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Voltage control relays
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Voltage control relays

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12v electronic voltage tester

12v electronic voltage tester

Tomasz Korecki Przedsiębiorstwo Wielobranżowe Sójka
€6.41 +VAT
PLN 29.57
  • EAN: 8711252262956
  • Manufacturer: AMiO
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Tomasz Korecki Przedsiębiorstwo Wielobranżowe Sójka
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PoE / PoE voltage presence tester + 802.3af / 802.3at tester

PoE / PoE voltage presence tester + 802.3af / 802.3at tester

Tomasz Korecki Przedsiębiorstwo Wielobranżowe Sójka
€21.32 +VAT
PLN 98.36
  • EAN: 0766623780131
  • Manufacturer: INTELLINET NETWORK SOLUTIONS
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Tomasz Korecki Przedsiębiorstwo Wielobranżowe Sójka
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10543 Electric tester with diode, 250V voltage indicator, Proline

10543 Electric tester with diode, 250V voltage indicator, Proline

Tomasz Korecki Przedsiębiorstwo Wielobranżowe Sójka
€3.63 +VAT
PLN 16.76
  • EAN: 5903755105431
  • Manufacturer: Proline
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Tomasz Korecki Przedsiębiorstwo Wielobranżowe Sójka
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Sampler, voltage tester 12-250V, 50-500Hz

Sampler, voltage tester 12-250V, 50-500Hz

Tomasz Korecki Przedsiębiorstwo Wielobranżowe Sójka
€3.58 +VAT
PLN 16.50
  • EAN: 5901752485228
  • Manufacturer: ORNO
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Tomasz Korecki Przedsiębiorstwo Wielobranżowe Sójka
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CC61516 Electronic voltage tester 12V

CC61516 Electronic voltage tester 12V

Tomasz Korecki Przedsiębiorstwo Wielobranżowe Sójka
€8.27 +VAT
PLN 38.17
  • EAN: 5907476615163
  • Manufacturer: CarCommerce
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Tomasz Korecki Przedsiębiorstwo Wielobranżowe Sójka
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10582 Electrical tester, voltage indicator 250V, 190mm

10582 Electrical tester, voltage indicator 250V, 190mm

Tomasz Korecki Przedsiębiorstwo Wielobranżowe Sójka
€1.63 +VAT
PLN 7.50
  • EAN: 5903755105820
  • Manufacturer: PRO
Supplier
Tomasz Korecki Przedsiębiorstwo Wielobranżowe Sójka
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SINGLE-POLE VOLTAGE TESTER, ON BLISTER 0.5 * 3.0 * 70MM

SINGLE-POLE VOLTAGE TESTER, ON BLISTER 0.5 * 3.0 * 70MM

Tomasz Korecki Przedsiębiorstwo Wielobranżowe Sójka
€13.84 +VAT
PLN 63.84
  • EAN: 4013288181664
  • Manufacturer: WERA
Supplier
Tomasz Korecki Przedsiębiorstwo Wielobranżowe Sójka
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01722 Voltage tester 6-24V

01722 Voltage tester 6-24V

Tomasz Korecki Przedsiębiorstwo Wielobranżowe Sójka
€1.93 +VAT
PLN 8.91
  • EAN: 5903293017227
  • Manufacturer: AMiO
Supplier
Tomasz Korecki Przedsiębiorstwo Wielobranżowe Sójka
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Sampler, voltage tester 100-250V, 190 mm

Sampler, voltage tester 100-250V, 190 mm

Tomasz Korecki Przedsiębiorstwo Wielobranżowe Sójka
€1.86 +VAT
PLN 8.58
  • EAN: 5901752485242
  • Manufacturer: ORNO
Supplier
Tomasz Korecki Przedsiębiorstwo Wielobranżowe Sójka
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01036 Voltage tester 6-24V metal, needle tester

01036 Voltage tester 6-24V metal, needle tester

Tomasz Korecki Przedsiębiorstwo Wielobranżowe Sójka
€3.31 +VAT
PLN 15.28
  • EAN: 5903293010365
  • Manufacturer: AMiO
Supplier
Tomasz Korecki Przedsiębiorstwo Wielobranżowe Sójka
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Sampler, voltage tester 100-250V, 140 mm

Sampler, voltage tester 100-250V, 140 mm

Tomasz Korecki Przedsiębiorstwo Wielobranżowe Sójka
€1.71 +VAT
PLN 7.90
  • EAN: 5901752485235
  • Manufacturer: ORNO
Supplier
Tomasz Korecki Przedsiębiorstwo Wielobranżowe Sójka
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10581 Electrical tester, voltage indicator 250V, 140mm, neon lamp

10581 Electrical tester, voltage indicator 250V, 140mm, neon lamp

Tomasz Korecki Przedsiębiorstwo Wielobranżowe Sójka
€1.46 +VAT
PLN 6.75
  • EAN: 5903755105813
  • Manufacturer: PRO
Supplier
Tomasz Korecki Przedsiębiorstwo Wielobranżowe Sójka
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Voltage relay CP - 710 1-phase

Voltage relay CP - 710 1-phase

HEMPIS Sp. z o.o.
€21.57 +VAT
PLN 99.50
  • EAN: 5908312597100
  • Manufacturer: F&F FILIPOWSKI SPÓŁKA JAWNA
Supplier
HEMPIS Sp. z o.o.
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Voltage monitoring relay 3-phase 2P 280-520V AC EMD-FL-3V-400 2866064

Voltage monitoring relay 3-phase 2P 280-520V AC EMD-FL-3V-400 2866064

TT Partner Artur Krupa
€215.29 +VAT
PLN 993.34
  • EAN: 4017918975029
  • Manufacturer: phoenix contact
Supplier
TT Partner Artur Krupa
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Voltage relay, 1-phase 230V AC PNM-10 EXT10000103

Voltage relay, 1-phase 230V AC PNM-10 EXT10000103

TT Partner Artur Krupa
€17.24 +VAT
PLN 79.56
  • EAN: 5903669021865
  • Manufacturer: zamel
Supplier
TT Partner Artur Krupa
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Relay P16 3.4- 4.6A therm.      (2129-13 0022)

Relay P16 3.4- 4.6A therm. (2129-13 0022)

HEMPIS Sp. z o.o.
€1.06 +VAT
PLN 4.88
  • EAN: 2000000054384
  • Manufacturer: LEGRAND POLSKA Sp. z o.o.
Supplier
HEMPIS Sp. z o.o.
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Voltage control relay 1-phase programmable 1Z 16A 150-450V AC LED display CP-721

Voltage control relay 1-phase programmable 1Z 16A 150-450V AC LED display CP-721

TT Partner Artur Krupa
€38.77 +VAT
PLN 178.88
  • EAN: 5908312594932
  • Manufacturer: f&f
Supplier
TT Partner Artur Krupa
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Phase sequence, loss and unbalance relay 10A 1NO 4sec 55V CKF-B

Phase sequence, loss and unbalance relay 10A 1NO 4sec 55V CKF-B

TT Partner Artur Krupa
€14.97 +VAT
PLN 69.06
  • EAN: 5908312593058
  • Manufacturer: f&f
Supplier
TT Partner Artur Krupa
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Voltage free bistable relay 12-230V AC / DC

Voltage free bistable relay 12-230V AC / DC

HEMPIS Sp. z o.o.
€16.77 +VAT
PLN 77.38
  • Manufacturer: ZAMEL SPÓŁKA Z OGRANICZONĄ ODPOWIEDZIALNOŚCIĄ
Supplier
HEMPIS Sp. z o.o.
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Relay P16 0.5- 0.7A therm.      (2129-03 0022)

Relay P16 0.5- 0.7A therm. (2129-03 0022)

HEMPIS Sp. z o.o.
€0.72 +VAT
PLN 3.34
  • EAN: 2000000054346
  • Manufacturer: LEGRAND POLSKA Sp. z o.o.
Supplier
HEMPIS Sp. z o.o.
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Voltage monitoring relays

Relays are one of the most widely used automation components with many applications. First of all, electromagnetic relays are known, although voltage control relays can also be used. They are also called monitoring relays.

Voltage control relays: characteristics

Voltage monitoring relays have many applications. Among them, the main one is three-phase electrical installation protection which is effective. They are considered universal because they are used in all types of devices. They are found, for example, in high HV and medium MV switchgears. Voltage relays can be used in power protection automatics systems. They prevent the grounding of the live distribution bay. Then each contactor works as it should. Relays of this type can also be found in low-voltage switchgear and control devices. Most often, relays have three operating modes:

  • undervoltage with or without error memory,

  • overvoltage with or without error memory,

  • in band with or without error memory.

Then they can also work as single-phase receiver protection detecting voltage drop immediately. Regardless of the operating mode, phase failure and phase rotation are also monitored. The selection of the operating modes and the range of permissible voltages is made through switches and regulators located on the front panel of the relay. Thanks to the Umin and Umaks regulators it is possible to set the thresholds for the overvoltage and undervoltage release. This in turn translates into flawless Umin supervision and Umaks supervision, based on the best parameters. Voltage monitoring relays are excellent at supervising network parameters that support three-phase machines. It is possible to, for example, supervise the motor overload, supervise the pump overload, or state a condition such as incorrect phase sequence - always quickly detected and preventing the negative effects of possible failures. Signals from all relays inform about faults in the network, which allows, for example, to stop the production line in a timely manner or alert employees in a given plant about irregularities.

Voltage monitoring relays: important parameters

When analyzing voltage control relays, important parameters should be taken into account: type of electrical connection, 1-phase undervoltage control, 1-phase overvoltage control, 1-phase hysteresis function, DC undervoltage control, DC hysteresis function, control voltage type, number of break contacts, number of changeover contacts, depth, rated control voltage, operating voltage setting value from, maximum allowed time delay when energizing, use of detachable terminals, 3-phase undervoltage control, 3-phase overvoltage control, 3-phase hysteresis function, DC overvoltage control, type of measured voltage, maximum allowable time delay at power failure, number of make contacts, height, setting value of make voltage to, width. It is on this basis that the appropriate relays are selected for the intended use. Certainly, mains voltage asymmetry as well as other errors will be immediately indicated.

Voltage relays are used to disconnect the load of a single-phase installation in the event of voltage fluctuations in the network and to automatically reconnect after restoring the appropriate parameters. In four independent modes, the voltage relays additionally play the role of: minimum voltage control relay, maximum voltage control relay and time relay with activation delay.

By familiarizing yourself with the individual options, you will be able to match the right device without much problem.