A monitoring relay is used to monitor and report values that exceed predefined parameters.
These devices can be used to monitor electrical parameters, such as power factor, voltage, current or phase. They also monitor manufacturing parameters, including temperature, pressure, levels and frequencies.
As with other relays, monitoring models may be electromechanical, though most now are semiconductor-based solid state relays. Some are directly programmable and are presented in ISO cases for rail installation.
Choice depends on the intended application and the parameters to be monitored.
 |
  |
Automation and control relay C90 plus GE Digital Energy
The Multilin™ C90Plus is a powerful automation controller that eliminates the need for several external devices,...
 |
 |
Safety monitoring relay PNOZcompact Series PILZ
The automation expert Pilz is once again expanding its portfolio in the PNOZ range of safety relays, with functionality in mind: The safety relays PNOZcompact monitor the basic functions of emergency stop or safety gate, providing maximum safety up to Performance Level (PL) e or SIL 3. These safety relays are optimised for functionality and can be used in all areas of engineering: the compact class...
 |
 |
Crouzet, the automation control component manufacturer , offers advanced control relays Our C-Lynx measurement and control relays...
 |
 |
Voltage and phase measuring and monitoring relay 7SG26 SIEMENS Smart Grid
The 7SG26 series of relays provides the logical control of a circuit breaker for auto-reclose sequences. The required sequence depends on the substation primary plant arrangement....
 |
 |
Speed and stand-still monitoring relay max. 400 V | AZR31S1 series SCHMERSAL
Fail-safe standstill monitors Sensor-free detection of standstill by monitoring e.m.f. Direct connection to three-phase motors...
 |
 |
Level monitoring relay SIEMENS Low-Voltage & Products
Level Relays Overview Level relays are used for the monitoring and control of conductive, non-combustible liquids and powders. They ensure overflow and dry run protection. Due to their sensor performance, the devices can also be used for general resistance monitoring. LED displays: - Green LED: lights up when operational voltage is applied - Yellow LED:...
 |
 |
Monitoring relay 10 A, 24 V | 19 series FINDER France
19 Series - Override and Status indicating modules 1-5-16 A Status indicating modules Override...
 |
 |
Speed and stand-still monitoring relay max. 30 VDC | KFD2-SR2-2.W.SM PEPPERL & FUCHS
1-channel signal conditioner 24 V DC supply PNP/push-pull,...
 |
 |
Speed and stand-still monitoring relay max. 690 V | MOC3ZA series SICK
At a glance Standstill monitoring by means of residual voltage measurement 3 normally open and 1 normally closed positively guided safety contacts 2 application diagnostic outputs for...
 |
 |
Safety monitoring relay Eaton Moeller
Functional safety on machines – monitoring with safety relay ESR5 The EC machinery directive 2006/42/EC demands that there is no danger posed by machines. The monitoring...
 |
 |
Monitoring relay Zelio Control Schneider Electric - Automation and Control
They could monitor power supplies (phases, voltage, current, frequency) to protect motors and other equipments or control physical values such as level, speed and temperature. Phase control relay Detects all possbile...
 |
 |
Voltage measuring and monitoring relay KVGC series Alstom Grid
The KVGC relay provides regulation of the supply voltage within finite limits by controlling transformer tap changing. The KVGC202 can be integrated into an overall...
 |
 |
3-phase sequence, phase-loss relay The K8AB-PH1 monitoring relay is designed to monitor 3-phase 3-wire supplies. It simultaneously monitors phase sequence...
 |
 |
Monitoring relay RIDER series Weidmüller
RIDERSERIES The ideal relay version for the separation of input and output...
 |
 |
Monitoring relay Eaton Count Control Products
Eaton’s selection of Monitoring Relays can be easily customized...
 |
 |
Current measuring and monitoring relay 809S series ROCKWELL AUTOMATION
Bulletin 809S Current Monitoring Relays offer...
 |
 |
Current measuring and monitoring relay SAO OMRON
Solid-state, Plug-in Current Sensor Applicable to motor overcurrent protection and 3-phase...
 |
 |
Safety monitoring relay 700S-CF series Allen-Bradley
Bulletin 700S-CF Safety Control Relays provide mechanically or mirror...
 |
 |
- Voltage monitoring in 3-phase mains - monitoring of phase sequence ,phase failure, asymmetry; - Voltage monitoring in 3-phase and 1-phase mains - multifunctions...
 |
 |
Voltage measuring and monitoring relay UPA-130 Power Alert Marsh Bellofram
The UPA 130 Power Alert reduces the risk of electrical arc flash by pre-verifying the electrical isolation from outside of a control panel. Hardwired to the circuit breaker or main disconnect, the UPA flashes...
 |
 |
Level monitoring relay 16 A, 24 - 250 V | HRH-1 ETI
Level switch HRH-1 Advantages: - Serves for level monitoring in wells, tanks, pools, reservoirs.... Options: - single switch with single-state monitoring -...
 |
 |
Level monitoring relay SRA / SRE series ACS-CONTROL-SYSTEM GmbH
fill level limit switch SRA-100 - Sensitivity range adjustable to 100kΩ - 10µs/cm, optional 1MΩ / 8MΩ - Detection of one limit value or two-point-control - Supply voltage 24V DC / 230V AC - Compact design (22,5mm broad) - Assembly on rail fastening DIN...
 |
 |
Automation and control relay WEG
Main Features - Multifunction relay - Modular concept - Exclusive WLP software for ladder programming - Possibility of communication with most common networks: ProfiBus, ModBus and DeviceNet Description The SRW01 is a low-voltage, electric motor management system with state-of-the-art technology and network communication...
 |
 |
Automation and control relay SSR series Cognito Quam Electrotechnologies Ltd
Our fully protected Solid State Relay Analog Controller interface accepts a 0 - 10 VDC, PWM or potentiometer signal to drive a solid state relay (SSR) in...
 |
 |
Automation and control relay NZB6 series Chint Electric Co.,Ltd.
NZB6 Series Protection and Management Device Applications: for monitoring and protecting power equipment, distribution network and substations...
 |
 |
Three phase voltage and frequency monitoring relay G2FW50HzYFA02 Tele Haase Steuergeräte
The monitoring relays with the WatchDog seal provide detailed status indications in a compact, space-saving housing. The devices are notable...
 |
 |
Three phase voltage and frequency monitoring relay KNAE 140 Alfred Kuhse GmbH
The KNAE is a monitoring device used to monitor frequency, voltage, phase sequence, angle displacement and vector surge in a 3-phase mains net. All setting options can be conveniently configured using the KuPa 010 parameterisation software. Values, but not texts, can be optionally input directly into the device. The ability to input directly into the...
 |
 |
Voltage and frequency monitoring relay 0 - 500 V, 40 - 65 Hz | VMD423 series BENDER
According to DIN V VDE V 0126-1-1, the voltage and frequency shall be monitored when feeding power into the public low voltage grid from private electricity generation systems > 30 kW (such as CHPs, wind power stations, hydroelectric power plants...
 |
 |
Temperature monitoring relay CTT Contrel elettronica
Programmable thermal control unit up to 4 or 8 inputs from Rtd Pt100 sensors. • Programmable alarm, trip and ventilation threshold...
 |
 |
Overvoltage monitoring relay 63 - 690 V | Selco G3300 series Littelfuse
The G3300 Voltage Relay monitors voltage on generators, busbars or other distribution systems. The relay provides undervoltage and overvoltage, time delayed, and...
 |
 |
Monitoring relay 5 - 10 A | 101U, 105 Deltrol Controls
Electrical Relays - 5-15 amps - Typical applications: Lighting...
