Monitoring Relays

Monitoring relays are a type of relay that trips a circuit breaker when a fault is detected. A relay is an electrically controlled switch that is used to turn the power on or off in a circuit. 




Monitoring relays are more sophisticated than regular relays, as they have adjustable operating conditions, whereas normal relays switch according to a fixed threshold. They measure a given parameter, such as voltage or temperature, and will trip a circuit breaker when the parameter gets too high or low. 




What are monitoring relays used for?


Monitoring relays have a wide range of uses, depending largely on the factor being monitored. For example, they can protect against overcurrent if measuring current, or they can detect an abnormally low frequency if frequency is being measured.




Types of monitoring relay


The main way in which monitoring relays differ is the function that they measure. This can be a number of things, including:



  • voltage

  • current

  • temperature

  • frequency


The factor that you need to measure will decide which monitoring relay you choose.


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กำลังดูสินค้า 1 - 20 รายการจาก 663 รายการ / Viewing 1 - 20 of 663 products
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รายละเอียดสินค้า / Description ราคา / Price Monitoring Application Supply Voltage Contact Configuration Voltage Sensitivity Electrical Phase Voltage Sensing Range Current Sensitivity Minimum Current Sensed Maximum Current Sensed Phase Sensitivity Time Delay Temperature Sensitivity Temperature Sensing Range Frequency Sensing Range
RS Stock No. 102-6131
Brand :RS PRO
THB1,956.39
Each
Units
Voltage 230 V ac SPDT Overvoltage, Undervoltage 1 173 → 218 (Undervoltage) V, 242 → 288 (Overvoltage) V - - - - 0.2 → 10 s - - 48 → 63 Hz
RS Stock No. 102-6130
Brand :RS PRO
THB1,618.30
Each
Units
Voltage 12 → 24 V dc SPDT Undervoltage 1 12 → 24 V dc - - - - 0 → 30 s - - -
RS Stock No. 102-6133
Brand :RS PRO
THB3,720.07
Each
Units
Voltage 24 → 230 V ac/dc SPDT Overvoltage, Undervoltage 1 50 → 500 V - - - - 0.1 → 30 s - - 48 → 63 Hz
RS Stock No. 102-6134
Brand :RS PRO
THB3,281.38
Each
Units
Current 24 → 230 V ac/dc SPDT - 1 - Overcurrent, Undercurrent 1A 10A - 0.1 → 30 s - - 48 → 63 Hz
RS Stock No. 102-6135
Brand :RS PRO
THB1,779.03
Each
Units
Phase, Voltage 280 → 520 V ac SPDT Undervoltage 3 Maximum of 280 V - - - Phase Failure, Phase Sequence 100 ms - - 48 → 63 Hz
RS Stock No. 102-6137
Brand :RS PRO
THB3,065.59
Each
Units
Phase, Voltage 400 V ac SPDT Overvoltage, Undervoltage 3 300 → 380 (Undervoltage) V, 420 → 500 (Overvoltage) V - - - Phase Failure, Phase Sequence 0.2 → 10 s - - 48 → 63 Hz
RS Stock No. 102-6136
Brand :RS PRO
THB1,909.84
Each
Units
Phase, Voltage 280 → 520 V ac SPDT Undervoltage 3 300 → 500 (Undervoltage) V - - - Phase Failure, Phase Sequence 0.2 → 10 s - - 48 → 63 Hz
RS Stock No. 124-0184
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.RM22TR33
THB4,325.43
Each
Units
Phase, Voltage 304 → 576 V ac DPDT Overvoltage, Undervoltage 3 380 → 480 V ac - - - Phase Failure, Phase Sequence 0.1 → 30 s - - 50 → 60 Hz
RS Stock No. 850-5411
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.LBVR/A 12-24VDC
THB1,861.57
Each
Units
Voltage 8 → 30 V dc SPDT Undervoltage - 12 → 24 V dc - - - - 0 → 30 s - - -
RS Stock No. 240-8939
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.BA9043 3AC50-400Hz 230/400V
Brand :Dold
THB7,540.85
Each
Units
Voltage 230/400 V ac DPDT Undervoltage - - - - - - - - - -
RS Stock No. 518-7297
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.3UG4513-1BR20
Brand :Siemens
THB4,812.04
Each
Units
Phase, Voltage 160 → 690 V ac DPDT Undervoltage 3 160 → 690 V ac - - - Phase Failure, Phase Imbalance, Phase Sequence 0.1 → 20 s - - -
RS Stock No. 123-9750
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.G2PM400VSY20 24-240VAC/DC
Brand :Tele
THB5,685.15
Each
Units
Phase, Voltage 12 → 400 V ac, 24 V dc DPDT Undervoltage 3 230 → 400 V - - - Phase Failure, Phase Sequence 0.1 → 10 s - - -
RS Stock No. 775-7946
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.1SVR730830R0300
Brand :ABB
THB6,227.81
Each
Units
Voltage 24 → 240 V ac/dc SPDT Overvoltage, Undervoltage 1 3 → 30 V, 30 → 300 V, 6 → 60 V, 60 → 600 V - - - - - - - -
RS Stock No. 518-7174
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.3UG4615-1CR20
Brand :Siemens
THB6,696.20
Each
Units
Phase, Voltage 160 → 690 V ac DPDT Overvoltage, Undervoltage 3 160 → 690 V ac - - - Phase Failure, Phase Sequence 0.1 → 20 s - - -
RS Stock No. 240-8844
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.BD5936.17 AC50/60Hz 230V
Brand :Dold
THB10,676.35
Each
Units
Standstill 230 V ac DPDT - - - - - - - - - - -
RS Stock No. 857-7662
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.DPA51CM44
Brand :Carlo Gavazzi
THB7,451.86
Each
Units
Phase 208 → 480 V ac SPDT - 3 177 → 550 V ac - - - Phase Loss, Phase Sequence - - - -
RS Stock No. 775-7955
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.1SVR730830R0400
Brand :ABB
THB8,396.09
Each
Units
Voltage 24 → 240 V ac/dc DPDT Overvoltage, Undervoltage 1 3 → 30 V, 30 → 300 V, 6 → 60 V, 60 → 600 V - - - - 0 s, 0.1 → 30 s - - -
RS Stock No. 518-7124
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.3UG4621-1AW30
Brand :Siemens
THB5,036.69
Each
Units
Current 24 → 240 V ac/dc SPDT - 1 - Overcurrent, Undercurrent 3mA 500mA - 0.1 → 20 s - - -
RS Stock No. 819-3267
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.K8AKPM2380480VAC
Brand :Omron
THB4,617.14
Each
Units
Phase 220 → 480 V ac SPDT - 3 - - - - Overvoltage, Phase Loss, Phase Sequence, Undervoltage 0.1 → 30 s - - -
RS Stock No. 772-1215
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.5SV8000-6KK
Brand :Siemens
THB11,021.94
Each
Units
Current 230 V ac - - - - Residual 30mA 5A - 0.02 → 5 s - - -
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