Page 67 - catalogue-2024

Energy Quality

Protection Relays / DPR-145 MV Temperature Protection Relay

DPR-145
TEMPERATURE PROTECTION RELAY

PT100 INPUTS: 4
RELAY OUTPUTS: 4
RS-485 MODBUS PORT
19-150VDC SUPPLY

DPR-145 is a precision unit designed for the temperature protection of dry
type or resin filled MV transformers. The unit offers a high degree of
protection against electromagnetic disturbances.
The unit has 4 temperature inputs of PT100 type.
Three of them are used for the transformer protection.
The fourth input may be used as core temperature protection or ambient
temperature monitoring. Alarm and trip levels of the unit are independently
adjustable for first 3 sensors and the fourth sensor input.
FEATURES
• 1 degrees C measurement precision • MODBUS-RTU communication • Wide supply voltage range: 19-150VDC
• 4 x PT100 analog inputs • Recording of maximum temperatures • AC supply version available (85-305VAC)
• Allows cable length compensation • Front panel programmable • Reduced panel depth, easy to install
• Automatic detection of sensor failures • 2 alarm thresholds for channels 1-2-3 • Wide operating temperature range, -20 to +70°C
• Automatic and manual self test • 2 alarm thresholds for channel 4 • Sealed front panel (IP65 with gasket)
• 4 x relay outputs, 5A/250Vac • Easy to read, 3 digit 14mm led display • 2 part connection system
• Fully isolated RS-485 serial port

DPR-165 Transformer Step & Temperature Indicator

DPR-165

TRANSFORMER STEP & TEMPERATURE INDICATOR

DPR-165 is a microprocessor controlled precision instrument displaying
steps and temperatures of MV/HV transformers. The unit has a high degree
of protection against electromagnetic noises.
The unit determines the step by measuring the resistive converter of the
transformer.
FEATURES
• Up to 50 steps • MODBUS-RTU communications
• Installation without energy interruption • Logging of maximum temperature
• Accurate step measurement input, 10 bit • Front panel adjustable parameters
• 16 bit analog output accuracy • Temperature alarm threshold level
• 10 bit analog input accuracy • Easy to read, 4 digits 14mm led display
• PT100 temperature input, 1°C accuracy • Minimum 20 years data retension
• Cable length compensation • Wide supply range: 88-400 VDC (85-270VAC)
• Automatic sensor failure detection • Low panel depth, easy installation
• 2 relay outputs, 6A/250Vac • Wide operating temp. range, -20...+70°C
• Fully isolated RS-485 serial port • Sealed front panel (IP65 with gasket)
• Two part connection system

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