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  Monitoring relays  (1,015 offers of 5,373,564 product items)

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Dold Phase Monitoring Relay, 3 Phase, SPDT, DIN Rail / 3277679 (2 offers) 
IK9179 three-phase monitor and IK9178 display. Monitoring of three-phase systems for direction of rotation No auxiliary voltage LED display lights up when a clockwise rotation field is detected 17....
DOLD
IK9179.11 3AC50/60Hz 400V
from £ 72.32*
per piece
 
 piece
Module: voltage monitoring relay; for DIN rail mounting; DPDT (1 offer) 
Manufacturer: LOVATO ELECTRIC Mounting: for DIN rail mounting Operating temperature: -20...60°C Kind of output 1: DPDT Power supply: from tested wiring system IP rating: IP20 at terminal side Leads...
LOVATO Electric
PMV80NA600
from £ 281.23*
per piece
 
 piece
Dold Phase Monitoring Relay, 3 Phase, DIN Rail / 3586917 (1 offer) 
IK9169 phase monitor, IK9168 phase monitor display. Detection of phase failure in three-phase systems Single-phase connection also an option Rest current principle Adjustable phase sequence LED dis...
DOLD
IK9168 3AC50/60Hz 230/400V
£ 52.708*
per piece
 
 piece
Module: voltage monitoring relay; for DIN rail mounting; DPDT (1 offer) 
Manufacturer: WEIDMÜLLER Mounting: for DIN rail mounting Operating temperature: -25...60°C Kind of output 1: DPDT Power supply: from tested wiring system IP rating: IP20 Leads: screw terminals Body...
Weidmüller
ACT20P-VMR-3PH-ILP-H
from £ 103.81*
per piece
 
 piece
Dold Phase Monitoring Relay, 3 Phase, DIN Rail / 3586951 (1 offer) 
IK9179 three-phase monitor and IK9178 display. Monitoring of three-phase systems for direction of rotation No auxiliary voltage LED display lights up when a clockwise rotation field is detected 17....
DOLD
IK9178 3AC50/60Hz 400V
£ 52.837*
per piece
 
 piece
Dold Phase Monitoring Relay, 3 Phase, DPDT, DIN Rail / 2409027 (1 offer) 
Fuse monitor, IL9075/001. Recognises fuse failures in three-phase networks up to 440 V Failure notification even with loads switched off Usable for all types and sizes of fuses Independent of rotat...
DOLD
IL9075.12/001 AC50-400Hz 400V
£ 147.382*
per piece
 
 piece
Module: voltage monitoring relay; for DIN rail mounting; DPDT (1 offer) 
Manufacturer: F&F Mounting: for DIN rail mounting Operating temperature: -25...40°C Kind of output 1: DPDT Power supply: from tested wiring system IP rating: IP20 Leads: screw terminals Type of mod...
F&F
CKF-318-TRMS
from £ 42.19*
per piece
 
 piece
Dold Phase, Voltage Monitoring Relay, 3 Phase, DPDT, DIN Rail / 2408967 (2 offers) 
Phase monitor, BD9080. Multifunctional device for monitoring three-phase networks for undervoltage / overvoltage. Phase sequence asymmetry, mains failure (in accordance with IEC 255, VDE 0435 part ...
DOLD
BD9080.12 3AC400V UH=AC230V
from £ 322.09*
per piece
 
 piece
Dold Phase Monitoring Relay, 3 Phase, DPDT, DIN Rail / 4650671 (1 offer) 
IEC/EN 60 255, DIN VDE 0435-303. CE. MK 9056N - Phase sequence relay. Detects phase sequence errors Output contact 2 changeovers Overall width: 22.5 mm. The MK 9056N monitors compliance with the ph...
DOLD
MK9056N.12 AC50/60Hz 380-500V
£ 128.255*
per piece
 
 piece
Dold Phase Monitoring Relay, 3 Phase, DPDT, DIN Rail / 4650744 (1 offer) 
MK 9040N - Asymmetry relay. Detects voltage asymmetry, phase loss, reverse voltage and phase sequence Impervious to symmetrical harmonics up to distortion factor of K 20 % 2 LED displays for voltag...
DOLD
MK9040N.12/001 3AC50/60Hz 400V
£ 149.065*
per piece
 
 piece
Dold Phase Monitoring Relay, 3 Phase, SPDT, DIN Rail / 3587049 (2 offers) 
IK9169 phase monitor, IK9168 phase monitor display. Detection of phase failure in three-phase systems Single-phase connection also an option Rest current principle Adjustable phase sequence LED dis...
DOLD
IK9169.11 3AC380-415/220-240V
from £ 75.003*
per piece
 
 piece
Module: voltage monitoring relay; for DIN rail mounting; DPDT (1 offer) 
Manufacturer: LOVATO ELECTRIC Mounting: for DIN rail mounting Operating temperature: -20...60°C Kind of output 1: DPDT Power supply: from tested wiring system IP rating: IP20 at terminal side Leads...
LOVATO Electric
PMV80NA240
from £ 281.46*
per piece
 
 piece
Dold Standstill Monitoring Relay, 1, 3 Phase, 3PDT, Maximum of 4 V, DIN Rail / 1812784 (1 offer) 
No external sensors necessary Independent of direction Broken wire detection Forcibly guided safety contacts: 3 NO contacts, 1 NC contact for AC 250 V 2 semiconductor monitoring outputs 1 monitorin...
DOLD
LH5946.48/61 0,2-4V UH=DC24V 0,2-6s
£ 627.453*
per piece
 
 piece
Siemens Voltage Monitoring Relay, 3 Phase, DPDT, DIN Rail / 2033898 (2 offers) 
The Siemens digital monitoring relay for three-phase voltage with N-conductor used as network monitoring relay with digital setting. It has LCD display and screw type of terminal type. It using sna...
Siemens
3UG4616-1CR20
from £ 147.00*
per piece
 
 piece
Dold Phase Monitoring Relay, 3 Phase, SPDT, DIN Rail / 4459074 (1 offer) 
IEC 255, EN 60255, VDE 0435 part 303. Load monitor BH 9097. The load monitor is suitable for monitoring electrical industrial drive systems with variable motor loads. Features:. The BH 9097 load mo...
DOLD
BH9097.38/001 3AC400V AC40A
£ 438.264*
per piece
 
 piece
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