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Monitoring/Protection
relays

Every household, every object and every machine needs a watch relay. There may be several reasons, such as overvoltage, undervoltage, phase failure, asymmetry, frequency, or power factor. It does not matter if it is a voltage or current with a single-phase or three-phase distribution, you will definitely choose from our offer.

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Voltage relays
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Current relays
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Level switches
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Thermostats
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Frequency relays
Voltage monitoring relays with fixed range - HRN3-81 photo

Voltage monitoring relays with fixed range - HRN3-81

The relay is designed to monitor phase loss, sequence and asymmetry in 3-phase network. Product detail
Voltage monitoring relays with selectable range - HRN3-80 photo

Voltage monitoring relays with selectable range - HRN3-80

The relay is designed to monitor undervoltage, phase loss, sequence and asymmetry in 3-phase network. Product detail
Multifunction voltage monitoring relays DC - HRN-36/2 photo

Multifunction voltage monitoring relays DC - HRN-36/2

Used to monitor the size of DC voltage in single-phase circuits Product detail
Multifunction voltage monitoring relays AC/DC - HRN-39/2 photo

Multifunction voltage monitoring relays AC/DC - HRN-39/2

Used to monitor the size of DC or AC voltage in single-phase circuits Product detail
Voltage monitoring relays with selectable range - PMR3-70 photo

Voltage monitoring relays with selectable range - PMR3-70

It is used for monitoring of voltage, phase failure, sequence and asymmetry in 3-phase network. Product detail
Voltage monitoring relays with selectable range - HRN3-70 photo

Voltage monitoring relays with selectable range - HRN3-70

It is used for monitoring of voltage, phase failure, sequence and asymmetry in 3-phase network. Product detail
Multifunction voltage monitoring relays in 1P - AC/DC - PMR1-39/2 photo

Multifunction voltage monitoring relays in 1P - AC/DC - PMR1-39/2

Monitors voltage exceeding the upper voltage level (Umax) and falling below the lower voltage level (Umin) Product detail
Multifunction voltage monitoring relays AC/DC - PMR1-39 photo

Multifunction voltage monitoring relays AC/DC - PMR1-39

It is used to monitor the value of alternating or direct voltage in 1-phase circuits. Product detail
Multifunction voltage monitoring relays DC - PMR1-36/2 photo

Multifunction voltage monitoring relays DC - PMR1-36/2

It is used to monitor the value of direct voltage in 1-phase circuits. Product detail
Multifunction voltage monitoring relays DC - PMR1-36 photo

Multifunction voltage monitoring relays DC - PMR1-36

It is used to monitor the value of direct voltage in 1-phase circuits. Product detail
Multifunction voltage monitoring relays AC/DC - PMR1-31/2 photo

Multifunction voltage monitoring relays AC/DC - PMR1-31/2

It is used to monitor the value of alternating or direct voltage in 1-phase circuits. Product detail
Multifunction voltage monitoring relays AC/DC - PMR1-31 photo

Multifunction voltage monitoring relays AC/DC - PMR1-31

It is used to monitor the value of alternating or direct voltage in 1-phase circuits. Product detail
Multifunction voltage monitoring relays AC/DC- HRN-31/2 photo

Multifunction voltage monitoring relays AC/DC- HRN-31/2

Used to monitor the size of DC or AC voltage in single-phase circuits Product detail
Multifunction voltage monitoring relays AC/DC - HRN-39 photo

Multifunction voltage monitoring relays AC/DC - HRN-39

Used to monitor the size of DC or AC voltage in single-phase circuits Product detail
Multifunction voltage monitoring relays DC - HRN-36 photo

Multifunction voltage monitoring relays DC - HRN-36

Used to monitor the size of DC voltage in single-phase circuits Product detail
Multifunction voltage monitoring relays AC/DC - HRN-32/2 photo

Multifunction voltage monitoring relays AC/DC - HRN-32/2

Used to monitor the size of DC or AC voltage in single-phase circuits Product detail
Multifunction voltage monitoring relays AC/DC - HRN-31 photo

Multifunction voltage monitoring relays AC/DC - HRN-31

Used to monitor the size of DC or AC voltage in single-phase circuits Product detail
Multifunction current monitoring relay in 1P - AC - PRI-34 photo

Multifunction current monitoring relay in 1P - AC - PRI-34

It is used to monitor the value of alternating current in, e.g.: motors, heating cables, illumination and other devices Product detail
Undercurrent monitoring relay in 1P - AC by external CT - PRI-35 photo

Undercurrent monitoring relay in 1P - AC by external CT - PRI-35

Protects the pump motor (submersible pump) against no-load operation with ext. current transformer. The power supply is not galvanically separated from the monitored current terminals. Terminals A2, B2 are internally connected Product detail
Additional signaling HRH-9/S photo

Additional signaling HRH-9/S

Additional signaling to the product HRH-9 Product detail
Universal level switch for monitoring 1 to 6 levels HRH-9 photo

Universal level switch for monitoring 1 to 6 levels HRH-9

The relay is designed to control the level of conductive liquids in wells, sumps, tanks, pools, tankers, reservoirs. Product detail
Multifunction voltage monitoring relay in 3P with LCD display HRN-100 photo

Multifunction voltage monitoring relay in 3P with LCD display HRN-100

Multifunction and in many ways universal monitoring relay which protects devices and equipment connected to a 3-phase network. Product detail
Multifunction level switch for monitoring 1 or 2 levels HRH-8 photo

Multifunction level switch for monitoring 1 or 2 levels HRH-8

For checking one or two levels, or pumping of tanks Product detail
Power factor monitoring relay - COS-2 photo

Power factor monitoring relay - COS-2

Relay monitors phase shift between current and voltage in 3-phase or 1-phase networks Product detail
Voltage monitoring relays in 3P with adjustable levels HRN-57N photo

Voltage monitoring relays in 3P with adjustable levels HRN-57N

It serves to monitor voltage in a switchboard, protection of devices in 3-phase main. Product detail
Voltage monitoring relays in 3P with adjustable levels HRN-57 photo

Voltage monitoring relays in 3P with adjustable levels HRN-57

It serves to monitor voltage in a switchboard, protection of devices in 3-phase main. Product detail
Voltage monitoring relay in 3P with adjustable level Umin HRN-56 photo

Voltage monitoring relay in 3P with adjustable level Umin HRN-56

Relay monitors phase sequence and failure (e.g. control of correct motor winding etc.). Product detail
Voltage monitoring relay in<br> 3P with adjustable levels HRN-54N photo

Voltage monitoring relay in 3P with adjustable levels HRN-54N

Serves to monitor voltage , phase failure and sequence in switchboards, protection of devices Product detail
Voltage monitoring relay HRN-67 in 1P - AC photo

Voltage monitoring relay HRN-67 in 1P - AC

Serves to control supply voltage for appliances sensitive to supply tolerance, protection of the device against under/over voltage Product detail
Voltage monitoring relay HRN-63 in 1P - AC photo

Voltage monitoring relay HRN-63 in 1P - AC

Serves to control supply voltage for appliances sensitive to supply tolerance, protection of the device against under/over voltage Product detail
Current monitoring relay of Imin and Imax in 1P - AC/DC PRI-42 photo

Current monitoring relay of Imin and Imax in 1P - AC/DC PRI-42

Used to monitor overloading / relief (machine, motor, etc.), check consumption, diagnostics on a remote device (burning, short circuit, increased current draw, etc.). Product detail
Frequency (f) monitoring relay HRF-10 photo

Frequency (f) monitoring relay HRF-10

The relay serves to monitor frequency of AC voltage, e.g. in photovoltaic power stations, generators. Product detail
Power factor (cos φ) monitoring relay COS-2 photo

Power factor (cos φ) monitoring relay COS-2

Relay monitors phase shift between current and voltage in 3-phase or 1-phase networks - evaluates COS φ (replacement COS-1). Product detail
Current monitoring relay of Imin and Imax in 1P - AC/DC PRI-41 photo

Current monitoring relay of Imin and Imax in 1P - AC/DC PRI-41

Used to monitor overloading / relief (machine, motor, etc.), check consumption, diagnostics on a remote device (burning, short circuit, increased current draw, etc.). Product detail
Current monitoring relay of Imin or Imax in 3P PRI-53 photo

Current monitoring relay of Imin or Imax in 3P PRI-53

It is intended for monitoring the current in three-phase devices (e.g. cranes, motors, etc.). Product detail
Current monitoring relay of Imax level passing through a hole in 1P - AC PRI-52 photo

Current monitoring relay of Imax level passing through a hole in 1P - AC PRI-52

Monitoring relay PRI-52 serves for monitoring of current level in 1-phase AC circuits Product detail
Current monitoring relay of Imax level in 1P - AC PRI-51 photo

Current monitoring relay of Imax level in 1P - AC PRI-51

Serves for monitoring of heating in rail-switches, heating cables, consumption of one-phase motors, indicates current flow Product detail
Current monitoring relay of Imax level passing through a hole in 1P - AC PRI-32 photo

Current monitoring relay of Imax level passing through a hole in 1P - AC PRI-32

Current transformer is a part of the product. Inside this transformer there is a wire which senses the volume of flowing current. Product detail
Voltage monitoring relay in 3P with adjustable levels HRN-54 photo

Voltage monitoring relay in 3P with adjustable levels HRN-54

Serves to monitor voltage , phase failure and sequence in switchboards, protection of devices Product detail
Voltage monitoring relay for complete control in 3P incl. asymmetry HRN-43N photo

Voltage monitoring relay for complete control in 3P incl. asymmetry HRN-43N

The full-featured monitoring relay is used for 3-phase network control, network monitoring and protection, voltage regulation from a generator or hydropower plant. Product detail
Voltage monitoring relay for complete control in 3P incl. asymmetry HRN-43 photo

Voltage monitoring relay for complete control in 3P incl. asymmetry HRN-43

The full-featured monitoring relay is used for 3-phase network control, network monitoring and protection, voltage regulation from a generator or hydropower plant. Product detail
Voltage monitoring relay in 3P with fixed levels HRN-55N photo

Voltage monitoring relay in 3P with fixed levels HRN-55N

Relay monitors phase sequence and failure ( e.g monitoring of correct motor winding etc.)in 3 phaze main Product detail
Voltage monitoring relay in 3P with fixed levels HRN-55 photo

Voltage monitoring relay in 3P with fixed levels HRN-55

Relay monitors phase sequence and failure ( e.g monitoring of correct motor winding etc.)in 3 phaze main Product detail
Voltage monitoring relay HRN-42 in 1P - AC/DC photo

Voltage monitoring relay HRN-42 in 1P - AC/DC

Monitoring DC / AC 1-phase in 3 ranges. Product detail
Voltage monitoring relay HRN-41 in 1P - AC/DC photo

Voltage monitoring relay HRN-41 in 1P - AC/DC

Monitoring DC and AC voltage in three ranges Product detail
Voltage monitoring relay HRN-37 in 1P - AC photo

Voltage monitoring relay HRN-37 in 1P - AC

Serves to control supply voltage for appliances sensitive to supply tolerance, protection of the device against under/over voltage Product detail
Voltage monitoring relay HRN-35 in 1P - AC photo

Voltage monitoring relay HRN-35 in 1P - AC

Serves to control supply voltage for appliances sensitive to supply tolerance, protection of the device against under/over voltage Product detail
Voltage monitoring relay HRN-33 in 1P - AC photo

Voltage monitoring relay HRN-33 in 1P - AC

Serves to control supply voltage for appliances sensitive to supply tolerance Product detail
Light indicator of voltage in 3P MPS-1 photo

Light indicator of voltage in 3P MPS-1

Used for optical signaling of the voltage level in three phases. Product detail
Set of level switch HRH-5 and contactor VS-425 - HRH-4 photo

Set of level switch HRH-5 and contactor VS-425 - HRH-4

In an easy way it automates operations of pumps depending on level. Product detail
Hygrostat with humidity range 0 to 90% in increased protection RHV-1 photo

Hygrostat with humidity range 0 to 90% in increased protection RHV-1

Single hygrostat is used for regulation of humidity in harsh environments (washdown, greenhouse, refrigeration) Product detail
Hygrothermostat with temperature range 0 to + 60° C and humidity 50 to 90% RHT-1 photo

Hygrothermostat with temperature range 0 to + 60° C and humidity 50 to 90% RHT-1

Hygro-thermostat for temperature and relative humidity monitoring Product detail

Content section

Voltage relays Current relays Level switches Thermostats Frequency relays

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