Qualitrol 900/910 Rapid Pressure Rise Relays (RPRR)
Qualitrol 900/910 Rapid Pressure Rise Relays (RPRR)
The Qualitrol 900 Rapid Pressure Rise Relay provide protection and detection of dangerous sudden pressure changes in transformers.
The RPRR features patented mechanical detection of sudden pressure events based on the rate of pressure rise and safe limits established by transformer manufacturers. When a dangerous pressure rise has been detected, the Qualitrol rapid pressure rise relay (RPRR) will change state. This can be used as an alarm or trip signal to minimise the potential of transformer tank damage.
From the original creator of mechanical rapid pressure rise relays
The Qualitrol 900/910 RPRR has been built on over 25 years of experience and refinement in rapid pressure rise protection with greater than 100,000 units installed. Rapid pressure rise relays offer quick reaction to protect the transformer. Unlike other sudden pressure protection devices, Qualitrol RPRRs operate in oil or gas space for optimal detection of pressure events.
100% factory calibrated and tested to ensure performance
Every Qualitrol RPRR unit is serialised and calibration test results are recorded. Additionally they are factory tested for switch (contact) performance and response time. To provide further certainty in operation, Qualitrol provides a field test kit for simple GO/NO-GO test to assure proper functionality of the device in field.
The Qualitrol RPRR is a reliable preventative measure to safeguard transformers against further damage.
Qualitrol RPRR 900/910 Brochure
Rapid pressure rise relay
Features of the Qualitrol RPRR
Models designed for use in oil or gas space
100% tested for pressure rate release point
Protection and detection of dangerous sudden pressure changes
Devices calibrated to quickly alarm or trip during rapid pressure rise changes
Actuation only occurs based on rate of pressure rise and will not occur under normal pressure variations caused by temperature change and vibration
Can be subjected to full vacuum or 20 psi positive pressure without damage
Standard operation from -40 to 180°F ( -40 to 82°C)
Special units available for operation at -67°F (-55°C)
100% factory calibrated and tested to ensure performance
Units are serialised and calibration records maintained
Factory tested for switch (contact) performance and response
Field test kit available for simple GO/NO-GO test to assure proper functionality of the device
Multiple mounting and calibration options for gas or oil applications
Flange or thread mounting options available for vertical or horizontal mounting
Models calibrated for proper response in gas or oil space applications
From the original creator of mechanical rapid pressure rise relays
Original creator of patented bellows technology for mechanical rapid pressure rise detection
Over 25 years of experience and refinement in rapid pressure rise protection with greater than 100000 units installed
RPRR 900/910 Options
Horizontal or vertical mounting
Seal in relay (QUALITROL 909) for latching alarm or trip signal
Electrical connection types, cable size, lengths and wire colors
Gas bleed system
Field test kit (KIT-013) and factory test fixture (FIX-601)
Flange or thread mounting
Stainless Steel
“Actuation only occurs based on rate of pressure rise and will not occur under normal pressure variations caused by temperature change and vibration.”
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