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825-PD
The 825-PD module is a motor relay module that has been designed and manufactured by Allen-Bradley/Rockwell Automation in the Bulletin 825 series. It is used to protect 3-phase motors in industrial systems. The 825-PD motor relay module provides thermal overload protection, overtemperature protection, overcurrent protection, undercurrent protection, and short circuit protection. Its input voltage range is from 24 to 48 Volts DC. The 825-PD motor relay module's operating temperature range is from -4 to 140 degrees Fahrenheit with 5 to 95% relative humidity (non-condensing).
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Technical specifications for 825-PD
| Manufacturer | Allen Bradley |
|---|---|
| Product Type | Modular Protection System |
| Product Line | 825 Smart Motor Managers |
| Part Number | 825-PD |
| UPC | 781180030994 |
| Weight | 3.69 lbs (1.67 kg) |
| Voltage | 24-48VDC |
| Operating Range | 0.80-1.1 Us |
| Communication | DeviceNet |
| Rated Frequency (V ac) | 50/60Hz +/- 5Hz |
| Output Relay Rated Insulation Voltage | 300V ac |
| Output Relay Rated Operating Voltage | 240V ac |
| Input Operating Range | 0.80-1.1 Ue |
| Input On-state Voltage | 15V |
| Input Off-state Voltage | 5V |
| Input On-state Current | 2mA |
| Input Off-state Current | 0.5mA |
| Protection features | • Thermal Overload (thermal model) • PTC (positive temperature coefficient) Overtemperature • Undercurrent (Load Loss) • Current Imbalance and Phase Loss • Overcurrent (Load Jam) • Short Circuit • Ground Fault (Residual) • Ground Fault (Zero Sequence) • Motor Starting/Running – Protection Inhibit During Start – Start Motor Timer – Notching or Jogging Device – TCU (Thermal Capacity Utilization) Start Inhibit – Anti-Backspin Timer – Emergency Start – Two Speed Protection – Reduced Voltage Starting (Star-Delta) – Stall-Speed Switch • Frequency |
| Installation | Flush Mounting |
The 825-PD Modular Protection System is a DC-powered (24-48V DC) modular motor protection system by Allen Bradley with voltage-based, RTD-based protection options, and DeviceNet Network capability. It is designed specifically to protect industrial three-phase motors. It comes with the Allen-Bradley 825-MCM420 Current Converter Module which monitors the current consumption of motors, a Relay Voltage Input Option Card with an operational voltage range of 67-300V AC (line-to-line), and with a 4KV impulse strength and a transition voltage of 5-15V. It comes with a PTC thermistor input, with a 1500 Ohm Cold Resistance Chain, and a Trip Resistance range of 3400 Ohms +/- 150 Ohms with a 1500-1650 Ohm Reset Resistance range. The 825-PD has a control circuit with 24-48V DC control voltage range and a maximum power rating of 15W. It has a relay output with an Aux1 to Aux6 Trip Relay contact and a relay operational current of 3A. The 825-PD also has 4kV relay output impulse strength, with a dropout time of < 8ms, and with a contact reliability of 5mA at 17V. It has a 24V AC/DC input, with a steady-state current of 15mA and an ON/OFF state voltage of 15V/5V at 2mA and 0.2mA ON/OFF state current. It provides Thermal Overload protection, optional voltage-based protection (over-voltage, reactive power, phase reversal, and under-voltage), and a Resistance Temperature Detector (RTDs) based protection using the 825-PR12D RTD external Scanner. The 825-PD has built-in fixed keypads on the programming panel, with a single-line display LCD status screen, and LED Alarm/Trip FAULT indicators. It provides digital link with other connected devices on the DeviceNet network, via it DeviceNet Communication port with Transmission rates of 125, 250, and 500kbps, and it comes in a NEMA 4 (IP65) rated protective enclosure. The 825-PD has a working temperature range between -20 and +60 Deg. Celsius (-4 and +140Deg. Fahrenheit), at a humidity range of 5-95%, without condensation, and it can still maintain an optimal function at an altitude of 2000m. It weighs about 6.46Kg (with the power supply and converter module), and it is UL, CE, and CSA-certified.
The 825-PD external input voltage range of 24-48VDC. When wiring this device, appropriate wire size is 16 AWG (1.5 mm2 ) size or heavier wire to connect the 825-PD power terminals to the source. Connections must be in compliance with the IEC 947-1 and IEC 947-3 specifications. Circuit breakers, switch and overcurrent device may be installed along the input power wires of the 825-PD motor relay.
The 825-PD motor relay can be used for a variety of motor applications such as Low and medium voltage with 2 or 3 potential transformers, with or without phase current transformers, With or without zero-sequence core balance current transformer, with or without external RTD module, Reversing starter, Star-delta starting and Two-speed motors
When installing the 825-PD, create a panel cutout with measurement of 138.0 mm (H) x 186 mm (W). This motor relay is flush mounted and requires maximum panel depth of 6.5 mm. Use the provided Eight (8) ½ inch mounting screws to mount the motor relay in in place with Torque of 0.9...1.3 N.m (8...12 Lb-in). Ensure that the gasket is properly seated to ensure proper sealing of the device.
| Revision Part # | Also known as | |
|---|---|---|
| 825-PD Ser A | 825-PD/A, Series A, Rev A | |
| Don't see your particular revision? Contact us now. | ||
- 825PD
- B25-PD
- B25PD
Does the 825-PD come with a warranty?
Yes, the 825-PD includes a free 2-year DO Supply warranty. You can upgrade to a 3-year warranty at checkout for even more protection.
What is the difference between the 825-PD and the 825-P modular protection systems?
The difference are the power supply requirements. The 824-P is powered by an external voltage source of 110-240VAC while the 825-PD is powered by 24-48VDC.
What is the supported mounting method of the 825-PD?
The 825-PD motor relay is a flush mounted device.
What is the appropriate panel cutout for flush mounting the 825-PD?
Appropriate panel cutout is 138.0 mm (H) x 186 mm (W).
The Allen-Bradley 825-PD is a Motor Relay used as protection device for 3-Phase motors. It features standard protection capabilities such as Thermal Overload (thermal model, PTC (positive temperature coefficient) Overtemperature, Undercurrent (Load Loss), Current Imbalance and Phase Loss, Overcurrent (Load Jam), Short Circuit, Ground Fault (Residual), Ground Fault (Zero Sequence), Motor Starting/Running and Frequency. This unit requires a power supply input of 110-250VAC.