supplied from each channel for remote transformer pressure indication or SCADA system integration
Up to 9 SPDT relays (6 for fast pressure rise, 2 for slow pressure rise, 1 for power status)
Easy to install with retrofit mounting plates and options for many applications
Pressure sensors can be mounting via flange mount adapter for retrofit to exiting installations of Qualitrol 900/910 flange mount rapid pressure rise relays
Sensors have 1/4″ NPT male fitting for easy mounting or adapting to existing fill ports
Sensor are suitable for installation in gas or oil space of transformers
Universal power supply accepts any input voltage in the range of 85-265 VAC 50/60 Hz or 110-370 VDC
Options
Heavy duty transducers for high humidity applications
Weather proof enclosure for mounting outside the control cabinet
Single sensor or multi-sensor logic
Qualitrol 900/910 retrofit mounting plate
SCADA outputs (0-1 or 4-20mA
Applications
For use on transformer and load tap changer tanks to sense dangerous fast or slow (static) pressure increases and provide alarm and trip functions.