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Pump Protection Relays
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Rhomberg Pump Protection Relays are actually motor protection relays designed for pump applications. Primarily used for submersible (borehole) pump protection, they protect the pump against running dry, jamming of motor, closed valve or no-flow (centrifugal pumps), overcurrent, incorrect phase sequence, phase failure, over and under voltage. They are microprocessor based and are calibrated at the push of a button. (Available in DIN rail format only).
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MP820
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Single Phase Motor/ Pump Protection Relay
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Protection of submersible pumps or single phase motors
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Features
- DIN rail mount.
- Underload sensing by measuring phase angle (eg. Protection against running dry)
- Overload sensing by measuring current amplitude (eg. Protection against blockages or shut valve)
- Unit automatically calibrates for underload and overload detection at the push of a button.
- Calibration reset for easy setting up of motor changeover.
- Direct in-line current sensing for motors up to 1.1kW.
- Direct interface with conventional current transformer for motors>1.1kW.
- Liquid Level Control.
- Adjustable restart timer on underload (ie running dry).
- Fixed start-up delay (3 seconds standard).
- Unit latches in de-energised state on overload fault only.
- LED indication of all fault conditions and all modes of operation.
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Data Sheet
More Info
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MP825
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Single Phase Motor Protection Relay
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Protection of single phase motors
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Features
- DIN rail mount.
- Adjustable underload sensitivity with facility to disable underload monitoring
- Overload sensing by measuring current amplitude (eg. Protection against jamming)
- Unit automatically calibrates for underload and overload detection at the push of a button.
- Calibration reset for easy setting up of motor changeover.
- Direct in-line current sensing for motors up to 1.1kW.
- Direct interface with conventional current transformer for motors>1.1kW.
- Liquid Level Control.
- Fixed start-up delay (3 seconds standard).
- Unit latches in de-energised state on overload fault only.
- LED indication of all fault conditions and all modes of operation.
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Data Sheet
More Info
Order Code
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MP830
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3 Phase Motor/ Pump Protection Relay
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Protection of submersible pumps or AC induction motors
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Features
- DIN rail mount.
- Underload sensing by measuring phase angle (eg. Protection against running dry)
- Overload sensing by measuring current amplitude (eg. Protection against blockages or shut valve)
- Unit automatically calibrates for underload and overload detection at the push of a button.
- Calibration reset for easy setting up of motor changeover.
- Direct in-line current sensing for motors up to 3.75kW.
- Direct interface with conventional current transformer for motors>3.7kW.
- Phase Sequence and phase failure detection.
- Liquid Level Control.
- Adjustable restart timer on underload (ie running dry).
- Fixed start-up delay (3 seconds standard).
- Unit latches in de-energised state on overload fault only.
- LED indication of all fault conditions and all modes of operation.
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Data Sheet
More Info
Order Code
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Product Comparison |
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MP835
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Single Phase Motor Protection Relay
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Protection of AC induction motors
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Features
- DIN rail mount.
- Adjustable underload sensitivity with facility to disable underload monitoring
- Overload sensing by measuring current amplitude (eg. Protection against jamming)
- Unit automatically calibrates for underload and overload detection at the push of a button.
- Calibration reset for easy setting up of motor changeover.
- Direct in-line current sensing for motors up to 3.75kW.
- Direct interface with conventional current transformer for motors>3.7kW.
- Phase Sequence and phase failure detection.
- Liquid Level Control.
- Fixed start-up delay (3 seconds standard).
- Unit latches in de-energised state on overload fault only.
- LED indication of all fault conditions and all modes of operation.
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Data Sheet
More Info
Order Code
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Search |
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