Water and wastewater industry
The demands from the water and wastewater industry are constantly increasing. Extensive monitoring of the lifting and conveyor systems is essential for process reliability. The KRIWAN protection relays for pumps support your plant system in the acquisition of operationally relevant data and their integration into the system controller.
The individual parameterization of the KRIWAN protection relays for pumps enables them to be used in various areas of application in the water and wastewater industry. The range of KRIWAN protection relays can cover the various requirements for protection and monitoring technology for your pumps.
Take a look into the future of protection relays!
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Our solution: Smart protection relays for pumps
KRIWAN protection relays provide a reliable and user-friendly solution for protecting and monitoring pumps, pump systems and submersible mixers in the water and wastewater industry. An internal memory records measured values and operating data of the pump. This data can be retrieved at any time on site via a digital interface using the INTspector app or worldwide by integrating them into the overall system controller.
Continuous monitoring
It is important for the operator that the pump runs smoothly. Damage and failures are avoided by providing information on the condition of the pump at an early stage and taking countermeasures. With the complete solution from KRIWAN consisting of protection relays, Modbus gateway for networking and the INTspector app for parameterization, the condition of the pump is continuously monitored and automatically switched off before damage or failure occurs. This enables reliable and efficient plant operation.
Why use a KRIWAN protection relay for pumps?
KRIWAN offers a complete solution from the protection relay, to the gateway for networking, to the INTspector app for parameterization: easy to implement, flexible and scalable, enabling you to perform condition monitoring for reliable and efficient system operation. This is the only way to increase the efficiency and service life of machines and systems.
The right protection relay for every pump
To the product pages| Motor temperature The motor temperature is monitored with different sensors or a bimetal. | PTC, Pt100, Pt1000, bimetal | PTC, Pt100, Pt1000, bimetal | PTC, Pt100, Pt1000, bimetal | PTC, Pt100, Pt1000, bimetal | - |
| Temperature 1The temperature (e.g. bearing temperature) is monitored with different sensors. | PTC, Pt100, Pt1000 | PTC, Pt100, Pt1000 | PTC, Pt100, Pt1000 | PTC, Pt100, Pt1000, bimetal | PTC |
| Temperature 2The temperature (e.g. bearing temperature) is monitored with different sensors. | PTC, Pt100, Pt1000 | PTC, Pt100, Pt1000 | PTC, Pt100, Pt1000 | - | bimetal |
| Leakage 1 The leakage is monitored via the measured resistance. If the value falls below or exceeds a parameterized limit value, the pump is automatically switched off. The leakage can also be monitored using a switching input. In the case of pumps, this is usually a float switch that functions as an opener or closer. | Conductance measurement | Conductance measurement, switching input | Conductance measurement, switching input | Conductance measurement | Conductance measurement |
| Leakage 2 The leakage is monitored via the measured resistance. If the value falls below or exceeds a parameterized limit value, the pump is automatically switched off. The leakage can also be monitored using a switching input. In the case of pumps, this is usually a float switch that functions as an opener or closer. | Switching input | Conductance measurement, switching input | Conductance measurement, switching input | - | - |
| Analog input Any 4-20 mA signal from an external sensor can be read in via the analog input. If the value falls below or exceeds an adjustable switching point, the pump is automatically switched off. | 0/4 – 20 mA | 0/4 – 20 mA | - | - | - |
| Phase monitoring The phase monitoring includes the monitoring functions phase sequence, phase failure, phase asymmetry, overvoltage and undervoltage. | Phase failure, phase sequence, phase asymmetry, undervoltage and overvoltage, run detection | Phase failure, phase sequence, phase asymmetry, undervoltage and overvoltage, run detection | Phase failure, phase sequence, phase asymmetry, undervoltage and overvoltage, run detection | Run detection | Run detection |
| Measuring range Measuring range for phase monitoring or running detection. | Phase-phase: 3 AC 20 – 100 Hz, 100 – 690 V | Phase-phase: 3 AC 50 / 60 Hz, 100 – 690 V | Phase-phase: 3 AC 50 / 60 Hz, 100 – 690 V | Phase-neutral conductor: | Phase-neutral conductor: |
| Current monitoring If a current transformer is connected, the current of phase L1 is monitored for overcurrent or undercurrent. When the set limits are reached, the warning or alarm relay switches off. | Current transformer INT185 | - | - | - | - |
| Power measurementWith connected phasse and current transformer, converted active, reactive and apparent power are displayed. The Cosφ monitoring can be set to exceed or falling below and the warning or alarm relay switches off when the adjustable limits are reached. | Apparent, active and reactive power, Cosφ | - | - | - | - |
Relay 1 Relay 1 is an alarm relay or a temperature relay that switches off the pump or motor in the event of a fault. | Alarm | Alarm | Alarm | Temperature | Temperature |
| Relay 2 Relay 2 is a warning relay or a leakage relay that issues warnings. | Warning | Warning | - | Leakage | Leakage |
| Interfaces The diagnostic port (DP) and Modbus RTU (RS485) are availiable as interfaces. The diagnostic port is used to output the diagnostic data and to parameterize the protection relay. The protection relay is integrated into the system control via the Modbus RTU interface. | Diagnostic port (DP) Modbus RTU (RS485) | Diagnostic port (DP) | Diagnostic port (DP) | Diagnostic port (DP) | Diagnostic port (DP) |
| Housing width | 45mm | 45mm | 45mm | 22.5mm | 22.5mm |
| Reset function The reset function is used to reset the interlocked shutdown or the restart delay. A reset can be carried out by means of mains reset, the reset button on the housinge of the protection relay or an external reset. | Network reset | Network reset | Network reset | Reset button/ external reset/ network reset | Reset button/ external reset/ network reset |
KRIWAN protection relays offer a reliable, user-friendly and digital solution for the protection and monitoring of pumps, pump systems and submersible motor agitators. An internal memory records measured values and operating data of the connected sensors. These can be called up via digital interface at any time on site with the KRIWAN INTspector app or worldwide through integration into the higher-level system control. The large number of inputs and outputs can be parameterized individually for each application. For example, the temperature inputs can be selected between PTC, Pt100, Pt1000 and bimetal. If an input is not used, it is deactivated by parameterization.
For the water and wastewater industry, KRIWAN offers the Premium, Extended, Standard, Basic and Basic Ex protection relays, each with 2 different power supplies (AC/DC 24V and AC 100-240V). The variants differ in terms of functionality (see product overview).
All KRIWAN pump protection relays are supplied with a factory setting. These can be found on the respective product page in the download area as a parameter list. The parameterization can be individually adapted to your application during installation and inspection with the help of the KRIWAN INTspector app.
You need a laptop, mobile phone or tablet (Windows 10, Android or iOS) with an installed KRIWAN INTspector app and a KRIWAN USB or Bluetooth gateway to establish the connection between the protection relay and the end device.
In the packaging is the respective protection relay and the brief instructions. With the products INT69 PYF Diagnose and INT69 EXF2 Diagnose, terminating resistors are also included in the scope of delivery.
For quick and easy status indication and troubleshooting, a flashing code is signalled via an LED on the front of the housing of the protective relays. This consists of a cyclic flashing sequence which can be taken from the data sheet. The KRWIAN INTspector app is available for a more detailed view. The diagnosis data provides an overview of the operating behaviour of your pump. Events, operating times, switching cycles and current measured values are displayed and help with detailed analysis on site.
The KRIWAN protection relays can be integrated into your control system via the ModBus RTU protocol. No additional hardware is required for the INT69® PYF PREMIUM, all other devices are connected via an INT600 DM gateway.
Sensors are usually already installed by the manufacturers of motors, pumps, systems, etc. The existing sensors can be connected to the KRIWAN pump protection relay.
We are happy to help you with questions. To do this, simply use the contact form on our homepage and send us a request. Our customer support will get in touch with you.
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