The PREMIUM protection relay INT69 PYF Diagnose connects pumps, protection functions and the digital world. Simple networking is possible with the help of the integrated Modbus interface. The device monitors the motor temperature, the bearing temperature, leakage, vibration, voltage and current. The integrated power measurement is suitable for a frequency converter. A relay for alarm and warning ensures the necessary operational safety.
| Article number | Power supply |
| 20 A 721 P081 | AC/DC 50/60 Hz 24 V |
| 22 A 721 P081 | AC 50/60 Hz 100 - 240 V |
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The INT69 PYF Diagnose with Modbus interface and power measurement is a universal and versatile protection relay. The following inputs and outputs are available for monitoring electrical components:
| Terminals | Inputs and outputs |
| L/L+, N/L- | Supply voltage |
| T1, T2 | Motor temperature (PTC, Pt100, Pt1000, bimetal, external relay contact) |
| T3, T4 | Temperature 1 (PTC, Pt100, Pt1000) |
| T5, T6 | Temperature 2 (PTC, Pt100, Pt1000) |
| E+, E- | Leakage (resistance measurement) |
| SC1, SC2 | Switching input (float switch, external reset) |
| I+, I- | Analog input 0/4-20mA |
| FE | Functional ground |
| L1, L2, L3 | Phase monitoring with phase sequence, phase failure, phase asymmetry, undervoltage and overvoltage |
| S1, S2 | Current transformer INT185 |
| 11, 14, 12 | Alarm relay |
| 21, 24, 22 | Warning relay |
| COM, D1, D0, COM | RS485, Modbus RTU |
Cosφ, service interval, switching frequency, short circuit and interruption of the sensors can also be monitored. Consumed apparent, active and reactive power is determined and in the protection relay and active and reactive energy is counted. Parametrization enables protection functions and response settings to be adapted flexibly to suit the application.
The INT69 PYF Diagnose saves operating and fault data in a non-volatile memory. This data can be read out and evaluated for diagnostic purposes. Parameterization and diagnostics are possible via the built-in diagnostic port (DP) using the INTspector app and with separately available accessories. This protection relay device is used primarily for the protection of pumps and agitators. The INT185 current transformer is also required for the full range of functions.
Supply voltage 22 A 721 P081 20 A 721 P081 |
AC 50/60 Hz 100-240 V ±10 % 9 VA AC/DC 50/60 Hz 24 V ±20 % 7 VA |
| Permissible ambient temperature TA | -30...+70 °C |
| Permissible humidity | 0…95 % r.h., non-condensing |
| Maximum usage height | 2000 m |
Temperature measuring circuit bimetal/external relay contact – Type – Contact suitable for – Max. line length |
for an NC contact DC 24 V, 20 mA 100 m |
PTC temperature measuring circuit – Type – R25, total – RTriggering, static – RReset – Short circuit monitoring – Break monitoring – Max. line length |
1-9 PTC sensors according to DIN 44081, DIN 44082 in series <1.8 kΩ 4.5 kΩ ±20 % 2.75 kΩ ±20 % <20 Ω >20 kΩ 100 m |
Pt100 temperature measuring circuit – Measuring range – Resolution – Accuracy – Short circuit monitoring – Break monitoring – Max. line length |
-50... +300 °C 1 K 5 % of the ohmic value <20 Ω >400 Ω 100 m |
Pt100 temperature measuring circuit – Measuring range – Resolution – Accuracy – Short circuit monitoring – Break monitoring – Max. line length |
-50... +300 °C 1 K 5 % of the ohmic value <20 Ω >400 Ω 100 m |
Leakage measuring circuit – Type – Measuring range – Resolution – Accuracy – Max. line length |
Resistance measurement between electrode pairs 10 k to 1 MΩ 1 kΩ ±(1 kΩ + 10 % of the MW) 100 m |
Switching input – Type – Contact suitable for – Max. line length |
For a floating NC or NO contact (e.g., reset button) DC 24 V, 20 mA 100 m |
Analog input – Type – Applied voltage – Measuring range – Resolution – Accuracy – Current limitation – Max. line length |
0…20 mA / 4…20 mA current signal DC 24 V +5 % / -25 % 0…20 mA 0.1 mA ±2.5 % of the MW 30 mA, short-circuit-proof 30 m |
Phase measurement – Operation with FC – Measuring range, phase-phase – Resolution – Clock frequency range – Typical clock frequency – Precision, sinus operation – Precision, FC operation – Max. line length |
Suitable AC 20…100 Hz, 100…690 VAC ±10% 1 V 2…16 kHz 8 kHz ±(1 V + 2.5 % vom MW) ±(1 V + 5 % vom MW) 3 m |
Frequency measurement – Resolution – Accuracy |
1 Hz ±1 Hz |
Current measurement – Type – Load – Measuring range with 02D187
– Resolution – Accuracy
– Max. line length |
For a current transformer R=75 Ω, Imax =40 mA 1~ AC 20…100 Hz ±10 % 5...100 A 0.5...10 A 0.01 A
±2.5 % of the MW ±5 % of the MW 3 m |
Cosφ measurement – Measuring range – Resolution |
0…1 0.01 |
Power measurement with 02 D187 – Measuring range – Resolution – Precision (FC operation)
|
AC 20…100 Hz ±10 %, 120 kVA 1 VA/W/var
±10 % at cosφ > 0.4 ±10 % |
Energy meter – Measuring range – Resolution |
Approx. 43 GWh/Gvarh 0.01 kWh/kvarh |
Modbus – Protocol – Address range – Suitable cable – Security – Specification – Interface – Baud rate – Parity – Stop bit – Terminal resistance |
Modbus RTU (TwoWire) 1…247 Twisted pair, e.g. cable LiYCY (TP) 2x2x0.25 mm2 Electrically isolated Modbus application protocol specification of Modbus-IDA RS485 9.6 k, 19.2 k, 38.4 k or 57.6 k Even, odd or none 1 or 2 No internal terminal resistance.150 ohm required between D0-D1, see scope of supply |
| Interface | Diagnostic port (DP) |
Reset of lock or restart delay – Option 1 – Option 2 |
Network reset >5 s External reset at switching input. Only possible once any errors have been rectified |
Alarm/warning relay – Contact
– Mechanical service life |
240 V AC, 2.5 24 V AC/DC, 20 mA Approx. 1 million cycles |
| Degree of protection as per EN 60529 | IP20 |
Connection type – General – Modbus |
Tension spring connection (push-in) 0.2-2.5 mm2 Screw terminal 0.2-2.5 mm2 |
| Housing material | PA 66 GF 30 |
| Fixing | Control cabinet housing (basic grid 45 mm), clippable on to 35 mm standard rail as per EN60715 |
| Dimensions | See dimensions in mm |
Weight – 22 A 721 P081 – 20 A 721 P081 |
315g 310g |
| Test regulations | EN 61000-6-2, EN 61000-6-3, EN 61010-1 Overvoltage category III Degree of pollution 2 |
| Approval | UL File Nr. E473026 cURus |
Compare our products and find the right protection relay for pumps.
| INT69 PYF Diagnose Premium | INT69 YF Diagnose EXTENDED | INT69 YF Diagnose STANDARD | INT69 F Diagnose BASIC | INT69 EXF2 Diagnose BASIC EX | |
| Motor temperature | PTC, Pt100, Pt1000, bimetal | PTC, Pt100, Pt1000, bimetal | PTC, Pt100, Pt1000, bimetal | PTC, Pt100, Pt1000, bimetal | - |
| Temperature 1 | PTC, Pt100, Pt1000 | PTC, Pt100, Pt1000 | PTC, Pt100, Pt1000 | PTC, Pt100, Pt1000, bimetal | PTC |
| Temperature 2 | PTC, Pt100, Pt1000 | PTC, Pt100, Pt1000 | PTC, Pt100, Pt1000 | - | Bimetal |
| Leakage 1 | Conductance measurement | Conductance measurement, switching input | Conductance measurement, switching input | Conductance measurement | Conductance measurement |
| Leakage 2 | Switching input | Conductance measurement, switching input | Conductance measurement, switching input | - | - |
| Analog input | 0/4 – 20 mA | 0/4 – 20 mA | - | - | - |
| Phase monitoring | Phase failure, phase sequence, phase asymmetry, undervoltage and overvoltag | Phase failure, phase sequence, phase asymmetry, undervoltage and overvoltag | Phase failure, phase sequence, phase asymmetry, undervoltage and overvoltag | Run detection | Run detection |
Current monitoring | Current transformer | - | - | - | - |
| Power measurement | Apparent, active and reactive power, Cosφ | - | - | - | - |
| Relay 1 | Alarm | Alarm | Alarm | Temperature | Temperature |
| Relay 2 | Warning | Warning | - | Leakage | Leakage |
| 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 | Network reset | Network reset | Network reset | Reset button/ external reset/ network reset | Reset button/ external reset/ network reset |
Supply voltage AC 50 / 60 Hz 100 – 240V | 22 A 721 P081 | 22 A 701 P081 | 22 A 700 P081 | 22 A 712 P081 | 22 A 713 P081 |
Supply voltage AC / DC 50 / 60 Hz 24V | 20 A 721 P081 | 20 A 701 P081 | 20 A 700 P081 | 20 A 712 P081 | 20 A 713 P081 |
Look at the monitoring modules, the options and examples of use of our pump protection relay.
| Monitoring module | Options | Example of use | |
| 1x | Motor temperature | PTC, Pt100, Pt1000, Bimetal, external relay contact | Motor temperature sensor, NC contact of an external protection relay |
| 1x | Temperature 1 | PTC, Pt100, Pt1000 | Bearing temperature, winding temperature, mechanical seal, etc. |
| 1x | Temperature 2 | PTC, Pt100, Pt1000 | Bearing temperature, winding temperature, mechanical seal, etc. |
| 1x | Leakage 1 | Resistance below, exceed resistance | Resistance measurement between leakage electrodes, resistance measurement from leakage electrode to pump housing |
| 1x | Switching input | Normally closed, normally open, reset | Float switch, reset button |
| 1x | Analogue input | 0 - 20 mA, 4 - 20 mA | 2-wire sensors without own power supply: vibration sensor, pressure sensor, etc. |
| 1x | Phase monitoring | Phase sequence, phase failure, phase asymmetry, undervoltage, overvoltage, run detection | Measuring range phase-phase |
| 1x | Current monitoring | Falling below current, Exceed current | Detect overload (e.g. clogging of a pump) |
| 1x | Power measurement | Apparent power, active power, reactive power, cosφ | Detect underload (e.g. dry run of a pump), energy meter |
| 1x | Relays 1 | Alarm | Shutdown when exceeding limit value or when falling below limit value (e.g. motor temperature, temperature 1, temperature 2, leakage 1, etc.) |
| 1x | Relays 2 | Warning | Warning when exceeding limit value or when falling below limit value (e.g. motor temperature, temperature 1, temperature 2, leakage, etc.) |
| 1x | Interfaces | Diagnostic Port (DP) | Connection of a USB gateway (INT600 DU Gateway) or a Bluetooth gateway (INT600 DB Gateway) to use the INTspector App |
| Modbus RTU (RS485) | Retrieval of parameters and integration into the system control | ||
| 1x | Reset function | Mains reset, external reset | Resetting the interlocked shutdown as soon as there is no longer an error |
Brief instructions
Parameter table
Tender specification
Find out more about the functions and advantages of our smart protective relays.
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The protection relay connects pump, protection function and digital world. With the help of the integrated Modbus (RTU) interface, simple networking is possible. The protection relay monitors temperatures (3x inputs for PTC, Pt100, Pt1000 or bimetal), leakage (conductance measurement), analog input (0/4-20mA), voltage and current. The power measurement is suitable for operation with frequency converters. A relay each for alarm and warning provides the necessary operational safety.
You need an end device, such as a laptop, cell phone or tablet with the KRIWAN INTspector App installed and a KRIWAN USB or Bluetooth gateway to establish the connection between INT69 PYF Diagnose and end device.
For quick and easy status indication and troubleshooting, a blink code is output via an LED on the front of the protective relay housing. This consists of a cyclic flashing sequence which can be looked up in the data sheet.
For a more detailed view, the KRWIAN INTspector App is available. The diagnostic 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.
All events such as warnings, errors or messages are stored in a non-volatile internal memory and can be looked at via the INTspector App. The event memory contains the last 100 events with time and date. The last 10 events in each case are additionally recorded with extended data for all sensor inputs. There are also counters for all events.
Currents and voltages can be measured in the measuring range 20 - 100 Hz. The active, reactive and apparent power as well as the power factor cos ϕ are thus determined and output in the INT69 PYF diagnostic. In addition, counters for the drawn active and reactive energy are included in the integrated memory of the INT69 PYF Diagnose. This allows the energy consumption to be displayed transparently.
For three-phase motors, a symmetry of the motor windings is assumed. The total power on the three-phase motor is made up of three string powers. The INT69 PYF Diagnose determines the power in string L1 by means of measured current, voltage and phase angle. The total power is then determined from the ratio of the measured three phase voltages and the determined power of phase L1.
Yes. For this purpose, a measuring tap (see also circuit diagram in the data sheet) of the outer conductor of the AC motor is made to the L1 terminal of the INT69 PYF Diagnose. It is also important to connect the FE terminal. The operating mode of the phase monitoring must then be changed to "monitoring of one phase" in the parameterization.
This function can be used to connect an auxiliary contact (NC contact) of another relay required in the application to the INT69 PYF Diagnose. That way, the switching behaviour can be additionally recorded in the internal memory and integrated into a higher-level system control via Modbus. For example, this can be an ATEX certified relay for the motor temperature.
Submersible pumps and agitators, for example, are often already equipped by the manufacturer with moisture electrodes that can be monitored with the INT69 PYF Diagnose at E-, E+. These have the function of monitoring against penetrating medium or dry running. For this purpose, the resistance (conductance) between the two electrodes is measured. Depending on the application, the operating mode must be set to resistance exceeding or resistance falling below.
Depending on the application, a switching contact (normally closed, normally open) may be present on the monitored machine. For example, a float switch (normally closed contact) is often used for submersible motor pumps and can be monitored with switching input SC1, SC2 of the INT69 PYF Diagnose. Furthermore, this input can also be used as an external reset button (normally open contact). The according operating mode (normally closed contact, normally open contact, reset) must be set in the parameterization for that.
There are several options, such as disconnecting the supply voltage >5s of the INT69 PYF Diagnose (mains reset). Or by connecting an external reset button (normally open contact) to the switching input SC1, SC2. The protection relay can only be switched back on after an interlocked switch-off after a reset has been done and if there is no longer an error.
The INT69 PYF Diagnose has an alarm and a warning relay. If an error or warning is detected, the alarm or warning relay drops out. For each input, it is possible to parameterize the warning, setpoint and switch-off values, tripping and restart delays and an interlocked switch-off. In addition, the warning relay can be activated or deactivated in the parameterization for each input. The alarm relay is always active as soon as an input is actively monitored. The two relays operate according to the closed-circuit current principle.
The INT69 PYF Diagnose offers an integrated Modbus RTU interface (RTU). This can be used for communication with the control system. An additional Modbus gateway (e.g. INT600 DM Gateway) is not absolutely necessary here.
The packaging contains the respective protection relay (depending on the voltage variant AC/DC 24V or AC 100-240V) and the brief instructions. In addition, terminating resistors for Modbus communication are included in the scope of delivery. The INT185 Current Transformer with a measuring range of up to 100A and up to 250A is not included in the scope of delivery and must be ordered separately.
All KRIWAN pump protection relays are delivered with a factory setting. The one for the INT69 PYF Diagnose can be found on the product page in the download area as a parameter list. The parameterization can be individually adapted to your application during installation and commissioning using the KRIWAN INTspector App.
We are happy to help you with your questions. Simply use the contact form on our homepage and send us a request. Our customer support will get in touch with you.
Find the right accessories for our products.
Connect your INT69 PYF Diagnose PREMIUM with the INT185 Current transformer
Connect your KRIWAN diagnostic devices via Modbus gateway
Connect your KRIWAN diagnostic devices to the INTspector app via USB gateway
Connect your KRIWAN diagnostic devices to the INTspector app via Bluetooth gateway
For the right connection between your protection device and the gateway
For parameterizing your device and reading out all important data
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